Merge tag 'dm-pull-28jun22' of https://source.denx.de/u-boot/custodians/u-boot-dm into next

nman external-symbol improvements
Driver model memory-usage reporting
patman test-reporting improvements
Add bloblist design goals

59 files changed, 1723 insertions, 409 deletions

diff --git a/arch/arm/cpu/armv8/u-boot-spl.lds b/arch/arm/cpu/armv8/u-boot-spl.lds
index d02b788..7cb9d73 100644
--- a/arch/arm/cpu/armv8/u-boot-spl.lds
+++ b/arch/arm/cpu/armv8/u-boot-spl.lds
@@ -23,7 +23,7 @@ SECTIONS
 {
 	.text : {
 		. = ALIGN(8);
-		*(.__image_copy_start)
+		__image_copy_start = .;
 		CPUDIR/start.o (.text*)
 		*(.text*)
 	} >.sram
diff --git a/arch/sandbox/Kconfig b/arch/sandbox/Kconfig
index 5f55c7f..852a7c8 100644
--- a/arch/sandbox/Kconfig
+++ b/arch/sandbox/Kconfig
@@ -17,11 +17,11 @@ config SANDBOX64
 
 config SANDBOX_RAM_SIZE_MB
 	int "RAM size in MiB"
-	default 128
+	default 256
 	range 64 4095 if !SANDBOX64
 	range 64 268435456 if SANDBOX64
 	help
-	  Memory size of the sandbox in MiB. The default value is 128 MiB.
+	  Memory size of the sandbox in MiB. The default value is 256 MiB.
 	  The minimum value is 64 MiB. The maximum value is 4095 MiB for the
 	  32bit sandbox.
 
diff --git a/arch/sandbox/cpu/cpu.c b/arch/sandbox/cpu/cpu.c
index 7a82798..d077948 100644
--- a/arch/sandbox/cpu/cpu.c
+++ b/arch/sandbox/cpu/cpu.c
@@ -331,27 +331,27 @@ void *board_fdt_blob_setup(int *ret)
 		err = setup_auto_tree(blob);
 		if (!err)
 			goto done;
-		printf("Unable to create empty FDT: %s\n", fdt_strerror(err));
+		os_printf("Unable to create empty FDT: %s\n", fdt_strerror(err));
 		*ret = -EINVAL;
 		goto fail;
 	}
 
 	err = os_get_filesize(fname, &size);
 	if (err < 0) {
-		printf("Failed to find FDT file '%s'\n", fname);
+		os_printf("Failed to find FDT file '%s'\n", fname);
 		*ret = err;
 		goto fail;
 	}
 	fd = os_open(fname, OS_O_RDONLY);
 	if (fd < 0) {
-		printf("Failed to open FDT file '%s'\n", fname);
+		os_printf("Failed to open FDT file '%s'\n", fname);
 		*ret = -EACCES;
 		goto fail;
 	}
 
 	if (os_read(fd, blob, size) != size) {
 		os_close(fd);
-		printf("Failed to read FDT file '%s'\n", fname);
+		os_printf("Failed to read FDT file '%s'\n", fname);
 		*ret =  -EIO;
 		goto fail;
 	}
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index 3b23060..f937991 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -12,6 +12,7 @@
 #include <getopt.h>
 #include <setjmp.h>
 #include <signal.h>
+#include <stdarg.h>
 #include <stdio.h>
 #include <stdint.h>
 #include <stdlib.h>
@@ -54,6 +55,18 @@ ssize_t os_write(int fd, const void *buf, size_t count)
 	return write(fd, buf, count);
 }
 
+int os_printf(const char *fmt, ...)
+{
+	va_list args;
+	int i;
+
+	va_start(args, fmt);
+	i = vfprintf(stdout, fmt, args);
+	va_end(args);
+
+	return i;
+}
+
 off_t os_lseek(int fd, off_t offset, int whence)
 {
 	if (whence == OS_SEEK_SET)
diff --git a/cmd/dm.c b/cmd/dm.c
index ca60922..eb40f08 100644
--- a/cmd/dm.c
+++ b/cmd/dm.c
@@ -8,20 +8,13 @@
 
 #include <common.h>
 #include <command.h>
+#include <dm/root.h>
 #include <dm/util.h>
 
-static int do_dm_dump_all(struct cmd_tbl *cmdtp, int flag, int argc,
-			  char *const argv[])
-{
-	dm_dump_all();
-
-	return 0;
-}
-
-static int do_dm_dump_uclass(struct cmd_tbl *cmdtp, int flag, int argc,
-			     char *const argv[])
+static int do_dm_dump_driver_compat(struct cmd_tbl *cmdtp, int flag, int argc,
+				    char * const argv[])
 {
-	dm_dump_uclass();
+	dm_dump_driver_compat();
 
 	return 0;
 }
@@ -42,37 +35,68 @@ static int do_dm_dump_drivers(struct cmd_tbl *cmdtp, int flag, int argc,
 	return 0;
 }
 
-static int do_dm_dump_driver_compat(struct cmd_tbl *cmdtp, int flag, int argc,
-				    char * const argv[])
+#if CONFIG_IS_ENABLED(DM_STATS)
+static int do_dm_dump_mem(struct cmd_tbl *cmdtp, int flag, int argc,
+			  char *const argv[])
 {
-	dm_dump_driver_compat();
+	struct dm_stats mem;
+
+	dm_get_mem(&mem);
+	dm_dump_mem(&mem);
 
 	return 0;
 }
+#endif /* DM_STATS */
 
-static int do_dm_dump_static_driver_info(struct cmd_tbl *cmdtp, int flag, int argc,
-					 char * const argv[])
+static int do_dm_dump_static_driver_info(struct cmd_tbl *cmdtp, int flag,
+					 int argc, char * const argv[])
 {
 	dm_dump_static_driver_info();
 
 	return 0;
 }
 
+static int do_dm_dump_tree(struct cmd_tbl *cmdtp, int flag, int argc,
+			   char *const argv[])
+{
+	dm_dump_tree();
+
+	return 0;
+}
+
+static int do_dm_dump_uclass(struct cmd_tbl *cmdtp, int flag, int argc,
+			     char *const argv[])
+{
+	dm_dump_uclass();
+
+	return 0;
+}
+
+#if CONFIG_IS_ENABLED(DM_STATS)
+#define DM_MEM_HELP	"dm mem           Provide a summary of memory usage\n"
+#define DM_MEM		U_BOOT_SUBCMD_MKENT(mem, 1, 1, do_dm_dump_mem),
+#else
+#define DM_MEM_HELP
+#define DM_MEM
+#endif
+
 #if CONFIG_IS_ENABLED(SYS_LONGHELP)
 static char dm_help_text[] =
-	"tree          Dump driver model tree ('*' = activated)\n"
-	"dm uclass        Dump list of instances for each uclass\n"
+	"compat        Dump list of drivers with compatibility strings\n"
 	"dm devres        Dump list of device resources for each device\n"
 	"dm drivers       Dump list of drivers with uclass and instances\n"
-	"dm compat        Dump list of drivers with compatibility strings\n"
-	"dm static        Dump list of drivers with static platform data"
+	DM_MEM_HELP
+	"dm static        Dump list of drivers with static platform data\n"
+	"dn tree          Dump tree of driver model devices ('*' = activated)\n"
+	"dm uclass        Dump list of instances for each uclass"
 	;
 #endif
 
 U_BOOT_CMD_WITH_SUBCMDS(dm, "Driver model low level access", dm_help_text,
-	U_BOOT_SUBCMD_MKENT(tree, 1, 1, do_dm_dump_all),
-	U_BOOT_SUBCMD_MKENT(uclass, 1, 1, do_dm_dump_uclass),
+	U_BOOT_SUBCMD_MKENT(compat, 1, 1, do_dm_dump_driver_compat),
 	U_BOOT_SUBCMD_MKENT(devres, 1, 1, do_dm_dump_devres),
 	U_BOOT_SUBCMD_MKENT(drivers, 1, 1, do_dm_dump_drivers),
-	U_BOOT_SUBCMD_MKENT(compat, 1, 1, do_dm_dump_driver_compat),
-	U_BOOT_SUBCMD_MKENT(static, 1, 1, do_dm_dump_static_driver_info));
+	DM_MEM
+	U_BOOT_SUBCMD_MKENT(static, 1, 1, do_dm_dump_static_driver_info),
+	U_BOOT_SUBCMD_MKENT(tree, 1, 1, do_dm_dump_tree),
+	U_BOOT_SUBCMD_MKENT(uclass, 1, 1, do_dm_dump_uclass));
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 4851834..931619c 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -191,12 +191,25 @@ config SPL_BINMAN_SYMBOLS
 	depends on SPL_FRAMEWORK && BINMAN
 	default y
 	help
-	  This enables use of symbols in SPL which refer to U-Boot, enabling SPL
-	  to obtain the location of U-Boot simply by calling spl_get_image_pos()
-	  and spl_get_image_size().
+	  This enables use of symbols in SPL which refer to other entries in
+	  the same binman image as the SPL. These can be declared with the
+	  binman_sym_declare(type, entry, prop) macro and accessed by the
+	  binman_sym(type, entry, prop) macro defined in binman_sym.h.
 
-	  For this to work, you must have a U-Boot image in the binman image, so
-	  binman can update SPL with the location of it.
+	  See tools/binman/binman.rst for a detailed explanation.
+
+config SPL_BINMAN_UBOOT_SYMBOLS
+	bool "Declare binman symbols for U-Boot phases in SPL"
+	depends on SPL_BINMAN_SYMBOLS
+	default n if ARCH_IMX8M
+	default y
+	help
+	  This enables use of symbols in SPL which refer to U-Boot phases,
+	  enabling SPL to obtain the location and size of its next phase simply
+	  by calling spl_get_image_pos() and spl_get_image_size().
+
+	  For this to work, you must have all U-Boot phases in the same binman
+	  image, so binman can update SPL with the locations of everything.
 
 source "common/spl/Kconfig.nxp"
 
diff --git a/common/spl/Kconfig.tpl b/common/spl/Kconfig.tpl
index 9a0e719..e314b79 100644
--- a/common/spl/Kconfig.tpl
+++ b/common/spl/Kconfig.tpl
@@ -9,16 +9,29 @@ config TPL_SIZE_LIMIT
 	  If this value is zero, it is ignored.
 
 config TPL_BINMAN_SYMBOLS
-	bool "Declare binman symbols in TPL"
-	depends on SPL_FRAMEWORK && BINMAN
+	bool "Support binman symbols in TPL"
+	depends on TPL_FRAMEWORK && BINMAN
 	default y
 	help
-	  This enables use of symbols in TPL which refer to U-Boot, enabling TPL
-	  to obtain the location of U-Boot simply by calling spl_get_image_pos()
-	  and spl_get_image_size().
+	  This enables use of symbols in TPL which refer to other entries in
+	  the same binman image as the TPL. These can be declared with the
+	  binman_sym_declare(type, entry, prop) macro and accessed by the
+	  binman_sym(type, entry, prop) macro defined in binman_sym.h.
 
-	  For this to work, you must have a U-Boot image in the binman image, so
-	  binman can update TPL with the location of it.
+	  See tools/binman/binman.rst for a detailed explanation.
+
+config TPL_BINMAN_UBOOT_SYMBOLS
+	bool "Declare binman symbols for U-Boot phases in TPL"
+	depends on TPL_BINMAN_SYMBOLS
+	default n if ARCH_IMX8M
+	default y
+	help
+	  This enables use of symbols in TPL which refer to U-Boot phases,
+	  enabling TPL to obtain the location and size of its next phase simply
+	  by calling spl_get_image_pos() and spl_get_image_size().
+
+	  For this to work, you must have all U-Boot phases in the same binman
+	  image, so binman can update TPL with the locations of everything.
 
 config TPL_FRAMEWORK
 	bool "Support TPL based upon the common SPL framework"
diff --git a/common/spl/Kconfig.vpl b/common/spl/Kconfig.vpl
index ba1ea60..ba4b2e4 100644
--- a/common/spl/Kconfig.vpl
+++ b/common/spl/Kconfig.vpl
@@ -198,4 +198,29 @@ config VPL_TEXT_BASE
 	help
 	  The address in memory that VPL will be running from.
 
+config VPL_BINMAN_SYMBOLS
+	bool "Declare binman symbols in VPL"
+	depends on VPL_FRAMEWORK && BINMAN
+	default y
+	help
+	  This enables use of symbols in VPL which refer to other entries in
+	  the same binman image as the VPL. These can be declared with the
+	  binman_sym_declare(type, entry, prop) macro and accessed by the
+	  binman_sym(type, entry, prop) macro defined in binman_sym.h.
+
+	  See tools/binman/binman.rst for a detailed explanation.
+
+config VPL_BINMAN_UBOOT_SYMBOLS
+	bool "Declare binman symbols for U-Boot phases in VPL"
+	depends on VPL_BINMAN_SYMBOLS
+	default n if ARCH_IMX8M
+	default y
+	help
+	  This enables use of symbols in VPL which refer to U-Boot phases,
+	  enabling VPL to obtain the location and size of its next phase simply
+	  by calling spl_get_image_pos() and spl_get_image_size().
+
+	  For this to work, you must have all U-Boot phases in the same binman
+	  image, so binman can update VPL with the locations of everything.
+
 endmenu
diff --git a/common/spl/spl.c b/common/spl/spl.c
index 2a69a7c..29e0898 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -34,12 +34,14 @@
 #include <malloc.h>
 #include <mapmem.h>
 #include <dm/root.h>
+#include <dm/util.h>
 #include <linux/compiler.h>
 #include <fdt_support.h>
 #include <bootcount.h>
 #include <wdt.h>
 
 DECLARE_GLOBAL_DATA_PTR;
+DECLARE_BINMAN_MAGIC_SYM;
 
 #ifndef CONFIG_SYS_UBOOT_START
 #define CONFIG_SYS_UBOOT_START	CONFIG_SYS_TEXT_BASE
@@ -51,11 +53,10 @@ DECLARE_GLOBAL_DATA_PTR;
 
 u32 *boot_params_ptr = NULL;
 
-#if CONFIG_IS_ENABLED(BINMAN_SYMBOLS)
+#if CONFIG_IS_ENABLED(BINMAN_UBOOT_SYMBOLS)
 /* See spl.h for information about this */
 binman_sym_declare(ulong, u_boot_any, image_pos);
 binman_sym_declare(ulong, u_boot_any, size);
-#endif
 
 #ifdef CONFIG_TPL
 binman_sym_declare(ulong, u_boot_spl, image_pos);
@@ -67,6 +68,8 @@ binman_sym_declare(ulong, u_boot_vpl, image_pos);
 binman_sym_declare(ulong, u_boot_vpl, size);
 #endif
 
+#endif /* BINMAN_UBOOT_SYMBOLS */
+
 /* Define board data structure */
 static struct bd_info bdata __attribute__ ((section(".data")));
 
@@ -149,9 +152,11 @@ void spl_fixup_fdt(void *fdt_blob)
 #endif
 }
 
-#if CONFIG_IS_ENABLED(BINMAN_SYMBOLS)
 ulong spl_get_image_pos(void)
 {
+	if (!CONFIG_IS_ENABLED(BINMAN_UBOOT_SYMBOLS))
+		return BINMAN_SYM_MISSING;
+
 #ifdef CONFIG_VPL
 	if (spl_next_phase() == PHASE_VPL)
 		return binman_sym(ulong, u_boot_vpl, image_pos);
@@ -163,6 +168,9 @@ ulong spl_get_image_pos(void)
 
 ulong spl_get_image_size(void)
 {
+	if (!CONFIG_IS_ENABLED(BINMAN_UBOOT_SYMBOLS))
+		return BINMAN_SYM_MISSING;
+
 #ifdef CONFIG_VPL
 	if (spl_next_phase() == PHASE_VPL)
 		return binman_sym(ulong, u_boot_vpl, size);
@@ -171,7 +179,6 @@ ulong spl_get_image_size(void)
 		binman_sym(ulong, u_boot_spl, size) :
 		binman_sym(ulong, u_boot_any, size);
 }
-#endif /* BINMAN_SYMBOLS */
 
 ulong spl_get_image_text_base(void)
 {
@@ -222,7 +229,7 @@ __weak struct image_header *spl_get_load_buffer(ssize_t offset, size_t size)
 
 void spl_set_header_raw_uboot(struct spl_image_info *spl_image)
 {
-	ulong u_boot_pos = binman_sym(ulong, u_boot_any, image_pos);
+	ulong u_boot_pos = spl_get_image_pos();
 
 	spl_image->size = CONFIG_SYS_MONITOR_LEN;
 
@@ -780,6 +787,14 @@ void board_init_r(gd_t *dummy1, ulong dummy2)
 
 	bootcount_inc();
 
+	/* Dump driver model states to aid analysis */
+	if (CONFIG_IS_ENABLED(DM_STATS)) {
+		struct dm_stats mem;
+
+		dm_get_mem(&mem);
+		dm_dump_mem(&mem);
+	}
+
 	memset(&spl_image, '\0', sizeof(spl_image));
 #ifdef CONFIG_SYS_SPL_ARGS_ADDR
 	spl_image.arg = (void *)CONFIG_SYS_SPL_ARGS_ADDR;
diff --git a/common/spl/spl_ram.c b/common/spl/spl_ram.c
index 8296459..d647108 100644
--- a/common/spl/spl_ram.c
+++ b/common/spl/spl_ram.c
@@ -70,7 +70,7 @@ static int spl_ram_load_image(struct spl_image_info *spl_image,
 		load.read = spl_ram_load_read;
 		spl_load_simple_fit(spl_image, &load, 0, header);
 	} else {
-		ulong u_boot_pos = binman_sym(ulong, u_boot_any, image_pos);
+		ulong u_boot_pos = spl_get_image_pos();
 
 		debug("Legacy image\n");
 		/*
diff --git a/doc/develop/bloblist.rst b/doc/develop/bloblist.rst
index 572aa65..81643c7 100644
--- a/doc/develop/bloblist.rst
+++ b/doc/develop/bloblist.rst
@@ -11,6 +11,8 @@ a central structure. Each record of information is assigned a tag so that its
 owner can find it and update it. Each record is generally described by a C
 structure defined by the code that owns it.
 
+For the design goals of bloblist, please see the comments at the top of the
+`bloblist.h` header file.
 
 Passing state through the boot process
 --------------------------------------
diff --git a/doc/usage/cmd/dm.rst b/doc/usage/cmd/dm.rst
new file mode 100644
index 0000000..7bc1962
--- /dev/null
+++ b/doc/usage/cmd/dm.rst
@@ -0,0 +1,487 @@
+.. SPDX-License-Identifier: GPL-2.0+:
+
+dm command
+==========
+
+Synopis
+-------
+
+::
+
+    dm compat
+    dm devres
+    dm drivers
+    dm static
+    dm tree
+    dm uclass
+
+Description
+-----------
+
+The *dm* command allows viewing information about driver model, including the
+tree of devices and list of available uclasses.
+
+
+dm compat
+~~~~~~~~~
+
+This shows the compatible strings associated with each driver. Often there
+is only one, but multiple strings are shown on their own line. These strings
+can be looked up in the device tree files for each board, to see which driver is
+used for each node.
+
+dm devres
+~~~~~~~~~
+
+This shows a list of a `devres` (device resource) records for a device. Some
+drivers use the devres API to allocate memory, so that it can be freed
+automatically (without any code needed in the driver's remove() method) when the
+device is removed.
+
+This feature is controlled by CONFIG_DEVRES so no useful output is obtained if
+this option is disabled.
+
+dm drivers
+~~~~~~~~~~
+
+This shows all the available drivers, their uclass and a list of devices that
+use that driver, each on its own line. Drivers with no devices are shown with
+`<none>` as the driver name.
+
+
+dm mem
+~~~~~~
+
+This subcommand is really just for debugging and exploration. It can be enabled
+with the `CONFIG_DM_STATS` option.
+
+All output is in hex except that in brackets which is decimal.
+
+The output consists of a header shows the size of the main device model
+structures (struct udevice, struct driver, struct uclass and struct uc_driver)
+and the count and memory used by each (number of devices, memory used by
+devices, memory used by device names, number of uclasses, memory used by
+uclasses).
+
+After that is a table of information about each type of data that can be
+attached to a device, showing the number that have non-null data for that type,
+the total size of all that data, the amount of memory used in total, the
+amount that would be used if this type uses tags instead and the amount that
+would be thus saved.
+
+The `driver_data` line shows the number of devices which have non-NULL driver
+data.
+
+The `tags` line shows the number of tags and the memory used by those.
+
+At the bottom is an indication of the total memory usage obtained by undertaking
+various changes, none of which is currently implemented in U-Boot:
+
+With tags
+    Using tags instead of all attached types
+
+Singly linked
+    Using a singly linked list
+
+driver index
+    Using a driver index instead of a pointer
+
+uclass index
+    Using a uclass index instead of a pointer
+
+Drop device name
+    Using empty device names
+
+
+dm static
+~~~~~~~~~
+
+This shows devices bound by platform data, i.e. not from the device tree. There
+are normally none of these, but some boards may use static devices for space
+reasons.
+
+
+dm tree
+~~~~~~~
+
+This shows the full tree of devices including the following fields:
+
+uclass
+    Shows the name of the uclass for the device
+
+Index
+    Shows the index number of the device, within the uclass. This shows the
+    ordering within the uclass, but not the sequence number.
+
+Probed
+    Shows `+` if the device is active
+
+Driver
+    Shows the name of the driver that this device uses
+
+Name
+    Shows the device name as well as the tree structure, since child devices are
+    shown attached to their parent.
+
+
+dm uclass
+~~~~~~~~~
+
+This shows each uclass along with a list of devices in that uclass. The uclass
+ID is shown (e.g. uclass 7) and its name.
+
+For each device, the format is::
+
+    n    name @ a, seq s
+
+where `n` is the index within the uclass, `a` is the address of the device in
+memory and `s` is the sequence number of the device.
+
+
+Examples
+--------
+
+dm compat
+~~~~~~~~~
+
+This example shows an abridged version of the sandbox output::
+
+    => dm compat
+    Driver                Compatible
+    --------------------------------
+    act8846_reg
+    sandbox_adder         sandbox,adder
+    axi_sandbox_bus       sandbox,axi
+    blk_partition
+    bootcount-rtc         u-boot,bootcount-rtc
+    ...
+    rockchip_rk805        rockchip,rk805
+                          rockchip,rk808
+                          rockchip,rk809
+                          rockchip,rk816
+                          rockchip,rk817
+                          rockchip,rk818
+    root_driver
+    rtc-rv8803            microcrystal,rv8803
+                          epson,rx8803
+                          epson,rx8900
+    ...
+    wdt_gpio              linux,wdt-gpio
+    wdt_sandbox           sandbox,wdt
+
+
+dm devres
+~~~~~~~~~
+
+This example shows an abridged version of the sandbox test output (running
+U-Boot with the -T flag)::
+
+    => dm devres
+    - root_driver
+    - demo_shape_drv
+    - demo_simple_drv
+    - demo_shape_drv
+    ...
+    - h-test
+    - devres-test
+        00000000130194e0 (100 byte) devm_kmalloc_release  BIND
+    - another-test
+    ...
+    - syscon@3
+    - a-mux-controller
+        0000000013025e60 (96 byte) devm_kmalloc_release  PROBE
+        0000000013025f00 (24 byte) devm_kmalloc_release  PROBE
+        0000000013026010 (24 byte) devm_kmalloc_release  PROBE
+        0000000013026070 (24 byte) devm_kmalloc_release  PROBE
+        00000000130260d0 (24 byte) devm_kmalloc_release  PROBE
+    - syscon@3
+    - a-mux-controller
+        0000000013026150 (96 byte) devm_kmalloc_release  PROBE
+        00000000130261f0 (24 byte) devm_kmalloc_release  PROBE
+        0000000013026300 (24 byte) devm_kmalloc_release  PROBE
+        0000000013026360 (24 byte) devm_kmalloc_release  PROBE
+        00000000130263c0 (24 byte) devm_kmalloc_release  PROBE
+    - emul-mux-controller
+        0000000013025fa0 (32 byte) devm_kmalloc_release  PROBE
+    - testfdtm0
+    - testfdtm1
+    ...
+    - pinmux_spi0_pins
+    - pinmux_uart0_pins
+    - pinctrl-single-bits
+        0000000013229180 (320 byte) devm_kmalloc_release  PROBE
+        0000000013229300 (40 byte) devm_kmalloc_release  PROBE
+        0000000013229370 (160 byte) devm_kmalloc_release  PROBE
+        000000001322c190 (40 byte) devm_kmalloc_release  PROBE
+        000000001322c200 (32 byte) devm_kmalloc_release  PROBE
+    - pinmux_i2c0_pins
+    ...
+    - reg@0
+    - reg@1
+
+
+dm drivers
+~~~~~~~~~~
+
+This example shows an abridged version of the sandbox output::
+
+    => dm drivers
+    Driver                    uid uclass               Devices
+    ----------------------------------------------------------
+    act8846_reg               087 regulator            <none>
+    sandbox_adder             021 axi                  adder
+                                                    adder
+    axi_sandbox_bus           021 axi                  axi@0
+    ...
+    da7219                    061 misc                 <none>
+    demo_shape_drv            001 demo                 demo_shape_drv
+                                                    demo_shape_drv
+                                                    demo_shape_drv
+    demo_simple_drv           001 demo                 demo_simple_drv
+                                                    demo_simple_drv
+    testfdt_drv               003 testfdt              a-test
+                                                    b-test
+                                                    d-test
+                                                    e-test
+                                                    f-test
+                                                    g-test
+                                                    another-test
+                                                    chosen-test
+    testbus_drv               005 testbus              some-bus
+                                                    mmio-bus@0
+                                                    mmio-bus@1
+    dsa-port                  039 ethernet             lan0
+                                                    lan1
+    dsa_sandbox               035 dsa                  dsa-test
+    eep_sandbox               121 w1_eeprom            <none>
+    ...
+    pfuze100_regulator        087 regulator            <none>
+    phy_sandbox               077 phy                  bind-test-child1
+                                                    gen_phy@0
+                                                    gen_phy@1
+                                                    gen_phy@2
+    pinconfig                 078 pinconfig            gpios
+                                                    gpio0
+                                                    gpio1
+                                                    gpio2
+                                                    gpio3
+                                                    i2c
+                                                    groups
+                                                    pins
+                                                    i2s
+                                                    spi
+                                                    cs
+                                                    pinmux_pwm_pins
+                                                    pinmux_spi0_pins
+                                                    pinmux_uart0_pins
+                                                    pinmux_i2c0_pins
+                                                    pinmux_lcd_pins
+    pmc_sandbox               017 power-mgr            pci@1e,0
+    act8846 pmic              080 pmic                 <none>
+    max77686_pmic             080 pmic                 <none>
+    mc34708_pmic              080 pmic                 pmic@41
+    ...
+    wdt_gpio                  122 watchdog             gpio-wdt
+    wdt_sandbox               122 watchdog             wdt@0
+    =>
+
+
+dm mem
+~~~~~~
+
+This example shows the sandbox output::
+
+    > dm mem
+    Struct sizes: udevice b0, driver 80, uclass 30, uc_driver 78
+    Memory: device fe:aea0, device names a16, uclass 5e:11a0
+
+    Attached type    Count   Size    Cur   Tags   Save
+    ---------------  -----  -----  -----  -----  -----
+    plat                45    a8f   aea0   a7c4    6dc (1756)
+    parent_plat         1a    3b8   aea0   a718    788 (1928)
+    uclass_plat         3d    6b4   aea0   a7a4    6fc (1788)
+    priv                8a   68f3   aea0   a8d8    5c8 (1480)
+    parent_priv          8   38a0   aea0   a6d0    7d0 (2000)
+    uclass_priv         4e   14a6   aea0   a7e8    6b8 (1720)
+    driver_data          f      0   aea0   a6ec    7b4 (1972)
+    uclass               6     20
+    Attached total     191   cb54                  3164 (12644)
+    tags                 0      0
+
+    Total size: 18b94 (101268)
+
+    With tags:       15a30 (88624)
+    - singly-linked: 14260 (82528)
+    - driver index:  13b6e (80750)
+    - uclass index:  1347c (78972)
+    Drop device name (not SRAM): a16 (2582)
+    =>
+
+
+dm static
+~~~~~~~~~
+
+This example shows the sandbox output::
+
+    => dm static
+    Driver                    Address
+    ---------------------------------
+    demo_shape_drv            0000562edab8dca0
+    demo_simple_drv           0000562edab8dca0
+    demo_shape_drv            0000562edab8dc90
+    demo_simple_drv           0000562edab8dc80
+    demo_shape_drv            0000562edab8dc80
+    test_drv                  0000562edaae8840
+    test_drv                  0000562edaae8848
+    test_drv                  0000562edaae8850
+    sandbox_gpio              0000000000000000
+    mod_exp_sw                0000000000000000
+    sandbox_test_proc         0000562edabb5330
+    qfw_sandbox               0000000000000000
+    sandbox_timer             0000000000000000
+    sandbox_serial            0000562edaa8ed00
+    sysreset_sandbox          0000000000000000
+
+
+dm tree
+-------
+
+This example shows the abridged sandbox output::
+
+    => dm tree
+    Class     Index  Probed  Driver                Name
+    -----------------------------------------------------------
+    root          0  [ + ]   root_driver           root_driver
+    demo          0  [   ]   demo_shape_drv        |-- demo_shape_drv
+    demo          1  [   ]   demo_simple_drv       |-- demo_simple_drv
+    demo          2  [   ]   demo_shape_drv        |-- demo_shape_drv
+    demo          3  [   ]   demo_simple_drv       |-- demo_simple_drv
+    demo          4  [   ]   demo_shape_drv        |-- demo_shape_drv
+    test          0  [   ]   test_drv              |-- test_drv
+    test          1  [   ]   test_drv              |-- test_drv
+    test          2  [   ]   test_drv              |-- test_drv
+    ..
+    sysreset      0  [   ]   sysreset_sandbox      |-- sysreset_sandbox
+    bootstd       0  [   ]   bootstd_drv           |-- bootstd
+    bootmeth      0  [   ]   bootmeth_distro       |   |-- syslinux
+    bootmeth      1  [   ]   bootmeth_efi          |   `-- efi
+    reboot-mod    0  [   ]   reboot-mode-gpio      |-- reboot-mode0
+    reboot-mod    1  [   ]   reboot-mode-rtc       |-- reboot-mode@14
+    ...
+    ethernet      7  [ + ]   dsa-port              |   `-- lan1
+    pinctrl       0  [ + ]   sandbox_pinctrl_gpio  |-- pinctrl-gpio
+    gpio          1  [ + ]   sandbox_gpio          |   |-- base-gpios
+    nop           0  [ + ]   gpio_hog              |   |   |-- hog_input_active_low
+    nop           1  [ + ]   gpio_hog              |   |   |-- hog_input_active_high
+    nop           2  [ + ]   gpio_hog              |   |   |-- hog_output_low
+    nop           3  [ + ]   gpio_hog              |   |   `-- hog_output_high
+    gpio          2  [   ]   sandbox_gpio          |   |-- extra-gpios
+    gpio          3  [   ]   sandbox_gpio          |   `-- pinmux-gpios
+    i2c           0  [ + ]   sandbox_i2c           |-- i2c@0
+    i2c_eeprom    0  [   ]   i2c_eeprom            |   |-- eeprom@2c
+    i2c_eeprom    1  [   ]   i2c_eeprom_partition  |   |   `-- bootcount@10
+    rtc           0  [   ]   sandbox_rtc           |   |-- rtc@43
+    rtc           1  [ + ]   sandbox_rtc           |   |-- rtc@61
+    i2c_emul_p    0  [ + ]   sandbox_i2c_emul_par  |   |-- emul
+    i2c_emul      0  [   ]   sandbox_i2c_eeprom_e  |   |   |-- emul-eeprom
+    i2c_emul      1  [   ]   sandbox_i2c_rtc_emul  |   |   |-- emul0
+    i2c_emul      2  [ + ]   sandbox_i2c_rtc_emul  |   |   |-- emull
+    i2c_emul      3  [   ]   sandbox_i2c_pmic_emu  |   |   |-- pmic-emul0
+    i2c_emul      4  [   ]   sandbox_i2c_pmic_emu  |   |   `-- pmic-emul1
+    pmic          0  [   ]   sandbox_pmic          |   |-- sandbox_pmic
+    regulator     0  [   ]   sandbox_buck          |   |   |-- buck1
+    regulator     1  [   ]   sandbox_buck          |   |   |-- buck2
+    regulator     2  [   ]   sandbox_ldo           |   |   |-- ldo1
+    regulator     3  [   ]   sandbox_ldo           |   |   |-- ldo2
+    regulator     4  [   ]   sandbox_buck          |   |   `-- no_match_by_nodename
+    pmic          1  [   ]   mc34708_pmic          |   `-- pmic@41
+    bootcount     0  [ + ]   bootcount-rtc         |-- bootcount@0
+    bootcount     1  [   ]   bootcount-i2c-eeprom  |-- bootcount
+    ...
+    clk           4  [   ]   fixed_clock           |-- osc
+    firmware      0  [   ]   sandbox_firmware      |-- sandbox-firmware
+    scmi_agent    0  [   ]   sandbox-scmi_agent    `-- scmi
+    clk           5  [   ]   scmi_clk                  |-- protocol@14
+    reset         2  [   ]   scmi_reset_domain         |-- protocol@16
+    nop           8  [   ]   scmi_voltage_domain       `-- regulators
+    regulator     5  [   ]   scmi_regulator                |-- reg@0
+    regulator     6  [   ]   scmi_regulator                `-- reg@1
+    =>
+
+
+dm uclass
+~~~~~~~~~
+
+This example shows the abridged sandbox output::
+
+    => dm uclass
+    uclass 0: root
+    0   * root_driver @ 03015460, seq 0
+
+    uclass 1: demo
+    0     demo_shape_drv @ 03015560, seq 0
+    1     demo_simple_drv @ 03015620, seq 1
+    2     demo_shape_drv @ 030156e0, seq 2
+    3     demo_simple_drv @ 030157a0, seq 3
+    4     demo_shape_drv @ 03015860, seq 4
+
+    uclass 2: test
+    0     test_drv @ 03015980, seq 0
+    1     test_drv @ 03015a60, seq 1
+    2     test_drv @ 03015b40, seq 2
+    ...
+    uclass 20: audio-codec
+    0     audio-codec @ 030168e0, seq 0
+
+    uclass 21: axi
+    0     adder @ 0301db60, seq 1
+    1     adder @ 0301dc40, seq 2
+    2     axi@0 @ 030217d0, seq 0
+
+    uclass 22: blk
+    0     mmc2.blk @ 0301ca00, seq 0
+    1     mmc1.blk @ 0301cee0, seq 1
+    2     mmc0.blk @ 0301d380, seq 2
+
+    uclass 23: bootcount
+    0   * bootcount@0 @ 0301b3f0, seq 0
+    1     bootcount @ 0301b4b0, seq 1
+    2     bootcount_4@0 @ 0301b570, seq 2
+    3     bootcount_2@0 @ 0301b630, seq 3
+
+    uclass 24: bootdev
+    0     mmc2.bootdev @ 0301cbb0, seq 0
+    1     mmc1.bootdev @ 0301d050, seq 1
+    2     mmc0.bootdev @ 0301d4f0, seq 2
+
+    ...
+    uclass 78: pinconfig
+    0     gpios @ 03022410, seq 0
+    1     gpio0 @ 030224d0, seq 1
+    2     gpio1 @ 03022590, seq 2
+    3     gpio2 @ 03022650, seq 3
+    4     gpio3 @ 03022710, seq 4
+    5     i2c @ 030227d0, seq 5
+    6     groups @ 03022890, seq 6
+    7     pins @ 03022950, seq 7
+    8     i2s @ 03022a10, seq 8
+    9     spi @ 03022ad0, seq 9
+    10    cs @ 03022b90, seq 10
+    11    pinmux_pwm_pins @ 03022e10, seq 11
+    12    pinmux_spi0_pins @ 03022ed0, seq 12
+    13    pinmux_uart0_pins @ 03022f90, seq 13
+    14  * pinmux_i2c0_pins @ 03023130, seq 14
+    15  * pinmux_lcd_pins @ 030231f0, seq 15
+
+    ...
+    uclass 119: virtio
+    0     sandbox_virtio1 @ 030220d0, seq 0
+    1     sandbox_virtio2 @ 03022190, seq 1
+
+    uclass 120: w1
+    uclass 121: w1_eeprom
+    uclass 122: watchdog
+    0   * gpio-wdt @ 0301c070, seq 0
+    1   * wdt@0 @ 03021710, seq 1
+
+    =>
diff --git a/doc/usage/index.rst b/doc/usage/index.rst
index 8d08ea1..8b98629 100644
--- a/doc/usage/index.rst
+++ b/doc/usage/index.rst
@@ -33,6 +33,7 @@ Shell commands
    cmd/bootz
    cmd/cbsysinfo
    cmd/conitrace
+   cmd/dm
    cmd/echo
    cmd/env
    cmd/event
diff --git a/drivers/core/Kconfig b/drivers/core/Kconfig
index d3fe1d4..8eb0070 100644
--- a/drivers/core/Kconfig
+++ b/drivers/core/Kconfig
@@ -75,6 +75,27 @@ config DM_DEBUG
 	help
 	  Say Y here if you want to compile in debug messages in DM core.
 
+config DM_STATS
+	bool "Collect and show driver model stats"
+	depends on DM
+	default y if SANDBOX
+	help
+	  Enable this to collect and display memory statistics about driver
+	  model. This can help to figure out where all the memory is going and
+	  to find optimisations.
+
+	  To display the memory stats, use the 'dm mem' command.
+
+config SPL_DM_STATS
+	bool "Collect and show driver model stats in SPL"
+	depends on DM_SPL
+	help
+	  Enable this to collect and display memory statistics about driver
+	  model. This can help to figure out where all the memory is going and
+	  to find optimisations.
+
+	  The stats are displayed just before SPL boots to the next phase.
+
 config DM_DEVICE_REMOVE
 	bool "Support device removal"
 	depends on DM
diff --git a/drivers/core/device-remove.c b/drivers/core/device-remove.c
index 73d2e9e..a86b932 100644
--- a/drivers/core/device-remove.c
+++ b/drivers/core/device-remove.c
@@ -29,7 +29,7 @@ int device_chld_unbind(struct udevice *dev, struct driver *drv)
 
 	assert(dev);
 
-	list_for_each_entry_safe(pos, n, &dev->child_head, sibling_node) {
+	device_foreach_child_safe(pos, n, dev) {
 		if (drv && (pos->driver != drv))
 			continue;
 
@@ -52,7 +52,7 @@ int device_chld_remove(struct udevice *dev, struct driver *drv,
 
 	assert(dev);
 
-	list_for_each_entry_safe(pos, n, &dev->child_head, sibling_node) {
+	device_foreach_child_safe(pos, n, dev) {
 		int ret;
 
 		if (drv && (pos->driver != drv))
diff --git a/drivers/core/device.c b/drivers/core/device.c
index 3d7fbfe..d9ce546 100644
--- a/drivers/core/device.c
+++ b/drivers/core/device.c
@@ -284,8 +284,7 @@ int device_reparent(struct udevice *dev, struct udevice *new_parent)
 	assert(dev);
 	assert(new_parent);
 
-	list_for_each_entry_safe(pos, n, &dev->parent->child_head,
-				 sibling_node) {
+	device_foreach_child_safe(pos, n, dev->parent) {
 		if (pos->driver != dev->driver)
 			continue;
 
@@ -675,6 +674,71 @@ void *dev_get_parent_priv(const struct udevice *dev)
 	return dm_priv_to_rw(dev->parent_priv_);
 }
 
+void *dev_get_attach_ptr(const struct udevice *dev, enum dm_tag_t tag)
+{
+	switch (tag) {
+	case DM_TAG_PLAT:
+		return dev_get_plat(dev);
+	case DM_TAG_PARENT_PLAT:
+		return dev_get_parent_plat(dev);
+	case DM_TAG_UC_PLAT:
+		return dev_get_uclass_plat(dev);
+	case DM_TAG_PRIV:
+		return dev_get_priv(dev);
+	case DM_TAG_PARENT_PRIV:
+		return dev_get_parent_priv(dev);
+	case DM_TAG_UC_PRIV:
+		return dev_get_uclass_priv(dev);
+	default:
+		return NULL;
+	}
+}
+
+int dev_get_attach_size(const struct udevice *dev, enum dm_tag_t tag)
+{
+	const struct udevice *parent = dev_get_parent(dev);
+	const struct uclass *uc = dev->uclass;
+	const struct uclass_driver *uc_drv = uc->uc_drv;
+	const struct driver *parent_drv = NULL;
+	int size = 0;
+
+	if (parent)
+		parent_drv = parent->driver;
+
+	switch (tag) {
+	case DM_TAG_PLAT:
+		size = dev->driver->plat_auto;
+		break;
+	case DM_TAG_PARENT_PLAT:
+		if (parent) {
+			size = parent_drv->per_child_plat_auto;
+			if (!size)
+				size = parent->uclass->uc_drv->per_child_plat_auto;
+		}
+		break;
+	case DM_TAG_UC_PLAT:
+		size = uc_drv->per_device_plat_auto;
+		break;
+	case DM_TAG_PRIV:
+		size = dev->driver->priv_auto;
+		break;
+	case DM_TAG_PARENT_PRIV:
+		if (parent) {
+			size = parent_drv->per_child_auto;
+			if (!size)
+				size = parent->uclass->uc_drv->per_child_auto;
+		}
+		break;
+	case DM_TAG_UC_PRIV:
+		size = uc_drv->per_device_auto;
+		break;
+	default:
+		break;
+	}
+
+	return size;
+}
+
 static int device_get_device_tail(struct udevice *dev, int ret,
 				  struct udevice **devp)
 {
@@ -724,7 +788,7 @@ int device_get_child(const struct udevice *parent, int index,
 {
 	struct udevice *dev;
 
-	list_for_each_entry(dev, &parent->child_head, sibling_node) {
+	device_foreach_child(dev, parent) {
 		if (!index--)
 			return device_get_device_tail(dev, 0, devp);
 	}
@@ -737,7 +801,7 @@ int device_get_child_count(const struct udevice *parent)
 	struct udevice *dev;
 	int count = 0;
 
-	list_for_each_entry(dev, &parent->child_head, sibling_node)
+	device_foreach_child(dev, parent)
 		count++;
 
 	return count;
@@ -748,7 +812,7 @@ int device_get_decendent_count(const struct udevice *parent)
 	const struct udevice *dev;
 	int count = 1;
 
-	list_for_each_entry(dev, &parent->child_head, sibling_node)
+	device_foreach_child(dev, parent)
 		count += device_get_decendent_count(dev);
 
 	return count;
@@ -761,7 +825,7 @@ int device_find_child_by_seq(const struct udevice *parent, int seq,
 
 	*devp = NULL;
 
-	list_for_each_entry(dev, &parent->child_head, sibling_node) {
+	device_foreach_child(dev, parent) {
 		if (dev->seq_ == seq) {
 			*devp = dev;
 			return 0;
@@ -790,7 +854,7 @@ int device_find_child_by_of_offset(const struct udevice *parent, int of_offset,
 
 	*devp = NULL;
 
-	list_for_each_entry(dev, &parent->child_head, sibling_node) {
+	device_foreach_child(dev, parent) {
 		if (dev_of_offset(dev) == of_offset) {
 			*devp = dev;
 			return 0;
@@ -819,7 +883,7 @@ static struct udevice *_device_find_global_by_ofnode(struct udevice *parent,
 	if (ofnode_equal(dev_ofnode(parent), ofnode))
 		return parent;
 
-	list_for_each_entry(dev, &parent->child_head, sibling_node) {
+	device_foreach_child(dev, parent) {
 		found = _device_find_global_by_ofnode(dev, ofnode);
 		if (found)
 			return found;
@@ -897,7 +961,7 @@ int device_find_first_inactive_child(const struct udevice *parent,
 	struct udevice *dev;
 
 	*devp = NULL;
-	list_for_each_entry(dev, &parent->child_head, sibling_node) {
+	device_foreach_child(dev, parent) {
 		if (!device_active(dev) &&
 		    device_get_uclass_id(dev) == uclass_id) {
 			*devp = dev;
@@ -915,7 +979,7 @@ int device_find_first_child_by_uclass(const struct udevice *parent,
 	struct udevice *dev;
 
 	*devp = NULL;
-	list_for_each_entry(dev, &parent->child_head, sibling_node) {
+	device_foreach_child(dev, parent) {
 		if (device_get_uclass_id(dev) == uclass_id) {
 			*devp = dev;
 			return 0;
@@ -932,7 +996,7 @@ int device_find_child_by_namelen(const struct udevice *parent, const char *name,
 
 	*devp = NULL;
 
-	list_for_each_entry(dev, &parent->child_head, sibling_node) {
+	device_foreach_child(dev, parent) {
 		if (!strncmp(dev->name, name, len) &&
 		    strlen(dev->name) == len) {
 			*devp = dev;
diff --git a/drivers/core/devres.c b/drivers/core/devres.c
index 313ddc7..78914bd 100644
--- a/drivers/core/devres.c
+++ b/drivers/core/devres.c
@@ -232,7 +232,7 @@ static void dump_resources(struct udevice *dev, int depth)
 		       (unsigned long)dr->size, dr->name,
 		       devres_phase_name[dr->phase]);
 
-	list_for_each_entry(child, &dev->child_head, sibling_node)
+	device_foreach_child(child, dev)
 		dump_resources(child, depth + 1);
 }
 
diff --git a/drivers/core/dump.c b/drivers/core/dump.c
index f2f9cac..1c1f7e4 100644
--- a/drivers/core/dump.c
+++ b/drivers/core/dump.c
@@ -39,13 +39,13 @@ static void show_devices(struct udevice *dev, int depth, int last_flag)
 
 	printf("%s\n", dev->name);
 
-	list_for_each_entry(child, &dev->child_head, sibling_node) {
+	device_foreach_child(child, dev) {
 		is_last = list_is_last(&child->sibling_node, &dev->child_head);
 		show_devices(child, depth + 1, (last_flag << 1) | is_last);
 	}
 }
 
-void dm_dump_all(void)
+void dm_dump_tree(void)
 {
 	struct udevice *root;
 
@@ -89,8 +89,6 @@ void dm_dump_uclass(void)
 			continue;
 
 		printf("uclass %d: %s\n", id, uc->uc_drv->name);
-		if (list_empty(&uc->dev_head))
-			continue;
 		uclass_foreach_dev(dev, uc) {
 			dm_display_line(dev, i);
 			i++;
@@ -171,8 +169,79 @@ void dm_dump_static_driver_info(void)
 
 	puts("Driver                    Address\n");
 	puts("---------------------------------\n");
-	for (entry = drv; entry != drv + n_ents; entry++) {
-		printf("%-25.25s @%08lx\n", entry->name,
-		       (ulong)map_to_sysmem(entry->plat));
+	for (entry = drv; entry != drv + n_ents; entry++)
+		printf("%-25.25s %p\n", entry->name, entry->plat);
+}
+
+void dm_dump_mem(struct dm_stats *stats)
+{
+	int total, total_delta;
+	int i;
+
+	/* Support SPL printf() */
+	printf("Struct sizes: udevice %x, driver %x, uclass %x, uc_driver %x\n",
+	       (int)sizeof(struct udevice), (int)sizeof(struct driver),
+	       (int)sizeof(struct uclass), (int)sizeof(struct uclass_driver));
+	printf("Memory: device %x:%x, device names %x, uclass %x:%x\n",
+	       stats->dev_count, stats->dev_size, stats->dev_name_size,
+	       stats->uc_count, stats->uc_size);
+	printf("\n");
+	printf("%-15s  %5s  %5s  %5s  %5s  %5s\n", "Attached type", "Count",
+	       "Size", "Cur", "Tags", "Save");
+	printf("%-15s  %5s  %5s  %5s  %5s  %5s\n", "---------------", "-----",
+	       "-----", "-----", "-----", "-----");
+	total_delta = 0;
+	for (i = 0; i < DM_TAG_ATTACH_COUNT; i++) {
+		int cur_size, new_size, delta;
+
+		cur_size = stats->dev_count * sizeof(struct udevice);
+		new_size = stats->dev_count * (sizeof(struct udevice) -
+			sizeof(void *));
+		/*
+		 * Let's assume we can fit each dmtag_node into 32 bits. We can
+		 * limit the 'tiny tags' feature to SPL with
+		 * CONFIG_SPL_SYS_MALLOC_F_LEN <= 64KB, so needing 14 bits to
+		 * point to anything in that region (with 4-byte alignment).
+		 * So:
+		 *    4 bits for tag
+		 *    14 bits for offset of dev
+		 *    14 bits for offset of data
+		 */
+		new_size += stats->attach_count[i] * sizeof(u32);
+		delta = cur_size - new_size;
+		total_delta += delta;
+		printf("%-16s %5x %6x %6x %6x %6x (%d)\n", tag_get_name(i),
+		       stats->attach_count[i], stats->attach_size[i],
+		       cur_size, new_size, delta > 0 ? delta : 0, delta);
 	}
+	printf("%-16s %5x %6x\n", "uclass", stats->uc_attach_count,
+	       stats->uc_attach_size);
+	printf("%-16s %5x %6x  %5s  %5s  %6x (%d)\n", "Attached total",
+	       stats->attach_count_total + stats->uc_attach_count,
+	       stats->attach_size_total + stats->uc_attach_size, "", "",
+	       total_delta > 0 ? total_delta : 0, total_delta);
+	printf("%-16s %5x %6x\n", "tags", stats->tag_count, stats->tag_size);
+	printf("\n");
+	printf("Total size: %x (%d)\n", stats->total_size, stats->total_size);
+	printf("\n");
+
+	total = stats->total_size;
+	total -= total_delta;
+	printf("With tags:       %x (%d)\n", total, total);
+
+	/* Use singly linked lists in struct udevice (3 nodes in each) */
+	total -= sizeof(void *) * 3 * stats->dev_count;
+	printf("- singly-linked: %x (%d)\n", total, total);
+
+	/* Use an index into the struct_driver list instead of a pointer */
+	total = total + stats->dev_count * (1 - sizeof(void *));
+	printf("- driver index:  %x (%d)\n", total, total);
+
+	/* Same with the uclass */
+	total = total + stats->dev_count * (1 - sizeof(void *));
+	printf("- uclass index:  %x (%d)\n", total, total);
+
+	/* Drop the device name */
+	printf("Drop device name (not SRAM): %x (%d)\n", stats->dev_name_size,
+	       stats->dev_name_size);
 }
diff --git a/drivers/core/root.c b/drivers/core/root.c
index 17dd120..f24ddfa 100644
--- a/drivers/core/root.c
+++ b/drivers/core/root.c
@@ -449,6 +449,59 @@ void dm_get_stats(int *device_countp, int *uclass_countp)
 	*uclass_countp = uclass_get_count();
 }
 
+void dev_collect_stats(struct dm_stats *stats, const struct udevice *parent)
+{
+	const struct udevice *dev;
+	int i;
+
+	stats->dev_count++;
+	stats->dev_size += sizeof(struct udevice);
+	stats->dev_name_size += strlen(parent->name) + 1;
+	for (i = 0; i < DM_TAG_ATTACH_COUNT; i++) {
+		int size = dev_get_attach_size(parent, i);
+
+		if (size ||
+		    (i == DM_TAG_DRIVER_DATA && parent->driver_data)) {
+			stats->attach_count[i]++;
+			stats->attach_size[i] += size;
+			stats->attach_count_total++;
+			stats->attach_size_total += size;
+		}
+	}
+
+	list_for_each_entry(dev, &parent->child_head, sibling_node)
+		dev_collect_stats(stats, dev);
+}
+
+void uclass_collect_stats(struct dm_stats *stats)
+{
+	struct uclass *uc;
+
+	list_for_each_entry(uc, gd->uclass_root, sibling_node) {
+		int size;
+
+		stats->uc_count++;
+		stats->uc_size += sizeof(struct uclass);
+		size = uc->uc_drv->priv_auto;
+		if (size) {
+			stats->uc_attach_count++;
+			stats->uc_attach_size += size;
+		}
+	}
+}
+
+void dm_get_mem(struct dm_stats *stats)
+{
+	memset(stats, '\0', sizeof(*stats));
+	dev_collect_stats(stats, gd->dm_root);
+	uclass_collect_stats(stats);
+	dev_tag_collect_stats(stats);
+
+	stats->total_size = stats->dev_size + stats->uc_size +
+		stats->attach_size_total + stats->uc_attach_size +
+		stats->tag_size;
+}
+
 #ifdef CONFIG_ACPIGEN
 static int root_acpi_get_name(const struct udevice *dev, char *out_name)
 {
diff --git a/drivers/core/tag.c b/drivers/core/tag.c
index 2299919..a3c5cb7 100644
--- a/drivers/core/tag.c
+++ b/drivers/core/tag.c
@@ -6,6 +6,7 @@
 
 #include <malloc.h>
 #include <asm/global_data.h>
+#include <dm/root.h>
 #include <dm/tag.h>
 #include <linux/err.h>
 #include <linux/list.h>
@@ -15,6 +16,24 @@ struct udevice;
 
 DECLARE_GLOBAL_DATA_PTR;
 
+static const char *const tag_name[] = {
+	[DM_TAG_PLAT]		= "plat",
+	[DM_TAG_PARENT_PLAT]	= "parent_plat",
+	[DM_TAG_UC_PLAT]	= "uclass_plat",
+
+	[DM_TAG_PRIV]		= "priv",
+	[DM_TAG_PARENT_PRIV]	= "parent_priv",
+	[DM_TAG_UC_PRIV]	= "uclass_priv",
+	[DM_TAG_DRIVER_DATA]	= "driver_data",
+
+	[DM_TAG_EFI]		= "efi",
+};
+
+const char *tag_get_name(enum dm_tag_t tag)
+{
+	return tag_name[tag];
+}
+
 int dev_tag_set_ptr(struct udevice *dev, enum dm_tag_t tag, void *ptr)
 {
 	struct dmtag_node *node;
@@ -137,3 +156,13 @@ int dev_tag_del_all(struct udevice *dev)
 
 	return -ENOENT;
 }
+
+void dev_tag_collect_stats(struct dm_stats *stats)
+{
+	struct dmtag_node *node;
+
+	list_for_each_entry(node, &gd->dmtag_list, sibling) {
+		stats->tag_count++;
+		stats->tag_size += sizeof(struct dmtag_node);
+	}
+}
diff --git a/drivers/misc/qfw_sandbox.c b/drivers/misc/qfw_sandbox.c
index b09974d..1002df7 100644
--- a/drivers/misc/qfw_sandbox.c
+++ b/drivers/misc/qfw_sandbox.c
@@ -48,7 +48,7 @@ static void qfw_sandbox_read_entry_dma(struct udevice *dev, struct qfw_dma *dma)
 {
 	u16 entry;
 	u32 control = be32_to_cpu(dma->control);
-	void *address = (void *)be64_to_cpu(dma->address);
+	void *address = (void *)(uintptr_t)be64_to_cpu(dma->address);
 	u32 length = be32_to_cpu(dma->length);
 	struct qfw_sandbox_plat *plat = dev_get_plat(dev);
 	struct fw_cfg_file *file;
diff --git a/drivers/misc/test_drv.c b/drivers/misc/test_drv.c
index 5d72982..9276182 100644
--- a/drivers/misc/test_drv.c
+++ b/drivers/misc/test_drv.c
@@ -108,8 +108,10 @@ UCLASS_DRIVER(testbus) = {
 	.child_pre_probe = testbus_child_pre_probe_uclass,
 	.child_post_probe = testbus_child_post_probe_uclass,
 
-	/* This is for dtoc testing only */
-	.per_device_plat_auto   = sizeof(struct dm_test_uclass_priv),
+	.per_device_auto   = sizeof(struct dm_test_uclass_priv),
+
+	/* Note: this is for dtoc testing as well as tags*/
+	.per_device_plat_auto   = sizeof(struct dm_test_uclass_plat),
 };
 
 static int testfdt_drv_ping(struct udevice *dev, int pingval, int *pingret)
diff --git a/drivers/usb/emul/sandbox_flash.c b/drivers/usb/emul/sandbox_flash.c
index cc80f67..01b2b41 100644
--- a/drivers/usb/emul/sandbox_flash.c
+++ b/drivers/usb/emul/sandbox_flash.c
@@ -228,9 +228,9 @@ static void handle_read(struct sandbox_flash_priv *priv, ulong lba,
 			ulong transfer_len)
 {
 	debug("%s: lba=%lx, transfer_len=%lx\n", __func__, lba, transfer_len);
+	priv->read_len = transfer_len;
 	if (priv->fd != -1) {
 		os_lseek(priv->fd, lba * SANDBOX_FLASH_BLOCK_LEN, OS_SEEK_SET);
-		priv->read_len = transfer_len;
 		setup_response(priv, priv->buff,
 			       transfer_len * SANDBOX_FLASH_BLOCK_LEN);
 	} else {
@@ -336,6 +336,9 @@ static int sandbox_flash_bulk(struct udevice *dev, struct usb_device *udev,
 			if (priv->read_len) {
 				ulong bytes_read;
 
+				if (priv->fd == -1)
+					return -EIO;
+
 				bytes_read = os_read(priv->fd, buff, len);
 				if (bytes_read != len)
 					return -EIO;
diff --git a/include/binman_sym.h b/include/binman_sym.h
index 72e6765..528d7e4 100644
--- a/include/binman_sym.h
+++ b/include/binman_sym.h
@@ -11,9 +11,11 @@
 #ifndef __BINMAN_SYM_H
 #define __BINMAN_SYM_H
 
+/* BSYM in little endian, keep in sync with tools/binman/elf.py */
+#define BINMAN_SYM_MAGIC_VALUE	(0x4d595342UL)
 #define BINMAN_SYM_MISSING	(-1UL)
 
-#ifdef CONFIG_BINMAN
+#if CONFIG_IS_ENABLED(BINMAN_SYMBOLS)
 
 /**
  * binman_symname() - Internal function to get a binman symbol name
@@ -63,6 +65,37 @@
 		section(".binman_sym")))
 
 /**
+ * _binman_sym_magic - Internal magic symbol for validity checks
+ *
+ * When building images, binman fills in this symbol with the magic
+ * value #defined above. This is used to check at runtime if the
+ * symbol values were filled in and are OK to use.
+ */
+extern ulong _binman_sym_magic;
+
+/**
+ * DECLARE_BINMAN_MAGIC_SYM - Declare the internal magic symbol
+ *
+ * This macro declares the _binman_sym_magic symbol so that it exists.
+ * Declaring it here would cause errors during linking due to multiple
+ * definitions of the symbol.
+ */
+#define DECLARE_BINMAN_MAGIC_SYM \
+	ulong _binman_sym_magic \
+		__attribute__((aligned(4), section(".binman_sym")))
+
+/**
+ * BINMAN_SYMS_OK - Check if the symbol values are valid
+ *
+ * This macro checks if the magic symbol's value is filled properly,
+ * which indicates that other symbols are OK to use as well.
+ *
+ * Return: 1 if binman symbol values are usable, 0 if not
+ */
+#define BINMAN_SYMS_OK \
+	(*(ulong *)&_binman_sym_magic == BINMAN_SYM_MAGIC_VALUE)
+
+/**
  * binman_sym() - Access a previously declared symbol
  *
  * This is used to get the value of a symbol. E.g.:
@@ -72,12 +105,16 @@
  * @_type: Type f the symbol (e.g. unsigned long)
  * @entry_name: Name of the entry to look for (e.g. 'u_boot_spl')
  * @_prop_name: Property value to get from that entry (e.g. 'pos')
- * @returns value of that property (filled in by binman)
+ *
+ * Return: value of that property (filled in by binman), or
+ *	   BINMAN_SYM_MISSING if the value is unavailable
  */
 #define binman_sym(_type, _entry_name, _prop_name) \
-	(*(_type *)&binman_symname(_entry_name, _prop_name))
+	(BINMAN_SYMS_OK ? \
+	 (*(_type *)&binman_symname(_entry_name, _prop_name)) : \
+	 BINMAN_SYM_MISSING)
 
-#else /* !BINMAN */
+#else /* !CONFIG_IS_ENABLED(BINMAN_SYMBOLS) */
 
 #define binman_sym_declare(_type, _entry_name, _prop_name)
 
@@ -85,8 +122,12 @@
 
 #define binman_sym_extern(_type, _entry_name, _prop_name)
 
+#define DECLARE_BINMAN_MAGIC_SYM
+
+#define BINMAN_SYMS_OK (0)
+
 #define binman_sym(_type, _entry_name, _prop_name) BINMAN_SYM_MISSING
 
-#endif /* BINMAN */
+#endif /* CONFIG_IS_ENABLED(BINMAN_SYMBOLS) */
 
 #endif
diff --git a/include/bloblist.h b/include/bloblist.h
index d0e128a..9684bfd 100644
--- a/include/bloblist.h
+++ b/include/bloblist.h
@@ -3,8 +3,66 @@
  * This provides a standard way of passing information between boot phases
  * (TPL -> SPL -> U-Boot proper.)
  *
- * A list of blobs of data, tagged with their owner. The list resides in memory
- * and can be updated by SPL, U-Boot, etc.
+ * It consists of a list of blobs of data, tagged with their owner / contents.
+ * The list resides in memory and can be updated by SPL, U-Boot, etc.
+ *
+ * Design goals for bloblist:
+ *
+ * 1. Small and efficient structure. This avoids UUIDs or 16-byte name fields,
+ * since a 32-bit tag provides enough space for all the tags we will even need.
+ * If UUIDs are desired, they can be added inside a particular blob.
+ *
+ * 2. Avoids use of pointers, so the structure can be relocated in memory. The
+ * data in each blob is inline, rather than using pointers.
+ *
+ * 3. Bloblist is designed to start small in TPL or SPL, when only a few things
+ * are needed, like the memory size or whether console output should be enabled.
+ * Then it can grow in U-Boot proper, e.g. to include space for ACPI tables.
+ *
+ * 4. The bloblist structure is simple enough that it can be implemented in a
+ * small amount of C code. The API does not require use of strings or UUIDs,
+ * which would add to code size. For Thumb-2 the code size needed in SPL is
+ * approximately 940 bytes (e.g. for chromebook_bob).
+ *
+ * 5. Bloblist uses 16-byte alignment internally and is designed to start on a
+ * 16-byte boundary. Its headers are multiples of 16 bytes. This makes it easier
+ * to deal with data structures which need this level of alignment, such as ACPI
+ * tables. For use in SPL and TPL the alignment can be relaxed, since it can be
+ * relocated to an aligned address in U-Boot proper.
+ *
+ * 6. Bloblist is designed to be passed to Linux as reserved memory. While linux
+ * doesn't understand the bloblist header, it can be passed the indivdual blobs.
+ * For example, ACPI tables can reside in a blob and the address of those is
+ * passed to Linux, without Linux ever being away of the existence of a
+ * bloblist. Having all the blobs contiguous in memory simplifies the
+ * reserved-memory space.
+ *
+ * 7. Bloblist tags are defined in the enum below. There is an area for
+ * project-specific stuff (e.g. U-Boot, TF-A) and vendor-specific stuff, e.g.
+ * something used only on a particular SoC. There is also a private area for
+ * temporary, local use.
+ *
+ * 8. Bloblist includes a simple checksum, so that each boot phase can update
+ * this and allow the next phase to check that all is well. While the bloblist
+ * is small, this is quite cheap to calculate. When it grows (e.g. in U-Boot\
+ * proper), the CPU is likely running faster, so it is not prohibitive. Having
+ * said that, U-Boot is often the last phase that uses bloblist, so calculating
+ * the checksum there may not be necessary.
+ *
+ * 9. It would be possible to extend bloblist to support a non-contiguous
+ * structure, e.g. by creating a blob type that points to the next bloblist.
+ * This does not seem necessary for now. It adds complexity and code. We can
+ * always just copy it.
+ *
+ * 10. Bloblist is designed for simple structures, those that can be defined by
+ * a single C struct. More complex structures should be passed in a device tree.
+ * There are some exceptions, chiefly the various binary structures that Intel
+ * is fond of creating. But device tree provides a dictionary-type format which
+ * is fairly efficient (for use in U-Boot proper and Linux at least), along with
+ * a schema and a good set of tools. New formats should be designed around
+ * device tree rather than creating new binary formats, unless they are needed
+ * early in boot (where libfdt's 3KB of overhead is too large) and are trival
+ * enough to be described by a C struct.
  *
  * Copyright 2018 Google, Inc
  * Written by Simon Glass <sjg@chromium.org>
diff --git a/include/dm/device.h b/include/dm/device.h
index 5bdb106..12c6ba3 100644
--- a/include/dm/device.h
+++ b/include/dm/device.h
@@ -11,6 +11,7 @@
 #define _DM_DEVICE_H
 
 #include <dm/ofnode.h>
+#include <dm/tag.h>
 #include <dm/uclass-id.h>
 #include <fdtdec.h>
 #include <linker_lists.h>
@@ -547,6 +548,30 @@ void *dev_get_parent_priv(const struct udevice *dev);
 void *dev_get_uclass_priv(const struct udevice *dev);
 
 /**
+ * dev_get_attach_ptr() - Get the value of an attached pointed tag
+ *
+ * The tag is assumed to hold a pointer, if it exists
+ *
+ * @dev: Device to look at
+ * @tag: Tag to access
+ * @return value of tag, or NULL if there is no tag of this type
+ */
+void *dev_get_attach_ptr(const struct udevice *dev, enum dm_tag_t tag);
+
+/**
+ * dev_get_attach_size() - Get the size of an attached tag
+ *
+ * Core tags have an automatic-allocation mechanism where the allocated size is
+ * defined by the device, parent or uclass. This returns the size associated
+ * with a particular tag
+ *
+ * @dev: Device to look at
+ * @tag: Tag to access
+ * @return size of auto-allocated data, 0 if none
+ */
+int dev_get_attach_size(const struct udevice *dev, enum dm_tag_t tag);
+
+/**
  * dev_get_parent() - Get the parent of a device
  *
  * @child:	Child to check
diff --git a/include/dm/ofnode.h b/include/dm/ofnode.h
index 2c4d72d..bb60433 100644
--- a/include/dm/ofnode.h
+++ b/include/dm/ofnode.h
@@ -1182,6 +1182,33 @@ int ofnode_write_string(ofnode node, const char *propname, const char *value);
 int ofnode_set_enabled(ofnode node, bool value);
 
 /**
+ * ofnode_get_phy_node() - Get PHY node for a MAC (if not fixed-link)
+ *
+ * This function parses PHY handle from the Ethernet controller's ofnode
+ * (trying all possible PHY handle property names), and returns the PHY ofnode.
+ *
+ * Before this is used, ofnode_phy_is_fixed_link() should be checked first, and
+ * if the result to that is true, this function should not be called.
+ *
+ * @eth_node:	ofnode belonging to the Ethernet controller
+ * Return: ofnode of the PHY, if it exists, otherwise an invalid ofnode
+ */
+ofnode ofnode_get_phy_node(ofnode eth_node);
+
+/**
+ * ofnode_read_phy_mode() - Read PHY connection type from a MAC node
+ *
+ * This function parses the "phy-mode" / "phy-connection-type" property and
+ * returns the corresponding PHY interface type.
+ *
+ * @mac_node:	ofnode containing the property
+ * Return: one of PHY_INTERFACE_MODE_* constants, PHY_INTERFACE_MODE_NA on
+ *	   error
+ */
+phy_interface_t ofnode_read_phy_mode(ofnode mac_node);
+
+#if CONFIG_IS_ENABLED(DM)
+/**
  * ofnode_conf_read_bool() - Read a boolean value from the U-Boot config
  *
  * This reads a property from the /config node of the devicetree.
@@ -1218,30 +1245,21 @@ int ofnode_conf_read_int(const char *prop_name, int default_val);
  */
 const char *ofnode_conf_read_str(const char *prop_name);
 
-/**
- * ofnode_get_phy_node() - Get PHY node for a MAC (if not fixed-link)
- *
- * This function parses PHY handle from the Ethernet controller's ofnode
- * (trying all possible PHY handle property names), and returns the PHY ofnode.
- *
- * Before this is used, ofnode_phy_is_fixed_link() should be checked first, and
- * if the result to that is true, this function should not be called.
- *
- * @eth_node:	ofnode belonging to the Ethernet controller
- * Return: ofnode of the PHY, if it exists, otherwise an invalid ofnode
- */
-ofnode ofnode_get_phy_node(ofnode eth_node);
+#else /* CONFIG_DM */
+static inline bool ofnode_conf_read_bool(const char *prop_name)
+{
+	return false;
+}
 
-/**
- * ofnode_read_phy_mode() - Read PHY connection type from a MAC node
- *
- * This function parses the "phy-mode" / "phy-connection-type" property and
- * returns the corresponding PHY interface type.
- *
- * @mac_node:	ofnode containing the property
- * Return: one of PHY_INTERFACE_MODE_* constants, PHY_INTERFACE_MODE_NA on
- *	   error
- */
-phy_interface_t ofnode_read_phy_mode(ofnode mac_node);
+static inline int ofnode_conf_read_int(const char *prop_name, int default_val)
+{
+	return default_val;
+}
+
+static inline const char *ofnode_conf_read_str(const char *prop_name)
+{
+	return NULL;
+}
+#endif /* CONFIG_DM */
 
 #endif
diff --git a/include/dm/root.h b/include/dm/root.h
index e888fb9..b2f30a8 100644
--- a/include/dm/root.h
+++ b/include/dm/root.h
@@ -9,12 +9,50 @@
 #ifndef _DM_ROOT_H_
 #define _DM_ROOT_H_
 
+#include <dm/tag.h>
+
 struct udevice;
 
 /* Head of the uclass list if CONFIG_OF_PLATDATA_INST is enabled */
 extern struct list_head uclass_head;
 
 /**
+ * struct dm_stats - Information about driver model memory usage
+ *
+ * @total_size: All data
+ * @dev_count: Number of devices
+ * @dev_size: Size of all devices (just the struct udevice)
+ * @dev_name_size: Bytes used by device names
+ * @uc_count: Number of uclasses
+ * @uc_size: Size of all uclasses (just the struct uclass)
+ * @tag_count: Number of tags
+ * @tag_size: Bytes used by all tags
+ * @uc_attach_count: Number of uclasses with attached data (priv)
+ * @uc_attach_size: Total size of that attached data
+ * @attach_count_total: Total number of attached data items for all udevices and
+ *	uclasses
+ * @attach_size_total: Total number of bytes of attached data
+ * @attach_count: Number of devices with attached, for each type
+ * @attach_size: Total number of bytes of attached data, for each type
+ */
+struct dm_stats {
+	int total_size;
+	int dev_count;
+	int dev_size;
+	int dev_name_size;
+	int uc_count;
+	int uc_size;
+	int tag_count;
+	int tag_size;
+	int uc_attach_count;
+	int uc_attach_size;
+	int attach_count_total;
+	int attach_size_total;
+	int attach_count[DM_TAG_ATTACH_COUNT];
+	int attach_size[DM_TAG_ATTACH_COUNT];
+};
+
+/**
  * dm_root() - Return pointer to the top of the driver tree
  *
  * This function returns pointer to the root node of the driver tree,
@@ -141,4 +179,11 @@ static inline int dm_remove_devices_flags(uint flags) { return 0; }
  */
 void dm_get_stats(int *device_countp, int *uclass_countp);
 
+/**
+ * dm_get_mem() - Get stats on memory usage in driver model
+ *
+ * @stats: Place to put the information
+ */
+void dm_get_mem(struct dm_stats *stats);
+
 #endif
diff --git a/include/dm/tag.h b/include/dm/tag.h
index 54fc31e..745088f 100644
--- a/include/dm/tag.h
+++ b/include/dm/tag.h
@@ -10,11 +10,23 @@
 #include <linux/list.h>
 #include <linux/types.h>
 
+struct dm_stats;
 struct udevice;
 
 enum dm_tag_t {
+	/* Types of core tags that can be attached to devices */
+	DM_TAG_PLAT,
+	DM_TAG_PARENT_PLAT,
+	DM_TAG_UC_PLAT,
+
+	DM_TAG_PRIV,
+	DM_TAG_PARENT_PRIV,
+	DM_TAG_UC_PRIV,
+	DM_TAG_DRIVER_DATA,
+	DM_TAG_ATTACH_COUNT,
+
 	/* EFI_LOADER */
-	DM_TAG_EFI = 0,
+	DM_TAG_EFI = DM_TAG_ATTACH_COUNT,
 
 	DM_TAG_COUNT,
 };
@@ -107,4 +119,22 @@ int dev_tag_del(struct udevice *dev, enum dm_tag_t tag);
  */
 int dev_tag_del_all(struct udevice *dev);
 
+/**
+ * dev_tag_collect_stats() - Collect information on driver model performance
+ *
+ * This collects information on how driver model is performing. For now it only
+ * includes memory usage
+ *
+ * @stats: Place to put the collected information
+ */
+void dev_tag_collect_stats(struct dm_stats *stats);
+
+/**
+ * tag_get_name() - Get the name of a tag
+ *
+ * @tag: Tag to look up, which must be valid
+ * Returns: Name of tag
+ */
+const char *tag_get_name(enum dm_tag_t tag);
+
 #endif /* _DM_TAG_H */
diff --git a/include/dm/test.h b/include/dm/test.h
index 4919064..b593750 100644
--- a/include/dm/test.h
+++ b/include/dm/test.h
@@ -93,6 +93,13 @@ struct dm_test_uclass_priv {
 };
 
 /**
+ * struct dm_test_uclass_plat - private plat data for test uclass
+ */
+struct dm_test_uclass_plat {
+	char dummy[32];
+};
+
+/**
  * struct dm_test_parent_data - parent's information on each child
  *
  * @sum: Test value used to check parent data works correctly
diff --git a/include/dm/util.h b/include/dm/util.h
index 4428f04..e10c606 100644
--- a/include/dm/util.h
+++ b/include/dm/util.h
@@ -6,6 +6,8 @@
 #ifndef __DM_UTIL_H
 #define __DM_UTIL_H
 
+struct dm_stats;
+
 #if CONFIG_IS_ENABLED(DM_WARN)
 #define dm_warn(fmt...) log(LOGC_DM, LOGL_WARNING, ##fmt)
 #else
@@ -25,7 +27,7 @@ struct list_head;
 int list_count_items(struct list_head *head);
 
 /* Dump out a tree of all devices */
-void dm_dump_all(void);
+void dm_dump_tree(void);
 
 /* Dump out a list of uclasses and their devices */
 void dm_dump_uclass(void);
@@ -48,6 +50,13 @@ void dm_dump_driver_compat(void);
 /* Dump out a list of drivers with static platform data */
 void dm_dump_static_driver_info(void);
 
+/**
+ * dm_dump_mem() - Dump stats on memory usage in driver model
+ *
+ * @mem: Stats to dump
+ */
+void dm_dump_mem(struct dm_stats *stats);
+
 #if CONFIG_IS_ENABLED(OF_PLATDATA_INST) && CONFIG_IS_ENABLED(READ_ONLY)
 void *dm_priv_to_rw(void *priv);
 #else
diff --git a/include/os.h b/include/os.h
index 10e198c..1481787 100644
--- a/include/os.h
+++ b/include/os.h
@@ -17,6 +17,13 @@ struct rtc_time;
 struct sandbox_state;
 
 /**
+ * os_printf() - print directly to OS console
+ *
+ * @format: format string
+ */
+int os_printf(const char *format, ...);
+
+/**
  * Access to the OS read() system call
  *
  * @fd:		File descriptor as returned by os_open()
diff --git a/include/spl.h b/include/spl.h
index cc78bc3..aac6648 100644
--- a/include/spl.h
+++ b/include/spl.h
@@ -288,6 +288,8 @@ binman_sym_extern(ulong, u_boot_any, image_pos);
 binman_sym_extern(ulong, u_boot_any, size);
 binman_sym_extern(ulong, u_boot_spl, image_pos);
 binman_sym_extern(ulong, u_boot_spl, size);
+binman_sym_extern(ulong, u_boot_vpl, image_pos);
+binman_sym_extern(ulong, u_boot_vpl, size);
 
 /**
  * spl_get_image_pos() - get the image position of the next phase
diff --git a/test/dm/core.c b/test/dm/core.c
index ebd5044..fd4d756 100644
--- a/test/dm/core.c
+++ b/test/dm/core.c
@@ -1275,3 +1275,94 @@ static int dm_test_uclass_find_device(struct unit_test_state *uts)
 	return 0;
 }
 DM_TEST(dm_test_uclass_find_device, UT_TESTF_SCAN_FDT);
+
+/* Test getting information about tags attached to devices */
+static int dm_test_dev_get_attach(struct unit_test_state *uts)
+{
+	struct udevice *dev;
+
+	ut_assertok(uclass_first_device_err(UCLASS_TEST_FDT, &dev));
+	ut_asserteq_str("a-test", dev->name);
+
+	ut_assertnonnull(dev_get_attach_ptr(dev, DM_TAG_PLAT));
+	ut_assertnonnull(dev_get_attach_ptr(dev, DM_TAG_PRIV));
+	ut_assertnull(dev_get_attach_ptr(dev, DM_TAG_UC_PRIV));
+	ut_assertnull(dev_get_attach_ptr(dev, DM_TAG_UC_PLAT));
+	ut_assertnull(dev_get_attach_ptr(dev, DM_TAG_PARENT_PLAT));
+	ut_assertnull(dev_get_attach_ptr(dev, DM_TAG_PARENT_PRIV));
+
+	ut_asserteq(sizeof(struct dm_test_pdata),
+		    dev_get_attach_size(dev, DM_TAG_PLAT));
+	ut_asserteq(sizeof(struct dm_test_priv),
+		    dev_get_attach_size(dev, DM_TAG_PRIV));
+	ut_asserteq(0, dev_get_attach_size(dev, DM_TAG_UC_PRIV));
+	ut_asserteq(0, dev_get_attach_size(dev, DM_TAG_UC_PLAT));
+	ut_asserteq(0, dev_get_attach_size(dev, DM_TAG_PARENT_PLAT));
+	ut_asserteq(0, dev_get_attach_size(dev, DM_TAG_PARENT_PRIV));
+
+	return 0;
+}
+DM_TEST(dm_test_dev_get_attach, UT_TESTF_SCAN_FDT);
+
+/* Test getting information about tags attached to bus devices */
+static int dm_test_dev_get_attach_bus(struct unit_test_state *uts)
+{
+	struct udevice *dev, *child;
+
+	ut_assertok(uclass_first_device_err(UCLASS_TEST_BUS, &dev));
+	ut_asserteq_str("some-bus", dev->name);
+
+	ut_assertnonnull(dev_get_attach_ptr(dev, DM_TAG_PLAT));
+	ut_assertnonnull(dev_get_attach_ptr(dev, DM_TAG_PRIV));
+	ut_assertnonnull(dev_get_attach_ptr(dev, DM_TAG_UC_PRIV));
+	ut_assertnonnull(dev_get_attach_ptr(dev, DM_TAG_UC_PLAT));
+	ut_assertnull(dev_get_attach_ptr(dev, DM_TAG_PARENT_PLAT));
+	ut_assertnull(dev_get_attach_ptr(dev, DM_TAG_PARENT_PRIV));
+
+	ut_asserteq(sizeof(struct dm_test_pdata),
+		    dev_get_attach_size(dev, DM_TAG_PLAT));
+	ut_asserteq(sizeof(struct dm_test_priv),
+		    dev_get_attach_size(dev, DM_TAG_PRIV));
+	ut_asserteq(sizeof(struct dm_test_uclass_priv),
+		    dev_get_attach_size(dev, DM_TAG_UC_PRIV));
+	ut_asserteq(sizeof(struct dm_test_uclass_plat),
+		    dev_get_attach_size(dev, DM_TAG_UC_PLAT));
+	ut_asserteq(0, dev_get_attach_size(dev, DM_TAG_PARENT_PLAT));
+	ut_asserteq(0, dev_get_attach_size(dev, DM_TAG_PARENT_PRIV));
+
+	/* Now try the child of the bus */
+	ut_assertok(device_first_child_err(dev, &child));
+	ut_asserteq_str("c-test@5", child->name);
+
+	ut_assertnonnull(dev_get_attach_ptr(child, DM_TAG_PLAT));
+	ut_assertnonnull(dev_get_attach_ptr(child, DM_TAG_PRIV));
+	ut_assertnull(dev_get_attach_ptr(child, DM_TAG_UC_PRIV));
+	ut_assertnull(dev_get_attach_ptr(child, DM_TAG_UC_PLAT));
+	ut_assertnonnull(dev_get_attach_ptr(child, DM_TAG_PARENT_PLAT));
+	ut_assertnonnull(dev_get_attach_ptr(child, DM_TAG_PARENT_PRIV));
+
+	ut_asserteq(sizeof(struct dm_test_pdata),
+		    dev_get_attach_size(child, DM_TAG_PLAT));
+	ut_asserteq(sizeof(struct dm_test_priv),
+		    dev_get_attach_size(child, DM_TAG_PRIV));
+	ut_asserteq(0, dev_get_attach_size(child, DM_TAG_UC_PRIV));
+	ut_asserteq(0, dev_get_attach_size(child, DM_TAG_UC_PLAT));
+	ut_asserteq(sizeof(struct dm_test_parent_plat),
+		    dev_get_attach_size(child, DM_TAG_PARENT_PLAT));
+	ut_asserteq(sizeof(struct dm_test_parent_data),
+		    dev_get_attach_size(child, DM_TAG_PARENT_PRIV));
+
+	return 0;
+}
+DM_TEST(dm_test_dev_get_attach_bus, UT_TESTF_SCAN_FDT);
+
+/* Test getting information about tags attached to bus devices */
+static int dm_test_dev_get_mem(struct unit_test_state *uts)
+{
+	struct dm_stats stats;
+
+	dm_get_mem(&stats);
+
+	return 0;
+}
+DM_TEST(dm_test_dev_get_mem, UT_TESTF_SCAN_FDT);
diff --git a/test/py/tests/test_bind.py b/test/py/tests/test_bind.py
index 8ad277d..d7e6626 100644
--- a/test/py/tests/test_bind.py
+++ b/test/py/tests/test_bind.py
@@ -1,186 +1,191 @@
 # SPDX-License-Identifier: GPL-2.0
 # Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
 
-import os.path
-import pytest
+""" Test for bind command """
+
 import re
+import pytest
 
 def in_tree(response, name, uclass, drv, depth, last_child):
-	lines = [x.strip() for x in response.splitlines()]
-	leaf = ''
-	if depth != 0:
-		leaf = '   ' + '    ' * (depth - 1) ;
-		if not last_child:
-			leaf = leaf + r'\|'
-		else:
-                        leaf = leaf + '`'
-
-	leaf = leaf + '-- ' + name
-	line = (r' *{:10.10} *[0-9]*  \[ [ +] \]   {:20.20}  [` |]{}$'
-	        .format(uclass, drv, leaf))
-	prog = re.compile(line)
-	for l in lines:
-		if prog.match(l):
-			return True
-	return False
+    lines = [x.strip() for x in response.splitlines()]
+    leaf = ''
+    if depth != 0:
+        leaf = '   ' + '    ' * (depth - 1)
+        if not last_child:
+            leaf = leaf + r'\|'
+        else:
+            leaf = leaf + '`'
+
+    leaf = leaf + '-- ' + name
+    line = (r' *{:10.10} *[0-9]*  \[ [ +] \]   {:20.20}  [` |]{}$'
+            .format(uclass, drv, leaf))
+    prog = re.compile(line)
+    for l in lines:
+        if prog.match(l):
+            return True
+    return False
 
 
 @pytest.mark.buildconfigspec('cmd_bind')
 def test_bind_unbind_with_node(u_boot_console):
 
-	tree = u_boot_console.run_command('dm tree')
-	assert in_tree(tree, 'bind-test', 'simple_bus', 'simple_bus', 0, True)
-	assert in_tree(tree, 'bind-test-child1', 'phy', 'phy_sandbox', 1, False)
-	assert in_tree(tree, 'bind-test-child2', 'simple_bus', 'simple_bus', 1, True)
-
-	#bind usb_ether driver (which has no compatible) to usb@1 node.
-	##New entry usb_ether should appear in the dm tree
-	response = u_boot_console.run_command('bind  /usb@1 usb_ether')
-	assert response == ''
-	tree = u_boot_console.run_command('dm tree')
-	assert in_tree(tree, 'usb@1', 'ethernet', 'usb_ether', 1, True)
-
-	#Unbind child #1. No error expected and all devices should be there except for bind-test-child1
-	response = u_boot_console.run_command('unbind  /bind-test/bind-test-child1')
-	assert response == ''
-	tree = u_boot_console.run_command('dm tree')
-	assert in_tree(tree, 'bind-test', 'simple_bus', 'simple_bus', 0, True)
-	assert 'bind-test-child1' not in tree
-	assert in_tree(tree, 'bind-test-child2', 'simple_bus', 'simple_bus', 1, True)
-
-	#bind child #1. No error expected and all devices should be there
-	response = u_boot_console.run_command('bind  /bind-test/bind-test-child1 phy_sandbox')
-	assert response == ''
-	tree = u_boot_console.run_command('dm tree')
-	assert in_tree(tree, 'bind-test', 'simple_bus', 'simple_bus', 0, True)
-	assert in_tree(tree, 'bind-test-child1', 'phy', 'phy_sandbox', 1, True)
-	assert in_tree(tree, 'bind-test-child2', 'simple_bus', 'simple_bus', 1, False)
-
-	#Unbind child #2. No error expected and all devices should be there except for bind-test-child2
-	response = u_boot_console.run_command('unbind  /bind-test/bind-test-child2')
-	assert response == ''
-	tree = u_boot_console.run_command('dm tree')
-	assert in_tree(tree, 'bind-test', 'simple_bus', 'simple_bus', 0, True)
-	assert in_tree(tree, 'bind-test-child1', 'phy', 'phy_sandbox', 1, True)
-	assert 'bind-test-child2' not in tree
-
-
-	#Bind child #2. No error expected and all devices should be there
-	response = u_boot_console.run_command('bind /bind-test/bind-test-child2 simple_bus')
-	assert response == ''
-	tree = u_boot_console.run_command('dm tree')
-	assert in_tree(tree, 'bind-test', 'simple_bus', 'simple_bus', 0, True)
-	assert in_tree(tree, 'bind-test-child1', 'phy', 'phy_sandbox', 1, False)
-	assert in_tree(tree, 'bind-test-child2', 'simple_bus', 'simple_bus', 1, True)
-
-	#Unbind parent. No error expected. All devices should be removed and unbound
-	response = u_boot_console.run_command('unbind  /bind-test')
-	assert response == ''
-	tree = u_boot_console.run_command('dm tree')
-	assert 'bind-test' not in tree
-	assert 'bind-test-child1' not in tree
-	assert 'bind-test-child2' not in tree
-
-	#try binding invalid node with valid driver
-	response = u_boot_console.run_command('bind  /not-a-valid-node simple_bus')
-	assert response != ''
-	tree = u_boot_console.run_command('dm tree')
-	assert 'not-a-valid-node' not in tree
-
-	#try binding valid node with invalid driver
-	response = u_boot_console.run_command('bind  /bind-test not_a_driver')
-	assert response != ''
-	tree = u_boot_console.run_command('dm tree')
-	assert 'bind-test' not in tree
-
-	#bind /bind-test. Device should come up as well as its children
-	response = u_boot_console.run_command('bind  /bind-test simple_bus')
-	assert response == ''
-	tree = u_boot_console.run_command('dm tree')
-	assert in_tree(tree, 'bind-test', 'simple_bus', 'simple_bus', 0, True)
-	assert in_tree(tree, 'bind-test-child1', 'phy', 'phy_sandbox', 1, False)
-	assert in_tree(tree, 'bind-test-child2', 'simple_bus', 'simple_bus', 1, True)
-
-	response = u_boot_console.run_command('unbind  /bind-test')
-	assert response == ''
+    tree = u_boot_console.run_command('dm tree')
+    assert in_tree(tree, 'bind-test', 'simple_bus', 'simple_bus', 0, True)
+    assert in_tree(tree, 'bind-test-child1', 'phy', 'phy_sandbox', 1, False)
+    assert in_tree(tree, 'bind-test-child2', 'simple_bus', 'simple_bus', 1, True)
+
+    #bind usb_ether driver (which has no compatible) to usb@1 node.
+    ##New entry usb_ether should appear in the dm tree
+    response = u_boot_console.run_command('bind  /usb@1 usb_ether')
+    assert response == ''
+    tree = u_boot_console.run_command('dm tree')
+    assert in_tree(tree, 'usb@1', 'ethernet', 'usb_ether', 1, True)
+
+    #Unbind child #1. No error expected and all devices should be there except for bind-test-child1
+    response = u_boot_console.run_command('unbind  /bind-test/bind-test-child1')
+    assert response == ''
+    tree = u_boot_console.run_command('dm tree')
+    assert in_tree(tree, 'bind-test', 'simple_bus', 'simple_bus', 0, True)
+    assert 'bind-test-child1' not in tree
+    assert in_tree(tree, 'bind-test-child2', 'simple_bus', 'simple_bus', 1, True)
+
+    #bind child #1. No error expected and all devices should be there
+    response = u_boot_console.run_command('bind  /bind-test/bind-test-child1 phy_sandbox')
+    assert response == ''
+    tree = u_boot_console.run_command('dm tree')
+    assert in_tree(tree, 'bind-test', 'simple_bus', 'simple_bus', 0, True)
+    assert in_tree(tree, 'bind-test-child1', 'phy', 'phy_sandbox', 1, True)
+    assert in_tree(tree, 'bind-test-child2', 'simple_bus', 'simple_bus', 1, False)
+
+    #Unbind child #2. No error expected and all devices should be there except for bind-test-child2
+    response = u_boot_console.run_command('unbind  /bind-test/bind-test-child2')
+    assert response == ''
+    tree = u_boot_console.run_command('dm tree')
+    assert in_tree(tree, 'bind-test', 'simple_bus', 'simple_bus', 0, True)
+    assert in_tree(tree, 'bind-test-child1', 'phy', 'phy_sandbox', 1, True)
+    assert 'bind-test-child2' not in tree
+
+
+    #Bind child #2. No error expected and all devices should be there
+    response = u_boot_console.run_command('bind /bind-test/bind-test-child2 simple_bus')
+    assert response == ''
+    tree = u_boot_console.run_command('dm tree')
+    assert in_tree(tree, 'bind-test', 'simple_bus', 'simple_bus', 0, True)
+    assert in_tree(tree, 'bind-test-child1', 'phy', 'phy_sandbox', 1, False)
+    assert in_tree(tree, 'bind-test-child2', 'simple_bus', 'simple_bus', 1, True)
+
+    #Unbind parent. No error expected. All devices should be removed and unbound
+    response = u_boot_console.run_command('unbind  /bind-test')
+    assert response == ''
+    tree = u_boot_console.run_command('dm tree')
+    assert 'bind-test' not in tree
+    assert 'bind-test-child1' not in tree
+    assert 'bind-test-child2' not in tree
+
+    #try binding invalid node with valid driver
+    response = u_boot_console.run_command('bind  /not-a-valid-node simple_bus')
+    assert response != ''
+    tree = u_boot_console.run_command('dm tree')
+    assert 'not-a-valid-node' not in tree
+
+    #try binding valid node with invalid driver
+    response = u_boot_console.run_command('bind  /bind-test not_a_driver')
+    assert response != ''
+    tree = u_boot_console.run_command('dm tree')
+    assert 'bind-test' not in tree
+
+    #bind /bind-test. Device should come up as well as its children
+    response = u_boot_console.run_command('bind  /bind-test simple_bus')
+    assert response == ''
+    tree = u_boot_console.run_command('dm tree')
+    assert in_tree(tree, 'bind-test', 'simple_bus', 'simple_bus', 0, True)
+    assert in_tree(tree, 'bind-test-child1', 'phy', 'phy_sandbox', 1, False)
+    assert in_tree(tree, 'bind-test-child2', 'simple_bus', 'simple_bus', 1, True)
+
+    response = u_boot_console.run_command('unbind  /bind-test')
+    assert response == ''
 
 def get_next_line(tree, name):
-	treelines = [x.strip() for x in tree.splitlines() if x.strip()]
-	child_line = ''
-	for idx, line in enumerate(treelines):
-		if ('-- ' + name) in line:
-			try:
-				child_line = treelines[idx+1]
-			except:
-				pass
-			break
-	return child_line
+    treelines = [x.strip() for x in tree.splitlines() if x.strip()]
+    child_line = ''
+    for idx, line in enumerate(treelines):
+        if '-- ' + name in line:
+            try:
+                child_line = treelines[idx+1]
+            except:
+                pass
+            break
+    return child_line
 
 @pytest.mark.buildconfigspec('cmd_bind')
 def test_bind_unbind_with_uclass(u_boot_console):
-	#bind /bind-test
-	response = u_boot_console.run_command('bind  /bind-test simple_bus')
-	assert response == ''
-
-	#make sure bind-test-child2 is there and get its uclass/index pair
-	tree = u_boot_console.run_command('dm tree')
-	child2_line = [x.strip() for x in tree.splitlines() if '-- bind-test-child2' in x]
-	assert len(child2_line) == 1
-
-	child2_uclass = child2_line[0].split()[0]
-	child2_index = int(child2_line[0].split()[1])
-
-	#bind simple_bus as a child of bind-test-child2
-	response = u_boot_console.run_command('bind  {} {} simple_bus'.format(child2_uclass, child2_index))
-
-	#check that the child is there and its uclass/index pair is right
-	tree = u_boot_console.run_command('dm tree')
-
-	child_of_child2_line = get_next_line(tree, 'bind-test-child2')
-	assert child_of_child2_line
-	child_of_child2_index = int(child_of_child2_line.split()[1])
-	assert in_tree(tree, 'simple_bus', 'simple_bus', 'simple_bus', 2, True)
-	assert child_of_child2_index == child2_index + 1
-
-	#unbind the child and check it has been removed
-	response = u_boot_console.run_command('unbind  simple_bus {}'.format(child_of_child2_index))
-	assert response == ''
-	tree = u_boot_console.run_command('dm tree')
-	assert in_tree(tree, 'bind-test-child2', 'simple_bus', 'simple_bus', 1, True)
-	assert not in_tree(tree, 'simple_bus', 'simple_bus', 'simple_bus', 2, True)
-	child_of_child2_line = get_next_line(tree, 'bind-test-child2')
-	assert child_of_child2_line == ''
-
-	#bind simple_bus as a child of bind-test-child2
-	response = u_boot_console.run_command('bind  {} {} simple_bus'.format(child2_uclass, child2_index))
-
-	#check that the child is there and its uclass/index pair is right
-	tree = u_boot_console.run_command('dm tree')
-	treelines = [x.strip() for x in tree.splitlines() if x.strip()]
-
-	child_of_child2_line = get_next_line(tree, 'bind-test-child2')
-	assert child_of_child2_line
-	child_of_child2_index = int(child_of_child2_line.split()[1])
-	assert in_tree(tree, 'simple_bus', 'simple_bus', 'simple_bus', 2, True)
-	assert child_of_child2_index == child2_index + 1
-
-	#unbind the child and check it has been removed
-	response = u_boot_console.run_command('unbind  {} {} simple_bus'.format(child2_uclass, child2_index))
-	assert response == ''
-
-	tree = u_boot_console.run_command('dm tree')
-	assert in_tree(tree, 'bind-test-child2', 'simple_bus', 'simple_bus', 1, True)
-
-	child_of_child2_line = get_next_line(tree, 'bind-test-child2')
-	assert child_of_child2_line == ''
-
-	#unbind the child again and check it doesn't change the tree
-	tree_old = u_boot_console.run_command('dm tree')
-	response = u_boot_console.run_command('unbind  {} {} simple_bus'.format(child2_uclass, child2_index))
-	tree_new = u_boot_console.run_command('dm tree')
-
-	assert response == ''
-	assert tree_old == tree_new
-
-	response = u_boot_console.run_command('unbind  /bind-test')
-	assert response == ''
+    #bind /bind-test
+    response = u_boot_console.run_command('bind  /bind-test simple_bus')
+    assert response == ''
+
+    #make sure bind-test-child2 is there and get its uclass/index pair
+    tree = u_boot_console.run_command('dm tree')
+    child2_line = [x.strip() for x in tree.splitlines() if '-- bind-test-child2' in x]
+    assert len(child2_line) == 1
+
+    child2_uclass = child2_line[0].split()[0]
+    child2_index = int(child2_line[0].split()[1])
+
+    #bind simple_bus as a child of bind-test-child2
+    response = u_boot_console.run_command(
+                    'bind  {} {} simple_bus'.format(child2_uclass, child2_index))
+
+    #check that the child is there and its uclass/index pair is right
+    tree = u_boot_console.run_command('dm tree')
+
+    child_of_child2_line = get_next_line(tree, 'bind-test-child2')
+    assert child_of_child2_line
+    child_of_child2_index = int(child_of_child2_line.split()[1])
+    assert in_tree(tree, 'simple_bus', 'simple_bus', 'simple_bus', 2, True)
+    assert child_of_child2_index == child2_index + 1
+
+    #unbind the child and check it has been removed
+    response = u_boot_console.run_command('unbind  simple_bus {}'.format(child_of_child2_index))
+    assert response == ''
+    tree = u_boot_console.run_command('dm tree')
+    assert in_tree(tree, 'bind-test-child2', 'simple_bus', 'simple_bus', 1, True)
+    assert not in_tree(tree, 'simple_bus', 'simple_bus', 'simple_bus', 2, True)
+    child_of_child2_line = get_next_line(tree, 'bind-test-child2')
+    assert child_of_child2_line == ''
+
+    #bind simple_bus as a child of bind-test-child2
+    response = u_boot_console.run_command(
+                    'bind  {} {} simple_bus'.format(child2_uclass, child2_index))
+
+    #check that the child is there and its uclass/index pair is right
+    tree = u_boot_console.run_command('dm tree')
+    treelines = [x.strip() for x in tree.splitlines() if x.strip()]
+
+    child_of_child2_line = get_next_line(tree, 'bind-test-child2')
+    assert child_of_child2_line
+    child_of_child2_index = int(child_of_child2_line.split()[1])
+    assert in_tree(tree, 'simple_bus', 'simple_bus', 'simple_bus', 2, True)
+    assert child_of_child2_index == child2_index + 1
+
+    #unbind the child and check it has been removed
+    response = u_boot_console.run_command(
+                    'unbind  {} {} simple_bus'.format(child2_uclass, child2_index))
+    assert response == ''
+
+    tree = u_boot_console.run_command('dm tree')
+    assert in_tree(tree, 'bind-test-child2', 'simple_bus', 'simple_bus', 1, True)
+
+    child_of_child2_line = get_next_line(tree, 'bind-test-child2')
+    assert child_of_child2_line == ''
+
+    #unbind the child again and check it doesn't change the tree
+    tree_old = u_boot_console.run_command('dm tree')
+    response = u_boot_console.run_command(
+                    'unbind  {} {} simple_bus'.format(child2_uclass, child2_index))
+    tree_new = u_boot_console.run_command('dm tree')
+
+    assert response == ''
+    assert tree_old == tree_new
+
+    response = u_boot_console.run_command('unbind  /bind-test')
+    assert response == ''
diff --git a/tools/binman/elf.py b/tools/binman/elf.py
index afa05e5..6d440dd 100644
--- a/tools/binman/elf.py
+++ b/tools/binman/elf.py
@@ -25,6 +25,9 @@ try:
 except:  # pragma: no cover
     ELF_TOOLS = False
 
+# BSYM in little endian, keep in sync with include/binman_sym.h
+BINMAN_SYM_MAGIC_VALUE = 0x4d595342
+
 # Information about an EFL symbol:
 # section (str): Name of the section containing this symbol
 # address (int): Address of the symbol (its value)
@@ -223,9 +226,12 @@ def LookupAndWriteSymbols(elf_fname, entry, section):
                 raise ValueError('%s has size %d: only 4 and 8 are supported' %
                                  (msg, sym.size))
 
-            # Look up the symbol in our entry tables.
-            value = section.GetImage().LookupImageSymbol(name, sym.weak, msg,
-                                                         base.address)
+            if name == '_binman_sym_magic':
+                value = BINMAN_SYM_MAGIC_VALUE
+            else:
+                # Look up the symbol in our entry tables.
+                value = section.GetImage().LookupImageSymbol(name, sym.weak,
+                                                             msg, base.address)
             if value is None:
                 value = -1
                 pack_string = pack_string.lower()
diff --git a/tools/binman/elf_test.py b/tools/binman/elf_test.py
index 02bc108..5a51c64 100644
--- a/tools/binman/elf_test.py
+++ b/tools/binman/elf_test.py
@@ -127,7 +127,7 @@ class TestElf(unittest.TestCase):
         elf_fname = self.ElfTestFile('u_boot_binman_syms')
         with self.assertRaises(ValueError) as e:
             elf.LookupAndWriteSymbols(elf_fname, entry, section)
-        self.assertIn('entry_path has offset 4 (size 8) but the contents size '
+        self.assertIn('entry_path has offset 8 (size 8) but the contents size '
                       'is a', str(e.exception))
 
     def testMissingImageStart(self):
@@ -161,18 +161,20 @@ class TestElf(unittest.TestCase):
         This should produce -1 values for all thress symbols, taking up the
         first 16 bytes of the image.
         """
-        entry = FakeEntry(24)
+        entry = FakeEntry(28)
         section = FakeSection(sym_value=None)
         elf_fname = self.ElfTestFile('u_boot_binman_syms')
         elf.LookupAndWriteSymbols(elf_fname, entry, section)
-        self.assertEqual(tools.get_bytes(255, 20) + tools.get_bytes(ord('a'), 4),
-                                                                  entry.data)
+        expected = (struct.pack('<L', elf.BINMAN_SYM_MAGIC_VALUE) +
+                    tools.get_bytes(255, 20) +
+                    tools.get_bytes(ord('a'), 4))
+        self.assertEqual(expected, entry.data)
 
     def testDebug(self):
         """Check that enabling debug in the elf module produced debug output"""
         try:
             tout.init(tout.DEBUG)
-            entry = FakeEntry(20)
+            entry = FakeEntry(24)
             section = FakeSection()
             elf_fname = self.ElfTestFile('u_boot_binman_syms')
             with test_util.capture_sys_output() as (stdout, stderr):
diff --git a/tools/binman/ftest.py b/tools/binman/ftest.py
index b5cf549..fa1f421 100644
--- a/tools/binman/ftest.py
+++ b/tools/binman/ftest.py
@@ -43,8 +43,8 @@ from patman import tout
 # Contents of test files, corresponding to different entry types
 U_BOOT_DATA           = b'1234'
 U_BOOT_IMG_DATA       = b'img'
-U_BOOT_SPL_DATA       = b'56780123456789abcdefghi'
-U_BOOT_TPL_DATA       = b'tpl9876543210fedcbazyw'
+U_BOOT_SPL_DATA       = b'56780123456789abcdefghijklm'
+U_BOOT_TPL_DATA       = b'tpl9876543210fedcbazywvuts'
 BLOB_DATA             = b'89'
 ME_DATA               = b'0abcd'
 VGA_DATA              = b'vga'
@@ -1406,8 +1406,9 @@ class TestFunctional(unittest.TestCase):
         elf_fname = self.ElfTestFile('u_boot_binman_syms')
         syms = elf.GetSymbols(elf_fname, ['binman', 'image'])
         addr = elf.GetSymbolAddress(elf_fname, '__image_copy_start')
+        self.assertEqual(syms['_binman_sym_magic'].address, addr)
         self.assertEqual(syms['_binman_u_boot_spl_any_prop_offset'].address,
-                         addr)
+                         addr + 4)
 
         self._SetupSplElf('u_boot_binman_syms')
         data = self._DoReadFileDtb(dts, entry_args=entry_args,
@@ -1415,17 +1416,17 @@ class TestFunctional(unittest.TestCase):
         # The image should contain the symbols from u_boot_binman_syms.c
         # Note that image_pos is adjusted by the base address of the image,
         # which is 0x10 in our test image
-        sym_values = struct.pack('<LQLL', 0x00,
-                                 u_boot_offset + len(U_BOOT_DATA),
+        sym_values = struct.pack('<LLQLL', elf.BINMAN_SYM_MAGIC_VALUE,
+                                 0x00, u_boot_offset + len(U_BOOT_DATA),
                                  0x10 + u_boot_offset, 0x04)
-        expected = (sym_values + base_data[20:] +
+        expected = (sym_values + base_data[24:] +
                     tools.get_bytes(0xff, 1) + U_BOOT_DATA + sym_values +
-                    base_data[20:])
+                    base_data[24:])
         self.assertEqual(expected, data)
 
     def testSymbols(self):
         """Test binman can assign symbols embedded in U-Boot"""
-        self.checkSymbols('053_symbols.dts', U_BOOT_SPL_DATA, 0x18)
+        self.checkSymbols('053_symbols.dts', U_BOOT_SPL_DATA, 0x1c)
 
     def testSymbolsNoDtb(self):
         """Test binman can assign symbols embedded in U-Boot SPL"""
@@ -3610,20 +3611,20 @@ class TestFunctional(unittest.TestCase):
 
     def _CheckSymbolsTplSection(self, dts, expected_vals):
         data = self._DoReadFile(dts)
-        sym_values = struct.pack('<LQLL', *expected_vals)
+        sym_values = struct.pack('<LLQLL', elf.BINMAN_SYM_MAGIC_VALUE, *expected_vals)
         upto1 = 4 + len(U_BOOT_SPL_DATA)
-        expected1 = tools.get_bytes(0xff, 4) + sym_values + U_BOOT_SPL_DATA[20:]
+        expected1 = tools.get_bytes(0xff, 4) + sym_values + U_BOOT_SPL_DATA[24:]
         self.assertEqual(expected1, data[:upto1])
 
         upto2 = upto1 + 1 + len(U_BOOT_SPL_DATA)
-        expected2 = tools.get_bytes(0xff, 1) + sym_values + U_BOOT_SPL_DATA[20:]
+        expected2 = tools.get_bytes(0xff, 1) + sym_values + U_BOOT_SPL_DATA[24:]
         self.assertEqual(expected2, data[upto1:upto2])
 
-        upto3 = 0x34 + len(U_BOOT_DATA)
+        upto3 = 0x3c + len(U_BOOT_DATA)
         expected3 = tools.get_bytes(0xff, 1) + U_BOOT_DATA
         self.assertEqual(expected3, data[upto2:upto3])
 
-        expected4 = sym_values + U_BOOT_TPL_DATA[20:]
+        expected4 = sym_values + U_BOOT_TPL_DATA[24:]
         self.assertEqual(expected4, data[upto3:upto3 + len(U_BOOT_TPL_DATA)])
 
     def testSymbolsTplSection(self):
@@ -3631,14 +3632,14 @@ class TestFunctional(unittest.TestCase):
         self._SetupSplElf('u_boot_binman_syms')
         self._SetupTplElf('u_boot_binman_syms')
         self._CheckSymbolsTplSection('149_symbols_tpl.dts',
-                                     [0x04, 0x1c, 0x10 + 0x34, 0x04])
+                                     [0x04, 0x20, 0x10 + 0x3c, 0x04])
 
     def testSymbolsTplSectionX86(self):
         """Test binman can assign symbols in a section with end-at-4gb"""
         self._SetupSplElf('u_boot_binman_syms_x86')
         self._SetupTplElf('u_boot_binman_syms_x86')
         self._CheckSymbolsTplSection('155_symbols_tpl_x86.dts',
-                                     [0xffffff04, 0xffffff1c, 0xffffff34,
+                                     [0xffffff04, 0xffffff20, 0xffffff3c,
                                       0x04])
 
     def testPackX86RomIfwiSectiom(self):
@@ -4488,7 +4489,7 @@ class TestFunctional(unittest.TestCase):
 
     def testSymbolsSubsection(self):
         """Test binman can assign symbols from a subsection"""
-        self.checkSymbols('187_symbols_sub.dts', U_BOOT_SPL_DATA, 0x18)
+        self.checkSymbols('187_symbols_sub.dts', U_BOOT_SPL_DATA, 0x1c)
 
     def testReadImageEntryArg(self):
         """Test reading an image that would need an entry arg to generate"""
diff --git a/tools/binman/main.py b/tools/binman/main.py
index 5fb9404..14432a8 100755
--- a/tools/binman/main.py
+++ b/tools/binman/main.py
@@ -13,7 +13,6 @@ import os
 import site
 import sys
 import traceback
-import unittest
 
 # Get the absolute path to this file at run-time
 our_path = os.path.dirname(os.path.realpath(__file__))
@@ -73,19 +72,18 @@ def RunTests(debug, verbosity, processes, test_preserve_dirs, args, toolpath):
     from binman import image_test
     import doctest
 
-    result = unittest.TestResult()
     test_name = args and args[0] or None
 
     # Run the entry tests first ,since these need to be the first to import the
     # 'entry' module.
-    test_util.run_test_suites(
-        result, debug, verbosity, test_preserve_dirs, processes, test_name,
+    result = test_util.run_test_suites(
+        'binman', debug, verbosity, test_preserve_dirs, processes, test_name,
         toolpath,
         [bintool_test.TestBintool, entry_test.TestEntry, ftest.TestFunctional,
          fdt_test.TestFdt, elf_test.TestElf, image_test.TestImage,
          cbfs_util_test.TestCbfs, fip_util_test.TestFip])
 
-    return test_util.report_result('binman', test_name, result)
+    return (0 if result.wasSuccessful() else 1)
 
 def RunTestCoverage(toolpath):
     """Run the tests and check that we get 100% coverage"""
diff --git a/tools/binman/test/021_image_pad.dts b/tools/binman/test/021_image_pad.dts
index 1ff8dab..c5abbbc 100644
--- a/tools/binman/test/021_image_pad.dts
+++ b/tools/binman/test/021_image_pad.dts
@@ -10,7 +10,7 @@
 		};
 
 		u-boot {
-			offset = <24>;
+			offset = <28>;
 		};
 	};
 };
diff --git a/tools/binman/test/024_sorted.dts b/tools/binman/test/024_sorted.dts
index b79d9ad..b54f9b1 100644
--- a/tools/binman/test/024_sorted.dts
+++ b/tools/binman/test/024_sorted.dts
@@ -7,7 +7,7 @@
 	binman {
 		sort-by-offset;
 		u-boot {
-			offset = <26>;
+			offset = <30>;
 		};
 
 		u-boot-spl {
diff --git a/tools/binman/test/028_pack_4gb_outside.dts b/tools/binman/test/028_pack_4gb_outside.dts
index 11a1f60..b6ad7fb 100644
--- a/tools/binman/test/028_pack_4gb_outside.dts
+++ b/tools/binman/test/028_pack_4gb_outside.dts
@@ -13,7 +13,7 @@
 		};
 
 		u-boot-spl {
-			offset = <0xffffffe7>;
+			offset = <0xffffffe3>;
 		};
 	};
 };
diff --git a/tools/binman/test/029_x86_rom.dts b/tools/binman/test/029_x86_rom.dts
index 88aa007..ad8f9d6 100644
--- a/tools/binman/test/029_x86_rom.dts
+++ b/tools/binman/test/029_x86_rom.dts
@@ -7,13 +7,13 @@
 	binman {
 		sort-by-offset;
 		end-at-4gb;
-		size = <32>;
+		size = <36>;
 		u-boot {
-			offset = <0xffffffe0>;
+			offset = <0xffffffdc>;
 		};
 
 		u-boot-spl {
-			offset = <0xffffffe7>;
+			offset = <0xffffffe3>;
 		};
 	};
 };
diff --git a/tools/binman/test/053_symbols.dts b/tools/binman/test/053_symbols.dts
index 2965809..b28f34a 100644
--- a/tools/binman/test/053_symbols.dts
+++ b/tools/binman/test/053_symbols.dts
@@ -10,7 +10,7 @@
 		};
 
 		u-boot {
-			offset = <0x18>;
+			offset = <0x1c>;
 		};
 
 		u-boot-spl2 {
diff --git a/tools/binman/test/149_symbols_tpl.dts b/tools/binman/test/149_symbols_tpl.dts
index 0a4ab3f..4e649c4 100644
--- a/tools/binman/test/149_symbols_tpl.dts
+++ b/tools/binman/test/149_symbols_tpl.dts
@@ -11,12 +11,12 @@
 		};
 
 		u-boot-spl2 {
-			offset = <0x1c>;
+			offset = <0x20>;
 			type = "u-boot-spl";
 		};
 
 		u-boot {
-			offset = <0x34>;
+			offset = <0x3c>;
 		};
 
 		section {
diff --git a/tools/binman/test/155_symbols_tpl_x86.dts b/tools/binman/test/155_symbols_tpl_x86.dts
index 9d7dc51..e1ce33e 100644
--- a/tools/binman/test/155_symbols_tpl_x86.dts
+++ b/tools/binman/test/155_symbols_tpl_x86.dts
@@ -14,12 +14,12 @@
 		};
 
 		u-boot-spl2 {
-			offset = <0xffffff1c>;
+			offset = <0xffffff20>;
 			type = "u-boot-spl";
 		};
 
 		u-boot {
-			offset = <0xffffff34>;
+			offset = <0xffffff3c>;
 		};
 
 		section {
diff --git a/tools/binman/test/187_symbols_sub.dts b/tools/binman/test/187_symbols_sub.dts
index 54511a7..3ab62d3 100644
--- a/tools/binman/test/187_symbols_sub.dts
+++ b/tools/binman/test/187_symbols_sub.dts
@@ -11,7 +11,7 @@
 			};
 
 			u-boot {
-				offset = <24>;
+				offset = <28>;
 			};
 		};
 
diff --git a/tools/binman/test/Makefile b/tools/binman/test/Makefile
index 57057e2..bea8567 100644
--- a/tools/binman/test/Makefile
+++ b/tools/binman/test/Makefile
@@ -21,7 +21,7 @@ CC		= $(CROSS_COMPILE)gcc
 OBJCOPY		= $(CROSS_COMPILE)objcopy
 
 VPATH := $(SRC)
-CFLAGS := -march=i386 -m32 -nostdlib -I $(SRC)../../../include \
+CFLAGS := -march=i386 -m32 -nostdlib -I $(SRC)../../../include -I $(SRC) \
 	-Wl,--no-dynamic-linker
 
 LDS_UCODE := -T $(SRC)u_boot_ucode_ptr.lds
diff --git a/tools/binman/test/generated/autoconf.h b/tools/binman/test/generated/autoconf.h
new file mode 100644
index 0000000..6a23039
--- /dev/null
+++ b/tools/binman/test/generated/autoconf.h
@@ -0,0 +1,3 @@
+#define CONFIG_BINMAN 1
+#define CONFIG_SPL_BUILD 1
+#define CONFIG_SPL_BINMAN_SYMBOLS 1
diff --git a/tools/binman/test/u_boot_binman_syms.c b/tools/binman/test/u_boot_binman_syms.c
index 37fc339..ed76124 100644
--- a/tools/binman/test/u_boot_binman_syms.c
+++ b/tools/binman/test/u_boot_binman_syms.c
@@ -5,9 +5,13 @@
  * Simple program to create some binman symbols. This is used by binman tests.
  */
 
-#define CONFIG_BINMAN
+typedef unsigned long ulong;
+
+#include <linux/kconfig.h>
 #include <binman_sym.h>
 
+DECLARE_BINMAN_MAGIC_SYM;
+
 binman_sym_declare(unsigned long, u_boot_spl_any, offset);
 binman_sym_declare(unsigned long long, u_boot_spl2, offset);
 binman_sym_declare(unsigned long, u_boot_any, image_pos);
diff --git a/tools/binman/test/u_boot_binman_syms_size.c b/tools/binman/test/u_boot_binman_syms_size.c
index 7224bc1..fa41b3d 100644
--- a/tools/binman/test/u_boot_binman_syms_size.c
+++ b/tools/binman/test/u_boot_binman_syms_size.c
@@ -5,7 +5,11 @@
  * Simple program to create some binman symbols. This is used by binman tests.
  */
 
-#define CONFIG_BINMAN
+typedef unsigned long ulong;
+
+#include <linux/kconfig.h>
 #include <binman_sym.h>
 
+DECLARE_BINMAN_MAGIC_SYM;
+
 binman_sym_declare(char, u_boot_spl, pos);
diff --git a/tools/buildman/main.py b/tools/buildman/main.py
index 3b6af24..67c560c 100755
--- a/tools/buildman/main.py
+++ b/tools/buildman/main.py
@@ -11,7 +11,6 @@ import multiprocessing
 import os
 import re
 import sys
-import unittest
 
 # Bring in the patman libraries
 our_path = os.path.dirname(os.path.realpath(__file__))
@@ -34,19 +33,18 @@ def RunTests(skip_net_tests, verboose, args):
     from buildman import test
     import doctest
 
-    result = unittest.TestResult()
     test_name = args and args[0] or None
     if skip_net_tests:
         test.use_network = False
 
     # Run the entry tests first ,since these need to be the first to import the
     # 'entry' module.
-    test_util.run_test_suites(
-        result, False, verboose, False, None, test_name, [],
+    result = test_util.run_test_suites(
+        'buildman', False, verboose, False, None, test_name, [],
         [test.TestBuild, func_test.TestFunctional,
          'buildman.toolchain', 'patman.gitutil'])
 
-    return test_util.report_result('buildman', test_name, result)
+    return (0 if result.wasSuccessful() else 1)
 
 options, args = cmdline.ParseArgs()
 
diff --git a/tools/concurrencytest/concurrencytest.py b/tools/concurrencytest/concurrencytest.py
index 5e88b94..1c4f03f 100644
--- a/tools/concurrencytest/concurrencytest.py
+++ b/tools/concurrencytest/concurrencytest.py
@@ -31,6 +31,7 @@ from subunit import ProtocolTestCase, TestProtocolClient
 from subunit.test_results import AutoTimingTestResultDecorator
 
 from testtools import ConcurrentTestSuite, iterate_tests
+from testtools.content import TracebackContent, text_content
 
 
 _all__ = [
@@ -43,11 +44,81 @@ _all__ = [
 CPU_COUNT = cpu_count()
 
 
-def fork_for_tests(concurrency_num=CPU_COUNT):
+class BufferingTestProtocolClient(TestProtocolClient):
+    """A TestProtocolClient which can buffer the test outputs
+
+    This class captures the stdout and stderr output streams of the
+    tests as it runs them, and includes the output texts in the subunit
+    stream as additional details.
+
+    Args:
+        stream: A file-like object to write a subunit stream to
+        buffer (bool): True to capture test stdout/stderr outputs and
+            include them in the test details
+    """
+    def __init__(self, stream, buffer=True):
+        super().__init__(stream)
+        self.buffer = buffer
+
+    def _addOutcome(self, outcome, test, error=None, details=None,
+            error_permitted=True):
+        """Report a test outcome to the subunit stream
+
+        The parent class uses this function as a common implementation
+        for various methods that report successes, errors, failures, etc.
+
+        This version automatically upgrades the error tracebacks to the
+        new 'details' format by wrapping them in a Content object, so
+        that we can include the captured test output in the test result
+        details.
+
+        Args:
+            outcome: A string describing the outcome - used as the
+                event name in the subunit stream.
+            test: The test case whose outcome is to be reported
+            error: Standard unittest positional argument form - an
+                exc_info tuple.
+            details: New Testing-in-python drafted API; a dict from
+                string to subunit.Content objects.
+            error_permitted: If True then one and only one of error or
+                details must be supplied. If False then error must not
+                be supplied and details is still optional.
+        """
+        if details is None:
+            details = {}
+
+        # Parent will raise an exception if error_permitted is False but
+        # error is not None. We want that exception in that case, so
+        # don't touch error when error_permitted is explicitly False.
+        if error_permitted and error is not None:
+            # Parent class prefers error over details
+            details['traceback'] = TracebackContent(error, test)
+            error_permitted = False
+            error = None
+
+        if self.buffer:
+            stdout = sys.stdout.getvalue()
+            if stdout:
+                details['stdout'] = text_content(stdout)
+
+            stderr = sys.stderr.getvalue()
+            if stderr:
+                details['stderr'] = text_content(stderr)
+
+        return super()._addOutcome(outcome, test, error=error,
+                details=details, error_permitted=error_permitted)
+
+
+def fork_for_tests(concurrency_num=CPU_COUNT, buffer=False):
     """Implementation of `make_tests` used to construct `ConcurrentTestSuite`.
 
     :param concurrency_num: number of processes to use.
     """
+    if buffer:
+        test_protocol_client_class = BufferingTestProtocolClient
+    else:
+        test_protocol_client_class = TestProtocolClient
+
     def do_fork(suite):
         """Take suite and start up multiple runners by forking (Unix only).
 
@@ -76,7 +147,7 @@ def fork_for_tests(concurrency_num=CPU_COUNT):
                     # child actually gets keystrokes for pdb etc).
                     sys.stdin.close()
                     subunit_result = AutoTimingTestResultDecorator(
-                        TestProtocolClient(stream)
+                        test_protocol_client_class(stream)
                     )
                     process_suite.run(subunit_result)
                 except:
@@ -93,7 +164,13 @@ def fork_for_tests(concurrency_num=CPU_COUNT):
             else:
                 os.close(c2pwrite)
                 stream = os.fdopen(c2pread, 'rb')
-                test = ProtocolTestCase(stream)
+                # If we don't pass the second argument here, it defaults
+                # to sys.stdout.buffer down the line. But if we don't
+                # pass it *now*, it may be resolved after sys.stdout is
+                # replaced with a StringIO (to capture tests' outputs)
+                # which doesn't have a buffer attribute and can end up
+                # occasionally causing a 'broken-runner' error.
+                test = ProtocolTestCase(stream, sys.stdout.buffer)
                 result.append(test)
         return result
     return do_fork
diff --git a/tools/dtoc/main.py b/tools/dtoc/main.py
index fac9db9..5508759 100755
--- a/tools/dtoc/main.py
+++ b/tools/dtoc/main.py
@@ -24,7 +24,6 @@ see doc/driver-model/of-plat.rst
 from argparse import ArgumentParser
 import os
 import sys
-import unittest
 
 # Bring in the patman libraries
 our_path = os.path.dirname(os.path.realpath(__file__))
@@ -49,18 +48,18 @@ def run_tests(processes, args):
     from dtoc import test_src_scan
     from dtoc import test_dtoc
 
-    result = unittest.TestResult()
     sys.argv = [sys.argv[0]]
     test_name = args.files and args.files[0] or None
 
     test_dtoc.setup()
 
-    test_util.run_test_suites(
-        result, debug=True, verbosity=1, test_preserve_dirs=False,
+    result = test_util.run_test_suites(
+        toolname='dtoc', debug=True, verbosity=1, test_preserve_dirs=False,
         processes=processes, test_name=test_name, toolpath=[],
         class_and_module_list=[test_dtoc.TestDtoc,test_src_scan.TestSrcScan])
 
-    return test_util.report_result('binman', test_name, result)
+    return (0 if result.wasSuccessful() else 1)
+
 
 def RunTestCoverage():
     """Run the tests and check that we get 100% coverage"""
diff --git a/tools/dtoc/test_dtoc.py b/tools/dtoc/test_dtoc.py
index c81bcc9..879ca2a 100755
--- a/tools/dtoc/test_dtoc.py
+++ b/tools/dtoc/test_dtoc.py
@@ -616,8 +616,11 @@ struct dm_test_pdata __attribute__ ((section (".priv_data")))
 u8 _denx_u_boot_test_bus_priv_some_bus[sizeof(struct dm_test_priv)]
 \t__attribute__ ((section (".priv_data")));
 #include <dm/test.h>
-u8 _denx_u_boot_test_bus_ucplat_some_bus[sizeof(struct dm_test_uclass_priv)]
+u8 _denx_u_boot_test_bus_ucplat_some_bus[sizeof(struct dm_test_uclass_plat)]
 \t__attribute__ ((section (".priv_data")));
+#include <dm/test.h>
+u8 _denx_u_boot_test_bus_uc_priv_some_bus[sizeof(struct dm_test_uclass_priv)]
+	__attribute__ ((section (".priv_data")));
 #include <test.h>
 
 DM_DEVICE_INST(some_bus) = {
@@ -628,6 +631,7 @@ DM_DEVICE_INST(some_bus) = {
 \t.driver_data\t= DM_TEST_TYPE_FIRST,
 \t.priv_\t\t= _denx_u_boot_test_bus_priv_some_bus,
 \t.uclass\t\t= DM_UCLASS_REF(testbus),
+\t.uclass_priv_ = _denx_u_boot_test_bus_uc_priv_some_bus,
 \t.uclass_node\t= {
 \t\t.prev = &DM_UCLASS_REF(testbus)->dev_head,
 \t\t.next = &DM_UCLASS_REF(testbus)->dev_head,
diff --git a/tools/dtoc/test_fdt.py b/tools/dtoc/test_fdt.py
index 914ed6a..3baf443 100755
--- a/tools/dtoc/test_fdt.py
+++ b/tools/dtoc/test_fdt.py
@@ -780,25 +780,17 @@ def RunTests(args):
     Args:
         args: List of positional args provided to fdt. This can hold a test
             name to execute (as in 'fdt -t testFdt', for example)
+
+    Returns:
+        Return code, 0 on success
     """
-    result = unittest.TestResult()
-    sys.argv = [sys.argv[0]]
     test_name = args and args[0] or None
-    for module in (TestFdt, TestNode, TestProp, TestFdtUtil):
-        if test_name:
-            try:
-                suite = unittest.TestLoader().loadTestsFromName(test_name, module)
-            except AttributeError:
-                continue
-        else:
-            suite = unittest.TestLoader().loadTestsFromTestCase(module)
-        suite.run(result)
-
-    print(result)
-    for _, err in result.errors:
-        print(err)
-    for _, err in result.failures:
-        print(err)
+    result = test_util.run_test_suites(
+        'test_fdt', False, False, False, None, test_name, None,
+        [TestFdt, TestNode, TestProp, TestFdtUtil])
+
+    return (0 if result.wasSuccessful() else 1)
+
 
 if __name__ != '__main__':
     sys.exit(1)
@@ -816,6 +808,7 @@ parser.add_option('-T', '--test-coverage', action='store_true',
 
 # Run our meagre tests
 if options.test:
-    RunTests(args)
+    ret_code = RunTests(args)
+    sys.exit(ret_code)
 elif options.test_coverage:
     RunTestCoverage()
diff --git a/tools/patman/main.py b/tools/patman/main.py
index 2a2ac45..66d4806 100755
--- a/tools/patman/main.py
+++ b/tools/patman/main.py
@@ -12,7 +12,6 @@ import re
 import shutil
 import sys
 import traceback
-import unittest
 
 if __name__ == "__main__":
     # Allow 'from patman import xxx to work'
@@ -134,13 +133,12 @@ if args.cmd == 'test':
     import doctest
     from patman import func_test
 
-    result = unittest.TestResult()
-    test_util.run_test_suites(
-        result, False, False, False, None, None, None,
+    result = test_util.run_test_suites(
+        'patman', False, False, False, None, None, None,
         [test_checkpatch.TestPatch, func_test.TestFunctional,
          'gitutil', 'settings', 'terminal'])
 
-    sys.exit(test_util.report_result('patman', args.testname, result))
+    sys.exit(0 if result.wasSuccessful() else 1)
 
 # Process commits, produce patches files, check them, email them
 elif args.cmd == 'send':
diff --git a/tools/patman/settings.py b/tools/patman/settings.py
index 7c2b5c1..4c847fe 100644
--- a/tools/patman/settings.py
+++ b/tools/patman/settings.py
@@ -246,8 +246,10 @@ def _UpdateDefaults(main_parser, config):
 
     # Collect the defaults from each parser
     defaults = {}
+    parser_defaults = []
     for parser in parsers:
         pdefs = parser.parse_known_args()[0]
+        parser_defaults.append(pdefs)
         defaults.update(vars(pdefs))
 
     # Go through the settings and collect defaults
@@ -264,8 +266,11 @@ def _UpdateDefaults(main_parser, config):
         else:
             print("WARNING: Unknown setting %s" % name)
 
-    # Set all the defaults (this propagates through all subparsers)
+    # Set all the defaults and manually propagate them to subparsers
     main_parser.set_defaults(**defaults)
+    for parser, pdefs in zip(parsers, parser_defaults):
+        parser.set_defaults(**{ k: v for k, v in defaults.items()
+                                    if k in pdefs })
 
 def _ReadAliasFile(fname):
     """Read in the U-Boot git alias file if it exists.
diff --git a/tools/patman/test_util.py b/tools/patman/test_util.py
index c60eb36..c27e0b3 100644
--- a/tools/patman/test_util.py
+++ b/tools/patman/test_util.py
@@ -15,6 +15,7 @@ from patman import command
 
 from io import StringIO
 
+buffer_outputs = True
 use_concurrent = True
 try:
     from concurrencytest.concurrencytest import ConcurrentTestSuite
@@ -102,49 +103,85 @@ def capture_sys_output():
         sys.stdout, sys.stderr = old_out, old_err
 
 
-def report_result(toolname:str, test_name: str, result: unittest.TestResult):
-    """Report the results from a suite of tests
+class FullTextTestResult(unittest.TextTestResult):
+    """A test result class that can print extended text results to a stream
+
+    This is meant to be used by a TestRunner as a result class. Like
+    TextTestResult, this prints out the names of tests as they are run,
+    errors as they occur, and a summary of the results at the end of the
+    test run. Beyond those, this prints information about skipped tests,
+    expected failures and unexpected successes.
 
     Args:
-        toolname: Name of the tool that ran the tests
-        test_name: Name of test that was run, or None for all
-        result: A unittest.TestResult object containing the results
+        stream: A file-like object to write results to
+        descriptions (bool): True to print descriptions with test names
+        verbosity (int): Detail of printed output per test as they run
+            Test stdout and stderr always get printed when buffering
+            them is disabled by the test runner. In addition to that,
+            0: Print nothing
+            1: Print a dot per test
+            2: Print test names
+            3: Print test names, and buffered outputs for failing tests
     """
-    # Remove errors which just indicate a missing test. Since Python v3.5 If an
-    # ImportError or AttributeError occurs while traversing name then a
-    # synthetic test that raises that error when run will be returned. These
-    # errors are included in the errors accumulated by result.errors.
-    if test_name:
-        errors = []
-
-        for test, err in result.errors:
-            if ("has no attribute '%s'" % test_name) not in err:
-                errors.append((test, err))
-            result.testsRun -= 1
-        result.errors = errors
-
-    print(result)
-    for test, err in result.errors:
-        print(test.id(), err)
-    for test, err in result.failures:
-        print(err, result.failures)
-    if result.skipped:
-        print('%d %s test%s SKIPPED:' % (len(result.skipped), toolname,
-            's' if len(result.skipped) > 1 else ''))
-        for skip_info in result.skipped:
-            print('%s: %s' % (skip_info[0], skip_info[1]))
-    if result.errors or result.failures:
-        print('%s tests FAILED' % toolname)
-        return 1
-    return 0
-
-
-def run_test_suites(result, debug, verbosity, test_preserve_dirs, processes,
+    def __init__(self, stream, descriptions, verbosity):
+        self.verbosity = verbosity
+        super().__init__(stream, descriptions, verbosity)
+
+    def printErrors(self):
+        "Called by TestRunner after test run to summarize the tests"
+        # The parent class doesn't keep unexpected successes in the same
+        # format as the rest. Adapt it to what printErrorList expects.
+        unexpected_successes = [
+            (test, 'Test was expected to fail, but succeeded.\n')
+            for test in self.unexpectedSuccesses
+        ]
+
+        super().printErrors()  # FAIL and ERROR
+        self.printErrorList('SKIP', self.skipped)
+        self.printErrorList('XFAIL', self.expectedFailures)
+        self.printErrorList('XPASS', unexpected_successes)
+
+    def addError(self, test, err):
+        """Called when an error has occurred."""
+        super().addError(test, err)
+        self._mirrorOutput &= self.verbosity >= 3
+
+    def addFailure(self, test, err):
+        """Called when a test has failed."""
+        super().addFailure(test, err)
+        self._mirrorOutput &= self.verbosity >= 3
+
+    def addSubTest(self, test, subtest, err):
+        """Called at the end of a subtest."""
+        super().addSubTest(test, subtest, err)
+        self._mirrorOutput &= self.verbosity >= 3
+
+    def addSuccess(self, test):
+        """Called when a test has completed successfully"""
+        super().addSuccess(test)
+        # Don't print stdout/stderr for successful tests
+        self._mirrorOutput = False
+
+    def addSkip(self, test, reason):
+        """Called when a test is skipped."""
+        # Add empty line to keep spacing consistent with other results
+        if not reason.endswith('\n'):
+            reason += '\n'
+        super().addSkip(test, reason)
+        self._mirrorOutput &= self.verbosity >= 3
+
+    def addExpectedFailure(self, test, err):
+        """Called when an expected failure/error occurred."""
+        super().addExpectedFailure(test, err)
+        self._mirrorOutput &= self.verbosity >= 3
+
+
+def run_test_suites(toolname, debug, verbosity, test_preserve_dirs, processes,
                     test_name, toolpath, class_and_module_list):
     """Run a series of test suites and collect the results
 
     Args:
-        result: A unittest.TestResult object to add the results to
+        toolname: Name of the tool that ran the tests
         debug: True to enable debugging, which shows a full stack trace on error
         verbosity: Verbosity level to use (0-4)
         test_preserve_dirs: True to preserve the input directory used by tests
@@ -158,11 +195,6 @@ def run_test_suites(result, debug, verbosity, test_preserve_dirs, processes,
         class_and_module_list: List of test classes (type class) and module
            names (type str) to run
     """
-    for module in class_and_module_list:
-        if isinstance(module, str) and (not test_name or test_name == module):
-            suite = doctest.DocTestSuite(module)
-            suite.run(result)
-
     sys.argv = [sys.argv[0]]
     if debug:
         sys.argv.append('-D')
@@ -174,6 +206,22 @@ def run_test_suites(result, debug, verbosity, test_preserve_dirs, processes,
 
     suite = unittest.TestSuite()
     loader = unittest.TestLoader()
+    runner = unittest.TextTestRunner(
+        stream=sys.stdout,
+        verbosity=(1 if verbosity is None else verbosity),
+        buffer=buffer_outputs,
+        resultclass=FullTextTestResult,
+    )
+
+    if use_concurrent and processes != 1:
+        suite = ConcurrentTestSuite(suite,
+                fork_for_tests(processes or multiprocessing.cpu_count(),
+                               buffer=buffer_outputs))
+
+    for module in class_and_module_list:
+        if isinstance(module, str) and (not test_name or test_name == module):
+            suite.addTests(doctest.DocTestSuite(module))
+
     for module in class_and_module_list:
         if isinstance(module, str):
             continue
@@ -184,15 +232,17 @@ def run_test_suites(result, debug, verbosity, test_preserve_dirs, processes,
                 preserve_outdirs=test_preserve_dirs and test_name is not None,
                 toolpath=toolpath, verbosity=verbosity)
         if test_name:
-            try:
+            # Since Python v3.5 If an ImportError or AttributeError occurs
+            # while traversing a name then a synthetic test that raises that
+            # error when run will be returned. Check that the requested test
+            # exists, otherwise these errors are included in the results.
+            if test_name in loader.getTestCaseNames(module):
                 suite.addTests(loader.loadTestsFromName(test_name, module))
-            except AttributeError:
-                continue
         else:
             suite.addTests(loader.loadTestsFromTestCase(module))
-    if use_concurrent and processes != 1:
-        concurrent_suite = ConcurrentTestSuite(suite,
-                fork_for_tests(processes or multiprocessing.cpu_count()))
-        concurrent_suite.run(result)
-    else:
-        suite.run(result)
+
+    print(f" Running {toolname} tests ".center(70, "="))
+    result = runner.run(suite)
+    print()
+
+    return result