board: gateworks: venice: add imx8mn-gw7902 support

The GW7902 is based on the i.MX 8M Mini / Nano SoC featuring:
 - LPDDR4 DRAM
 - eMMC FLASH
 - Gateworks System Controller
 - LTE CAT M1 modem
 - USB 2.0 HUB
 - M.2 Socket with USB2.0, PCIe, and dual-SIM
 - IMX8M FEC
 - PCIe based GbE
 - RS232/RS485/RS422 serial transceiver
 - GPS
 - CAN bus
 - WiFi / Bluetooth
 - MIPI header (DSI/CSI/GPIO/PWM/I2S)
 - PMIC

To add support for the i.MX8M Nano GW7902:
 - Add imx8mn-venice dts/defconfig/include
 - Add imx8mn-gw7902 dts
 - Add imx8mn-2gb lpddr4 dram configs
 - Add misc support for IMX8M Nano SoC
 - rename imx8mm-venice.c to venice.c as it is no longer imx8mm specific
 - update README with differences for IMX8MN vs IMX8MM

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>

1 files changed, 116 insertions, 0 deletions

diff --git a/configs/imx8mn_venice_defconfig b/configs/imx8mn_venice_defconfig
new file mode 100644
index 0000000..e04e026
--- /dev/null
+++ b/configs/imx8mn_venice_defconfig
@@ -0,0 +1,116 @@
+CONFIG_ARM=y
+CONFIG_ARCH_IMX8M=y
+CONFIG_SYS_TEXT_BASE=0x40200000
+CONFIG_SYS_MALLOC_LEN=0x2000000
+CONFIG_SYS_MALLOC_F_LEN=0x10000
+CONFIG_SPL_GPIO=y
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
+CONFIG_SYS_MEMTEST_START=0x40000000
+CONFIG_SYS_MEMTEST_END=0x80000000
+CONFIG_ENV_SIZE=0x8000
+CONFIG_ENV_OFFSET=0xff0000
+CONFIG_DM_GPIO=y
+CONFIG_DEFAULT_DEVICE_TREE="imx8mn-venice"
+CONFIG_SPL_TEXT_BASE=0x912000
+CONFIG_TARGET_IMX8MN_VENICE=y
+CONFIG_SPL_MMC=y
+CONFIG_SPL_SERIAL=y
+CONFIG_SPL=y
+CONFIG_ENV_OFFSET_REDUND=0xff8000
+CONFIG_SPL_IMX_ROMAPI_LOADADDR=0x48000000
+CONFIG_LTO=y
+CONFIG_DISTRO_DEFAULTS=y
+CONFIG_SYS_LOAD_ADDR=0x40480000
+CONFIG_FIT=y
+CONFIG_FIT_EXTERNAL_OFFSET=0x3000
+CONFIG_SPL_LOAD_FIT=y
+# CONFIG_USE_SPL_FIT_GENERATOR is not set
+CONFIG_OF_BOARD_SETUP=y
+CONFIG_OF_SYSTEM_SETUP=y
+# CONFIG_USE_BOOTCOMMAND is not set
+CONFIG_USE_PREBOOT=y
+CONFIG_PREBOOT="gsc wd-disable"
+CONFIG_BOARD_LATE_INIT=y
+CONFIG_SPL_BOOTROM_SUPPORT=y
+CONFIG_SPL_SEPARATE_BSS=y
+CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR=y
+CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR=0x300
+CONFIG_SPL_I2C=y
+CONFIG_SPL_WATCHDOG=y
+CONFIG_SYS_PROMPT="u-boot=> "
+# CONFIG_CMD_EXPORTENV is not set
+# CONFIG_CMD_IMPORTENV is not set
+# CONFIG_CMD_CRC32 is not set
+CONFIG_CMD_MEMTEST=y
+CONFIG_CMD_CLK=y
+CONFIG_CMD_FUSE=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_I2C=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_TIME=y
+CONFIG_CMD_UUID=y
+CONFIG_CMD_PMIC=y
+CONFIG_CMD_REGULATOR=y
+CONFIG_CMD_EXT4_WRITE=y
+# CONFIG_ISO_PARTITION is not set
+# CONFIG_SPL_EFI_PARTITION is not set
+CONFIG_OF_CONTROL=y
+CONFIG_SPL_OF_CONTROL=y
+CONFIG_OF_LIST="imx8mn-venice imx8mn-venice-gw7902"
+CONFIG_ENV_IS_IN_MMC=y
+CONFIG_SYS_REDUNDAND_ENVIRONMENT=y
+CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
+CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_IP_DEFRAG=y
+CONFIG_TFTP_BLOCKSIZE=4096
+CONFIG_SPL_DM=y
+CONFIG_SPL_CLK_COMPOSITE_CCF=y
+CONFIG_CLK_COMPOSITE_CCF=y
+CONFIG_SPL_CLK_IMX8MN=y
+CONFIG_CLK_IMX8MN=y
+CONFIG_MXC_GPIO=y
+CONFIG_DM_I2C=y
+CONFIG_LED=y
+CONFIG_LED_BLINK=y
+CONFIG_LED_GPIO=y
+CONFIG_SUPPORT_EMMC_BOOT=y
+CONFIG_MMC_IO_VOLTAGE=y
+CONFIG_SPL_MMC_IO_VOLTAGE=y
+CONFIG_MMC_UHS_SUPPORT=y
+CONFIG_SPL_MMC_UHS_SUPPORT=y
+CONFIG_MMC_HS400_ES_SUPPORT=y
+CONFIG_MMC_HS400_SUPPORT=y
+CONFIG_SPL_MMC_HS400_SUPPORT=y
+CONFIG_FSL_USDHC=y
+CONFIG_PHYLIB=y
+CONFIG_PHY_TI_DP83867=y
+CONFIG_PHY_FIXED=y
+CONFIG_DM_ETH=y
+CONFIG_DM_MDIO=y
+CONFIG_DM_DSA=y
+CONFIG_PHY_GIGE=y
+CONFIG_FEC_MXC=y
+CONFIG_KSZ9477=y
+CONFIG_MII=y
+CONFIG_PINCTRL=y
+CONFIG_SPL_PINCTRL=y
+CONFIG_PINCTRL_IMX8M=y
+CONFIG_DM_PMIC=y
+CONFIG_DM_PMIC_BD71837=y
+CONFIG_SPL_DM_PMIC_BD71837=y
+CONFIG_DM_PMIC_MP5416=y
+CONFIG_SPL_DM_PMIC_MP5416=y
+CONFIG_DM_REGULATOR=y
+CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_DM_REGULATOR_GPIO=y
+CONFIG_MXC_UART=y
+CONFIG_SYSRESET=y
+CONFIG_SPL_SYSRESET=y
+CONFIG_SYSRESET_PSCI=y
+CONFIG_SYSRESET_WATCHDOG=y
+CONFIG_DM_THERMAL=y
+CONFIG_IMX_TMU=y
+CONFIG_IMX_WATCHDOG=y
+CONFIG_HEXDUMP=y