ssi: Name the CS GPIO

To get it out of the default GPIO list. This allows child devices to
use the un-named GPIO namespace without having to be SSI aware. That
is, there is no more need for machines to know about the obscure
policy where GPIO 0 is the SSI chip-select and GPIO 1..N are the
concrete class GPIOs (defined locally as 0..N-1).

This is most notable in stellaris, which uses a device which has both
SSI and concrete level GPIOs.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>

5 files changed, 10 insertions, 7 deletions

diff --git a/hw/arm/stellaris.c b/hw/arm/stellaris.c
index 3b7a27a..80028e8 100644
--- a/hw/arm/stellaris.c
+++ b/hw/arm/stellaris.c
@@ -1290,9 +1290,10 @@ static void stellaris_init(const char *kernel_filename, const char *cpu_model,
 
             sddev = ssi_create_slave(bus, "ssi-sd");
             ssddev = ssi_create_slave(bus, "ssd0323");
-            gpio_out[GPIO_D][0] = qemu_irq_split(qdev_get_gpio_in(sddev, 0),
-                                                 qdev_get_gpio_in(ssddev, 0));
-            gpio_out[GPIO_C][7] = qdev_get_gpio_in(ssddev, 1);
+            gpio_out[GPIO_D][0] = qemu_irq_split(
+                    qdev_get_gpio_in_named(sddev, SSI_GPIO_CS, 0),
+                    qdev_get_gpio_in_named(ssddev, SSI_GPIO_CS, 0));
+            gpio_out[GPIO_C][7] = qdev_get_gpio_in(ssddev, 0);
 
             /* Make sure the select pin is high.  */
             qemu_irq_raise(gpio_out[GPIO_D][0]);
diff --git a/hw/arm/xilinx_zynq.c b/hw/arm/xilinx_zynq.c
index bae0416..ba5aa82 100644
--- a/hw/arm/xilinx_zynq.c
+++ b/hw/arm/xilinx_zynq.c
@@ -94,7 +94,7 @@ static inline void zynq_init_spi_flashes(uint32_t base_addr, qemu_irq irq,
         for (j = 0; j < num_ss; ++j) {
             flash_dev = ssi_create_slave(spi, "n25q128");
 
-            cs_line = qdev_get_gpio_in(flash_dev, 0);
+            cs_line = qdev_get_gpio_in_named(flash_dev, SSI_GPIO_CS, 0);
             sysbus_connect_irq(busdev, i * num_ss + j + 1, cs_line);
         }
     }
diff --git a/hw/microblaze/petalogix_ml605_mmu.c b/hw/microblaze/petalogix_ml605_mmu.c
index 496330c..aea9c5b 100644
--- a/hw/microblaze/petalogix_ml605_mmu.c
+++ b/hw/microblaze/petalogix_ml605_mmu.c
@@ -196,7 +196,7 @@ petalogix_ml605_init(MachineState *machine)
             qemu_irq cs_line;
 
             dev = ssi_create_slave(spi, "n25q128");
-            cs_line = qdev_get_gpio_in(dev, 0);
+            cs_line = qdev_get_gpio_in_named(dev, SSI_GPIO_CS, 0);
             sysbus_connect_irq(busdev, i+1, cs_line);
         }
     }
diff --git a/hw/ssi/ssi.c b/hw/ssi/ssi.c
index 1c82a93..2aab79b 100644
--- a/hw/ssi/ssi.c
+++ b/hw/ssi/ssi.c
@@ -60,7 +60,7 @@ static int ssi_slave_init(DeviceState *dev)
 
     if (ssc->transfer_raw == ssi_transfer_raw_default &&
             ssc->cs_polarity != SSI_CS_NONE) {
-        qdev_init_gpio_in(dev, ssi_cs_default, 1);
+        qdev_init_gpio_in_named(dev, ssi_cs_default, SSI_GPIO_CS, 1);
     }
 
     return ssc->init(s);
@@ -155,7 +155,7 @@ static int ssi_auto_connect_slave(Object *child, void *opaque)
         return 0;
     }
 
-    cs_line = qdev_get_gpio_in(DEVICE(dev), 0);
+    cs_line = qdev_get_gpio_in_named(DEVICE(dev), SSI_GPIO_CS, 0);
     qdev_set_parent_bus(DEVICE(dev), BUS(arg->bus));
     **arg->cs_linep = cs_line;
     (*arg->cs_linep)++;
diff --git a/include/hw/ssi.h b/include/hw/ssi.h
index 6c13fb2..df0f838 100644
--- a/include/hw/ssi.h
+++ b/include/hw/ssi.h
@@ -23,6 +23,8 @@ typedef struct SSISlave SSISlave;
 #define SSI_SLAVE_GET_CLASS(obj) \
      OBJECT_GET_CLASS(SSISlaveClass, (obj), TYPE_SSI_SLAVE)
 
+#define SSI_GPIO_CS "ssi-gpio-cs"
+
 typedef enum {
     SSI_CS_NONE = 0,
     SSI_CS_LOW,