[Qemu-devel] [PATCH v2 1/6] arm: Uniquely name imx25 I2C buses.

["Alastair D'Silva" <alastair@au1.ibm.com>]

From: Alastair D'Silva <alastair@d-silva.org>

The imx25 chip provides 3 i2c buses, but they have all been named
"i2c", which makes it difficult to predict which bus a device will
be connected to when specified on the command line.

This patch addresses the issue by naming the buses uniquely:
  i2c.0 i2c.1 i2c.2

Signed-off-by: Alastair D'Silva <alastair@d-silva.org>
---
 hw/arm/imx25_pdk.c | 4 +---
 hw/i2c/imx_i2c.c   | 6 +++++-
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/hw/arm/imx25_pdk.c b/hw/arm/imx25_pdk.c
index 025b608..c6f04d3 100644
--- a/hw/arm/imx25_pdk.c
+++ b/hw/arm/imx25_pdk.c
@@ -138,9 +138,7 @@ static void imx25_pdk_init(MachineState *machine)
          * We add it here (only on qtest usage) to be able to do a bit
          * of simple qtest. See "make check" for details.
          */
-        i2c_create_slave((I2CBus *)qdev_get_child_bus(DEVICE(&s->soc.i2c[0]),
-                                                      "i2c"),
-                         "ds1338", 0x68);
+        i2c_create_slave(s->soc.i2c[0].bus, "ds1338", 0x68);
     }
 }
 
diff --git a/hw/i2c/imx_i2c.c b/hw/i2c/imx_i2c.c
index 37e5a62..7be10fb 100644
--- a/hw/i2c/imx_i2c.c
+++ b/hw/i2c/imx_i2c.c
@@ -305,12 +305,16 @@ static const VMStateDescription imx_i2c_vmstate = {
 static void imx_i2c_realize(DeviceState *dev, Error **errp)
 {
     IMXI2CState *s = IMX_I2C(dev);
+    static int bus_count;
+    char name[16];
+
+    snprintf(name, sizeof(name), "i2c.%d", bus_count++);
 
     memory_region_init_io(&s->iomem, OBJECT(s), &imx_i2c_ops, s, TYPE_IMX_I2C,
                           IMX_I2C_MEM_SIZE);
     sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->iomem);
     sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq);
-    s->bus = i2c_init_bus(DEVICE(dev), "i2c");
+    s->bus = i2c_init_bus(DEVICE(dev), name);
 }
 
 static void imx_i2c_class_init(ObjectClass *klass, void *data)
-- 
2.9.3