davinci: add mdio platform devices

This patch adds mdio platform devices on SoCs that have the necessary
hardware.  Clock lookup entries (aliases) have also been added, so that the
MDIO and EMAC drivers can independently enable/disable a shared underlying
clock.  Further, the EMAC MMR region has been split down into separate MDIO
and EMAC regions.

Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Acked-by: David S. Miller <davem@davemloft.net>
Tested-by: Michael Williamson <michael.williamson@criticallink.com>
Tested-by: Caglar Akyuz <caglarakyuz@gmail.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

1 files changed, 20 insertions, 1 deletions

diff --git a/arch/arm/mach-davinci/dm646x.c b/arch/arm/mach-davinci/dm646x.c
index e4a3df1872ac..8da886bc6df5 100644
--- a/arch/arm/mach-davinci/dm646x.c
+++ b/arch/arm/mach-davinci/dm646x.c
@@ -366,7 +366,7 @@ static struct emac_platform_data dm646x_emac_pdata = {
 static struct resource dm646x_emac_resources[] = {
         {
                 .start  = DM646X_EMAC_BASE,
-                .end    = DM646X_EMAC_BASE + 0x47ff,
+                .end    = DM646X_EMAC_BASE + SZ_16K - 1,
                 .flags  = IORESOURCE_MEM,
         },
         {
@@ -401,6 +401,21 @@ static struct platform_device dm646x_emac_device = {
         .resource       = dm646x_emac_resources,
 };
 
+static struct resource dm646x_mdio_resources[] = {
+        {
+                .start  = DM646X_EMAC_MDIO_BASE,
+                .end    = DM646X_EMAC_MDIO_BASE + SZ_4K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+};
+
+static struct platform_device dm646x_mdio_device = {
+        .name           = "davinci_mdio",
+        .id             = 0,
+        .num_resources  = ARRAY_SIZE(dm646x_mdio_resources),
+        .resource       = dm646x_mdio_resources,
+};
+
 /*
  * Device specific mux setup
  *
@@ -897,7 +912,11 @@ static int __init dm646x_init_devices(void)
         if (!cpu_is_davinci_dm646x())
                 return 0;
 
+        platform_device_register(&dm646x_mdio_device);
         platform_device_register(&dm646x_emac_device);
+        clk_add_alias(NULL, dev_name(&dm646x_mdio_device.dev),
+                      NULL, &dm646x_emac_device.dev);
+
         return 0;
 }
 postcore_initcall(dm646x_init_devices);