net: davinci_emac: separate out davinci mdio

Davinci's MDIO controller is present on other TI devices, without an
accompanying EMAC.  For example, on tnetv107x, the same MDIO module is used in
conjunction with a 3-port switch hardware.

By separating the MDIO controller code into its own platform driver, this
patch allows common logic to be reused on such platforms.
Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Tested-by: Michael Williamson <michael.williamson@criticallink.com>
Tested-by: Caglar Akyuz <caglarakyuz@gmail.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

drivers/net/Kconfig

@@ -958,6 +958,16 @@ config TI_DAVINCI_EMAC
 	  To compile this driver as a module, choose M here: the module
 	  will be called davinci_emac_driver.  This is recommended.
 
+config TI_DAVINCI_MDIO
+	tristate "TI DaVinci MDIO Support"
+	depends on ARM && ( ARCH_DAVINCI || ARCH_OMAP3 )
+	select PHYLIB
+	help
+	  This driver supports TI's DaVinci MDIO module.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called davinci_mdio.  This is recommended.
+
 config DM9000
 	tristate "DM9000 support"
 	depends on ARM || BLACKFIN || MIPS

drivers/net/Makefile

@@ -7,6 +7,7 @@ obj-$(CONFIG_MDIO) += mdio.o
 obj-$(CONFIG_PHYLIB) += phy/
 
 obj-$(CONFIG_TI_DAVINCI_EMAC) += davinci_emac.o
+obj-$(CONFIG_TI_DAVINCI_MDIO) += davinci_mdio.o
 
 obj-$(CONFIG_E1000) += e1000/
 obj-$(CONFIG_E1000E) += e1000e/

include/linux/davinci_emac.h

@@ -14,6 +14,10 @@
 #include <linux/if_ether.h>
 #include <linux/memory.h>
 
+struct mdio_platform_data {
+	unsigned long		bus_freq;
+};
+
 struct emac_platform_data {
 	char mac_addr[ETH_ALEN];
 	u32 ctrl_reg_offset;