ath: Add a bus type field

This can be used to store the bus types ( AHB/PCI/USB ).
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath.h

@@ -48,6 +48,12 @@ enum ath_device_state {
 	ATH_HW_INITIALIZED,
 };
 
+enum ath_bus_type {
+	ATH_PCI,
+	ATH_AHB,
+	ATH_USB,
+};
+
 struct reg_dmn_pair_mapping {
 	u16 regDmnEnum;
 	u16 reg_5ghz_ctl;
@@ -73,6 +79,7 @@ struct ath_ops {
 struct ath_common;
 
 struct ath_bus_ops {
+	enum ath_bus_type ath_bus_type;
 	void (*read_cachesize)(struct ath_common *common, int *csz);
 	bool (*eeprom_read)(struct ath_common *common, u32 off, u16 *data);
 	void (*bt_coex_prep)(struct ath_common *common);

drivers/net/wireless/ath/ath9k/ahb.c

@@ -47,6 +47,7 @@ static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data)
 }
 
 static struct ath_bus_ops ath_ahb_bus_ops  = {
+	.ath_bus_type = ATH_AHB,
 	.read_cachesize = ath_ahb_read_cachesize,
 	.eeprom_read = ath_ahb_eeprom_read,
 };

drivers/net/wireless/ath/ath9k/htc_drv_init.c

@@ -287,6 +287,7 @@ static bool ath_usb_eeprom_read(struct ath_common *common, u32 off, u16 *data)
 }
 
 static const struct ath_bus_ops ath9k_usb_bus_ops = {
+	.ath_bus_type = ATH_USB,
 	.read_cachesize = ath_usb_read_cachesize,
 	.eeprom_read = ath_usb_eeprom_read,
 };

drivers/net/wireless/ath/ath9k/pci.c

@@ -88,6 +88,7 @@ static void ath_pci_bt_coex_prep(struct ath_common *common)
 }
 
 static const struct ath_bus_ops ath_pci_bus_ops = {
+	.ath_bus_type = ATH_PCI,
 	.read_cachesize = ath_pci_read_cachesize,
 	.eeprom_read = ath_pci_eeprom_read,
 	.bt_coex_prep = ath_pci_bt_coex_prep,