ath9k: add support for overriding the MAC address through platform data

On some devices the correct MAC address is not in the EEPROM data, but
stored somewhere else.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 7 insertions, 1 deletions

diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index 79aec983279f..e22e8215d941 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -15,6 +15,7 @@
  */
 
 #include <linux/slab.h>
+#include <linux/ath9k_platform.h>
 
 #include "ath9k.h"
 
@@ -537,6 +538,7 @@ static void ath9k_init_misc(struct ath_softc *sc)
 static int ath9k_init_softc(u16 devid, struct ath_softc *sc, u16 subsysid,
                             const struct ath_bus_ops *bus_ops)
 {
+        struct ath9k_platform_data *pdata = sc->dev->platform_data;
         struct ath_hw *ah = NULL;
         struct ath_common *common;
         int ret = 0, i;
@@ -551,7 +553,7 @@ static int ath9k_init_softc(u16 devid, struct ath_softc *sc, u16 subsysid,
         ah->hw_version.subsysid = subsysid;
         sc->sc_ah = ah;
 
-        if (!sc->dev->platform_data)
+        if (!pdata)
                 ah->ah_flags |= AH_USE_EEPROM;
 
         common = ath9k_hw_common(ah);
@@ -587,6 +589,9 @@ static int ath9k_init_softc(u16 devid, struct ath_softc *sc, u16 subsysid,
         if (ret)
                 goto err_hw;
 
+        if (pdata && pdata->macaddr)
+                memcpy(common->macaddr, pdata->macaddr, ETH_ALEN);
+
         ret = ath9k_init_queues(sc);
         if (ret)
                 goto err_queues;
diff --git a/include/linux/ath9k_platform.h b/include/linux/ath9k_platform.h
index b847fc7b93f9..b5f06583a1ba 100644
--- a/include/linux/ath9k_platform.h
+++ b/include/linux/ath9k_platform.h
@@ -23,6 +23,7 @@
 
 struct ath9k_platform_data {
         u16 eeprom_data[ATH9K_PLAT_EEP_MAX_WORDS];
+        u8 *macaddr;
 };
 
 #endif /* _LINUX_ATH9K_PLATFORM_H */