ath9k_hw: support reading calibration data from flash on AR9003

Embedded boards do not have compressed EEPROM data, they use the
struct ar9003_eeprom layout, with little endian fields, so copying
the raw data to the eeprom buffer is enough.

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

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
index 230a1228de8e..9a7e151f0796 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
@@ -3271,6 +3271,18 @@ static bool ar9300_check_eeprom_header(struct ath_hw *ah, eeprom_read_op read,
         return ar9300_check_header(header);
 }
 
+static int ar9300_eeprom_restore_flash(struct ath_hw *ah, u8 *mptr,
+                                       int mdata_size)
+{
+        struct ath_common *common = ath9k_hw_common(ah);
+        u16 *data = (u16 *) mptr;
+        int i;
+
+        for (i = 0; i < mdata_size / 2; i++, data++)
+                ath9k_hw_nvram_read(common, i, data);
+
+        return 0;
+}
 /*
  * Read the configuration data from the eeprom.
  * The data can be put in any specified memory buffer.
@@ -3293,6 +3305,9 @@ static int ar9300_eeprom_restore_internal(struct ath_hw *ah,
         struct ath_common *common = ath9k_hw_common(ah);
         eeprom_read_op read;
 
+        if (ath9k_hw_use_flash(ah))
+                return ar9300_eeprom_restore_flash(ah, mptr, mdata_size);
+
         word = kzalloc(2048, GFP_KERNEL);
         if (!word)
                 return -1;