ath9k: Store the correct max TX power level
This patch fixes a bug where the max power level
was being calculated incorrectly.
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/eeprom.c b/drivers/net/wireless/ath9k/eeprom.c
index b55e992..34e9d81 100644
--- a/drivers/net/wireless/ath9k/eeprom.c
+++ b/drivers/net/wireless/ath9k/eeprom.c
@@ -2615,6 +2615,21 @@
else
ah->regulatory.max_power_level = ratesArray[i];
+ switch(ar5416_get_ntxchains(ah->txchainmask)) {
+ case 1:
+ break;
+ case 2:
+ ah->regulatory.max_power_level += INCREASE_MAXPOW_BY_TWO_CHAIN;
+ break;
+ case 3:
+ ah->regulatory.max_power_level += INCREASE_MAXPOW_BY_THREE_CHAIN;
+ break;
+ default:
+ DPRINTF(ah->ah_sc, ATH_DBG_EEPROM,
+ "Invalid chainmask configuration\n");
+ break;
+ }
+
return 0;
}
diff --git a/drivers/net/wireless/ath9k/eeprom.h b/drivers/net/wireless/ath9k/eeprom.h
index 99863b5..b7c656c84b 100644
--- a/drivers/net/wireless/ath9k/eeprom.h
+++ b/drivers/net/wireless/ath9k/eeprom.h
@@ -75,6 +75,9 @@
#define SUB_NUM_CTL_MODES_AT_5G_40 2
#define SUB_NUM_CTL_MODES_AT_2G_40 3
+#define INCREASE_MAXPOW_BY_TWO_CHAIN 6 /* 10*log10(2)*2 */
+#define INCREASE_MAXPOW_BY_THREE_CHAIN 10 /* 10*log10(3)*2 */
+
#define AR_EEPROM_MAC(i) (0x1d+(i))
#define ATH9K_POW_SM(_r, _s) (((_r) & 0x3f) << (_s))
#define FREQ2FBIN(x, y) ((y) ? ((x) - 2300) : (((x) - 4800) / 5))