ath9k_hw: enable PCIe low power mode for AR9003

Cc: Paul Shaw <paul.shaw@atheros.com>
Cc: Don Breslin <don.breslin@atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 8f37f1c2a380..f2d0389a66c0 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -573,6 +573,26 @@ static int __ath9k_hw_init(struct ath_hw *ah)
 
         ath9k_hw_init_mode_regs(ah);
 
+        /*
+         * Configire PCIE after Ini init. SERDES values now come from ini file
+         * This enables PCIe low power mode.
+         */
+        if (AR_SREV_9300_20_OR_LATER(ah)) {
+                u32 regval;
+                unsigned int i;
+
+                /* Set Bits 16 and 17 in the AR_WA register. */
+                regval = REG_READ(ah, AR_WA);
+                regval |= 0x00030000;
+                REG_WRITE(ah, AR_WA, regval);
+
+                for (i = 0; i < ah->iniPcieSerdesLowPower.ia_rows; i++) {
+                        REG_WRITE(ah,
+                                  INI_RA(&ah->iniPcieSerdesLowPower, i, 0),
+                                  INI_RA(&ah->iniPcieSerdesLowPower, i, 1));
+                }
+        }
+
         if (ah->is_pciexpress)
                 ath9k_hw_configpcipowersave(ah, 0, 0);
         else