ath9k_hw: INI changes for WoW for AR9002 chipsets

for AR9002 family of chipsets and for WoW sleep, we reprogram
the SerDes so that the PLL and CHK REQ are both enabled. this
uses more power but in certain cases this is required as otherwise
WoW sleep is unstable and chip may disappear.

Cc: Senthil Balasubramanian <senthilb@qca.qualcomm.com>
Cc: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Cc: vadivel@qca.qualcomm.com
Signed-off-by: Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/ar9002_hw.c

@@ -43,6 +43,11 @@ static void ar9002_hw_init_mode_regs(struct ath_hw *ah)
 		INIT_INI_ARRAY(&ah->iniPcieSerdes,
 			   ar9280PciePhy_clkreq_always_on_L1_9280,
 			   ARRAY_SIZE(ar9280PciePhy_clkreq_always_on_L1_9280), 2);
+#ifdef CONFIG_PM_SLEEP
+		INIT_INI_ARRAY(&ah->iniPcieSerdesWow,
+			       ar9280PciePhy_awow,
+			       ARRAY_SIZE(ar9280PciePhy_awow), 2);
+#endif
 
 	if (AR_SREV_9287_11_OR_LATER(ah)) {
 		INIT_INI_ARRAY(&ah->iniModes, ar9287Modes_9287_1_1,

drivers/net/wireless/ath/ath9k/ar9002_initvals.h

@@ -925,6 +925,20 @@ static const u32 ar9280PciePhy_clkreq_always_on_L1_9280[][2] = {
 	{0x00004044, 0x00000000},
 };
 
+static const u32 ar9280PciePhy_awow[][2] = {
+	/* Addr      allmodes  */
+	{0x00004040, 0x9248fd00},
+	{0x00004040, 0x24924924},
+	{0x00004040, 0xa8000019},
+	{0x00004040, 0x13160820},
+	{0x00004040, 0xe5980560},
+	{0x00004040, 0xc01dcffd},
+	{0x00004040, 0x1aaabe41},
+	{0x00004040, 0xbe105554},
+	{0x00004040, 0x00043007},
+	{0x00004044, 0x00000000},
+};
+
 static const u32 ar9285Modes_9285_1_2[][5] = {
 	/* Addr      5G_HT20     5G_HT40     2G_HT40     2G_HT20   */
 	{0x00001030, 0x00000230, 0x00000460, 0x000002c0, 0x00000160},

drivers/net/wireless/ath/ath9k/hw.h

@@ -860,6 +860,9 @@ struct ath_hw {
 	struct ar5416IniArray iniBank7;
 	struct ar5416IniArray iniAddac;
 	struct ar5416IniArray iniPcieSerdes;
+#ifdef CONFIG_PM_SLEEP
+	struct ar5416IniArray iniPcieSerdesWow;
+#endif
 	struct ar5416IniArray iniPcieSerdesLowPower;
 	struct ar5416IniArray iniModesFastClock;
 	struct ar5416IniArray iniAdditional;