3 files changed, 31 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_hw.c b/drivers/net/wireless/ath/ath9k/ar9003_hw.c
index 738aa7e..582cddd 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_hw.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_hw.c
@@ -745,6 +745,20 @@ static void ar9003_hw_init_mode_gain_regs(struct ath_hw *ah)
 static void ar9003_hw_configpcipowersave(struct ath_hw *ah,
 					 bool power_off)
 {
+	/*
+	 * Increase L1 Entry Latency. Some WB222 boards don't have
+	 * this change in eeprom/OTP.
+	 *
+	 */
+	if (AR_SREV_9462(ah)) {
+		u32 val = ah->config.aspm_l1_fix;
+		if ((val & 0xff000000) == 0x17000000) {
+			val &= 0x00ffffff;
+			val |= 0x27000000;
+			REG_WRITE(ah, 0x570c, val);
+		}
+	}
+
 	/* Nothing to do on restore for 11N */
 	if (!power_off /* !restore */) {
 		/* set bit 19 to allow forcing of pcie core into L1 state */
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index fa543a6..69a907b 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -311,6 +311,7 @@ struct ath9k_ops_config {
 	u16 ani_poll_interval; /* ANI poll interval in ms */
 
 	/* Platform specific config */
+	u32 aspm_l1_fix;
 	u32 xlna_gpio;
 	u32 ant_ctrl_comm2g_switch_enable;
 	bool xatten_margin_cfg;
diff --git a/drivers/net/wireless/ath/ath9k/pci.c b/drivers/net/wireless/ath/ath9k/pci.c
index 3280798..e7996a6 100644
--- a/drivers/net/wireless/ath/ath9k/pci.c
+++ b/drivers/net/wireless/ath/ath9k/pci.c
@@ -314,6 +314,22 @@ static void ath_pci_aspm_init(struct ath_common *common)
 		return;
 	}
 
+	/*
+	 * 0x70c - Ack Frequency Register.
+	 *
+	 * Bits 27:29 - DEFAULT_L1_ENTRANCE_LATENCY.
+	 *
+	 * 000 : 1 us
+	 * 001 : 2 us
+	 * 010 : 4 us
+	 * 011 : 8 us
+	 * 100 : 16 us
+	 * 101 : 32 us
+	 * 110/111 : 64 us
+	 */
+	if (AR_SREV_9462(ah))
+		pci_read_config_dword(pdev, 0x70c, &ah->config.aspm_l1_fix);
+
 	pcie_capability_read_word(parent, PCI_EXP_LNKCTL, &aspm);
 	if (aspm & (PCI_EXP_LNKCTL_ASPM_L0S | PCI_EXP_LNKCTL_ASPM_L1)) {
 		ah->aspm_enabled = true;