Signed-off-by: Luis R. Rodriguez <lrodriguez@xxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/hw.c | 34 ++++++++++++++++++++++++++++++++++
1 files changed, 34 insertions(+), 0 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index f0a0467..8f47b7d 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -2627,6 +2627,37 @@ enum ath9k_int ath9k_hw_set_interrupts(struct ath_hw *ah, enum ath9k_int ints)
}
EXPORT_SYMBOL(ath9k_hw_set_interrupts);
+/*
+ * Helper for ASPM support.
+ *
+ * Disable PLL when in L0s as well as receiver clock when in L1.
+ * This power saving option must be enabled through the SerDes.
+ *
+ * Programming the SerDes must go through the same 288 bit serial shift
+ * register as the other analog registers. Hence the 9 writes.
+ */
+static void ar9003_hw_configpcipowersave(struct ath_hw *ah,
+ int restore,
+ int power_off)
+{
+ if (ah->is_pciexpress != true)
+ return;
+
+ /* Do not touch SerDes registers */
+ if (ah->config.pcie_powersave_enable == 2)
+ return;
+
+ /* Nothing to do on restore for 11N */
+ if (!restore) {
+ /* set bit 19 to allow forcing of pcie core into L1 state */
+ REG_SET_BIT(ah, AR_PCIE_PM_CTRL, AR_PCIE_PM_CTRL_ENA);
+
+ /* Several PCIe massages to ensure proper behaviour */
+ if (ah->config.pcie_waen)
+ REG_WRITE(ah, AR_WA, ah->config.pcie_waen);
+ }
+}
+
/*******************/
/* Beacon Handling */
/*******************/
@@ -3665,10 +3696,13 @@ static void ar9002_hw_attach_ops(struct ath_hw *ah)
static void ar9003_hw_attach_ops(struct ath_hw *ah)
{
struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah);
+ struct ath_hw_ops *ops = ath9k_hw_ops(ah);
priv_ops->init_mode_regs = ar9003_hw_init_mode_regs;
priv_ops->macversion_supported = ar9003_hw_macversion_supported;
+ ops->config_pci_powersave = ar9003_hw_configpcipowersave;
+
ar9003_hw_attach_phy_ops(ah);
ar9003_hw_attach_calib_ops(ah);
ar9003_hw_attach_mac_ops(ah);
--
1.6.3.3
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