diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/pci.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/pci.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/pci.c b/drivers/net/wireless/ath/ath9k/pci.c index 3bad0b2cf9a..be4ea132981 100644 --- a/drivers/net/wireless/ath/ath9k/pci.c +++ b/drivers/net/wireless/ath/ath9k/pci.c @@ -16,6 +16,7 @@ #include <linux/nl80211.h> #include <linux/pci.h> +#include <linux/pci-aspm.h> #include <linux/ath9k_platform.h> #include "ath9k.h" @@ -115,12 +116,38 @@ static void ath_pci_extn_synch_enable(struct ath_common *common) pci_write_config_byte(pdev, sc->sc_ah->caps.pcie_lcr_offset, lnkctl); } +static void ath_pci_aspm_init(struct ath_common *common) +{ + struct ath_softc *sc = (struct ath_softc *) common->priv; + struct ath_hw *ah = sc->sc_ah; + struct pci_dev *pdev = to_pci_dev(sc->dev); + struct pci_dev *parent; + int pos; + u8 aspm; + + if (!pci_is_pcie(pdev)) + return; + + parent = pdev->bus->self; + if (WARN_ON(!parent)) + return; + + pos = pci_pcie_cap(parent); + pci_read_config_byte(parent, pos + PCI_EXP_LNKCTL, &aspm); + if (aspm & (PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1)) { + ah->aspm_enabled = true; + /* Initialize PCIe PM and SERDES registers. */ + ath9k_hw_configpcipowersave(ah, 0, 0); + } +} + static const struct ath_bus_ops ath_pci_bus_ops = { .ath_bus_type = ATH_PCI, .read_cachesize = ath_pci_read_cachesize, .eeprom_read = ath_pci_eeprom_read, .bt_coex_prep = ath_pci_bt_coex_prep, .extn_synch_en = ath_pci_extn_synch_enable, + .aspm_init = ath_pci_aspm_init, }; static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) |