diff options
| author | Chin-Yen Lee <timlee@realtek.com> | 2021-07-27 13:05:03 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2021-08-21 22:18:45 +0300 |
| commit | 8d52b46caf6846b549198c3fca7a1e3312322c12 (patch) | |
| tree | 89c4d2565fef0f34935389ee22ea8c1365e32b6c /drivers/net/wireless | |
| parent | 0c283b47539ab11f9efb46800f2a9dd63a48d825 (diff) | |
| download | linux-8d52b46caf6846b549198c3fca7a1e3312322c12.tar.xz | |
rtw88: 8822ce: set CLKREQ# signal to low during suspend
We find the power sequence of system suspend flow don't meet
the criteria when using 8822CE-VR chip by rfe-type 6, because the
reference clock form host is sometimes late. To avoid the behavoir,
we keep CLKREQ# signal to low during suspend to make sure the reference
clock arrival in time.
Signed-off-by: Chin-Yen Lee <timlee@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210727100503.31626-1-pkshih@realtek.com
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/realtek/rtw88/pci.c | 33 | ||||
| -rw-r--r-- | drivers/net/wireless/realtek/rtw88/pci.h | 1 |
2 files changed, 34 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtw88/pci.c b/drivers/net/wireless/realtek/rtw88/pci.c index e7d17ab8f113..0f95a9555aea 100644 --- a/drivers/net/wireless/realtek/rtw88/pci.c +++ b/drivers/net/wireless/realtek/rtw88/pci.c @@ -1359,6 +1359,25 @@ static void rtw_pci_clkreq_set(struct rtw_dev *rtwdev, bool enable) rtw_dbi_write8(rtwdev, RTK_PCIE_LINK_CFG, value); } +static void rtw_pci_clkreq_pad_low(struct rtw_dev *rtwdev, bool enable) +{ + u8 value; + int ret; + + ret = rtw_dbi_read8(rtwdev, RTK_PCIE_LINK_CFG, &value); + if (ret) { + rtw_err(rtwdev, "failed to read CLKREQ_L1, ret=%d", ret); + return; + } + + if (enable) + value &= ~BIT_CLKREQ_N_PAD; + else + value |= BIT_CLKREQ_N_PAD; + + rtw_dbi_write8(rtwdev, RTK_PCIE_LINK_CFG, value); +} + static void rtw_pci_aspm_set(struct rtw_dev *rtwdev, bool enable) { u8 value; @@ -1500,11 +1519,25 @@ static void rtw_pci_phy_cfg(struct rtw_dev *rtwdev) static int __maybe_unused rtw_pci_suspend(struct device *dev) { + struct ieee80211_hw *hw = dev_get_drvdata(dev); + struct rtw_dev *rtwdev = hw->priv; + struct rtw_chip_info *chip = rtwdev->chip; + struct rtw_efuse *efuse = &rtwdev->efuse; + + if (chip->id == RTW_CHIP_TYPE_8822C && efuse->rfe_option == 6) + rtw_pci_clkreq_pad_low(rtwdev, true); return 0; } static int __maybe_unused rtw_pci_resume(struct device *dev) { + struct ieee80211_hw *hw = dev_get_drvdata(dev); + struct rtw_dev *rtwdev = hw->priv; + struct rtw_chip_info *chip = rtwdev->chip; + struct rtw_efuse *efuse = &rtwdev->efuse; + + if (chip->id == RTW_CHIP_TYPE_8822C && efuse->rfe_option == 6) + rtw_pci_clkreq_pad_low(rtwdev, false); return 0; } diff --git a/drivers/net/wireless/realtek/rtw88/pci.h b/drivers/net/wireless/realtek/rtw88/pci.h index 0ffae887527a..66f78eb7757c 100644 --- a/drivers/net/wireless/realtek/rtw88/pci.h +++ b/drivers/net/wireless/realtek/rtw88/pci.h @@ -37,6 +37,7 @@ #define RTK_PCIE_LINK_CFG 0x0719 #define BIT_CLKREQ_SW_EN BIT(4) #define BIT_L1_SW_EN BIT(3) +#define BIT_CLKREQ_N_PAD BIT(0) #define RTK_PCIE_CLKDLY_CTRL 0x0725 #define BIT_PCI_BCNQ_FLAG BIT(4) |