[PATCH 6.18 282/752] wifi: rtw89: pci: restore LDO setting after device resume

Sasha Levin
2026-02-28T17:52:04Z

From: Dian-Syuan Yang <dian_syuan0116@realtek.com>

[ Upstream commit af1e82232b988f8fc6d635c60609765e49221a64 ]

The LDO (Low Dropout Regulator) setting is missing after suspend/resume
in some platforms, and it will cause card loss. Therefore, reconfigure
this setting to avoid it.

Signed-off-by: Dian-Syuan Yang <dian_syuan0116@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20260127085036.44060-6-pkshih@realtek.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/realtek/rtw89/pci.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/realtek/rtw89/pci.c b/drivers/net/wireless/realtek/rtw89/pci.c
index f7be5e7e0a37c..6be1849b0c4d2 100644
--- a/drivers/net/wireless/realtek/rtw89/pci.c
+++ b/drivers/net/wireless/realtek/rtw89/pci.c
@@ -4591,6 +4591,7 @@ static int __maybe_unused rtw89_pci_resume(struct device *dev)
rtw89_write32_clr(rtwdev, R_AX_PCIE_PS_CTRL_V1,
B_AX_SEL_REQ_ENTR_L1);
}
+ rtw89_pci_hci_ldo(rtwdev);
rtw89_pci_l2_hci_ldo(rtwdev);

rtw89_pci_basic_cfg(rtwdev, true);
--
2.51.0