linux-kernel - [PATCH 5/7] clk: qcom: gcc-qcs8300: Do not turn off PCIe GDSCs during gdsc

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Message-Id: <20260102-pci_gdsc_fix-v1-5-b17ed3d175bc@oss.qualcomm.com>
Date: Fri, 02 Jan 2026 15:13:05 +0530
From: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, Taniya Das <quic_tdas@...cinc.com>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Bartosz Golaszewski <brgl@...nel.org>,
        Shazad Hussain <quic_shazhuss@...cinc.com>,
        Sibi Sankar <sibi.sankar@....qualcomm.com>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Melody Olvera <quic_molvera@...cinc.com>,
        Dmitry Baryshkov <lumag@...nel.org>,
        Taniya Das <taniya.das@....qualcomm.com>,
        Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        Imran Shaik <quic_imrashai@...cinc.com>,
        Abel Vesa <abelvesa@...nel.org>, Abel Vesa <abelvesa@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Rajendra Nayak <quic_rjendra@...cinc.com>,
        manivannan.sadhasivam@....qualcomm.com,
        Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>,
        stable@...r.kernel.org
Subject: [PATCH 5/7] clk: qcom: gcc-qcs8300: Do not turn off PCIe GDSCs
 during gdsc_disable()

With PWRSTS_OFF_ON, PCIe GDSCs are turned off during gdsc_disable(). This
can happen during scenarios such as system suspend and breaks the resume
of PCIe controllers from suspend.

So use PWRSTS_RET_ON to indicate the GDSC driver to not turn off the GDSCs
during gdsc_disable() and allow the hardware to transition the GDSCs to
retention when the parent domain enters low power state during system
suspend.

Fixes: 95eeb2ffce73 ("clk: qcom: Add support for Global Clock Controller on QCS8300")
Cc: stable@...r.kernel.org
Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
---
 drivers/clk/qcom/gcc-qcs8300.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/qcom/gcc-qcs8300.c b/drivers/clk/qcom/gcc-qcs8300.c
index 80831c7dea3bcde0ced46054783df02b07a985db..009672b75fb9099cb0c6db7af3863654f2fa6648 100644
--- a/drivers/clk/qcom/gcc-qcs8300.c
+++ b/drivers/clk/qcom/gcc-qcs8300.c
@@ -3268,7 +3268,7 @@ static struct gdsc gcc_pcie_0_gdsc = {
 	.pd = {
 		.name = "gcc_pcie_0_gdsc",
 	},
-	.pwrsts = PWRSTS_OFF_ON,
+	.pwrsts = PWRSTS_RET_ON,
 	.flags = VOTABLE | RETAIN_FF_ENABLE | POLL_CFG_GDSCR,
 };
 
@@ -3282,7 +3282,7 @@ static struct gdsc gcc_pcie_1_gdsc = {
 	.pd = {
 		.name = "gcc_pcie_1_gdsc",
 	},
-	.pwrsts = PWRSTS_OFF_ON,
+	.pwrsts = PWRSTS_RET_ON,
 	.flags = VOTABLE | RETAIN_FF_ENABLE | POLL_CFG_GDSCR,
 };
 

-- 
2.34.1