linux-kernel - [PATCH 1/2] clk: gcc-sc8280xp: keep PCIe power-domains always-on

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Date:   Fri,  5 Aug 2022 14:12:49 +0200
From:   Johan Hovold <johan+linaro@...nel.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        Johan Hovold <johan+linaro@...nel.org>
Subject: [PATCH 1/2] clk: gcc-sc8280xp: keep PCIe power-domains always-on

The Qualcomm PCIe driver does not yet implement suspend so to keep the
PCIe power domains always-on for now to avoid crashing during resume.

Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
---
 drivers/clk/qcom/gcc-sc8280xp.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/clk/qcom/gcc-sc8280xp.c b/drivers/clk/qcom/gcc-sc8280xp.c
index a2f3ffcc5849..eaeada42e13a 100644
--- a/drivers/clk/qcom/gcc-sc8280xp.c
+++ b/drivers/clk/qcom/gcc-sc8280xp.c
@@ -6768,6 +6768,10 @@ static struct gdsc pcie_1_tunnel_gdsc = {
 	.flags = VOTABLE,
 };
 
+/*
+ * The Qualcomm PCIe driver does not yet implement suspend so to keep the
+ * PCIe power domains always-on for now.
+ */
 static struct gdsc pcie_2a_gdsc = {
 	.gdscr = 0x9d004,
 	.collapse_ctrl = 0x52128,
@@ -6776,7 +6780,7 @@ static struct gdsc pcie_2a_gdsc = {
 		.name = "pcie_2a_gdsc",
 	},
 	.pwrsts = PWRSTS_OFF_ON,
-	.flags = VOTABLE,
+	.flags = VOTABLE | ALWAYS_ON,
 };
 
 static struct gdsc pcie_2b_gdsc = {
@@ -6787,7 +6791,7 @@ static struct gdsc pcie_2b_gdsc = {
 		.name = "pcie_2b_gdsc",
 	},
 	.pwrsts = PWRSTS_OFF_ON,
-	.flags = VOTABLE,
+	.flags = VOTABLE | ALWAYS_ON,
 };
 
 static struct gdsc pcie_3a_gdsc = {
@@ -6798,7 +6802,7 @@ static struct gdsc pcie_3a_gdsc = {
 		.name = "pcie_3a_gdsc",
 	},
 	.pwrsts = PWRSTS_OFF_ON,
-	.flags = VOTABLE,
+	.flags = VOTABLE | ALWAYS_ON,
 };
 
 static struct gdsc pcie_3b_gdsc = {
@@ -6809,7 +6813,7 @@ static struct gdsc pcie_3b_gdsc = {
 		.name = "pcie_3b_gdsc",
 	},
 	.pwrsts = PWRSTS_OFF_ON,
-	.flags = VOTABLE,
+	.flags = VOTABLE | ALWAYS_ON,
 };
 
 static struct gdsc pcie_4_gdsc = {
@@ -6820,7 +6824,7 @@ static struct gdsc pcie_4_gdsc = {
 		.name = "pcie_4_gdsc",
 	},
 	.pwrsts = PWRSTS_OFF_ON,
-	.flags = VOTABLE,
+	.flags = VOTABLE | ALWAYS_ON,
 };
 
 static struct gdsc ufs_card_gdsc = {
-- 
2.35.1