linux-kernel - [PATCH 1/3] arm64: dts: qcom: sc8280xp: Fix PCIe PHY power-domains

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Date: Wed, 27 Dec 2023 23:28:26 +0100
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>, 
 Rob Herring <robh+dt@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, Johan Hovold <johan+linaro@...nel.org>
Cc: Marijn Suijten <marijn.suijten@...ainline.org>, 
 linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>, 
 Konrad Dybcio <konrad.dybcio@...ainline.org>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>
Subject: [PATCH 1/3] arm64: dts: qcom: sc8280xp: Fix PCIe PHY power-domains

The PCIe GDSCs are only related to the RCs. The PCIe PHYs on the other
hand, are powered by VDD_MX and their specific VDDA_PHY/PLL regulators.

Fix the power-domains assignment to stop potentially toggling the GDSC
unnecessarily.

Fixes: 813e83157001 ("arm64: dts: qcom: sc8280xp/sa8540p: add PCIe2-4 nodes")
Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
 arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
index febf28356ff8..72c5818b67f2 100644
--- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
@@ -1797,7 +1797,7 @@ pcie4_phy: phy@...6000 {
 			assigned-clocks = <&gcc GCC_PCIE4_PHY_RCHNG_CLK>;
 			assigned-clock-rates = <100000000>;
 
-			power-domains = <&gcc PCIE_4_GDSC>;
+			power-domains = <&rpmhpd SC8280XP_MX>;
 
 			resets = <&gcc GCC_PCIE_4_PHY_BCR>;
 			reset-names = "phy";
@@ -1895,7 +1895,7 @@ pcie3b_phy: phy@...e000 {
 			assigned-clocks = <&gcc GCC_PCIE3B_PHY_RCHNG_CLK>;
 			assigned-clock-rates = <100000000>;
 
-			power-domains = <&gcc PCIE_3B_GDSC>;
+			power-domains = <&rpmhpd SC8280XP_MX>;
 
 			resets = <&gcc GCC_PCIE_3B_PHY_BCR>;
 			reset-names = "phy";
@@ -1994,7 +1994,7 @@ pcie3a_phy: phy@...4000 {
 			assigned-clocks = <&gcc GCC_PCIE3A_PHY_RCHNG_CLK>;
 			assigned-clock-rates = <100000000>;
 
-			power-domains = <&gcc PCIE_3A_GDSC>;
+			power-domains = <&rpmhpd SC8280XP_MX>;
 
 			resets = <&gcc GCC_PCIE_3A_PHY_BCR>;
 			reset-names = "phy";
@@ -2094,7 +2094,7 @@ pcie2b_phy: phy@...e000 {
 			assigned-clocks = <&gcc GCC_PCIE2B_PHY_RCHNG_CLK>;
 			assigned-clock-rates = <100000000>;
 
-			power-domains = <&gcc PCIE_2B_GDSC>;
+			power-domains = <&rpmhpd SC8280XP_MX>;
 
 			resets = <&gcc GCC_PCIE_2B_PHY_BCR>;
 			reset-names = "phy";
@@ -2193,7 +2193,7 @@ pcie2a_phy: phy@...4000 {
 			assigned-clocks = <&gcc GCC_PCIE2A_PHY_RCHNG_CLK>;
 			assigned-clock-rates = <100000000>;
 
-			power-domains = <&gcc PCIE_2A_GDSC>;
+			power-domains = <&rpmhpd SC8280XP_MX>;
 
 			resets = <&gcc GCC_PCIE_2A_PHY_BCR>;
 			reset-names = "phy";

-- 
2.43.0