linux-kernel - [PATCH 2/2] arm64: dts: qcom: purwa: Drop the Hamoa workaround for PDC

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Message-Id: <20251231-purwa_pdc-v1-2-2b4979dd88ad@oss.qualcomm.com>
Date: Wed, 31 Dec 2025 15:48:46 +0530
From: Maulik Shah <maulik.shah@....qualcomm.com>
To: Thomas Gleixner <tglx@...utronix.de>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>,
        Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Maulik Shah <maulik.shah@....qualcomm.com>
Subject: [PATCH 2/2] arm64: dts: qcom: purwa: Drop the Hamoa workaround for
 PDC

Purwa shares the Hamoa (X1E80100) PDC device, but the hardware register
bug addressed in commit e9a48ea4d90b ("irqchip/qcom-pdc: Workaround
hardware register bug on X1E80100") is already fixed in Purwa silicon.

Hamoa compatible forces the software workaround. Use the Purwa specific
compatible string for the PDC node to remove the workaround from Purwa.

Fixes: f08edb529916 ("arm64: dts: qcom: Add X1P42100 SoC and CRD")
Signed-off-by: Maulik Shah <maulik.shah@....qualcomm.com>
---
 arch/arm64/boot/dts/qcom/purwa.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/purwa.dtsi b/arch/arm64/boot/dts/qcom/purwa.dtsi
index 2cecd2dd0de8c39f0702d6983bead2bc2adccf9b..e3e2dfedf0b3cad90b767d6b28fb0c60078d192b 100644
--- a/arch/arm64/boot/dts/qcom/purwa.dtsi
+++ b/arch/arm64/boot/dts/qcom/purwa.dtsi
@@ -152,6 +152,10 @@ &pcie6a_phy {
 	compatible = "qcom,x1p42100-qmp-gen4x4-pcie-phy";
 };
 
+&pdc {
+	compatible = "qcom,x1p42100-pdc", "qcom,pdc";
+};
+
 &qfprom {
 	gpu_speed_bin: gpu-speed-bin@119 {
 		reg = <0x119 0x2>;

-- 
2.34.1