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Hamoa had the software workaround added due to hardware register bug mentioned in commit [1] which used Hamoa/X1E80100 compatible to apply the workaround. As the hardware bug mentioned in [1] is fixed on purwa silicon add purwa compatible to avoid applying workaround meant for hamoa. Patch 1 (dt-bindings) is independent and can be merged. Patch 2 (irqchip driver) depends on patch 1. Patch 3 (DTS) depends on patches 1 and 2 landing in mainline first, as Purwa CRD boards wired up GPIO wakeup support enabled by series [2]. For stable backporting, only patch 3 is needed: since series [2] is not backported to stable kernels, there is no GPIO wired up for wakeup and patch 3 alone is sufficient to stop the Hamoa hardware workaround from being applied on Purwa. [1] https://lore.kernel.org/all/20250218-x1e80100-pdc-hw-wa-v2-1-29be4c98e355@linaro.org/ [2] https://lore.kernel.org/linux-arm-msm/CAMRc=MeU0QuRozMscv02M59+a66S05Jm18CyvNE-qSYrY=S7hQ@mail.gmail.com/ --- Changes in v4: - Reorder: move irqchip driver patch before DTS patch - Clarify dependency on mainline in cover letter - Clarify backporting to stable kernel in cover letter - Fix typo: "puwra" -> "purwa" and "sillicon" -> "silicon" in irqchip patch - Link to v3: https://patch.msgid.link/20260715-purwa-pdc-v3-0-be08934dc916@oss.qualcomm.com Changes in v3: - Remove the dependency (b4 prerequisite-patch-id) as dependency is merged - Rebase, Add reviewed-by, acked-by tags for first two changes - Link to v2: https://patch.msgid.link/20260616-purwa-pdc-v2-0-8dda7ef25ce5@oss.qualcomm.com Changes in v2: - Remove Fixes tag from bindings - Rename $subject to use hamoa and purwa name - Add comment above compatible in devicetree - Rebase and mark dependency - Add new change to invoke SMC call for purwa PDC mode setting - Link to v1: https://lore.kernel.org/r/20251231-purwa_pdc-v1-0-2b4979dd88ad@oss.qualcomm.com --- To: Thomas Gleixner To: Rob Herring To: Krzysztof Kozlowski To: Conor Dooley To: Bjorn Andersson To: Konrad Dybcio To: Radu Rendec Cc: linux-arm-msm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: devicetree@vger.kernel.org Cc: Konrad Dybcio Signed-off-by: Maulik Shah --- Maulik Shah (3): dt-bindings: interrupt-controller: qcom,pdc: Document Purwa PDC irqchip/qcom-pdc: Add purwa compatible for PDC secondary mode arm64: dts: qcom: purwa: Drop the Hamoa workaround for PDC Documentation/devicetree/bindings/interrupt-controller/qcom,pdc.yaml | 1 + arch/arm64/boot/dts/qcom/purwa.dtsi | 5 +++++ drivers/irqchip/qcom-pdc.c | 3 +++ 3 files changed, 9 insertions(+) --- base-commit: 0f6da28aab51b16762ed82e8fdeaa5042da45b08 change-id: 20260616-purwa-pdc-198063b482b9 Best regards, -- Maulik Shah