linux-kernel - [PATCH v3 0/3] arm64: dts: qcom: x1e80100: Enable APSS watchdog in EL2

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Message-Id: <20251224-arm64-dts-qcom-x1e80100-el2-add-apss-wdt-v3-0-1801c55d2883@oss.qualcomm.com>
Date: Wed, 24 Dec 2025 12:45:19 +0200
From: Abel Vesa <abel.vesa@....qualcomm.com>
To: Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Rajendra Nayak <quic_rjendra@...cinc.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>
Cc: Stephan Gerhold <stephan.gerhold@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-watchdog@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Abel Vesa <abel.vesa@....qualcomm.com>,
        Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Subject: [PATCH v3 0/3] arm64: dts: qcom: x1e80100: Enable APSS watchdog in
 EL2

On X1E80100 platforms, in EL2, the APSS watchdog is accessible.
The APSS WDT HW is compatible with the one from SC8280XP, SM8250 and the
like. So describe it in the SoC dtsi, mark it as reserved and enable it
the EL2 overlay. Also document its compatible.

Signed-off-by: Abel Vesa <abel.vesa@....qualcomm.com>
---
Changes in v3:
- Change the comment for the reserved status in the SoC dtsi node
  according to Konrad's suggestion.
- Picked up Rob's R-b tag and Guenter's A-b tag for the bindings patch
- Picked up Dmitry's R-b tag for the dtso patch
- Link to v2: https://patch.msgid.link/20251219-arm64-dts-qcom-x1e80100-el2-add-apss-wdt-v2-0-fdfc6ba663e6@oss.qualcomm.com

Changes in v2:
- Moved the node in the SoC dtsi and marked it as reserved.
  This allowed dropping the interrupt-parent property.
  As suggested by Stephan.
- Added separate patch to enable the node in EL2 overlay.
- Picked up Rob's R-b patch for bindings patch..
- Link to v1: https://patch.msgid.link/20251214-arm64-dts-qcom-x1e80100-el2-add-apss-wdt-v1-0-94ee80b8cbe7@oss.qualcomm.com

---
Abel Vesa (3):
      dt-bindings: watchdog: Document X1E80100 compatible
      arm64: dts: qcom: hamoa: Add the APSS watchdog
      arm64: dts: qcom: x1-el2: Enable the APSS watchdog

 Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml | 1 +
 arch/arm64/boot/dts/qcom/hamoa.dtsi                      | 8 ++++++++
 arch/arm64/boot/dts/qcom/x1-el2.dtso                     | 4 ++++
 3 files changed, 13 insertions(+)
---
base-commit: cc3aa43b44bdb43dfbac0fcb51c56594a11338a8
change-id: 20251214-arm64-dts-qcom-x1e80100-el2-add-apss-wdt-e04ca6c99f0f

Best regards,
--  
Abel Vesa <abel.vesa@....qualcomm.com>