linux-kernel - [PATCH v2 0/3] arm64: dts: qcom: x1e80100: Enable APSS watchdog in EL2

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Message-Id: <20251219-arm64-dts-qcom-x1e80100-el2-add-apss-wdt-v2-0-fdfc6ba663e6@oss.qualcomm.com>
Date: Fri, 19 Dec 2025 12:00:27 +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>
Subject: [PATCH v2 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 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: d9771d0dbe18dd643760431870a6abf9b0866bb0
change-id: 20251214-arm64-dts-qcom-x1e80100-el2-add-apss-wdt-e04ca6c99f0f

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