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The HW implementation is compatible with the KPSS WDT. Acked-by: Rob Herring (Arm) Signed-off-by: Abel Vesa Reviewed-by: Guenter Roeck --- Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml | 1 + 1 file changed, 1 insertion(+) diff --git a/Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml b/Doc= umentation/devicetree/bindings/watchdog/qcom-wdt.yaml index 54f5311ed016..f2c4bc900e5f 100644 --- a/Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml +++ b/Documentation/devicetree/bindings/watchdog/qcom-wdt.yaml @@ -43,6 +43,7 @@ properties: - qcom,apss-wdt-sm6350 - qcom,apss-wdt-sm8150 - qcom,apss-wdt-sm8250 + - qcom,apss-wdt-x1e80100 - const: qcom,kpss-wdt - const: qcom,kpss-wdt deprecated: true --=20 2.48.1 From nobody Tue Feb 10 03:43:54 2026 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 310D42FFFA4 for ; Fri, 19 Dec 2025 10:00:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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So describe the APSS WDT node and mark it as reserved, as it will only be enabled in EL2 overlay. Signed-off-by: Abel Vesa --- arch/arm64/boot/dts/qcom/hamoa.dtsi | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/hamoa.dtsi b/arch/arm64/boot/dts/qcom= /hamoa.dtsi index a17900eacb20..b65dfad71c2f 100644 --- a/arch/arm64/boot/dts/qcom/hamoa.dtsi +++ b/arch/arm64/boot/dts/qcom/hamoa.dtsi @@ -8302,6 +8302,14 @@ gic_its: msi-controller@17040000 { }; }; =20 + apss_watchdog: watchdog@17410000 { + compatible =3D "qcom,apss-wdt-x1e80100", "qcom,kpss-wdt"; + reg =3D <0x0 0x17410000 0x0 0x1000>; + clocks =3D <&sleep_clk>; + interrupts =3D ; + status =3D "reserved"; /* Accessible in EL2 only */ + }; + cpucp_mbox: mailbox@17430000 { compatible =3D "qcom,x1e80100-cpucp-mbox"; reg =3D <0 0x17430000 0 0x10000>, <0 0x18830000 0 0x10000>; --=20 2.48.1 From nobody Tue Feb 10 03:43:54 2026 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0823C13B293 for ; 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So enable it in the overlay. Signed-off-by: Abel Vesa Reviewed-by: Dmitry Baryshkov --- arch/arm64/boot/dts/qcom/x1-el2.dtso | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/x1-el2.dtso b/arch/arm64/boot/dts/qco= m/x1-el2.dtso index 2d1c9151cf1b..175679be01eb 100644 --- a/arch/arm64/boot/dts/qcom/x1-el2.dtso +++ b/arch/arm64/boot/dts/qcom/x1-el2.dtso @@ -7,6 +7,10 @@ /dts-v1/; /plugin/; =20 +&apss_watchdog { + status =3D "okay"; +}; + /* We can't and don't need to use zap shader in EL2 as linux can zap the g= pu on it's own. */ &gpu_zap_shader { status =3D "disabled"; --=20 2.48.1