linux-kernel - [PATCH 1/2] arm64: dts: st: add arm-wdt node for watchdog support on stm32mp251

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Message-ID: <20230922081055.6242-2-alexandre.torgue@foss.st.com>
Date:   Fri, 22 Sep 2023 10:10:54 +0200
From:   Alexandre Torgue <alexandre.torgue@...s.st.com>
To:     <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] arm64: dts: st: add arm-wdt node for watchdog support on stm32mp251

Add the node to use the ARM SMC watchdog support. It will
use a dedicated smc-id to configure and kick the watchdog.

Signed-off-by: Lionel Debieve <lionel.debieve@...s.st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@...s.st.com>

diff --git a/arch/arm64/boot/dts/st/stm32mp251.dtsi b/arch/arm64/boot/dts/st/stm32mp251.dtsi
index d7cb05d534ac..124403f5f1f4 100644
--- a/arch/arm64/boot/dts/st/stm32mp251.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp251.dtsi
@@ -28,6 +28,12 @@
 		interrupt-parent = <&intc>;
 	};
 
+	arm_wdt: watchdog {
+		compatible = "arm,smc-wdt";
+		arm,smc-id = <0xb200005a>;
+		status = "disabled";
+	};
+
 	clocks {
 		ck_flexgen_08: ck-flexgen-08 {
 			#clock-cells = <0>;
-- 
2.17.1