linux-kernel - [PATCH 6/6] arm64: tegra: Enable native timers on Tegra234

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Message-ID: <1649924738-17990-7-git-send-email-kkartik@nvidia.com>
Date:   Thu, 14 Apr 2022 13:55:38 +0530
From:   Kartik <kkartik@...dia.com>
To:     <daniel.lezcano@...aro.org>, <tglx@...utronix.de>,
        <robh+dt@...nel.org>, <krzk+dt@...nel.org>,
        <thierry.reding@...il.com>, <jonathanh@...dia.com>,
        <spujar@...dia.com>, <akhilrajeev@...dia.com>,
        <rgumasta@...dia.com>, <pshete@...dia.com>, <vidyas@...dia.com>,
        <mperttunen@...dia.com>, <mkumard@...dia.com>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-tegra@...r.kernel.org>, <kkartik@...dia.com>
Subject: [PATCH 6/6] arm64: tegra: Enable native timers on Tegra234

The native timers IP block found on NVIDIA Tegra SoCs implements a
watchdog timer that can be used to recover from system hangs. Add and
enable the device tree node on Tegra234.

Signed-off-by: Kartik <kkartik@...dia.com>
---
 arch/arm64/boot/dts/nvidia/tegra234.dtsi | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/arm64/boot/dts/nvidia/tegra234.dtsi b/arch/arm64/boot/dts/nvidia/tegra234.dtsi
index 8767dbe2d066..47e0500a3838 100644
--- a/arch/arm64/boot/dts/nvidia/tegra234.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra234.dtsi
@@ -446,6 +446,28 @@
 			status = "okay";
 		};
 
+		timer@...0000 {
+			compatible = "nvidia,tegra234-timer";
+			reg = <0x02080000 0x00121000>;
+			interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>,
+				     <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>;
+			status = "okay";
+		};
+
 		gpio: gpio@...0000 {
 			compatible = "nvidia,tegra234-gpio";
 			reg-names = "security", "gpio";
-- 
2.17.1