linux-kernel - [PATCH v3 6/7] arm64: tegra: Add native timer support on Tegra194

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Date:   Fri,  3 Apr 2020 22:22:08 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Thierry Reding <thierry.reding@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Dmitry Osipenko <digetx@...il.com>,
        Jon Hunter <jonathanh@...dia.com>, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 6/7] arm64: tegra: Add native timer support on Tegra194

From: Thierry Reding <treding@...dia.com>

The native timers IP block found on NVIDIA Tegra SoCs implements a
watchdog timer that can be used to recover from system hangs. Add the
device tree node on Tegra194.

Signed-off-by: Thierry Reding <treding@...dia.com>
---
 arch/arm64/boot/dts/nvidia/tegra194.dtsi | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
index 019f66f03a97..a0a5b44ff9bb 100644
--- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
@@ -213,6 +213,23 @@ emc: external-memory-controller@...0000 {
 			};
 		};
 
+		timer@...0000 {
+			compatible = "nvidia,tegra194-timer",
+				     "nvidia,tegra186-timer";
+			reg = <0x03010000 0x000e0000>;
+			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>;
+			status = "disabled";
+		};
+
 		uarta: serial@...0000 {
 			compatible = "nvidia,tegra194-uart", "nvidia,tegra20-uart";
 			reg = <0x03100000 0x40>;
-- 
2.24.1