linux-kernel - [PATCH] riscv: dts: Add GPIO reboot method to HiFive Unleashed DTS file

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Date:   Wed, 19 Feb 2020 09:19:07 +0530
From:   Yash Shah <yash.shah@...ive.com>
To:     robh+dt@...nel.org, mark.rutland@....com, palmer@...belt.com,
        paul.walmsley@...ive.com
Cc:     aou@...s.berkeley.edu, atish.patra@....com,
        devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Yash Shah <yash.shah@...ive.com>
Subject: [PATCH] riscv: dts: Add GPIO reboot method to HiFive Unleashed DTS file

Add the ability to reboot the HiFive Unleashed board via GPIO.

Signed-off-by: Yash Shah <yash.shah@...ive.com>
---
 arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
index 609198c..4a2729f 100644
--- a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
+++ b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
@@ -2,6 +2,7 @@
 /* Copyright (c) 2018-2019 SiFive, Inc */
 
 #include "fu540-c000.dtsi"
+#include <dt-bindings/gpio/gpio.h>
 
 /* Clock frequency (in Hz) of the PCB crystal for rtcclk */
 #define RTCCLK_FREQ		1000000
@@ -41,6 +42,10 @@
 		clock-frequency = <RTCCLK_FREQ>;
 		clock-output-names = "rtcclk";
 	};
+	gpio-restart {
+		compatible = "gpio-restart";
+		gpios = <&gpio 10 GPIO_ACTIVE_LOW>;
+	};
 };
 
 &uart0 {
-- 
2.7.4