riscv: dts: sifive unmatched: Add gpio poweroff

Some of the GPIO pins on the Unmatched are wire up to control the power
of the board, indicate that in the device tree.

Signed-off-by: Ron Economos <w6rz@comcast.net>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

diff --git a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
index 6bfa1f2..c4ed9ef 100644 (file)
--- a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
+++ b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
@@ -39,6 +39,11 @@
                clock-frequency = <RTCCLK_FREQ>;
                clock-output-names = "rtcclk";
        };
+
+       gpio-poweroff {
+               compatible = "gpio-poweroff";
+               gpios = <&gpio 2 GPIO_ACTIVE_LOW>;
+       };
 };
 
 &uart0 {