linux-kernel - [PATCH] powerpc: dts: turris1x.dts: Add CPLD reboot node

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Date:   Wed, 13 Jul 2022 15:44:29 +0200
From:   Pali Rohár <pali@...nel.org>
To:     Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     linuxppc-dev@...ts.ozlabs.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] powerpc: dts: turris1x.dts: Add CPLD reboot node

CPLD firmware can reset board by writing value 0x01 at CPLD memory offset
0x0d. Define syscon-reboot node for this reset support.

Fixes: 54c15ec3b738 ("powerpc: dts: Add DTS file for CZ.NIC Turris 1.x routers")
Signed-off-by: Pali Rohár <pali@...nel.org>
---
 arch/powerpc/boot/dts/turris1x.dts | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/boot/dts/turris1x.dts b/arch/powerpc/boot/dts/turris1x.dts
index c76b628cf026..12e08271e61f 100644
--- a/arch/powerpc/boot/dts/turris1x.dts
+++ b/arch/powerpc/boot/dts/turris1x.dts
@@ -332,7 +332,7 @@
 			 * Turris CPLD firmware is open source and available at:
 			 * https://gitlab.nic.cz/turris/hw/turris_cpld/-/blob/master/CZ_NIC_Router_CPLD.v
 			 */
-			compatible = "cznic,turris1x-cpld", "fsl,p1021rdb-pc-cpld", "simple-bus";
+			compatible = "cznic,turris1x-cpld", "fsl,p1021rdb-pc-cpld", "simple-bus", "syscon";
 			reg = <0x3 0x0 0x30>;
 			#address-cells = <1>;
 			#size-cells = <1>;
@@ -352,6 +352,14 @@
 				gpios = <&gpio 11 GPIO_ACTIVE_LOW>;
 			};
 
+			reboot@d {
+				compatible = "syscon-reboot";
+				reg = <0x0d 0x01>;
+				offset = <0x0d>;
+				mask = <0x01>;
+				value = <0x01>;
+			};
+
 			led-controller@13 {
 				/*
 				 * LEDs are controlled by CPLD firmware.
-- 
2.20.1