From 4f12742fdc03c8ddfb5c4e26f0fd9c3e112d0a27 Mon Sep 17 00:00:00 2001
From: Takumi Sueda <puhitaku@gmail.com>
Date: Thu, 23 Feb 2023 03:34:45 +0900
Subject: [PATCH 1/3] arm: brain: enable syscon poweroff

---
 arch/arm/configs/brain_defconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/configs/brain_defconfig b/arch/arm/configs/brain_defconfig
index 6be404840d01..32b4a4bc09b9 100644
--- a/arch/arm/configs/brain_defconfig
+++ b/arch/arm/configs/brain_defconfig
@@ -123,6 +123,9 @@ CONFIG_SPI=y
 CONFIG_SPI_GPIO=m
 CONFIG_SPI_MXS=y
 CONFIG_GPIO_SYSFS=y
+CONFIG_POWER_RESET=y
+CONFIG_POWER_RESET_SYSCON=y
+CONFIG_POWER_RESET_SYSCON_POWEROFF=y
 # CONFIG_HWMON is not set
 CONFIG_WATCHDOG=y
 CONFIG_STMP3XXX_RTC_WATCHDOG=y

From 6cf75aaa0bccf953ead68b7843f2085630e6f2aa Mon Sep 17 00:00:00 2001
From: Takumi Sueda <puhitaku@gmail.com>
Date: Thu, 23 Feb 2023 03:35:43 +0900
Subject: [PATCH 2/3] ARM: dts: imx28: enable optional syscon-poweroff

Based on https://patchwork.kernel.org/project/linux-arm-kernel/patch/20190923091700.22517-1-sebastien.szymanski@armadeus.com/
---
 arch/arm/boot/dts/imx28.dtsi | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/imx28.dtsi b/arch/arm/boot/dts/imx28.dtsi
index e14d8ef0158b..83d102841d74 100644
--- a/arch/arm/boot/dts/imx28.dtsi
+++ b/arch/arm/boot/dts/imx28.dtsi
@@ -1114,8 +1114,16 @@
 			};
 
 			power: power@80044000 {
+				compatible = "syscon", "simple-mfd";
 				reg = <0x80044000 0x2000>;
-				status = "disabled";
+
+				poweroff: poweroff {
+					compatible = "syscon-poweroff";
+					regmap = <&power>;
+					offset = <0x104>;
+					value = <0x3e770001>;
+					status = "disabled";
+				};
 			};
 
 			saif1: saif@80046000 {

From 962a8649686c6b0f6c9a9e6bbaccbafcc7d00901 Mon Sep 17 00:00:00 2001
From: Takumi Sueda <puhitaku@gmail.com>
Date: Thu, 23 Feb 2023 03:37:44 +0900
Subject: [PATCH 3/3] arm: brain: enable syscon-poweroff

---
 arch/arm/boot/dts/imx28-brain.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/imx28-brain.dtsi b/arch/arm/boot/dts/imx28-brain.dtsi
index 1a74a758c8b2..8f9f2116c5c6 100644
--- a/arch/arm/boot/dts/imx28-brain.dtsi
+++ b/arch/arm/boot/dts/imx28-brain.dtsi
@@ -263,6 +263,12 @@
 				status = "okay";
 			};
 
+			power: power@80044000 {
+				poweroff: poweroff {
+					status = "okay";
+				};
+			};
+
 			saif1: saif@80046000 {
 				pinctrl-names = "default";
 				pinctrl-0 = <&saif1_pins_a>;