Implement device wipe using the hardware button on Green

buildroot-external/board/nabucasa/green/patches/uboot/0010-arch-arm64-dts-green-Improve-LED-representation.patch

@@ -0,0 +1,52 @@
+From d3fb1ec2364b20025d71e2263514a71208cfb61e Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Jan=20=C4=8Cerm=C3=A1k?= <[email protected]>
+Date: Tue, 13 Aug 2024 17:51:29 +0200
+Subject: [PATCH] arch: arm64: dts: green: Improve LED representation
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Fix color and use labels/node names according to the LEDs functionality.
+
+Signed-off-by: Jan Čermák <[email protected]>
+Co-authored-by: Stefan Agner <[email protected]>
+---
+ arch/arm/dts/rk3566-ha-green.dts | 11 +++++++----
+ 1 file changed, 7 insertions(+), 4 deletions(-)
+
+diff --git a/arch/arm/dts/rk3566-ha-green.dts b/arch/arm/dts/rk3566-ha-green.dts
+index 68d836911e..c3adc59904 100644
+--- a/arch/arm/dts/rk3566-ha-green.dts
++++ b/arch/arm/dts/rk3566-ha-green.dts
+@@ -48,16 +48,18 @@
+ 	leds {
+ 		compatible = "gpio-leds";
+
+-		led_power: led-0 {
++		led_power: led-power {
++			label = "power";
+ 			gpios = <&gpio0 RK_PB6 GPIO_ACTIVE_HIGH>;
+ 			function = LED_FUNCTION_POWER;
+-			color = <LED_COLOR_ID_RED>;
++			color = <LED_COLOR_ID_WHITE>;
+ 			default-state = "keep";
+ 			linux,default-trigger = "default-on";
+ 			pinctrl-names = "default";
+ 			pinctrl-0 = <&led_power_pin>;
+ 		};
+-		led_act: led-1 {
++		led_act: led-activity {
++			label = "activity";
+ 			gpios = <&gpio0 RK_PB7 GPIO_ACTIVE_HIGH>;
+ 			function = LED_FUNCTION_ACTIVITY;
+ 			color = <LED_COLOR_ID_GREEN>;
+@@ -65,7 +67,8 @@
+ 			pinctrl-names = "default";
+ 			pinctrl-0 = <&led_act_pin>;
+ 		};
+-		led_user: led-2 {
++		led_user: led-user {
++			label = "user";
+ 			gpios = <&gpio0 RK_PC5 GPIO_ACTIVE_HIGH>;
+ 			function = LED_FUNCTION_HEARTBEAT;
+ 			color = <LED_COLOR_ID_YELLOW>;

buildroot-external/board/nabucasa/green/uboot-boot.ush

@@ -27,6 +27,36 @@ test -n "${MACHINE_ID}" || setenv BOOT_CONDITION "systemd.condition-first-boot=t
 # HassOS bootargs
 setenv bootargs_hassos "zram.enabled=1 zram.num_devices=3 rootwait systemd.machine_id=${MACHINE_ID} fsck.repair=yes ${BOOT_CONDITION}"
 
+i2c dev 0
+setenv check_btn_pressed ' \
+    i2c read 0x20 0xf0.1 1 ${loadaddr}; \
+    setexpr PWRON_STS *${loadaddr} \\\& 0x80; \
+    test ${PWRON_STS} -eq 0x0;'
+
+# Check if button is held for device wipe
+setenv counter 0
+while test ${counter} -lt 2; do
+  if run check_btn_pressed; then
+    echo "Reset button pressed for ${counter} seconds"
+    setexpr counter ${counter} + 1
+
+    if test ${counter} -eq 2; then
+      led user on
+      echo "Waiting for button to be released"
+      while run check_btn_pressed; do
+        sleep 0.5
+      done
+      echo "Proceeding with device wipe"
+      setenv bootargs_hassos "${bootargs_hassos} haos.wipe=1"
+    else
+      sleep 1
+    fi
+  else
+    # U-Boot has no break statement :')
+    setenv counter 2
+  fi
+done
+
 # HassOS system A/B
 setenv bootargs_a "root=PARTUUID=8d3d53e3-6d49-4c38-8349-aff6859e82fd ro"
 setenv bootargs_b "root=PARTUUID=a3ec664e-32ce-4665-95ea-7ae90ce9aa20 ro"

buildroot-external/board/nabucasa/green/uboot.config

@@ -0,0 +1,3 @@
+CONFIG_LED=y
+CONFIG_LED_GPIO=y
+CONFIG_CMD_LED=y

buildroot-external/configs/green_defconfig

@@ -143,7 +143,7 @@ BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
 BR2_TARGET_UBOOT_CUSTOM_VERSION=y
 BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2024.01"
 BR2_TARGET_UBOOT_BOARD_DEFCONFIG="green"
-BR2_TARGET_UBOOT_CONFIG_FRAGMENT_FILES="$(BR2_EXTERNAL_HASSOS_PATH)/bootloader/uboot.config"
+BR2_TARGET_UBOOT_CONFIG_FRAGMENT_FILES="$(BR2_EXTERNAL_HASSOS_PATH)/bootloader/uboot.config $(BR2_EXTERNAL_HASSOS_PATH)/board/nabucasa/green/uboot.config"
 BR2_TARGET_UBOOT_NEEDS_PYLIBFDT=y
 BR2_TARGET_UBOOT_NEEDS_PYELFTOOLS=y
 BR2_TARGET_UBOOT_NEEDS_ATF_BL31=y