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--- a/board/mediatek/mt7622/mt7622_rfb.c
+++ b/board/mediatek/mt7622/mt7622_rfb.c
@@ -6,9 +6,16 @@
#include <common.h>
#include <config.h>
+#include <dm.h>
+#include <button.h>
#include <env.h>
#include <init.h>
#include <asm/global_data.h>
+#include <linux/delay.h>
+
+#ifndef CONFIG_RESET_BUTTON_LABEL
+#define CONFIG_RESET_BUTTON_LABEL "reset"
+#endif
#include <mtd.h>
#include <linux/mtd/mtd.h>
@@ -24,7 +31,22 @@ int board_init(void)
int board_late_init(void)
{
- gd->env_valid = 1; //to load environment variable from persistent store
+ struct udevice *dev;
+
+ if (!button_get_by_label(CONFIG_RESET_BUTTON_LABEL, &dev)) {
+ puts("reset button found\n");
+#ifdef CONFIG_RESET_BUTTON_SETTLE_DELAY
+ if (CONFIG_RESET_BUTTON_SETTLE_DELAY > 0) {
+ button_get_state(dev);
+ mdelay(CONFIG_RESET_BUTTON_SETTLE_DELAY);
+ }
+#endif
+ if (button_get_state(dev) == BUTTON_ON) {
+ puts("button pushed, resetting environment\n");
+ gd->env_valid = ENV_INVALID;
+ }
+ }
+
env_relocate();
return 0;
}
--- a/arch/arm/mach-mediatek/Kconfig
+++ b/arch/arm/mach-mediatek/Kconfig
@@ -151,4 +151,11 @@ config MTK_BROM_HEADER_INFO
source "board/mediatek/mt7629/Kconfig"
+config RESET_BUTTON_LABEL
+ string "Button to trigger factory reset"
+ default "reset"
+
+config RESET_BUTTON_SETTLE_DELAY
+ int "Delay to wait for button to settle"
+ default 0
endif
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