openwrt/package/boot/uboot-mediatek/patches/300-mt7622-generic-reset-button-ignore-env.patch

--- 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
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -20,7 +27,19 @@ int board_init(void)
 
 int board_late_init(void)
 {
-	gd->env_valid = 1; //to load environment variable from persistent store
+	struct udevice *dev;
+	int ret;
+
+	ret = !!button_get_by_label(CONFIG_RESET_BUTTON_LABEL, &dev);
+
+	if (!ret) {
+#ifdef CONFIG_RESET_BUTTON_SETTLE_DELAY
+		udelay(1000 * CONFIG_RESET_BUTTON_SETTLE_DELAY);
+#endif
+		ret = !button_get_state(dev);
+	}
+
+	gd->env_valid = ret; //to load environment variable from persistent store
 	env_relocate();
 	return 0;
 }