<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">--- a/board/mediatek/mt7981/mt7981_rfb.c
+++ b/board/mediatek/mt7981/mt7981_rfb.c
@@ -6,9 +6,16 @@
 
 #include &lt;common.h&gt;
 #include &lt;config.h&gt;
+#include &lt;dm.h&gt;
+#include &lt;button.h&gt;
 #include &lt;env.h&gt;
 #include &lt;init.h&gt;
 #include &lt;asm/global_data.h&gt;
+#include &lt;linux/delay.h&gt;
+
+#ifndef CONFIG_RESET_BUTTON_LABEL
+#define CONFIG_RESET_BUTTON_LABEL "reset"
+#endif
 
 #include &lt;mtd.h&gt;
 #include &lt;linux/mtd/mtd.h&gt;
@@ -24,7 +31,22 @@ int board_init(void)
 
 int board_late_init(void)
 {
-	gd-&gt;env_valid = 1; //to load environment variable from persistent store
+	struct udevice *dev;
+
+	gd-&gt;env_valid = ENV_VALID;
+	if (!button_get_by_label(CONFIG_RESET_BUTTON_LABEL, &amp;dev)) {
+		puts("reset button found\n");
+#ifdef CONFIG_RESET_BUTTON_SETTLE_DELAY
+		if (CONFIG_RESET_BUTTON_SETTLE_DELAY &gt; 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-&gt;env_valid = ENV_INVALID;
+		}
+	}
 	env_relocate();
 	return 0;
 }
</pre></body></html>