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--- a/board/mediatek/mt7988/mt7988_rfb.c
+++ b/board/mediatek/mt7988/mt7988_rfb.c
@@ -4,7 +4,43 @@
* Author: Sam Shih <sam.shih@mediatek.com>
*/
+#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
+
int board_init(void)
{
return 0;
}
+
+int board_late_init(void)
+{
+ gd->env_valid = 1; //to load environment variable from persistent store
+ struct udevice *dev;
+
+ gd->env_valid = ENV_VALID;
+ 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;
+}
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