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uboot-mediatek: mt7986: add generic reset button support

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Allow resetting environment to default values when defined button
exists in device tree.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
This commit is contained in:
Daniel Golle
2022-07-17 21:42:05 +01:00
parent 85581cc89a
commit 20eee0d6cb
1 changed files with 40 additions and 0 deletions
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40
package/boot/uboot-mediatek/patches/303-mt7986-generic-reset-button-ignore-env.patch Normal file
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@@ -0,0 +1,40 @@
--- a/board/mediatek/mt7986/mt7986_rfb.c
+++ b/board/mediatek/mt7986/mt7986_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>
@@ -25,7 +32,19 @@ int board_init(void)
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
+ 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;
}