openwrt/target/linux/mediatek/patches-5.15/920-watchdog-add-mt7986-assert.patch

--- a/drivers/watchdog/mtk_wdt.c
+++ b/drivers/watchdog/mtk_wdt.c
@@ -9,6 +9,7 @@
  * Based on sunxi_wdt.c
  */
 
+#include <dt-bindings/reset/mt7986-resets.h>
 #include <dt-bindings/reset-controller/mt2712-resets.h>
 #include <dt-bindings/reset-controller/mt8183-resets.h>
 #include <dt-bindings/reset-controller/mt8192-resets.h>
@@ -65,6 +66,7 @@ struct mtk_wdt_dev {
 	void __iomem *wdt_base;
 	spinlock_t lock; /* protects WDT_SWSYSRST reg */
 	struct reset_controller_dev rcdev;
+	bool disable_wdt_extrst;
 };
 
 struct mtk_wdt_data {
@@ -87,6 +89,10 @@ static const struct mtk_wdt_data mt8195_
 	.toprgu_sw_rst_num = MT8195_TOPRGU_SW_RST_NUM,
 };
 
+static const struct mtk_wdt_data mt7986_data = {
+	.toprgu_sw_rst_num = MT7986_TOPRGU_SW_RST_NUM,
+};
+
 static int toprgu_reset_update(struct reset_controller_dev *rcdev,
 			       unsigned long id, bool assert)
 {
@@ -256,6 +262,8 @@ static int mtk_wdt_start(struct watchdog
 		reg |= (WDT_MODE_IRQ_EN | WDT_MODE_DUAL_EN);
 	else
 		reg &= ~(WDT_MODE_IRQ_EN | WDT_MODE_DUAL_EN);
+	if (mtk_wdt->disable_wdt_extrst)
+		reg &= ~WDT_MODE_EXRST_EN;
 	reg |= (WDT_MODE_EN | WDT_MODE_KEY);
 	iowrite32(reg, wdt_base + WDT_MODE);
 
@@ -381,6 +389,10 @@ static int mtk_wdt_probe(struct platform
 		if (err)
 			return err;
 	}
+
+	mtk_wdt->disable_wdt_extrst =
+		of_property_read_bool(dev->of_node, "mediatek,disable-extrst");
+
 	return 0;
 }
 
@@ -414,6 +426,7 @@ static const struct of_device_id mtk_wdt
 	{ .compatible = "mediatek,mt8183-wdt", .data = &mt8183_data },
 	{ .compatible = "mediatek,mt8192-wdt", .data = &mt8192_data },
 	{ .compatible = "mediatek,mt8195-wdt", .data = &mt8195_data },
+	{ .compatible = "mediatek,mt7986-wdt", .data = &mt7986_data },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, mtk_wdt_dt_ids);