From 29f0ba2ca92547d483b6f968e688aaef18121255 Mon Sep 17 00:00:00 2001
From: Jarried Lin <jarried.lin@mediatek.corp-partner.google.com>
Date: Tue, 23 Jan 2024 18:26:22 +0800
Subject: soc/mediatek/mt8196: Initialize watchdog

Add watchdog support for MT8196.

TEST=build pass and WDT uart log
BUG=b:317009620

Change-Id: I9d5e71aa27d469855c2bd65abc5309d69a018750
Signed-off-by: Jarried Lin <jarried.lin@mediatek.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83926
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
---
 src/soc/mediatek/mt8196/Makefile.mk       |  1 +
 src/soc/mediatek/mt8196/bootblock.c       |  2 ++
 src/soc/mediatek/mt8196/include/soc/wdt.h | 14 ++++++++++++++
 src/soc/mediatek/mt8196/wdt.c             | 17 +++++++++++++++++
 4 files changed, 34 insertions(+)
 create mode 100644 src/soc/mediatek/mt8196/include/soc/wdt.h
 create mode 100644 src/soc/mediatek/mt8196/wdt.c

diff --git a/src/soc/mediatek/mt8196/Makefile.mk b/src/soc/mediatek/mt8196/Makefile.mk
index 44fa59e927..75f21fca25 100644
--- a/src/soc/mediatek/mt8196/Makefile.mk
+++ b/src/soc/mediatek/mt8196/Makefile.mk
@@ -10,6 +10,7 @@ all-y += ../common/uart.c
 
 bootblock-y += bootblock.c
 bootblock-y += ../common/mmu_operations.c
+bootblock-y += ../common/wdt.c ../common/wdt_req.c wdt.c
 
 romstage-y += ../common/cbmem.c
 romstage-y += emi.c
diff --git a/src/soc/mediatek/mt8196/bootblock.c b/src/soc/mediatek/mt8196/bootblock.c
index f48e78c309..770c6031da 100644
--- a/src/soc/mediatek/mt8196/bootblock.c
+++ b/src/soc/mediatek/mt8196/bootblock.c
@@ -2,8 +2,10 @@
 
 #include <bootblock_common.h>
 #include <soc/mmu_operations.h>
+#include <soc/wdt.h>
 
 void bootblock_soc_init(void)
 {
 	mtk_mmu_init();
+	mtk_wdt_init();
 }
diff --git a/src/soc/mediatek/mt8196/include/soc/wdt.h b/src/soc/mediatek/mt8196/include/soc/wdt.h
new file mode 100644
index 0000000000..a8299fb2e6
--- /dev/null
+++ b/src/soc/mediatek/mt8196/include/soc/wdt.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
+
+#ifndef SOC_MEDIATEK_MT8196_WDT_H
+#define SOC_MEDIATEK_MT8196_WDT_H
+
+#include <soc/wdt_common.h>
+
+#define MTK_WDT_SPM_THERMAL_VAL 1
+
+DEFINE_BIT(MTK_WDT_SPM_THERMAL_EN, 0)
+DEFINE_BIT(MTK_WDT_THERMAL_EN, 18)
+DEFINE_BIT(MTK_WDT_THERMAL_IRQ, 18)
+
+#endif /* SOC_MEDIATEK_MT8196_WDT_H */
diff --git a/src/soc/mediatek/mt8196/wdt.c b/src/soc/mediatek/mt8196/wdt.c
new file mode 100644
index 0000000000..8b8db3bbac
--- /dev/null
+++ b/src/soc/mediatek/mt8196/wdt.c
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
+
+/*
+ * This file is created based on MT8196 Functional Specification
+ * Chapter number: 7.3.4.4
+ */
+
+#include <device/mmio.h>
+#include <soc/addressmap.h>
+#include <soc/wdt.h>
+
+#define MTK_WDT_CLR_STATUS 0x230001FF
+
+void mtk_wdt_clr_status(void)
+{
+	write32(&mtk_wdt->wdt_mode, MTK_WDT_CLR_STATUS);
+}
-- 
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