This patch adds support for watchdog used by mt6577 and related SoCs such
as mt6575 and mt8317. These watchdogs are known for having shifted WDT_MODE
and SWSYSRST registers and using different SWSYSRST_KEY value.
Signed-off-by: Boris Lysov <arzamas-16@xxxxxxx>
---
drivers/watchdog/mtk_wdt.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/watchdog/mtk_wdt.c b/drivers/watchdog/mtk_wdt.c
index 0878fa33dffe..91d498b5d212 100644
--- a/drivers/watchdog/mtk_wdt.c
+++ b/drivers/watchdog/mtk_wdt.c
@@ -54,6 +54,10 @@
#define MT2712_SWSYSRST_KEY_SHIFT 24 // unlock_key [31:24]
#define MT2712_SWSYSRST_KEY 0x88
+#define MT6577_WDT_MODE_KEY_SHIFT 8 // unlock_key [15:8]
+#define MT6577_SWSYSRST_KEY_SHIFT 8 // unlock_key [15:8]
+#define MT6577_SWSYSRST_KEY 0x15
+
#define MT6589_WDT_MODE_KEY_SHIFT 24 // unlock_key [31:24]
#define MT6589_SWSYSRST_KEY_SHIFT 24 // unlock_key [31:24]
#define MT6589_SWSYSRST_KEY 0x88
@@ -94,6 +98,13 @@ static const struct mtk_wdt_data mt2712_data = {
.wdt_swsys_rst_key = MT2712_SWSYSRST_KEY,
};
+static const struct mtk_wdt_data mt6577_data = {
+ .toprgu_sw_rst_num = -1,
+ .wdt_mode_key_shift = MT6577_WDT_MODE_KEY_SHIFT,
+ .wdt_swsys_rst_key_shift = MT6577_SWSYSRST_KEY_SHIFT,
+ .wdt_swsys_rst_key = MT6577_SWSYSRST_KEY,
+};
+
static const struct mtk_wdt_data mt6589_data = {
.toprgu_sw_rst_num = -1,
.wdt_mode_key_shift = MT6589_WDT_MODE_KEY_SHIFT,
@@ -376,6 +387,7 @@ static int mtk_wdt_resume(struct device *dev)
static const struct of_device_id mtk_wdt_dt_ids[] = {
{ .compatible = "mediatek,mt2712-wdt", .data = &mt2712_data },
+ { .compatible = "mediatek,mt6577-wdt", .data = &mt6577_data },
{ .compatible = "mediatek,mt6589-wdt", .data = &mt6589_data },
{ .compatible = "mediatek,mt8183-wdt", .data = &mt8183_data },
{ .compatible = "mediatek,mt8192-wdt", .data = &mt8192_data },
--
2.20.1
