soc/mediatek/mt8186: Enable thermal hardware reset

Under the current watchdog setting, the system will not reboot when the
temperature is too high. To enable thermal hardware reset, we need to
enable thermal control request and set it to reboot mode.

Note that because thermal throttle (by lowering cpu frequency) is
currently enabled, the thermal hardware reset shouldn't be triggered
under normal circumstances.

This feature is only for new hardware structure for thermal. Therefore,
we only need to apply it on MT8192/MT8195/MT8186.

This setting is based on thermal and watchdog section of MT8186
Function Specification.

BUG=none
TEST=emerge-corsola coreboot
TEST=thermal hardware reset is working.

Signed-off-by: Runyang Chen <runyang.chen@mediatek.corp-partner.google.com>
Change-Id: Id2ed55e6d4f4eec450bf7c849f726a389eeb6694
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64659
Reviewed-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/soc/mediatek/common/include/soc/wdt.h b/src/soc/mediatek/common/include/soc/wdt.h
index ebf7f490f5c2..5494ff86ef0a 100644
--- a/src/soc/mediatek/common/include/soc/wdt.h
+++ b/src/soc/mediatek/common/include/soc/wdt.h
@@ -16,7 +16,8 @@ struct mtk_wdt_regs {
 	u32 wdt_swsysrst;
 	u32 reserved0[5];
 	u32 wdt_req_mode;
-	u32 reserved1[3];
+	u32 wdt_req_irq_en;
+	u32 reserved1[2];
 	u32 wdt_debug_ctrl;
 };