linux-kernel - [PATCH 6.1 162/451] arm64: dts: mt8195-cherry-tomato: change watchdog reset boot flow

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Date: Sun, 24 Mar 2024 19:07:18 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Hsin-Te Yuan <yuanhsinte@...gle.com>,
	Hsin-Te Yuan <yuanhsinte@...omium.org>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 6.1 162/451] arm64: dts: mt8195-cherry-tomato: change watchdog reset boot flow

From: Hsin-Te Yuan <yuanhsinte@...gle.com>

[ Upstream commit ef569d5db50e7edd709e482157769a5b3c367e22 ]

The external output reset signal was originally disabled and sent from
firmware. However, an unfixed bug in the firmware on tomato prevents
the signal from being sent, causing the device to fail to boot. To fix
this, enable external output reset signal to allow the device to reboot
normally.

Fixes: 5eb2e303ec6b ("arm64: dts: mediatek: Introduce MT8195 Cherry platform's Tomato")
Signed-off-by: Hsin-Te Yuan <yuanhsinte@...omium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Link: https://lore.kernel.org/r/20240124-send-upstream-v3-1-5097c9862a73@chromium.org
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r1.dts | 4 ++++
 arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r2.dts | 4 ++++
 arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r3.dts | 4 ++++
 3 files changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r1.dts b/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r1.dts
index 3348ba69ff6cf..d86d193e5a75e 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r1.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r1.dts
@@ -13,3 +13,7 @@ / {
 &ts_10 {
 	status = "okay";
 };
+
+&watchdog {
+	/delete-property/ mediatek,disable-extrst;
+};
diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r2.dts b/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r2.dts
index 4669e9d917f8c..5356f53308e24 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r2.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r2.dts
@@ -33,3 +33,7 @@ pins-low-power-pcie0-disable {
 &ts_10 {
 	status = "okay";
 };
+
+&watchdog {
+	/delete-property/ mediatek,disable-extrst;
+};
diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r3.dts b/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r3.dts
index 5021edd02f7c1..fca3606cb951e 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r3.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r3.dts
@@ -34,3 +34,7 @@ pins-low-power-pcie0-disable {
 &ts_10 {
 	status = "okay";
 };
+
+&watchdog {
+	/delete-property/ mediatek,disable-extrst;
+};
-- 
2.43.0