linux-kernel - [PATCH 6.6 244/638] arm64: dts: mt8195-cherry-tomato: change watchdog reset boot flow

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Date: Sun, 24 Mar 2024 18:54:41 -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 6.6 244/638] 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 2d5e8f371b6de..a82d716f10d44 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r1.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r1.dts
@@ -23,3 +23,7 @@ &sound {
 &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 2586c32ce6e6f..2fe20e0dad836 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r2.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r2.dts
@@ -43,3 +43,7 @@ &sound {
 &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 f54f9477b99da..dd294ca98194c 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r3.dts
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry-tomato-r3.dts
@@ -44,3 +44,7 @@ &sound {
 &ts_10 {
 	status = "okay";
 };
+
+&watchdog {
+	/delete-property/ mediatek,disable-extrst;
+};
-- 
2.43.0