linux-kernel - [PATCH] arm64: dts: mediatek: mt8186-corsola: Fix GPU supply coupling max-spread

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Message-ID: <20241021140537.3049232-1-wenst@chromium.org>
Date: Mon, 21 Oct 2024 22:05:36 +0800
From: Chen-Yu Tsai <wenst@...omium.org>
To: Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: Chen-Yu Tsai <wenst@...omium.org>,
	devicetree@...r.kernel.org,
	linux-mediatek@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: [PATCH] arm64: dts: mediatek: mt8186-corsola: Fix GPU supply coupling max-spread

The GPU SRAM supply is supposed to be always at least 0.1V higher than
the GPU supply. However when the DT was upstreamed, the spread was
incorrectly set to 0.01V.

Fixes: 8855d01fb81f ("arm64: dts: mediatek: Add MT8186 Krabby platform based Tentacruel / Tentacool")
Cc: <stable@...r.kernel.org>
Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
---
Noticed this while trying to align the downstream Mali driver to the
upstream device tree and binding.

 arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi b/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi
index cf288fe7a238..db2aca079349 100644
--- a/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi
@@ -1352,7 +1352,7 @@ mt6366_vgpu_reg: vgpu {
 				regulator-allowed-modes = <MT6397_BUCK_MODE_AUTO
 							   MT6397_BUCK_MODE_FORCE_PWM>;
 				regulator-coupled-with = <&mt6366_vsram_gpu_reg>;
-				regulator-coupled-max-spread = <10000>;
+				regulator-coupled-max-spread = <100000>;
 			};
 
 			mt6366_vproc11_reg: vproc11 {
@@ -1561,7 +1561,7 @@ mt6366_vsram_gpu_reg: vsram-gpu {
 				regulator-ramp-delay = <6250>;
 				regulator-enable-ramp-delay = <240>;
 				regulator-coupled-with = <&mt6366_vgpu_reg>;
-				regulator-coupled-max-spread = <10000>;
+				regulator-coupled-max-spread = <100000>;
 			};
 
 			mt6366_vsram_others_reg: vsram-others {
-- 
2.47.0.rc1.288.g06298d1525-goog