linux-kernel - [PATCH v3 01/18] arm64: dts: mediatek: mt8183-kukui: Couple VGPU and VSRAM

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Message-Id: <20230228104741.717819-2-angelogioacchino.delregno@collabora.com>
Date:   Tue, 28 Feb 2023 11:47:24 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     matthias.bgg@...il.com
Cc:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        angelogioacchino.delregno@...labora.com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, wenst@...omium.org
Subject: [PATCH v3 01/18] arm64: dts: mediatek: mt8183-kukui: Couple VGPU and VSRAM_GPU regulators

Add coupling for these regulators, as they have a strict voltage output
relation to satisfy in order to ensure GPU stable operation.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Reviewed-by: Chen-Yu Tsai <wenst@...omium.org>
---
 arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
index fbe14b13051a..de9778c85b94 100644
--- a/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8183-kukui.dtsi
@@ -294,7 +294,6 @@ dsi_out: endpoint {
 
 &gpu {
 	mali-supply = <&mt6358_vgpu_reg>;
-	sram-supply = <&mt6358_vsram_gpu_reg>;
 };
 
 &i2c0 {
@@ -401,6 +400,11 @@ &mt6358codec {
 	Avdd-supply = <&mt6358_vaud28_reg>;
 };
 
+&mt6358_vgpu_reg {
+	regulator-coupled-with = <&mt6358_vsram_gpu_reg>;
+	regulator-coupled-max-spread = <100000>;
+};
+
 &mt6358_vsim1_reg {
 	regulator-min-microvolt = <2700000>;
 	regulator-max-microvolt = <2700000>;
@@ -411,6 +415,11 @@ &mt6358_vsim2_reg {
 	regulator-max-microvolt = <2700000>;
 };
 
+&mt6358_vsram_gpu_reg {
+	regulator-coupled-with = <&mt6358_vgpu_reg>;
+	regulator-coupled-max-spread = <100000>;
+};
+
 &pio {
 	aud_pins_default: audiopins {
 		pins_bus {
-- 
2.39.2