linux-kernel - [PATCH 2/2] arm64: dts: mediatek: mt8195-cherry: Assign sram supply to MFG1 pd

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Message-ID: <20231030132523.86123-3-angelogioacchino.delregno@collabora.com>
Date:   Mon, 30 Oct 2023 14:25:23 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     matthias.bgg@...il.com
Cc:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, wenst@...omium.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, kernel@...labora.com
Subject: [PATCH 2/2] arm64: dts: mediatek: mt8195-cherry: Assign sram supply to MFG1 pd

Add a phandle to the MT8195_POWER_DOMAIN_MFG1 power domain and
assign the GPU SRAM (vsram_others) supply to that in mt8195-cherry:
this allows to keep the sram powered up while the GPU is used.

This means that it's now possible to remove the regulator-always-on
property from the mt6359_vsram_others_ldo_reg vreg, so that it will
be switched on and off during suspend.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi | 5 ++++-
 arch/arm64/boot/dts/mediatek/mt8195.dtsi        | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
index 26213100419a..9d0f3d25cb07 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
@@ -482,6 +482,10 @@ &mfg0 {
 	domain-supply = <&mt6315_7_vbuck1>;
 };
 
+&mfg1 {
+	domain-supply = <&mt6359_vsram_others_ldo_reg>;
+};
+
 &mmc0 {
 	status = "okay";
 
@@ -552,7 +556,6 @@ &mt6359_vrf12_ldo_reg {
 
 /* for GPU SRAM */
 &mt6359_vsram_others_ldo_reg {
-	regulator-always-on;
 	regulator-min-microvolt = <750000>;
 	regulator-max-microvolt = <750000>;
 };
diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
index 79934cf051b9..8136d7631166 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
@@ -538,7 +538,7 @@ mfg0: power-domain@...195_POWER_DOMAIN_MFG0 {
 					#size-cells = <0>;
 					#power-domain-cells = <1>;
 
-					power-domain@...195_POWER_DOMAIN_MFG1 {
+					mfg1: power-domain@...195_POWER_DOMAIN_MFG1 {
 						reg = <MT8195_POWER_DOMAIN_MFG1>;
 						clocks = <&apmixedsys CLK_APMIXED_MFGPLL>,
 							 <&topckgen CLK_TOP_MFG_CORE_TMP>;
-- 
2.42.0