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Subject[PATCH v3 11/18] arm64: dts: mediatek: mt8192-asurada: Couple VGPU and VSRAM_OTHER regulators
Date
Add coupling for these regulators, as VSRAM_OTHER is used to power the
GPU SRAM, and they have a strict voltage output relation to satisfy in
order to ensure GPU stable operation.
While at it, also add voltage constraint overrides for the GPU SRAM
regulator "mt6359_vsram_others", but don't touch mt6315's vbuck1 as
its constraints are fine.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
index df477eb89f21..c8b6e1a9605b 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
@@ -447,6 +447,13 @@ &mt6359_vrf12_ldo_reg {
regulator-always-on;
};

+&mt6359_vsram_others_ldo_reg {
+ regulator-min-microvolt = <750000>;
+ regulator-max-microvolt = <850000>;
+ regulator-coupled-with = <&mt6315_7_vbuck1>;
+ regulator-coupled-max-spread = <10000>;
+};
+
&mt6359_vufs_ldo_reg {
regulator-always-on;
};
@@ -1411,6 +1418,8 @@ mt6315_7_vbuck1: vbuck1 {
regulator-max-microvolt = <1193750>;
regulator-enable-ramp-delay = <256>;
regulator-allowed-modes = <0 1 2>;
+ regulator-coupled-with = <&mt6359_vsram_others_ldo_reg>;
+ regulator-coupled-max-spread = <10000>;
};
};
};
--
2.39.2
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