Commit 41cc3771 authored Aug 10, 2018 by Aapo Vienamo Committed by Thierry Reding Aug 27, 2018

arm64: dts: tegra210-p2180: Allow ldo2 to go down to 1.8 V



Set regulator-min-microvolt property of ldo2 to 1.8 V in
tegra210-p2180.dtsi. ldo2 is used by the sdmmc1 SDHCI controller and its
voltage needs to be adjusted down to 1.8 V to support faster signaling
modes. It appears that the comment about the SDHCI driver requesting
invalid voltages no longer applies.

Signed-off-by: Aapo Vienamo <avienamo@nvidia.com>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

parent 24005fd1

arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi

+1 −10

Original line number	Diff line number	Diff line
		@@ -178,16 +178,7 @@

		vddio_sdmmc: ldo2 {
		regulator-name = "VDDIO_SDMMC";
		/*
		* Technically this supply should have
		* a supported range from 1.8 - 3.3 V.
		* However, that would cause the SDHCI
		* driver to request 2.7 V upon access
		* and that in turn will cause traffic
		* to be broken. Leave it at 3.3 V for
		* now.
		*/
		regulator-min-microvolt = <3300000>;
		regulator-min-microvolt = <1800000>;
		regulator-max-microvolt = <3300000>;
		regulator-always-on;
		regulator-boot-on;

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