[PATCH v2 32/40] arm64: dts: tegra210-p2180: Allow ldo2 to go down to 1.8 V
From: Aapo Vienamo <hidden>
Date: 2018-08-10 18:10:32
Also in:
linux-mmc, linux-tegra, lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
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 <redacted> Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com> --- arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-)
diff --git a/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi b/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
index 212e663..8496101 100644
--- a/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi@@ -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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2.7.4