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authorAapo Vienamo <avienamo@nvidia.com>2018-08-10 21:08:34 +0300
committerThierry Reding <treding@nvidia.com>2018-08-27 13:27:25 +0300
commit41cc3771c93e7b08520e80c1673ed3183e7cfa2a (patch)
treefd75aca71469db8ec5daa8956e6d3b0a1703333f /arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
parent24005fd1b3b4e3fdd4cc45e7ead21d07e8ee1670 (diff)
downloadlinux-41cc3771c93e7b08520e80c1673ed3183e7cfa2a.tar.xz
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>
Diffstat (limited to 'arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi')
-rw-r--r--arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi11
1 files changed, 1 insertions, 10 deletions
diff --git a/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi b/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi
index 212e6634c9ba..84961017abd8 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;