| Message ID | 1532090746-15863-6-git-send-email-avienamo@nvidia.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Tegra SDHCI enable 1.8 V signaling on Tegar210 and Tegra186 | expand |
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com> On 20.07.2018 15:45, Aapo Vienamo wrote: > 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> > --- > 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; > -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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;
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> --- arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-)