This allows to switch the card signal voltage level to 1.8V,
which is needed for any ultra high speed modes to work.
Signed-off-by: Lucas Stach <dev@xxxxxxxxxx>
---
This needs the SDMMC memcomp pad calibration patches I just
sent out to be applied, otherwise the card voltage change will
fail with a message in the kernel log and a fall back to
high speed operation.
---
arch/arm/boot/dts/tegra30-beaver.dts | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/tegra30-beaver.dts b/arch/arm/boot/dts/tegra30-beaver.dts
index 1daed40..6b237f2 100644
--- a/arch/arm/boot/dts/tegra30-beaver.dts
+++ b/arch/arm/boot/dts/tegra30-beaver.dts
@@ -1848,7 +1848,7 @@
ldo5_reg: ldo5 {
regulator-name = "vddio_sdmmc,avdd_vdac";
- regulator-min-microvolt = <3300000>;
+ regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
};
@@ -1919,6 +1919,7 @@
sdhci@78000000 {
status = "okay";
+ vqmmc-supply = <&ldo5_reg>;
cd-gpios = <&gpio TEGRA_GPIO(I, 5) GPIO_ACTIVE_LOW>;
wp-gpios = <&gpio TEGRA_GPIO(T, 3) GPIO_ACTIVE_HIGH>;
power-gpios = <&gpio TEGRA_GPIO(D, 7) GPIO_ACTIVE_HIGH>;
--
2.5.0
--
To unsubscribe from this list: send the line "unsubscribe linux-tegra" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
