[PATCH] ARM: tegra: beaver: allow SD card voltage to be changed
From: dev@lynxeye.de (Lucas Stach)
Date: 2016-05-13 07:25:31
Also in:
linux-tegra
Am Montag, den 29.02.2016, 22:01 +0100 schrieb Lucas Stach:
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@lynxeye.de> --- 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.
The patches this one depends on have been applied for some time now. Please pick up this patch. Thanks, Lucas
quoted hunk ↗ jump to hunk
--- ?arch/arm/boot/dts/tegra30-beaver.dts | 3 ++- ?1 file changed, 2 insertions(+), 1 deletion(-)diff --git a/arch/arm/boot/dts/tegra30-beaver.dtsb/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 at 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>;