On 29/02/16 21:01, Lucas Stach wrote:
> 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";
Stephen, looking at the schematics, I don't see that this is connected
to the avdd_vdac (which appears to be unconnected) and so I am wondering
if this name should be just "vddio_sdmmc"?
> - 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>;
>
Otherwise ...
Acked-by: Jon Hunter <jonathanh@xxxxxxxxxx>
Cheers
Jon
--
nvpublic
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