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    Subject[PATCH v3 02/38] dt-bindings: mmc: tegra: Add pad voltage control properties
    Date
    Document the pinctrl bindings used by the SDHCI driver to reconfigure
    pad voltages on controllers supporting multiple voltage levels.

    Signed-off-by: Aapo Vienamo <avienamo@nvidia.com>
    Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
    Reviewed-by: Rob Herring <robh@kernel.org>
    Acked-by: Thierry Reding <treding@nvidia.com>
    ---
    .../bindings/mmc/nvidia,tegra20-sdhci.txt | 22 +++++++++++++++++++
    1 file changed, 22 insertions(+)

    diff --git a/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt b/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
    index 9bce57862ed6..90c214dbfb16 100644
    --- a/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
    +++ b/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
    @@ -38,3 +38,25 @@ sdhci@c8000200 {
    power-gpios = <&gpio 155 0>; /* gpio PT3 */
    bus-width = <8>;
    };
    +
    +Optional properties for Tegra210 and Tegra186:
    +- pinctrl-names, pinctrl-0, pinctrl-1 : Specify pad voltage
    + configurations. Valid pinctrl-names are "sdmmc-3v3" and "sdmmc-1v8"
    + for controllers supporting multiple voltage levels. The order of names
    + should correspond to the pin configuration states in pinctrl-0 and
    + pinctrl-1.
    +
    +Example:
    +sdhci@700b0000 {
    + compatible = "nvidia,tegra210-sdhci", "nvidia,tegra124-sdhci";
    + reg = <0x0 0x700b0000 0x0 0x200>;
    + interrupts = <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>;
    + clocks = <&tegra_car TEGRA210_CLK_SDMMC1>;
    + clock-names = "sdhci";
    + resets = <&tegra_car 14>;
    + reset-names = "sdhci";
    + pinctrl-names = "sdmmc-3v3", "sdmmc-1v8";
    + pinctrl-0 = <&sdmmc1_3v3>;
    + pinctrl-1 = <&sdmmc1_1v8>;
    + status = "disabled";
    +};
    --
    2.18.0
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