On Tue, Dec 29, 2020 at 11:17:26PM +0200, Cristian Ciocaltea wrote:
> Add uSD support for RoseapplePi SBC using a fixed regulator as a
> temporary solution until PMIC support becomes available.
>
> Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxx>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
Thanks,
Mani
> ---
> Changes in v3:
> - None
>
> arch/arm/boot/dts/owl-s500-roseapplepi.dts | 50 ++++++++++++++++++++++
> 1 file changed, 50 insertions(+)
>
> diff --git a/arch/arm/boot/dts/owl-s500-roseapplepi.dts b/arch/arm/boot/dts/owl-s500-roseapplepi.dts
> index 800edf5d2d12..fe9ae3619422 100644
> --- a/arch/arm/boot/dts/owl-s500-roseapplepi.dts
> +++ b/arch/arm/boot/dts/owl-s500-roseapplepi.dts
> @@ -14,6 +14,7 @@ / {
> model = "Roseapple Pi";
>
> aliases {
> + mmc0 = &mmc0;
> serial2 = &uart2;
> };
>
> @@ -25,6 +26,55 @@ memory@0 {
> device_type = "memory";
> reg = <0x0 0x80000000>; /* 2GB */
> };
> +
> + /* Fixed regulator used in the absence of PMIC */
> + sd_vcc: sd-vcc {
> + compatible = "regulator-fixed";
> + regulator-name = "fixed-3.1V";
> + regulator-min-microvolt = <3100000>;
> + regulator-max-microvolt = <3100000>;
> + regulator-always-on;
> + };
> +};
> +
> +&pinctrl {
> + mmc0_pins: mmc0-pins {
> + pinmux {
> + groups = "sd0_d0_mfp", "sd0_d1_mfp", "sd0_d2_d3_mfp",
> + "sd0_cmd_mfp", "sd0_clk_mfp";
> + function = "sd0";
> + };
> +
> + drv-pinconf {
> + groups = "sd0_d0_d3_drv", "sd0_cmd_drv", "sd0_clk_drv";
> + drive-strength = <8>;
> + };
> +
> + bias0-pinconf {
> + pins = "sd0_d0", "sd0_d1", "sd0_d2",
> + "sd0_d3", "sd0_cmd";
> + bias-pull-up;
> + };
> +
> + bias1-pinconf {
> + pins = "sd0_clk";
> + bias-pull-down;
> + };
> + };
> +};
> +
> +/* uSD */
> +&mmc0 {
> + status = "okay";
> + pinctrl-names = "default";
> + pinctrl-0 = <&mmc0_pins>;
> + no-sdio;
> + no-mmc;
> + no-1-8-v;
> + cd-gpios = <&pinctrl 117 GPIO_ACTIVE_LOW>;
> + bus-width = <4>;
> + vmmc-supply = <&sd_vcc>;
> + vqmmc-supply = <&sd_vcc>;
> };
>
> &twd_timer {
> --
> 2.30.0
>
