Re: [PATCH 4/7] arm64: dts: actions: Add uSD and eMMC support for Bubblegum96

Andreas Färber
2019-06-10T14:08:34Z

Hi Mani,

Am 08.06.19 um 21:53 schrieb Manivannan Sadhasivam:
> Add uSD and eMMC support for Bubblegum96 board based on Actions Semi
> Owl SoC.

What information does "based on Actions Semi Owl SoC" give us? :)
The board name should be unique enough - Owl is a family of SoCs,
"actions:" is in the subject and "s900-" is in the filename.

> SD0 is connected to uSD slot and SD2 is connected to eMMC.

Suggest to add that as comments above the two nodes instead.

> Since there is no PMIC support added yet, fixed regulator has been
> used as a regulator node.

Fine with me - maybe add a comment and make sure it's aligned with the
schematics naming wrt PMIC.

>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> ---
> .../boot/dts/actions/s900-bubblegum-96.dts | 50 +++++++++++++++++++
> 1 file changed, 50 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/actions/s900-bubblegum-96.dts b/arch/arm64/boot/dts/actions/s900-bubblegum-96.dts
> index 732daaa6e9d3..3b596d72de25 100644
> --- a/arch/arm64/boot/dts/actions/s900-bubblegum-96.dts
> +++ b/arch/arm64/boot/dts/actions/s900-bubblegum-96.dts
> @@ -13,6 +13,9 @@
>
> aliases {
> serial5 = &uart5;
> + mmc0 = &mmc0;
> + mmc1 = &mmc1;
> + mmc2 = &mmc2;

Sort them alphabetically?

> };
>
> chosen {
> @@ -23,6 +26,14 @@
> device_type = "memory";
> reg = <0x0 0x0 0x0 0x80000000>;
> };
> +
> + reg_3p1v: regulator-3p1v {
> + compatible = "regulator-fixed";
> + regulator-name = "fixed-3.1V";
> + regulator-min-microvolt = <3100000>;
> + regulator-max-microvolt = <3100000>;
> + regulator-always-on;
> + };
> };
>
> &i2c0 {
> @@ -241,6 +252,45 @@
> bias-pull-up;
> };
> };
> +
> + mmc0_default: mmc0_default {
> + pinmux {
> + groups = "sd0_d0_mfp", "sd0_d1_mfp", "sd0_d2_d3_mfp",
> + "sd0_cmd_mfp", "sd0_clk_mfp";
> + function = "sd0";
> + };
> + };
> +
> + mmc2_default: mmc2_default {
> + pinmux {
> + groups = "nand0_d0_ceb3_mfp";
> + function = "sd2";
> + };
> + };

Wouldn't it make more sense to move these and the below pinctrl-* to
s900.dtsi for sharing with other theoretical boards? I really dislike
the imx model where pin muxing is duplicated into each individual board.

Regards,
Andreas

> +};
> +
> +&mmc0 {
> + status = "okay";
> + pinctrl-names = "default";
> + pinctrl-0 = <&mmc0_default>;
> + no-sdio;
> + no-mmc;
> + no-1-8-v;
> + cd-gpios = <&pinctrl 120 GPIO_ACTIVE_LOW>;
> + bus-width = <4>;
> + vmmc-supply = <&reg_3p1v>;
> + vqmmc-supply = <&reg_3p1v>;
> +};
> +
> +&mmc2 {
> + status = "okay";
> + pinctrl-names = "default";
> + pinctrl-0 = <&mmc2_default>;
> + no-sdio;
> + no-sd;
> + non-removable;
> + bus-width = <8>;
> + vmmc-supply = <&reg_3p1v>;
> };
>
> &timer {

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