linux-kernel - Re: [PATCH 1/2] dt-bindings: mmc: add DT bindings for Milbeaut SD controller

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Date:   Mon, 29 Apr 2019 12:24:16 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Takao Orito <orito.takao@...ionext.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        DTML <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Masami Hiramatsu <masami.hiramatsu@...aro.org>,
        Jaswinder Singh <jaswinder.singh@...aro.org>,
        sugaya.taichi@...ionext.com, kasai.kazuhiro@...ionext.com,
        kanematsu.shinji@...ionext.com
Subject: Re: [PATCH 1/2] dt-bindings: mmc: add DT bindings for Milbeaut SD controller

On Fri, 26 Apr 2019 at 04:04, Takao Orito <orito.takao@...ionext.com> wrote:
>
> Signed-off-by: Takao Orito <orito.takao@...ionext.com>
> ---
>  .../devicetree/bindings/mmc/sdhci-milbeaut.txt     | 35 ++++++++++++++++++++++
>  1 file changed, 35 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mmc/sdhci-milbeaut.txt
>
> diff --git a/Documentation/devicetree/bindings/mmc/sdhci-milbeaut.txt b/Documentation/devicetree/bindings/mmc/sdhci-milbeaut.txt
> new file mode 100644
> index 0000000..7008462
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mmc/sdhci-milbeaut.txt
> @@ -0,0 +1,35 @@
> +* SOCIONEXT SDHCI controller
> +
> +This file documents differences between the core properties in mmc.txt
> +and the properties used by the sdhci_milbeaut driver.
> +
> +Required properties:
> +- compatible: "socionext,milbeaut-m10v-sdhci-3.0"
> +- clocks: Must contain an entry for each entry in clock-names. It is a
> +  list of phandles and clock-specifier pairs.
> +  See ../clocks/clock-bindings.txt for details.
> +- clock-names: Should contain the following two entries:
> +       "iface" - clock used for sdhci interface
> +       "core"  - core clock for sdhci controller
> +
> +Optional properties:
> +- vqmmc-supply: phandle to the regulator device tree node, mentioned
> +  as the VCCQ/VDD_IO supply in the eMMC/SD specs.
> +- fujitsu,cmd-dat-delay-select: boolean property indicating that this host
> +  requires the CMD_DAT_DELAY control to be enabled.
> +- sni,mmc-power-gpio: set property indicating that power on or off needs
> +  control of gpios.

Please use a vmmc-supply instead of "power-gpio" (which means you need
to model this as a fixed GPIO regulator).

> +
> +Example:
> +       sdhci3: mmc@...10000 {
> +               compatible = "socionext,milbeaut-m10v-sdhci-3.0";
> +               reg = <0x1b010000 0x10000>;
> +               interrupts = <0 265 0x4>;
> +               voltage-ranges = <3300 3300>;
> +               bus-width = <4>;
> +               clocks = <&clk 7>, <&ahb_clk>;
> +               clock-names = "core", "iface";
> +               cap-sdio-irq;
> +               sni,mmc-power-gpio = <&pinctrl 53 GPIO_ACTIVE_HIGH>;
> +                       fujitsu,cmd-dat-delay-select;
> +       };
> --
> 1.9.1
>
>

Kind regards
Uffe