linux-kernel - Re: [PATCH] arm64: dts: exynos: add the mshc

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Date:   Fri, 18 Nov 2016 11:38:09 +0100
From:   Marek Szyprowski <m.szyprowski@...sung.com>
To:     Jaehoon Chung <jh80.chung@...sung.com>,
        linux-samsung-soc@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        kgene@...nel.org, krzk@...nel.org, cw00.choi@...sung.com,
        robh+dt@...nel.org, mark.rutland@....com, catalin.marinas@....com,
        will.deacon@....com
Subject: Re: [PATCH] arm64: dts: exynos: add the mshc_2 node for supporting
 T-Flash

Dear Jaehoon,


On 2016-11-18 08:12, Jaehoon Chung wrote:
> Add the mshc_2 node for supporting T-flash.
>
> And it needs to add the "mshc*" aliases. Because dwmmc driver should be
> assigned to "ctrl_id" after parsing to "mshc".
> If there is no aliases for mshc, then it might be set to the wrong
> capabilities.
>
> Signed-off-by: Jaehoon Chung <jh80.chung@...sung.com>
> ---
>   arch/arm64/boot/dts/exynos/exynos5433-tm2.dts | 19 +++++++++++++++++++
>   1 file changed, 19 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts b/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts
> index 9ea3f32..75dab01 100644
> --- a/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts
> +++ b/arch/arm64/boot/dts/exynos/exynos5433-tm2.dts
> @@ -42,6 +42,8 @@
>   		spi2 = &spi_2;
>   		spi3 = &spi_3;
>   		spi4 = &spi_4;
> +		mshc0 = &mshc_0;
> +		mshc2 = &mshc_2;
>   	};
>   
>   	chosen {
> @@ -661,6 +663,23 @@
>   	assigned-clock-rates = <800000000>;
>   };
>   
> +&mshc_2 {
> +	status = "okay";
> +	num-slots = <1>;
> +	cap-sd-highspeed;
> +	disable-wp;
> +	cd-gpios = <&gpa2 4 0>;

cd-gpios = <&gpa2 4 GPIO_ACTIVE_HIGH>;

> +	cd-inverted;
> +	card-detect-delay = <200>;
> +	samsung,dw-mshc-ciu-div = <3>;
> +	samsung,dw-mshc-sdr-timing = <0 4>;
> +	samsung,dw-mshc-ddr-timing = <0 2>;
> +	fifo-depth = <0x80>;
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&sd2_clk &sd2_cmd &sd2_bus1 &sd2_bus4>;
> +	bus-width = <4>;
> +};
> +
>   &pinctrl_alive {
>   	pinctrl-names = "default";
>   	pinctrl-0 = <&initial_alive>;

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland