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From: Heiko =?ISO-8859-1?Q?St=FCbner?= <heiko@sntech.de>
To: Doug Anderson <dianders@chromium.org>
Cc: Ulf Hansson <ulf.hansson@linaro.org>,
        Jaehoon Chung <jh80.chung@samsung.com>,
        Seungwon Jeon <tgih.jun@samsung.com>, Mark Brown <broonie@kernel.org>,
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        linux-rockchip@lists.infradead.org,
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        pawel.moll@arm.com, mark.rutland@arm.com,
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Subject: Re: [PATCH v3 3/3] ARM: dts: Specify VMMC and VQMMC on rk3288-evb
Date: Tue, 06 Jan 2015 18:44:13 +0100
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Hi Doug,

Am Montag, 15. Dezember 2014, 16:22:20 schrieb Doug Anderson:
> Specifying these rails should eventually let us do UHS.
> 
> Signed-off-by: Doug Anderson <dianders@chromium.org>
> ---
> Changes in v3: None
> Changes in v2:
> - Fix subject line
> 
>  arch/arm/boot/dts/rk3288-evb.dtsi | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/rk3288-evb.dtsi
> b/arch/arm/boot/dts/rk3288-evb.dtsi index 3e067dd..d660fe6 100644
> --- a/arch/arm/boot/dts/rk3288-evb.dtsi
> +++ b/arch/arm/boot/dts/rk3288-evb.dtsi
> @@ -114,6 +114,8 @@
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&sdmmc_clk &sdmmc_cmd &sdmmc_cd &sdmmc_bus4>;
>  	status = "okay";
> +	vmmc-supply = <&vcc_io>;

according to the schematics there is a switch between the card and vcc_io with 
a controlling pin called SDMMC_PWR providing a supply called vcc_sd.

So there should probably be a fixed-regulator get introduced for this, like the 
older rockchip boards do.


Heiko