linux-kernel - Re: [PATCH v3 3/3] ARM: dts: Specify VMMC and VQMMC on rk3288-evb

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Date:	Tue, 06 Jan 2015 18:44:13 +0100
From:	Heiko Stübner <heiko@...ech.de>
To:	Doug Anderson <dianders@...omium.org>
Cc:	Ulf Hansson <ulf.hansson@...aro.org>,
	Jaehoon Chung <jh80.chung@...sung.com>,
	Seungwon Jeon <tgih.jun@...sung.com>,
	Mark Brown <broonie@...nel.org>,
	Alexandru Stan <amstan@...omium.org>,
	Alim Akhtar <alim.akhtar@...sung.com>,
	Sonny Rao <sonnyrao@...omium.org>,
	Andrew Bresticker <abrestic@...omium.org>,
	linux-rockchip@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org, robh+dt@...nel.org,
	pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	linux@....linux.org.uk, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/3] ARM: dts: Specify VMMC and VQMMC on rk3288-evb

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@...omium.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
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