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

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Date:	Wed, 11 Mar 2015 15:13:58 -0700
From:	Doug Anderson <dianders@...omium.org>
To:	Heiko Stübner <heiko@...ech.de>
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>,
	"open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 3/3] ARM: dts: Specify VMMC and VQMMC on rk3288-evb

Heiko,

On Tue, Jan 6, 2015 at 9:44 AM, Heiko Stübner <heiko@...ech.de> wrote:
> 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.

OK, I found the problem.  I've got a 1.0 board and the associated
schematics.  Supporting your 2.0 board with the extra regulator should
be no problem though.

Patch coming up shortly.

-Doug
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