linux-kernel - Re: [PATCH v2 2/4] ARM: dts: Enable emmc and sdmmc on the rk3288-evb boards

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Date:	Thu, 31 Jul 2014 16:44:39 -0700
From:	Doug Anderson <dianders@...omium.org>
To:	Heiko Stuebner <heiko@...ech.de>,
	Seungwon Jeon <tgih.jun@...sung.com>,
	Jaehoon Chung <jh80.chung@...sung.com>,
	Chris Ball <chris@...ntf.net>,
	Ulf Hansson <ulf.hansson@...aro.org>
Cc:	Addy Ke <addy.ke@...k-chips.com>,
	Kever Yang <kever.yang@...k-chips.com>,
	Sonny Rao <sonnyrao@...omium.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Doug Anderson <dianders@...omium.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 v2 2/4] ARM: dts: Enable emmc and sdmmc on the rk3288-evb boards

Hi,

On Thu, Jul 31, 2014 at 9:13 AM, Doug Anderson <dianders@...omium.org> wrote:
> This adds support for the sdmmc and emmc ports on the rk3288 using the
> currently posted driver from Addy at:
>   https://patchwork.kernel.org/patch/4653631/
>
> This enables basic SD and eMMC support.  Things are not yet running at
> the fastest speed and we don't have the regulators specified, but we
> can at least use the eMMC and SD cards now.
>
> A few notes:
> * This is not baesd on Jaehoon's patch series removing the slot node,
>   but it does use new syntax like putting the bus width at the top
>   level and using the new cap-mmc-highspeed / cap-sd-highspeed.  A
>   future patch will modify this one to remove the slot node.
>
> Signed-off-by: Doug Anderson <dianders@...omium.org>
> Acked-by: Arnd Bergmann <arnd@...db.de>
> ---
> Changes in v2:
> - Squashed in the DDR50 mode since Addy spun his patch.
> - New patchwork link for Addy's patch
>
>  arch/arm/boot/dts/rk3288-evb.dtsi | 33 +++++++++++++++++++++++++++++++++
>  1 file changed, 33 insertions(+)
>
> diff --git a/arch/arm/boot/dts/rk3288-evb.dtsi b/arch/arm/boot/dts/rk3288-evb.dtsi
> index 749e20d..ec580fa 100644
> --- a/arch/arm/boot/dts/rk3288-evb.dtsi
> +++ b/arch/arm/boot/dts/rk3288-evb.dtsi
> @@ -37,6 +37,39 @@
>         };
>  };
>
> +&emmc {
> +       broken-cd;
> +       bus-width = <8>;
> +       cap-mmc-highspeed;
> +       mmc-ddr-1_8v;

Strangely DDR mode started failing all of a sudden for me.  Even going
back to old git hashes made things fail.  ...I'd be curious to know if
DDR mode is working for others.

-Doug
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