linux-kernel - Re: [PATCH 2/4] mmc: dt-bindings: update Mediatek MMC bindings

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Date:	Tue, 13 Oct 2015 11:38:45 +0100
From:	Mark Rutland <mark.rutland@....com>
To:	Chaotian Jing <chaotian.jing@...iatek.com>
Cc:	Ulf Hansson <ulf.hansson@...aro.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Daniel Kurtz <djkurtz@...omium.org>,
	linux-kernel@...r.kernel.org, Lars-Peter Clausen <lars@...afoo.de>,
	Howard Chen <ibanezchen@...il.com>, devicetree@...r.kernel.org,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Hans de Goede <hdegoede@...hat.com>,
	Rob Herring <robh+dt@...nel.org>,
	linux-mediatek@...ts.infradead.org,
	Matthias Brugger <matthias.bgg@...il.com>,
	linux-arm-kernel@...ts.infradead.org, srv_heupstream@...iatek.com,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	linux-mmc@...r.kernel.org, Adrian Hunter <adrian.hunter@...el.com>,
	Kumar Gala <galak@...eaurora.org>,
	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
Subject: Re: [PATCH 2/4] mmc: dt-bindings: update Mediatek MMC bindings

On Tue, Oct 13, 2015 at 05:37:56PM +0800, Chaotian Jing wrote:
> Add 400Mhz clock source for HS400 mode
> 
> Signed-off-by: Chaotian Jing <chaotian.jing@...iatek.com>
> ---
>  Documentation/devicetree/bindings/mmc/mtk-sd.txt | 12 ++++++++++--
>  1 file changed, 10 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.txt b/Documentation/devicetree/bindings/mmc/mtk-sd.txt
> index a1adfa4..745bee2 100644
> --- a/Documentation/devicetree/bindings/mmc/mtk-sd.txt
> +++ b/Documentation/devicetree/bindings/mmc/mtk-sd.txt
> @@ -17,6 +17,11 @@ Required properties:
>  - vmmc-supply: power to the Core
>  - vqmmc-supply: power to the IO
>  
> +Optional properties:
> +- clocks: 400mhz clock source for HS400
> +- clock-names: "400mhz"

Is that really what the input line is called?

> +- hs400-ds-delay: HS400 DS delay setting

What is the format of this? Where can I derive the correct value?

Mark.

> +
>  Examples:
>  mmc0: mmc@...30000 {
>  	compatible = "mediatek,mt8173-mmc", "mediatek,mt8135-mmc";
> @@ -24,9 +29,12 @@ mmc0: mmc@...30000 {
>  	interrupts = <GIC_SPI 39 IRQ_TYPE_LEVEL_LOW>;
>  	vmmc-supply = <&mt6397_vemc_3v3_reg>;
>  	vqmmc-supply = <&mt6397_vio18_reg>;
> -	clocks = <&pericfg CLK_PERI_MSDC30_0>, <&topckgen CLK_TOP_MSDC50_0_H_SEL>;
> -	clock-names = "source", "hclk";
> +	clocks = <&pericfg CLK_PERI_MSDC30_0>,
> +	         <&topckgen CLK_TOP_MSDC50_0_H_SEL>,
> +		 <&topckgen CLK_TOP_MSDCPLL_D2> ;
> +	clock-names = "source", "hclk", "400mhz";
>  	pinctrl-names = "default", "state_uhs";
>  	pinctrl-0 = <&mmc0_pins_default>;
>  	pinctrl-1 = <&mmc0_pins_uhs>;
> +	hs400-ds-delay = <0x14015>;
>  };
> -- 
> 1.8.1.1.dirty
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> 
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