linux-kernel - Re: [PATCH] arm64: dts: hikey: Enable HS200 mode on eMMC

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Date:   Fri, 2 Mar 2018 16:02:49 +0000
From:   Wei Xu <xuwei5@...ilicon.com>
To:     oscardagrach <ryan@...ted.us>
CC:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: dts: hikey: Enable HS200 mode on eMMC

Hi Ryan,

On 2018/1/17 20:35, oscardagrach wrote:
> According to the hi6220 datasheet, the MMC controller is JEDEC eMMC 4.5
> compliant, in addition to supporting a clock of up to 150MHz. The Hikey
> schematic also indicates the device utilizes 1.8v signaling. Define these
> parameters in the device tree to enable HS200 mode.
> 
> Signed-off-by: Ryan Grachek <ryan@...ted.us>
> ---

Applied into hisilicon dt tree.
Thanks!

BR,
Wei

>  arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
> index 3aee6123d161..964e43e05ac6 100644
> --- a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
> +++ b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
> @@ -299,7 +299,9 @@
>  		/* GPIO blocks 16 thru 19 do not appear to be routed to pins */
>  
>  		dwmmc_0: dwmmc0@...3d000 {
> +			max-frequency = <150000000>;
>  			cap-mmc-highspeed;
> +			mmc-hs200-1_8v;
>  			non-removable;
>  			bus-width = <0x8>;
>  			vmmc-supply = <&ldo19>;
>