Re: [PATCH] arm64: dts: hikey: Revert "Enable HS200 mode on eMMC"

[Robin Murphy]

Hi John,

On 23/01/2019 20:06, John Stultz wrote:
> From: Alistair Strachan <astrachan@xxxxxxxxxx>
>
> This reverts commit abd7d0972a192ee653efc7b151a6af69db58f2bb. This
> change was already partially reverted by John Stultz in commit
> 9c6d26df1fae ("arm64: dts: hikey: Fix eMMC corruption regression").
>
> This change appears to cause controller resets and block read failures
> which prevents successful booting on some hikey boards.

FWIW, you might want to have a play with the pinctrl settings - I've 
seen various flakiness with HS200 eMMCs on Rockchip boards which could 
be solved by bumping up the drive strength.

Robin.

> Cc: Ryan Grachek <ryan@xxxxxxxxx>
> Cc: Wei Xu <xuwei5@xxxxxxxxxxxxx>
> Cc: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>
> Cc: Rob Herring <robh+dt@xxxxxxxxxx>
> Cc: Mark Rutland <mark.rutland@xxxxxxx>
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: stable <stable@xxxxxxxxxxxxxxx> #4.17+
> Signed-off-by: Alistair Strachan <astrachan@xxxxxxxxxx>
> Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
> ---
>   arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts | 1 -
>   1 file changed, 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
> index 6102350..7092460 100644
> --- a/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
> +++ b/arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts
> @@ -300,7 +300,6 @@
>   
>   		dwmmc_0: dwmmc0@f723d000 {
>   			cap-mmc-highspeed;
> -			mmc-hs200-1_8v;
>   			non-removable;
>   			bus-width = <0x8>;
>   			vmmc-supply = <&ldo19>;