linux-kernel - Re: [PATCH 1/2] ARM: dts: rockchip: remove excess sd properties for firefly reload

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Date:	Sun, 14 Aug 2016 14:30:51 +0200
From:	Heiko Stuebner <heiko@...ech.de>
To:	Randy Li <ayaka@...lik.info>
Cc:	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-rockchip@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org, linux@...linux.org.uk,
	mark.rutland@....com
Subject: Re: [PATCH 1/2] ARM: dts: rockchip: remove excess sd properties for firefly reload

Am Sonntag, 14. August 2016, 19:27:23 CEST schrieb Randy Li:
> Because of a bug in hardware design, the sdcard at firefly
> rk3288 reload board can't switch the io voltage level to 1.8v.
> 
> Signed-off-by: Randy Li <ayaka@...lik.info>
> ---
>  arch/arm/boot/dts/rk3288-firefly-reload.dts | 7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/rk3288-firefly-reload.dts
> b/arch/arm/boot/dts/rk3288-firefly-reload.dts index 43145d1..a2b1f14 100644
> --- a/arch/arm/boot/dts/rk3288-firefly-reload.dts
> +++ b/arch/arm/boot/dts/rk3288-firefly-reload.dts
> @@ -202,18 +202,13 @@
>  	bus-width = <4>;
>  	cap-mmc-highspeed;
>  	cap-sd-highspeed;
> -	sd-uhs-sdr12;
> -	sd-uhs-sdr25;
> -	sd-uhs-sdr50;
> -	sd-uhs-sdr104;
> -	sd-uhs-ddr50;
>  	card-detect-delay = <200>;
>  	disable-wp;
>  	num-slots = <1>;
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&sdmmc_clk>, <&sdmmc_cmd>, <&sdmmc_cd>, <&sdmmc_bus4>;
>  	vmmc-supply = <&vcc_sd>;
> -	vqmmc-supply = <&vccio_sd>;
> +	vqmmc-supply = <&vcc_sd>;

that looks wrong. vccio_sd is still the vqmmc supply in the schematics even 
though we don't want to switch to 1.8V . But that regulator should still be 
controllable without needing a regulator-always-on in the future.


Heiko