linux-kernel - Re: [PATCH] ARM: dts: exynos: remove the cd-gpios property for eMMC of odroid-xu3/4

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Date:   Mon, 21 Nov 2016 19:06:05 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Jaehoon Chung <jh80.chung@...sung.com>
Cc:     linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, kgene@...nel.org, krzk@...nel.org,
        cw00.choi@...sung.com, robh+dt@...nel.org, mark.rutland@....com,
        catalin.marinas@....com, will.deacon@....com,
        m.szyprowski@...sung.com, a.hajda@...sung.com,
        jy0922.shim@...sung.com
Subject: Re: [PATCH] ARM: dts: exynos: remove the cd-gpios property for eMMC
 of odroid-xu3/4

On Mon, Nov 21, 2016 at 04:10:32PM +0900, Jaehoon Chung wrote:
> Odroid-xu3/4 didn't need to use the cd-gpios for detecting card.
> Because Host controller has the CDETECT register through SDx_CDN line.
> Host controller can know whether card is inserted or not with this
> register.
> 
> When i have checked the Odroid-xu3/4, they are using CDETECT register.
> (Not using exteranl cd-gpio.)

Makes sense. Just one question: the sd0_cd pinctrl setting should stay,
right?

Best regards,
Krzysztof

> Fixes: fb1aeedb61ad ("ARM: dts: add mmc detect gpio for exynos5422-odroidxu3")
> Signed-off-by: Jaehoon Chung <jh80.chung@...sung.com>
> ---
>  arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
> index 9e63328..05b9afdd 100644
> --- a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
> +++ b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi
> @@ -510,7 +510,6 @@
>  &mmc_0 {
>  	status = "okay";
>  	mmc-pwrseq = <&emmc_pwrseq>;
> -	cd-gpios = <&gpc0 2 GPIO_ACTIVE_LOW>;
>  	card-detect-delay = <200>;
>  	samsung,dw-mshc-ciu-div = <3>;
>  	samsung,dw-mshc-sdr-timing = <0 4>;
> -- 
> 2.10.1
>