linux-kernel - Re: [PATCH] ARM: dts: exynos: Use fixed index for the MMC devices

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Date:   Fri, 6 Nov 2020 15:00:43 +0900
From:   Jaehoon Chung <jh80.chung@...sung.com>
To:     Marek Szyprowski <m.szyprowski@...sung.com>,
        linux-samsung-soc@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzk@...nel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Markus Reichl <m.reichl@...etechno.de>,
        Rob Herring <robh+dt@...nel.org>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: exynos: Use fixed index for the MMC devices

On 11/5/20 8:48 PM, Marek Szyprowski wrote:
> Recently introduced asynchronous probe on the MMC devices can shuffle
> block IDs in the system. Pin them to values equal to the physical MMC bus
> number to ease booting in environments where UUIDs are not practical.
> 
> Use newly introduced aliases for mmcblk devices from commit fa2d0aa96941
> ("mmc: core: Allow setting slot index via device tree alias").
> 
> Suggested-by: Markus Reichl <m.reichl@...etechno.de>
> Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>

Reviewed-by: Jaehoon Chung <jh80.chung@...sung.com>

Best Regards,
Jaehoon Chung

> ---
>  arch/arm/boot/dts/exynos3250.dtsi | 3 +++
>  arch/arm/boot/dts/exynos4.dtsi    | 2 ++
>  arch/arm/boot/dts/exynos4210.dtsi | 1 +
>  arch/arm/boot/dts/exynos4412.dtsi | 1 +
>  arch/arm/boot/dts/exynos5250.dtsi | 4 ++++
>  arch/arm/boot/dts/exynos5260.dtsi | 3 +++
>  arch/arm/boot/dts/exynos5410.dtsi | 3 +++
>  arch/arm/boot/dts/exynos5420.dtsi | 3 +++
>  8 files changed, 20 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/exynos3250.dtsi b/arch/arm/boot/dts/exynos3250.dtsi
> index 75ed82600ec8..510080bb4102 100644
> --- a/arch/arm/boot/dts/exynos3250.dtsi
> +++ b/arch/arm/boot/dts/exynos3250.dtsi
> @@ -28,6 +28,9 @@
>  	aliases {
>  		pinctrl0 = &pinctrl_0;
>  		pinctrl1 = &pinctrl_1;
> +		mmc0 = &mshc_0;
> +		mmc1 = &mshc_1;
> +		mmc2 = &mshc_2;
>  		mshc0 = &mshc_0;
>  		mshc1 = &mshc_1;
>  		mshc2 = &mshc_2;
> diff --git a/arch/arm/boot/dts/exynos4.dtsi b/arch/arm/boot/dts/exynos4.dtsi
> index a1e54449f33f..e266f890eea4 100644
> --- a/arch/arm/boot/dts/exynos4.dtsi
> +++ b/arch/arm/boot/dts/exynos4.dtsi
> @@ -45,6 +45,8 @@
>  		fimc1 = &fimc_1;
>  		fimc2 = &fimc_2;
>  		fimc3 = &fimc_3;
> +		mmc1 = &sdhci_1;
> +		mmc2 = &sdhci_2;
>  		serial0 = &serial_0;
>  		serial1 = &serial_1;
>  		serial2 = &serial_2;
> diff --git a/arch/arm/boot/dts/exynos4210.dtsi b/arch/arm/boot/dts/exynos4210.dtsi
> index fddc661ded28..f1d0d5959b7f 100644
> --- a/arch/arm/boot/dts/exynos4210.dtsi
> +++ b/arch/arm/boot/dts/exynos4210.dtsi
> @@ -23,6 +23,7 @@
>  	compatible = "samsung,exynos4210", "samsung,exynos4";
>  
>  	aliases {
> +		mmc0 = &sdhci_0;
>  		pinctrl0 = &pinctrl_0;
>  		pinctrl1 = &pinctrl_1;
>  		pinctrl2 = &pinctrl_2;
> diff --git a/arch/arm/boot/dts/exynos4412.dtsi b/arch/arm/boot/dts/exynos4412.dtsi
> index fa8e8d6bc4d5..9fcf7383eb9d 100644
> --- a/arch/arm/boot/dts/exynos4412.dtsi
> +++ b/arch/arm/boot/dts/exynos4412.dtsi
> @@ -28,6 +28,7 @@
>  		pinctrl3 = &pinctrl_3;
>  		fimc-lite0 = &fimc_lite_0;
>  		fimc-lite1 = &fimc_lite_1;
> +		mmc0 = &mshc_0;
>  		mshc0 = &mshc_0;
>  	};
>  
> diff --git a/arch/arm/boot/dts/exynos5250.dtsi b/arch/arm/boot/dts/exynos5250.dtsi
> index 84677332a5a2..0a0436f92fac 100644
> --- a/arch/arm/boot/dts/exynos5250.dtsi
> +++ b/arch/arm/boot/dts/exynos5250.dtsi
> @@ -30,6 +30,10 @@
>  		gsc1 = &gsc_1;
>  		gsc2 = &gsc_2;
>  		gsc3 = &gsc_3;
> +		mmc0 = &mmc_0;
> +		mmc1 = &mmc_1;
> +		mmc2 = &mmc_2;
> +		mmc3 = &mmc_3;
>  		mshc0 = &mmc_0;
>  		mshc1 = &mmc_1;
>  		mshc2 = &mmc_2;
> diff --git a/arch/arm/boot/dts/exynos5260.dtsi b/arch/arm/boot/dts/exynos5260.dtsi
> index 973448c4ad93..64bf1d8dc33b 100644
> --- a/arch/arm/boot/dts/exynos5260.dtsi
> +++ b/arch/arm/boot/dts/exynos5260.dtsi
> @@ -21,6 +21,9 @@
>  		i2c1 = &hsi2c_1;
>  		i2c2 = &hsi2c_2;
>  		i2c3 = &hsi2c_3;
> +		mmc0 = &mmc_0;
> +		mmc1 = &mmc_1;
> +		mmc2 = &mmc_2;
>  		pinctrl0 = &pinctrl_0;
>  		pinctrl1 = &pinctrl_1;
>  		pinctrl2 = &pinctrl_2;
> diff --git a/arch/arm/boot/dts/exynos5410.dtsi b/arch/arm/boot/dts/exynos5410.dtsi
> index 584ce62361b1..503859153769 100644
> --- a/arch/arm/boot/dts/exynos5410.dtsi
> +++ b/arch/arm/boot/dts/exynos5410.dtsi
> @@ -24,6 +24,9 @@
>  		pinctrl1 = &pinctrl_1;
>  		pinctrl2 = &pinctrl_2;
>  		pinctrl3 = &pinctrl_3;
> +		mmc0 = &mmc_0;
> +		mmc1 = &mmc_1;
> +		mmc2 = &mmc_2;
>  	};
>  
>  	cpus {
> diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi
> index 23a8fd5c8a6e..3a3eadd890fb 100644
> --- a/arch/arm/boot/dts/exynos5420.dtsi
> +++ b/arch/arm/boot/dts/exynos5420.dtsi
> @@ -19,6 +19,9 @@
>  	compatible = "samsung,exynos5420", "samsung,exynos5";
>  
>  	aliases {
> +		mmc0 = &mmc_0;
> +		mmc1 = &mmc_1;
> +		mmc2 = &mmc_2;
>  		mshc0 = &mmc_0;
>  		mshc1 = &mmc_1;
>  		mshc2 = &mmc_2;
>