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Date:   Sun, 19 Mar 2023 21:13:24 +0100
From:   Henrik Grimler <henrik@...mler.se>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        alim.akhtar@...sung.com, m.szyprowski@...sung.com,
        jenneron@...tonmail.com, markuss.broks@...il.com,
        martin.juecker@...il.com, virag.david003@...il.com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
        phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht,
        Valentine Iourine <iourine@...rine.msk.su>
Subject: Re: [PATCH v5 2/2] ARM: dts: exynos: add mmc aliases

Hi Krzysztof,

On Fri, Mar 17, 2023 at 01:28:02PM +0100, Krzysztof Kozlowski wrote:
> On 16/03/2023 22:15, Henrik Grimler wrote:
> > Add aliases for eMMC, SD card and WiFi where applicable, so that
> > assigned mmc indeces are always the same.
> > 
> > Co-developed-by: Anton Bambura <jenneron@...tonmail.com>
> > Signed-off-by: Anton Bambura <jenneron@...tonmail.com>
> > [ Tested on exynos5800-peach-pi ]
> > Tested-by: Valentine Iourine <iourine@...rine.msk.su>
> > Signed-off-by: Henrik Grimler <henrik@...mler.se>
> > Tested-by: Marek Szyprowski <m.szyprowski@...sung.com>
> > 
> 
> 
> 
> >  	chosen {
> > diff --git a/arch/arm/boot/dts/exynos4210-i9100.dts b/arch/arm/boot/dts/exynos4210-i9100.dts
> > index bba85011ecc9..7051e2c4b391 100644
> > --- a/arch/arm/boot/dts/exynos4210-i9100.dts
> > +++ b/arch/arm/boot/dts/exynos4210-i9100.dts
> > @@ -25,6 +25,12 @@ memory@...00000 {
> >  		reg = <0x40000000 0x40000000>;
> >  	};
> >  
> > +	aliases {
> > +		mmc0 = &sdhci_0;
> > +		mmc2 = &sdhci_2;
> > +		mmc3 = &sdhci_3;
> 
> Here...
> 
> > +	};
> > +
> >  	chosen {
> >  		stdout-path = "serial2:115200n8";
> >  	};
> > diff --git a/arch/arm/boot/dts/exynos4210-origen.dts b/arch/arm/boot/dts/exynos4210-origen.dts
> > index 1103e7f92b57..1970c31410e5 100644
> > --- a/arch/arm/boot/dts/exynos4210-origen.dts
> > +++ b/arch/arm/boot/dts/exynos4210-origen.dts
> > @@ -30,6 +30,11 @@ memory@...00000 {
> >  		       0x70000000 0x10000000>;
> >  	};
> >  
> > +	aliases {
> > +		mmc0 = &sdhci_0;
> 
> here ....
> 
> > +		mmc2 = &sdhci_2;
> > +	};
> > +
> >  	chosen {
> >  		bootargs = "root=/dev/ram0 rw ramdisk=8192 initrd=0x41000000,8M init=/linuxrc";
> >  		stdout-path = "serial2:115200n8";
> > diff --git a/arch/arm/boot/dts/exynos4210-smdkv310.dts b/arch/arm/boot/dts/exynos4210-smdkv310.dts
> > index 181c99eca675..cb74af41e17c 100644
> > --- a/arch/arm/boot/dts/exynos4210-smdkv310.dts
> > +++ b/arch/arm/boot/dts/exynos4210-smdkv310.dts
> > @@ -25,6 +25,10 @@ memory@...00000 {
> >  		reg = <0x40000000 0x80000000>;
> >  	};
> >  
> > +	aliases {
> > +		mmc2 = &sdhci_2;
> > +	};
> > +
> >  	chosen {
> >  		bootargs = "root=/dev/ram0 rw ramdisk=8192 initrd=0x41000000,8M init=/linuxrc";
> >  		stdout-path = "serial1:115200n8";
> > diff --git a/arch/arm/boot/dts/exynos4210-trats.dts b/arch/arm/boot/dts/exynos4210-trats.dts
> > index b8e9dd23fc51..b6b0c116016c 100644
> > --- a/arch/arm/boot/dts/exynos4210-trats.dts
> > +++ b/arch/arm/boot/dts/exynos4210-trats.dts
> > @@ -26,6 +26,12 @@ memory@...00000 {
> >  			0x70000000 0x10000000>;
> >  	};
> >  
> > +	aliases {
> > +		mmc0 = &sdhci_0;
> > +		mmc2 = &sdhci_2;
> > +		mmc3 = &sdhci_3;
> > +	};
> > +
> >  	chosen {
> >  		bootargs = "root=/dev/mmcblk0p5 rootwait earlyprintk panic=5";
> >  		stdout-path = "serial2:115200n8";
> > diff --git a/arch/arm/boot/dts/exynos4210-universal_c210.dts b/arch/arm/boot/dts/exynos4210-universal_c210.dts
> > index 140abfb38e1d..f42cfcbcdcfa 100644
> > --- a/arch/arm/boot/dts/exynos4210-universal_c210.dts
> > +++ b/arch/arm/boot/dts/exynos4210-universal_c210.dts
> > @@ -24,6 +24,12 @@ memory@...00000 {
> >  			0x50000000 0x10000000>;
> >  	};
> >  
> > +	aliases {
> > +		mmc0 = &sdhci_0;
> > +		mmc2 = &sdhci_2;
> 
> 
> Why this is 2? Aliases are continues and match the board. For example
> Universal calls this mmc1 and the next mmc2, not 3.

Not sure I follow, Universal calls sdhci_2 mmc1 in schematics? (I have tried searching for
schematics but cannot really find anything about this board)

> I bet it is the same on Trats and all other boards.

Sure, I can change to mmc0, mmc1 for all 4210 devices.

> > +		mmc3 = &sdhci_3;
> > +	};
> > +
> >  	chosen {
> >  		bootargs = "root=/dev/mmcblk0p5 rw rootwait earlyprintk panic=5 maxcpus=1";
> >  		stdout-path = "serial2:115200n8";
> > diff --git a/arch/arm/boot/dts/exynos4412-itop-elite.dts b/arch/arm/boot/dts/exynos4412-itop-elite.dts
> > index 6260da187e92..0e5419c0eaff 100644
> > --- a/arch/arm/boot/dts/exynos4412-itop-elite.dts
> > +++ b/arch/arm/boot/dts/exynos4412-itop-elite.dts
> > @@ -20,6 +20,10 @@ / {
> >  	model = "TOPEET iTop 4412 Elite board based on Exynos4412";
> >  	compatible = "topeet,itop4412-elite", "samsung,exynos4412", "samsung,exynos4";
> >  
> > +	aliases {
> > +		mmc2 = &sdhci_2;
> 
> mmc1

Ok, will change.

> > +	};
> > +
> >  	chosen {
> >  		bootargs = "root=/dev/mmcblk0p2 rw rootfstype=ext4 rootdelay=1 rootwait";
> >  		stdout-path = "serial2:115200n8";
> > diff --git a/arch/arm/boot/dts/exynos4412-itop-scp-core.dtsi b/arch/arm/boot/dts/exynos4412-itop-scp-core.dtsi
> > index ca8d42b2ce3b..7bc6968af9c3 100644
> > --- a/arch/arm/boot/dts/exynos4412-itop-scp-core.dtsi
> > +++ b/arch/arm/boot/dts/exynos4412-itop-scp-core.dtsi
> > @@ -23,6 +23,10 @@ memory@...00000 {
> >  		reg = <0x40000000 0x40000000>;
> >  	};
> >  
> > +	aliases {
> > +		mmc0 = &mshc_0;
> > +	};
> > +
> >  	firmware@...f000 {
> >  		compatible = "samsung,secure-firmware";
> >  		reg = <0x0203f000 0x1000>;
> > diff --git a/arch/arm/boot/dts/exynos4412-midas.dtsi b/arch/arm/boot/dts/exynos4412-midas.dtsi
> > index 82aed59cba7c..e6b949c1a00f 100644
> > --- a/arch/arm/boot/dts/exynos4412-midas.dtsi
> > +++ b/arch/arm/boot/dts/exynos4412-midas.dtsi
> > @@ -25,6 +25,9 @@ / {
> >  	aliases {
> >  		i2c11 = &i2c_max77693;
> >  		i2c12 = &i2c_max77693_fuel;
> > +		mmc0 = &mshc_0;
> > +		mmc2 = &sdhci_2;
> > +		mmc3 = &sdhci_3;
> 
> This is actually correct.
> 
> >  	};
> >  
> >  	chosen {
> > diff --git a/arch/arm/boot/dts/exynos4412-odroid-common.dtsi b/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
> > index 25e082fda955..45ef7b7ba7e0 100644
> > --- a/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
> > +++ b/arch/arm/boot/dts/exynos4412-odroid-common.dtsi
> > @@ -13,6 +13,11 @@
> >  #include "exynos-mfc-reserved-memory.dtsi"
> >  
> >  / {
> > +	aliases {
> > +		mmc0 = &mshc_0;
> > +		mmc2 = &sdhci_2;
> 
> This is also correct.
> 
> > +	};
> 
> For all other cases, where schematics are missing, just make them linear.

Alright, will do in next version, thanks for the feedback!

> Krzysztof

Best regards,
Henrik Grimler

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