linux-kernel - Re: [PATCH v4 1/2] ARM: dts: exynos: replace mshc0 alias with mmc-ddr-1

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Message-ID: <b9d3a220-e7a1-73d0-56bf-af1291cd58ee@samsung.com>
Date:   Thu, 16 Mar 2023 11:32:01 +0100
From:   Marek Szyprowski <m.szyprowski@...sung.com>
To:     Henrik Grimler <henrik@...mler.se>, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, alim.akhtar@...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
Subject: Re: [PATCH v4 1/2] ARM: dts: exynos: replace mshc0 alias with
 mmc-ddr-1_8v property

Hi Henrik

On 15.03.2023 22:26, Henrik Grimler wrote:
> Previously, the mshc0 alias has been necessary so that
> MMC_CAP_1_8V_DDR | MMC_CAP_8_BIT_DATA are set for mshc_0/mmc_0.
> However, these capabilities should be described in the device tree so
> that we do not have to rely on the alias.
>
> The property mmc-ddr-1_8v replaces MMC_CAP_1_8V_DDR, while bus_width =
> <8>, which is already set for all the mshc0/mmc0 nodes, replaces
> MMC_CAP_8_BIT_DATA.
>
> Also drop other mshc aliases as they are not needed.
>
> Signed-off-by: Henrik Grimler <henrik@...mler.se>
> ---
>
> Changes since v3:
> * Drop attempt at node sorting/cleaning
> * Move two mmc alias additions to the other patch
> * Update commit message
>
> Changes since v2:
> * Set mmc-ddr-1_8v in device trees for mshc_0/mmc_0
>
>   arch/arm/boot/dts/exynos3250-artik5.dtsi            | 1 +
>   arch/arm/boot/dts/exynos3250-monk.dts               | 1 +
>   arch/arm/boot/dts/exynos3250-rinato.dts             | 1 +
>   arch/arm/boot/dts/exynos4210-i9100.dts              | 1 +
>   arch/arm/boot/dts/exynos4210-origen.dts             | 1 +
>   arch/arm/boot/dts/exynos4210-trats.dts              | 1 +
>   arch/arm/boot/dts/exynos4210-universal_c210.dts     | 1 +
>   arch/arm/boot/dts/exynos4412-itop-scp-core.dtsi     | 1 +
>   arch/arm/boot/dts/exynos4412-midas.dtsi             | 1 +
>   arch/arm/boot/dts/exynos4412-odroid-common.dtsi     | 1 +
>   arch/arm/boot/dts/exynos4412-origen.dts             | 1 +
>   arch/arm/boot/dts/exynos4412-p4note.dtsi            | 1 +
>   arch/arm/boot/dts/exynos4412.dtsi                   | 1 -
>   arch/arm/boot/dts/exynos5250-arndale.dts            | 1 +
>   arch/arm/boot/dts/exynos5250-smdk5250.dts           | 1 +
>   arch/arm/boot/dts/exynos5250-snow-common.dtsi       | 1 +
>   arch/arm/boot/dts/exynos5250-spring.dts             | 1 +
>   arch/arm/boot/dts/exynos5250.dtsi                   | 4 ----
>   arch/arm/boot/dts/exynos5260-xyref5260.dts          | 1 +
>   arch/arm/boot/dts/exynos5410-odroidxu.dts           | 1 +
>   arch/arm/boot/dts/exynos5410-smdk5410.dts           | 1 +
>   arch/arm/boot/dts/exynos5420-arndale-octa.dts       | 1 +
>   arch/arm/boot/dts/exynos5420-galaxy-tab-common.dtsi | 1 +
>   arch/arm/boot/dts/exynos5420-peach-pit.dts          | 1 +
>   arch/arm/boot/dts/exynos5420-smdk5420.dts           | 1 +
>   arch/arm/boot/dts/exynos5420.dtsi                   | 3 ---
>   arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi  | 1 +
>   arch/arm/boot/dts/exynos5422-samsung-k3g.dts        | 1 +
>   arch/arm/boot/dts/exynos5800-peach-pi.dts           | 1 +
>   29 files changed, 26 insertions(+), 8 deletions(-)
>

> ...

> diff --git a/arch/arm/boot/dts/exynos4210-i9100.dts b/arch/arm/boot/dts/exynos4210-i9100.dts
> index bba85011ecc9..a370a5fa20d8 100644
> --- a/arch/arm/boot/dts/exynos4210-i9100.dts
> +++ b/arch/arm/boot/dts/exynos4210-i9100.dts
> @@ -776,6 +776,7 @@ &sdhci_0 {
>   	status = "okay";
>   
>   	bus-width = <8>;
> +	mmc-ddr-1_8v;
>   	non-removable;
>   	vmmc-supply = <&vemmc_reg>;
>   
> diff --git a/arch/arm/boot/dts/exynos4210-origen.dts b/arch/arm/boot/dts/exynos4210-origen.dts
> index 1103e7f92b57..d8dd13ce29e1 100644
> --- a/arch/arm/boot/dts/exynos4210-origen.dts
> +++ b/arch/arm/boot/dts/exynos4210-origen.dts
> @@ -326,6 +326,7 @@ max8997_irq: max8997-irq-pins {
>   
>   &sdhci_0 {
>   	bus-width = <4>;
> +	mmc-ddr-1_8v;
>   	pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus4 &sd0_cd>;
>   	pinctrl-names = "default";
>   	vmmc-supply = <&mmc_reg>;
> diff --git a/arch/arm/boot/dts/exynos4210-trats.dts b/arch/arm/boot/dts/exynos4210-trats.dts
> index b8e9dd23fc51..d757228a5676 100644
> --- a/arch/arm/boot/dts/exynos4210-trats.dts
> +++ b/arch/arm/boot/dts/exynos4210-trats.dts
> @@ -491,6 +491,7 @@ &rtc {
>   
>   &sdhci_0 {
>   	bus-width = <8>;
> +	mmc-ddr-1_8v;
>   	non-removable;
>   	pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus8>;
>   	pinctrl-names = "default";
> diff --git a/arch/arm/boot/dts/exynos4210-universal_c210.dts b/arch/arm/boot/dts/exynos4210-universal_c210.dts
> index 140abfb38e1d..57dbed908131 100644
> --- a/arch/arm/boot/dts/exynos4210-universal_c210.dts
> +++ b/arch/arm/boot/dts/exynos4210-universal_c210.dts
> @@ -584,6 +584,7 @@ &rtc {
>   
>   &sdhci_0 {
>   	bus-width = <8>;
> +	mmc-ddr-1_8v;
>   	non-removable;
>   	pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus8>;
>   	pinctrl-names = "default";

SDHCI is a different MMC controller than MSHC (DW-MMC), so please drop 
the above changes as they break SDHCI based MMC device operation (tested 
on Exynos4210 based Trats). With that fixed, feel free to add:

Tested-by: Marek Szyprowski <m.szyprowski@...sung.com>


Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland