linux-kernel - Re: [PATCH V2 1/3] dt-bindings: mmc: tegra: Add pinctrl for pad drive strength config

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Message-ID: <20181227213353.GA8110@bogus>
Date:   Thu, 27 Dec 2018 15:33:53 -0600
From:   Rob Herring <robh@...nel.org>
To:     Sowjanya Komatineni <skomatineni@...dia.com>
Cc:     mark.rutland@....com, mperttunen@...dia.com,
        thierry.reding@...il.com, jonathanh@...dia.com,
        adrian.hunter@...el.com, ulf.hansson@...aro.org,
        pchandru@...dia.com, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mmc@...r.kernel.org
Subject: Re: [PATCH V2 1/3] dt-bindings: mmc: tegra: Add pinctrl for pad
 drive strength config

On Wed, Dec 19, 2018 at 02:55:51PM -0800, Sowjanya Komatineni wrote:
> Add pinctrl for 3V3 and 1V8 pad drive strength configuration for
> Tegra210 sdmmc which has pad configuration registers in the pinmux
> reigster domain.

typo

> 
> Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com>
> ---
>  Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt b/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
> index 32b4b4e41923..2cecdc71d94c 100644
> --- a/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
> +++ b/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
> @@ -39,12 +39,16 @@ sdhci@...00200 {
>  	bus-width = <8>;
>  };
>  
> -Optional properties for Tegra210 and Tegra186:
> +Optional properties for Tegra210, Tegra186 and Tegra194:

Adding Tegra194, but this patch concerns Tegra210...

>  - pinctrl-names, pinctrl-0, pinctrl-1 : Specify pad voltage
>    configurations. Valid pinctrl-names are "sdmmc-3v3" and "sdmmc-1v8"
>    for controllers supporting multiple voltage levels. The order of names
>    should correspond to the pin configuration states in pinctrl-0 and
>    pinctrl-1.
> +- pinctrl-names : "sdmmc-3v3-drv" and "sdmmc-1v8-drv" are applicable for

These are in addition to the previous values?

> +  Tegra210 where pad config registers are in the pinmux register domain
> +  for pull-up-strength and pull-down-strength values configuration when
> +  using pads at 3V3 and 1V8 levels.
>  - nvidia,only-1-8-v : The presence of this property indicates that the
>    controller operates at a 1.8 V fixed I/O voltage.
>  - nvidia,pad-autocal-pull-up-offset-3v3,
> -- 
> 2.7.4
>