linux-kernel - Re: [RFC PATCH v3.1 08/27] mmc: sdhci: add a kernel configuration for enabling UHS-II support

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Message-ID: <20201130051752.GA48535@laputa>
Date:   Mon, 30 Nov 2020 14:17:52 +0900
From:   AKASHI Takahiro <takahiro.akashi@...aro.org>
To:     Adrian Hunter <adrian.hunter@...el.com>
Cc:     ulf.hansson@...aro.org, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org, ben.chuang@...esyslogic.com.tw,
        greg.tu@...esyslogic.com.tw
Subject: Re: [RFC PATCH v3.1 08/27] mmc: sdhci: add a kernel configuration
 for enabling UHS-II support

On Thu, Nov 26, 2020 at 10:14:36AM +0200, Adrian Hunter wrote:
> On 6/11/20 4:27 am, AKASHI Takahiro wrote:
> > This kernel configuration, CONFIG_MMC_SDHCI_UHS2, will be used
> > in the following commits to indicate UHS-II specific code in sdhci
> > controllers.
> 
> This patch needs to be combined with a patch that actually uses the config.

Earlier is better. So the patch #10/27 would be the best.

-Takahiro Akashi

> > 
> > Signed-off-by: Ben Chuang <ben.chuang@...esyslogic.com.tw>
> > Signed-off-by: AKASHI Takahiro <takahiro.akashi@...aro.org>
> > ---
> >  drivers/mmc/host/Kconfig | 9 +++++++++
> >  1 file changed, 9 insertions(+)
> > 
> > diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
> > index 31481c9fcc2e..5ca9ac03db40 100644
> > --- a/drivers/mmc/host/Kconfig
> > +++ b/drivers/mmc/host/Kconfig
> > @@ -89,6 +89,15 @@ config MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER
> >  
> >  	  This is the case for the Nintendo Wii SDHCI.
> >  
> > +config MMC_SDHCI_UHS2
> > +	tristate "UHS2 support on SDHCI controller"
> > +	depends on MMC_SDHCI
> > +	help
> > +	  This option is selected by SDHCI controller drivers that want to
> > +	  support UHS2-capable devices.
> > +
> > +	  If you have a controller with this feature, say Y or M here.
> > +
> >  config MMC_SDHCI_PCI
> >  	tristate "SDHCI support on PCI bus"
> >  	depends on MMC_SDHCI && PCI
> > 
>