linux-kernel - Re: [PATCH 2/2] mmc: sdhci-pltfm: enable interrupt mode to detect card

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Date:	Thu, 14 May 2015 15:21:59 -0500
From:	Scott Wood <scottwood@...escale.com>
To:	Lu Yangbo-B47093 <yangbo.lu@...escale.com>
CC:	"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] mmc: sdhci-pltfm: enable interrupt mode to detect
 card

On Thu, 2015-05-14 at 01:29 -0500, Lu Yangbo-B47093 wrote:
> 
> 
> > -----Original Message-----
> > From: Wood Scott-B07421
> > Sent: Thursday, May 14, 2015 12:37 AM
> > To: Lu Yangbo-B47093
> > Cc: linuxppc-dev@...ts.ozlabs.org; linux-kernel@...r.kernel.org
> > Subject: Re: [PATCH 2/2] mmc: sdhci-pltfm: enable interrupt mode to
> > detect card
> > 
> > On Wed, 2015-05-13 at 16:20 +0800, Yangbo Lu wrote:
> > > Enable interrupt mode to detect card instead of polling mode for
> > > P1020/P4080/P5020/P5040/T1040 by removing the quirk
> > > SDHCI_QUIRK_BROKEN_CARD_DETECTION. This could improve data
> > > transferring performance and avoid the call trace caused by polling
> > > card status sometime.
> > >
> > > Signed-off-by: Yangbo Lu <yangbo.lu@...escale.com>
> > > ---
> > >  drivers/mmc/host/sdhci-pltfm.c | 7 +++++++
> > >  1 file changed, 7 insertions(+)
> > >
> > > diff --git a/drivers/mmc/host/sdhci-pltfm.c
> > > b/drivers/mmc/host/sdhci-pltfm.c index c5b01d6..62f4049 100644
> > > --- a/drivers/mmc/host/sdhci-pltfm.c
> > > +++ b/drivers/mmc/host/sdhci-pltfm.c
> > > @@ -102,6 +102,13 @@ void sdhci_get_of_property(struct platform_device
> > *pdev)
> > >  		    of_device_is_compatible(np, "fsl,mpc8536-esdhc"))
> > >  			host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
> > >
> > > +		if (of_device_is_compatible(np, "fsl,p5040-esdhc") ||
> > > +			of_device_is_compatible(np, "fsl,p5020-esdhc") ||
> > > +			of_device_is_compatible(np, "fsl,p4080-esdhc") ||
> > > +			of_device_is_compatible(np, "fsl,p1020-esdhc") ||
> > > +			of_device_is_compatible(np, "fsl,t1040-esdhc"))
> > > +			host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
> > 
> > Please don't line up continuation lines with the if-body.  All of the
> > "of_device_is_compatibles" should start in the same column.
> Ok, thanks.
> > 
> > Given that you need to modify the device tree for this, why not just use
> > SVR?
> The drivers/mmc/host/sdhci-pltfm.c is not only used by freescale platform. So we couldn’t to use SVR here.
> Thanks. 

I'm sure there'd be ways of rearranging it to make it work, but OK.

Please send these patches to the MMC list and maintainer (and CC me).  I
can ACK the first one or apply it separately.

-Scott


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