[PATCH v2 4/8] mmc: sdhci: do not enable card detect interrupt for gpio cd type

[b29396@freescale.com (Dong Aisheng)]

On Tue, Sep 23, 2014 at 09:27:49AM +0200, Ulf Hansson wrote:
> On 22 September 2014 11:12, Dong Aisheng <b29396@freescale.com> wrote:
> > Except SDHCI_QUIRK_BROKEN_CARD_DETECTION and MMC_CAP_NONREMOVABLE,
> > we also do not need to handle controller native card detect interrupt
> > for gpio as card detect case.
> > If we wrong enabled the card detect interrupt for gpio case,
> > it will cause a lot of unexpected card detect interrupts during data transfer
> > which should not happen.
> >
> > Signed-off-by: Dong Aisheng <b29396@freescale.com>
> > ---
> >  drivers/mmc/host/sdhci.c |    3 ++-
> >  1 files changed, 2 insertions(+), 1 deletions(-)
> >
> > diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> > index 7481bd8..85cbf45 100644
> > --- a/drivers/mmc/host/sdhci.c
> > +++ b/drivers/mmc/host/sdhci.c
> > @@ -136,9 +136,10 @@ static void sdhci_dumpregs(struct sdhci_host *host)
> >  static void sdhci_set_card_detection(struct sdhci_host *host, bool enable)
> >  {
> >         u32 present;
> > +       int gpio_cd = mmc_gpio_get_cd(host->mmc);
> >
> >         if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) ||
> > -           (host->mmc->caps & MMC_CAP_NONREMOVABLE))
> > +           (host->mmc->caps & MMC_CAP_NONREMOVABLE) || !IS_ERR_VALUE(gpio_cd))
> 
> If you have a properly working gpio_cd, then why does you also have
> SDHCI_QUIRK_BROKEN_CARD_DETECTION set? Isn't that the actual problem?
> 

SDHCI_QUIRK_BROKEN_CARD_DETECTION seems only for controller CD function.
Thus even we're using gpio_cd, we still have this quirk set for controller
to avoid enable controller cd interrupts.
Does it make sense?

Regards
Dong Aisheng

> Kind regards
> Uffe
> 
> >                 return;
> >
> >         if (enable) {
> > --
> > 1.7.8
> >