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List:       linux-mmc
Subject:    Re: [PATCH] OMAP4: MMC: fix power and audio issue, decouple USBC1
From:       Tony Lindgren <tony () atomide ! com>
Date:       2011-09-28 18:06:52
Message-ID: 20110928180652.GY6324 () atomide ! com
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* T Krishnamoorthy, Balaji <balajitk@ti.com> [110928 05:00]:
> Hi Tony,
> 
> Can you queue this patch ?

Thanks, adding into fixes.

Tony
 
> On Fri, Sep 9, 2011 at 7:34 PM, T Krishnamoorthy, Balaji
> <balajitk@ti.com> wrote:
> > On Fri, Aug 12, 2011 at 8:43 PM, Buckley, Bryan <bryan.buckley@ti.com> wrote:
> >> On Fri, Jul 22, 2011 at 7:30 AM, Kishore Kadiyala
> >> <kishorek.kadiyala@gmail.com> wrote:
> >>>
> >>> On Fri, Jul 22, 2011 at 12:59 AM, Bryan Buckley <bryan.buckley@ti.com> wrote:
> >>> > Remove OMAP4_USBC1_ICUSB_PWRDNZ_MASK during enable/disable PWRDNZ mode for
> >>> > MMC1_PBIAS and associated extended-drain MMC1 I/O cell. This is in accordance
> >>> > with the control module programming guide. This fixes a bug where if trying to
> >>> > use gpio_98 or gpio_99 and MMC1 at the same time the GPIO signal will be
> >>> > affected by a changing SDMMC1_VDDS.
> >>> >
> >>> > Software must keep MMC1_PBIAS cell and MMC1_IO cell PWRDNZ signals low whenever
> >>> > SDMMC1_VDDS ramps up/down or changes for cell protection purposes.
> >>> >
> >>> > MMC1 is based on SDMMC1_VDDS whereas USBC1 is based on SIM_VDDS therefore
> >>> > they can operate independently.
> >>> >
> >>> > Signed-off-by: Bryan Buckley <bryan.buckley@ti.com>
> >>>
> >>> Good catch,
> >>>
> >>> Acked-by:  Kishore Kadiyala <kishore.kadiyala@ti.com>
> >>>
> >>
> >> Any other comments from anyone else?  Noticed that this commit isn't
> >> in any upstream branches. This patch will fix issues with people who
> >> want to use GPIO 98/99 AND MMC1 at the same time.  Would be good to
> >> have this fix upstream.
> >>
> > FWIW: Tested on OMAP4 Blaze
> > Tested-by: Balaji T K <balajitk@ti.com>
> >
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