Re: [PATCH 09/11] mmc: omap_hsmmc: enhance pinctrl support
From: Linus Walleij
Date: Tue Jun 04 2013 - 03:20:02 EST
On Tue, Jun 4, 2013 at 9:11 AM, Linus Walleij <linus.walleij@xxxxxxxxxx> wrote:
> On Fri, May 31, 2013 at 12:13 PM, Hebbar Gururaja
> <gururaja.hebbar@xxxxxx> wrote:
>> Amend the hsmmc controller to optionally take a pin control handle and
>> set the state of the pins to:
>> - "default" on boot, resume and before performing a mmc transfer
>> - "idle" after initial default, after resume default, and after each
>> mmc/sd card access
>> - "sleep" on suspend()
>> By optionally putting the pins into sleep state in the suspend callback
>> we can accomplish two things.
>> - One is to minimize current leakage from pins and thus save power,
>> - second, we can prevent the IP from driving pins output in an
>> uncontrolled manner, which may happen if the power domain drops the
>> domain regulator.
>> If any of the above pin states are missing in dt, a warning message
>> about the missing state is displayed.
>> If certain pin-states are not available, to remove this warning message
>> pass respective state name with null phandler.
>> Signed-off-by: Hebbar Gururaja <gururaja.hebbar@xxxxxx>
>> Cc: Balaji T K <balajitk@xxxxxx>
>> Cc: Chris Ball <cjb@xxxxxxxxxx>
>> Cc: linux-mmc@xxxxxxxxxxxxxxx
>> Cc: linux-omap@xxxxxxxxxxxxxxx
> This is perfectly correct.
> Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
So please consider my other option given in patch 2 instead.
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