[U-Boot] [PATCH v2 1/2] mmc: Board-specific MMC power initializations

[Paul Kocialkowski <contact@paulk.fr>]

Hi there, thanks for the review,

Le mardi 04 novembre 2014 ? 13:32 -0500, Tom Rini a ?crit :
> On Tue, Nov 04, 2014 at 07:58:38PM +0200, Igor Grinberg wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> > 
> > Hi Tom,
> > 
> > On 11/04/14 17:56, Tom Rini wrote:
> > > On Sat, Nov 01, 2014 at 11:35:43AM +0100, Paul Kocialkowski wrote:
> > > 
> > >> Some devices may use non-standard combinations of regulators to power MMC:
> > >> this allows these devices to provide a board-specific MMC power init function
> > >> to set everything up in their own way.
> > >>
> > >> Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
> > >> ---
> > >>  drivers/mmc/mmc.c | 8 ++++++++
> > >>  include/mmc.h     | 2 ++
> > >>  2 files changed, 10 insertions(+)
> > >>
> > >> diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
> > >> index 44a4feb..125f347 100644
> > >> --- a/drivers/mmc/mmc.c
> > >> +++ b/drivers/mmc/mmc.c
> > >> @@ -1277,6 +1277,12 @@ block_dev_desc_t *mmc_get_dev(int dev)
> > >>  }
> > >>  #endif
> > >>  
> > >> +/* board-specific MMC power initializations. */
> > >> +__weak int board_mmc_power_init(void)
> > >> +{
> > >> +	return -1;
> > >> +}
> > > 
> > > Since we don't check error return here which I think is fine just make
> > > this a void?  Thanks!
> > 
> > There is v3 posted a while ago...
> > We have also agreed on v4..

Note that v3 and v4 are the same, except that v3 didn't apply on top of
master.

> Yeah, oops, didn't delete these after catch-up.  I'm still not sure we
> should continue adding more unchecked return values "just because".

I agree that we shouldn't have an unchecked return value. So we could
either check the return value and print a warning, without aborting the
init sequence (what Igor proposed initially) or just make this return
void (what you both seem to agree on).

I'm fine with both solutions. I guess that enabling a regulator could
fail (say, because of an i2c error), so there is still sense in
returning int.

Let me know of what your definitive answer on this is. I'll make a new
patchset probably this friday (I'm running on a very tight schedule
until then).

-- 
Paul Kocialkowski, Replicant developer

Replicant is a fully free Android distribution

Website: http://www.replicant.us/
Redmine: http://redmine.replicant.us/
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