[U-Boot] [PATCH v3 1/2] mmc: Board-specific MMC power initializations

[Paul Kocialkowski]

Hi Igor,

> On 11/01/14 12:52, 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 at paulk.fr>
> > ---
> >  drivers/mmc/mmc.c | 8 ++++++++
> >  include/mmc.h     | 1 +
> >  2 files changed, 9 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;
> > +}
> > +
> >  int mmc_start_init(struct mmc *mmc)
> >  {
> >  	int err;
> > @@ -1293,6 +1299,8 @@ int mmc_start_init(struct mmc *mmc)
> >  	if (mmc->has_init)
> >  		return 0;
> >  
> > +	board_mmc_power_init();
> > +
> 
> Shouldn't we have some error handling here?

I noticed how weak implementations tend to return -1 and not have their
return code checked so much (see the other two such functions in mmc.c).
I would be fine with checking the return code and returning 0 in the
weak implementation.

If you think that's better, I'll make a new version with that.

> >  	/* made sure it's not NULL earlier */
> >  	err = mmc->cfg->ops->init(mmc);
> >  
> > diff --git a/include/mmc.h b/include/mmc.h
> > index d74a190..aaea644 100644
> > --- a/include/mmc.h
> > +++ b/include/mmc.h
> > @@ -385,6 +385,7 @@ struct mmc *mmc_spi_init(uint bus, uint cs, uint speed, uint mode);
> >  int mmc_legacy_init(int verbose);
> >  #endif
> >  
> > +int board_mmc_power_init(void);
> >  int board_mmc_init(bd_t *bis);
> >  int cpu_mmc_init(bd_t *bis);
> >  int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr);
> > 
> 

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