Hi Sakari,
On Wednesday 23 May 2012 14:19:51 Sakari Ailus wrote:
> On Wed, May 23, 2012 at 01:00:08PM +0200, Laurent Pinchart wrote:
> > On Wednesday 16 May 2012 06:12:49 Sakari Ailus wrote:
> > > The chip is typically powered constantly and no board uses the
> > > set_power() callback. Remove it.
> > >
> > > Signed-off-by: Sakari Ailus <sakari.ai...@iki.fi>
> > > ---
> > >
> > > drivers/media/video/as3645a.c | 39
> > > +++++++++----------------------------
> > > include/media/as3645a.h | 1 -
> > > 2 files changed, 9 insertions(+), 31 deletions(-)
> > >
> > > diff --git a/drivers/media/video/as3645a.c
> > > b/drivers/media/video/as3645a.c
> > > index c4b0357..7454660 100644
> > > --- a/drivers/media/video/as3645a.c
> > > +++ b/drivers/media/video/as3645a.c
> > > @@ -512,31 +512,6 @@ static int as3645a_setup(struct as3645a *flash)
> > >
> > > return ret & ~AS_FAULT_INFO_LED_AMOUNT ? -EIO : 0;
> > >
> > > }
> > >
> > > -static int __as3645a_set_power(struct as3645a *flash, int on)
> > > -{
> > > - int ret;
> > > -
> > > - if (!on)
> > > - as3645a_set_control(flash, AS_MODE_EXT_TORCH, false);
> > > -
> > > - if (flash->pdata->set_power) {
> > > - ret = flash->pdata->set_power(&flash->subdev, on);
> > > - if (ret < 0)
> > > - return ret;
> > > - }
> > > -
> > > - if (!on)
> > > - return 0;
> > > -
> > > - ret = as3645a_setup(flash);
> > > - if (ret < 0) {
> > > - if (flash->pdata->set_power)
> > > - flash->pdata->set_power(&flash->subdev, 0);
> > > - }
> > > -
> > > - return ret;
> > > -}
> > > -
> > >
> > > static int as3645a_set_power(struct v4l2_subdev *sd, int on)
> > > {
> > >
> > > struct as3645a *flash = to_as3645a(sd);
> > >
> > > @@ -545,9 +520,13 @@ static int as3645a_set_power(struct v4l2_subdev
> > > *sd,
> > > int on) mutex_lock(&flash->power_lock);
> > >
> > > if (flash->power_count == !on) {
> > >
> > > - ret = __as3645a_set_power(flash, !!on);
> > > - if (ret < 0)
> > > - goto done;
> > > + if (!on) {
> > > + as3645a_set_control(flash, AS_MODE_EXT_TORCH, false);
> > > + } else {
> > > + ret = as3645a_setup(flash);
> > > + if (ret < 0)
> > > + goto done;
> > > + }
> > >
> > > }
> >
> > If the chip is powered on constantly, why do we need a .s_power() subdev
> > operation at all ?
>
> I don't know why was it there in the first place. Probably to make it easier
> to use the driver on boards that required e.g. a regulator for the chip.
>
> But typically they're connected to battery directly. The idle power
> consumption is just some tens of µA.
What about on the N9 ?
--
Regards,
Laurent Pinchart
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