Re: [PATCH 1/2] pwm: Add stubs for pwm operations

[Mohan Pallaka]

 Ping.

Hi Russell, please take sometime to review this patch.

Thanks, Mohan.

On 5/21/2011 8:00 PM, Mohan Pallaka wrote:
>  On 5/20/2011 10:29 AM, Mohan Pallaka wrote:
> > Chip drivers that support both pwm and non-pwm modes
> > would encounter compilation errors if the platform doesn't
> > have support for pwm, even though the chip is programmed
> > to work in non-pwm mode. Add stubs for pwm functions to
> > avoid compilation errors in these scenarios.
> >
> > Signed-off-by: Mohan Pallaka<mpallaka@xxxxxxxxxxxxxx>
> > ---
> >   include/linux/pwm.h |   23 +++++++++++++++++++++++
> >   1 files changed, 23 insertions(+), 0 deletions(-)
> >
> > diff --git a/include/linux/pwm.h b/include/linux/pwm.h
> > index 7c77575..54877f6 100644
> > --- a/include/linux/pwm.h
> > +++ b/include/linux/pwm.h
> > @@ -3,6 +3,7 @@
> >
> >   struct pwm_device;
> >
> > +#if defined(CONFIG_HAVE_PWM)
> >   /*
> >    * pwm_request - request a PWM device
> >    */
> > @@ -28,4 +29,26 @@ int pwm_enable(struct pwm_device *pwm);
> >    */
> >   void pwm_disable(struct pwm_device *pwm);
> >
> > +#else
> > +
> > +struct pwm_device *pwm_request(int pwm_id, const char *label)
> > +{
> > +    return NULL;
> > +}
> > +
> > +void pwm_free(struct pwm_device *pwm) { }
> > +
> > +int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)
> > +{
> > +    return -EINVAL;
> > +}
> > +
> > +int pwm_enable(struct pwm_device *pwm)
> > +{
> > +    return -EINVAL;
> > +}
> > +
> > +void pwm_disable(struct pwm_device *pwm) { }
> > +
> > +#endif /* CONFIG_HAVE_PWM */
> >   #endif /* __LINUX_PWM_H */
> > --
> > Sent by a consultant of the Qualcomm Innovation Center, Inc.
> > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora 
> > Forum.
> Hi Russell, please review this patch.
>
> --Mohan
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