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    SubjectRe: [PATCH 1/2] pwm: Add stubs for pwm operations
      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@codeaurora.org>
    > ---
    > 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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