On Tue, Jul 24, 2012 at 07:35:32PM +0530, Philip, Avinash wrote: > Some hardware supports inverting the polarity of the PWM signal. This > commit adds support to the PWM framework to allow users of the PWM API > to configure the polarity. Note that in order to reduce complexity, > changing the polarity of a PWM signal is only allowed while the PWM is > disabled. > > A practical example where this can prove useful is to simulate inversion > of the duty cycle. While inversion of polarity and duty cycle are not > exactly the same, the differences for most use-cases are negligible. > > Signed-off-by: Philip, Avinash <avinashphi...@ti.com> > --- > changes in V2: > - Updates commit message > - Provides proper comments > - Removes usage of polarity variable. > - Removes encoding of polarity in flags > > Configuring polarity to be done with PWM device disabled, if not failure > reported. > > If PWM device is enabled while configuring polarity, disabling and > re_enabling make it complex. Whoever uses this API has to taken care of > the basic rules. > > Discussions related to this can found at > http://www.spinics.net/lists/kernel/msg1372110.html > > :100644 100644 ecb7690... f0a1db3... M drivers/pwm/core.c > :100644 100644 21d076c... 354764c... M include/linux/pwm.h > drivers/pwm/core.c | 22 ++++++++++++++++++++++ > include/linux/pwm.h | 23 +++++++++++++++++++++++ > 2 files changed, 45 insertions(+), 0 deletions(-)
Applied, thanks. Thierry
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