On Thu, Aug 22, 2013 at 10:25:30AM +0200, Tomasz Figa wrote: > On Thursday 22 of August 2013 02:55:42 Xiubo Li-B47053 wrote: > > Hi Tomasz, > > > > Thanks for your comments. > > > > > > +- #pwm-cells: Should be 3. Number of cells being used to specify > > > > PWM > > > > property. > > > > + First cell specifies the per-chip channel index of the PWM > > > > to use, the > > > > + second cell is the period in nanoseconds and bit 0 in > > > > the third cell is > > > > + used to encode the polarity of PWM output. Set bit > > > > 0 of the third in PWM > > > > + specifier to 1 for inverse polarity & set to 0 > > > > for normal polarity. > > > > > > If the meaning of flags cell is the same as in generic, default PWM > > > specifier format, then it should be noted here and generic PWM binding > > > documentation mentioned. > > > > OK, How about the following ? > > - #pwm-cells: Should be 3. See pwm.txt in this directory for a > > description of the cells format. > > I meant just the last cell, which stores flags, but actually this might be > a good idea, but with slightly extended description. Something among those > lines: > > - #pwm-cells: Should be 3. The default three cell format specified by > generic PWM bindings are used. Refer to the documentation of generic PWM > bindings for more information about the meaning of cells. Actually I prefer the second proposal, that is: > > - #pwm-cells: Should be 3. See pwm.txt in this directory for a > > description of the cells format. We agreed on that wording in another thread and I'd prefer to be consistent across bindings. Thierry
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