Hello Baolin, On Wed, Aug 14, 2019 at 09:51:34AM +0800, Baolin Wang wrote: > On Tue, 13 Aug 2019 at 22:13, Uwe Kleine-König > <u.kleine-koe...@pengutronix.de> wrote: > > On Tue, Aug 13, 2019 at 09:46:40PM +0800, Baolin Wang wrote: > > > +- assigned-clock-parents: The phandle of the parent clock of PWM clock. > > > > I'm not sure you need to point out assigned-clocks and > > assigned-clock-parents as this is general clk stuff. Also I wonder if > > these should be "required properties". > > I think I should describe any properties used by PWM node, like > 'clocks' and 'clock-names' properties, though they are common clock > properties.
Then you might want to describe also "status", "assigned-clock-rates", "pinctrl-$n", "pinctrl-names", "power-domains", "power-domain-names" and probably another dozen I'm not aware of. > Yes, they are required. Thanks for your comments. required in which sense? Why can a Spreadtrum PWM not work when the clock parents are unspecified? Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | http://www.pengutronix.de/ |