Hi Uwe, On Tue, 13 Aug 2019 at 22:13, Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx> wrote: > > On Tue, Aug 13, 2019 at 09:46:40PM +0800, Baolin Wang wrote: > > Add Spreadtrum PWM controller documentation. > > > > Signed-off-by: Baolin Wang <baolin.wang@xxxxxxxxxx> > > --- > > Changes from v1: > > - Use assigned-clock-parents and assigned-clocks to set PWM clock parent. > > --- > > Documentation/devicetree/bindings/pwm/pwm-sprd.txt | 38 ++++++++++++++++++++ > > 1 file changed, 38 insertions(+) > > create mode 100644 Documentation/devicetree/bindings/pwm/pwm-sprd.txt > > > > diff --git a/Documentation/devicetree/bindings/pwm/pwm-sprd.txt b/Documentation/devicetree/bindings/pwm/pwm-sprd.txt > > new file mode 100644 > > index 0000000..e6cf312 > > --- /dev/null > > +++ b/Documentation/devicetree/bindings/pwm/pwm-sprd.txt > > @@ -0,0 +1,38 @@ > > +Spreadtrum PWM controller > > + > > +Spreadtrum SoCs PWM controller provides 4 PWM channels. > > + > > +Required porperties: > > s/porperties/properties/ Sorry for typos, will fix in next version. > > > +- compatible : Should be "sprd,ums512-pwm". > > +- reg: Physical base address and length of the controller's registers. > > +- clocks: The phandle and specifier referencing the controller's clocks. > > +- clock-names: Should contain following entries: > > + "pwmn": used to derive the functional clock for PWM channel n (n range: 0 ~ 3). > > + "enablen": for PWM channel n enable clock (n range: 0 ~ 3). > > +- assigned-clocks: Reference to the PWM clock entroes. > > s/entroes/entries/ Sure. > > > +- 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. Yes, they are required. Thanks for your comments. -- Baolin Wang Best Regards
