On Sat, Nov 22, 2014 at 07:23:30AM +0530, naidu.tellapati@xxxxxxxxx wrote: > From: Naidu Tellapati <Naidu.Tellapati@xxxxxxxxxx> > > Add binding document for IMG Pulse Width Modulator (PWM) DAC present on the > Pistachio SOC. The PWM DAC has four channels. > > Signed-off-by: Naidu Tellapati <Naidu.Tellapati@xxxxxxxxxx> > Signed-off-by: Sai Masarapu <Sai.Masarapu@xxxxxxxxxx> > Reviewed-by: Andrew Bresticker <abrestic@xxxxxxxxxxxx> > --- > No changes from v3. > --- > Documentation/devicetree/bindings/pwm/img-pwm.txt | 23 +++++++++++++++++++++ > 1 files changed, 23 insertions(+), 0 deletions(-) > create mode 100644 Documentation/devicetree/bindings/pwm/img-pwm.txt > > diff --git a/Documentation/devicetree/bindings/pwm/img-pwm.txt b/Documentation/devicetree/bindings/pwm/img-pwm.txt > new file mode 100644 > index 0000000..d3828dd > --- /dev/null > +++ b/Documentation/devicetree/bindings/pwm/img-pwm.txt > @@ -0,0 +1,23 @@ > +*Imagination Technologies PWM DAC driver > + > +Required properties: > + - compatible: Should be "img,pistachio-pwm" > + - reg: Should contain physical base address and length of pwm registers. > + - clocks: Must contain an entry for each entry in clock-names. > + See ../clock/clock-bindings.txt for details. > + - clock-names: input clock names. > + Required elements: "pwm" and "sys". I think it'd be useful to explain at least what the "sys" clock is. "pwm" I'd assume that it clocks the IP block, but what does "sys" do? Thierry
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