| Message ID | 1566457123-20791-9-git-send-email-sam.shih@mediatek.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add mt7629 and fix mt7628 pwm | expand |
On Thu, 2019-08-22 at 14:58 +0800, Sam Shih wrote: > This updates bindings for MT7628 pwm controller. > > Signed-off-by: Sam Shih <sam.shih@mediatek.com> > --- > Documentation/devicetree/bindings/pwm/pwm-mediatek.txt | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt > index ea95b490a913..93980e3da261 100644 > --- a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt > +++ b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt > @@ -21,6 +21,10 @@ Required properties: > See pinctrl/pinctrl-bindings.txt for details of the property values. > - num-pwms: the number of PWM channels. > + > + Optional properties: > + - clock-frequency: fix clock frequency, this is only used in MT7628 SoC > + for period calculation. This SoC has no complex clock tree. I'm sorry if this has been discussed before. Would it be simpler if you just provide a fixed-clock as clock in device tree? This way you don't need this optional properties and don't need to special handle it in driver code. After all, the hw is still connected to a simple clock tree. Joe.C
On Thu, Aug 22, 2019 at 04:12:20PM +0800, Yingjoe Chen wrote: > On Thu, 2019-08-22 at 14:58 +0800, Sam Shih wrote: > > This updates bindings for MT7628 pwm controller. > > > > Signed-off-by: Sam Shih <sam.shih@mediatek.com> > > --- > > Documentation/devicetree/bindings/pwm/pwm-mediatek.txt | 4 ++++ > > 1 file changed, 4 insertions(+) > > > > diff --git a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt > > index ea95b490a913..93980e3da261 100644 > > --- a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt > > +++ b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt > > @@ -21,6 +21,10 @@ Required properties: > > See pinctrl/pinctrl-bindings.txt for details of the property values. > > - num-pwms: the number of PWM channels. > > + > > + Optional properties: > > + - clock-frequency: fix clock frequency, this is only used in MT7628 SoC > > + for period calculation. This SoC has no complex clock tree. > > I'm sorry if this has been discussed before. > > Would it be simpler if you just provide a fixed-clock as clock in device > tree? This way you don't need this optional properties and don't need to > special handle it in driver code. > > After all, the hw is still connected to a simple clock tree. This is what I just wrote in reply to patch 3 (which implements handling the clock-frequency property) even before reading your feedback. So I fully agree. Best regards Uwe
diff --git a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt index ea95b490a913..93980e3da261 100644 --- a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt +++ b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt @@ -21,6 +21,10 @@ Required properties: See pinctrl/pinctrl-bindings.txt for details of the property values. - num-pwms: the number of PWM channels. + + Optional properties: + - clock-frequency: fix clock frequency, this is only used in MT7628 SoC + for period calculation. This SoC has no complex clock tree. Example: pwm0: pwm@11006000 { compatible = "mediatek,mt7623-pwm";
This updates bindings for MT7628 pwm controller. Signed-off-by: Sam Shih <sam.shih@mediatek.com> --- Documentation/devicetree/bindings/pwm/pwm-mediatek.txt | 4 ++++ 1 file changed, 4 insertions(+)