| Message ID | 1630924867-4663-4-git-send-email-skakit@codeaurora.org |
|---|---|
| State | New |
| Headers | show |
| Series | Add PM8350C PMIC PWM support for backlight | expand |
On Mon, Sep 06, 2021 at 04:11:07PM +0530, satya priya wrote: > Add pwm support for PM8350C pmic. > > Signed-off-by: satya priya <skakit@codeaurora.org> > --- > arch/arm64/boot/dts/qcom/pm8350c.dtsi | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/arch/arm64/boot/dts/qcom/pm8350c.dtsi b/arch/arm64/boot/dts/qcom/pm8350c.dtsi > index e1b75ae..ecdae55 100644 > --- a/arch/arm64/boot/dts/qcom/pm8350c.dtsi > +++ b/arch/arm64/boot/dts/qcom/pm8350c.dtsi > @@ -29,6 +29,12 @@ > interrupt-controller; > #interrupt-cells = <2>; > }; > + > + pm8350c_pwm4: pwm { What does the '4' represent, an internal channel number? It should probably be omitted if the PM8350 only has a single output PWM port. > + compatible = "qcom,pm8350c-pwm"; > + #pwm-cells = <2>; > + status = "okay"; I don't think it should be enabled by default, there may be boards with the PM8350C that don't use the PWM.
Quoting satya priya (2021-09-06 03:41:07) > Add pwm support for PM8350C pmic. > > Signed-off-by: satya priya <skakit@codeaurora.org> > --- > arch/arm64/boot/dts/qcom/pm8350c.dtsi | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/arch/arm64/boot/dts/qcom/pm8350c.dtsi b/arch/arm64/boot/dts/qcom/pm8350c.dtsi > index e1b75ae..ecdae55 100644 > --- a/arch/arm64/boot/dts/qcom/pm8350c.dtsi > +++ b/arch/arm64/boot/dts/qcom/pm8350c.dtsi > @@ -29,6 +29,12 @@ > interrupt-controller; > #interrupt-cells = <2>; > }; > + > + pm8350c_pwm4: pwm { > + compatible = "qcom,pm8350c-pwm"; Shouldn't there be a reg property? > + #pwm-cells = <2>; > + status = "okay"; > + }; > }; > }; > > -- > QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member > of Code Aurora Forum, hosted by The Linux Foundation >
On 2021-09-08 09:04, Stephen Boyd wrote: > Quoting satya priya (2021-09-06 03:41:07) >> Add pwm support for PM8350C pmic. >> >> Signed-off-by: satya priya <skakit@codeaurora.org> >> --- >> arch/arm64/boot/dts/qcom/pm8350c.dtsi | 6 ++++++ >> 1 file changed, 6 insertions(+) >> >> diff --git a/arch/arm64/boot/dts/qcom/pm8350c.dtsi >> b/arch/arm64/boot/dts/qcom/pm8350c.dtsi >> index e1b75ae..ecdae55 100644 >> --- a/arch/arm64/boot/dts/qcom/pm8350c.dtsi >> +++ b/arch/arm64/boot/dts/qcom/pm8350c.dtsi >> @@ -29,6 +29,12 @@ >> interrupt-controller; >> #interrupt-cells = <2>; >> }; >> + >> + pm8350c_pwm4: pwm { >> + compatible = "qcom,pm8350c-pwm"; > > Shouldn't there be a reg property? > The bindings do not specify reg property. I think it is because we are adding the base address in struct "pm8350c_pwm_data". >> + #pwm-cells = <2>; >> + status = "okay"; >> + }; >> }; >> }; >> >> -- >> QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a >> member >> of Code Aurora Forum, hosted by The Linux Foundation >>
On Wed, Sep 08, 2021 at 02:37:39PM +0530, skakit@codeaurora.org wrote: > On 2021-09-07 23:46, Matthias Kaehlcke wrote: > > On Mon, Sep 06, 2021 at 04:11:07PM +0530, satya priya wrote: > > > Add pwm support for PM8350C pmic. > > > > > > Signed-off-by: satya priya <skakit@codeaurora.org> > > > --- > > > arch/arm64/boot/dts/qcom/pm8350c.dtsi | 6 ++++++ > > > 1 file changed, 6 insertions(+) > > > > > > diff --git a/arch/arm64/boot/dts/qcom/pm8350c.dtsi > > > b/arch/arm64/boot/dts/qcom/pm8350c.dtsi > > > index e1b75ae..ecdae55 100644 > > > --- a/arch/arm64/boot/dts/qcom/pm8350c.dtsi > > > +++ b/arch/arm64/boot/dts/qcom/pm8350c.dtsi > > > @@ -29,6 +29,12 @@ > > > interrupt-controller; > > > #interrupt-cells = <2>; > > > }; > > > + > > > + pm8350c_pwm4: pwm { > > > > What does the '4' represent, an internal channel number? It should > > probably be omitted if the PM8350 only has a single output PWM > > port. > > > > pm8350c has four PWMs, but I think we can drop the '4' here. Why is only one PWM exposed if the PMIC has for of them? Why number 4 and not one of the others?
On Wed 08 Sep 08:29 PDT 2021, Matthias Kaehlcke wrote: > On Wed, Sep 08, 2021 at 02:37:39PM +0530, skakit@codeaurora.org wrote: > > On 2021-09-07 23:46, Matthias Kaehlcke wrote: > > > On Mon, Sep 06, 2021 at 04:11:07PM +0530, satya priya wrote: > > > > Add pwm support for PM8350C pmic. > > > > > > > > Signed-off-by: satya priya <skakit@codeaurora.org> > > > > --- > > > > arch/arm64/boot/dts/qcom/pm8350c.dtsi | 6 ++++++ > > > > 1 file changed, 6 insertions(+) > > > > > > > > diff --git a/arch/arm64/boot/dts/qcom/pm8350c.dtsi > > > > b/arch/arm64/boot/dts/qcom/pm8350c.dtsi > > > > index e1b75ae..ecdae55 100644 > > > > --- a/arch/arm64/boot/dts/qcom/pm8350c.dtsi > > > > +++ b/arch/arm64/boot/dts/qcom/pm8350c.dtsi > > > > @@ -29,6 +29,12 @@ > > > > interrupt-controller; > > > > #interrupt-cells = <2>; > > > > }; > > > > + > > > > + pm8350c_pwm4: pwm { > > > > > > What does the '4' represent, an internal channel number? It should > > > probably be omitted if the PM8350 only has a single output PWM > > > port. > > > > > > > pm8350c has four PWMs, but I think we can drop the '4' here. > > Why is only one PWM exposed if the PMIC has for of them? Why number 4 > and not one of the others? The node should represent all 4 channels, which ones the board uses is captured in how they are bound to other clients - or defines as LEDs by additional child nodes. Regards, Bjorn
On 2021-09-08 22:38, Bjorn Andersson wrote: > On Wed 08 Sep 08:29 PDT 2021, Matthias Kaehlcke wrote: > >> On Wed, Sep 08, 2021 at 02:37:39PM +0530, skakit@codeaurora.org wrote: >> > On 2021-09-07 23:46, Matthias Kaehlcke wrote: >> > > On Mon, Sep 06, 2021 at 04:11:07PM +0530, satya priya wrote: >> > > > Add pwm support for PM8350C pmic. >> > > > >> > > > Signed-off-by: satya priya <skakit@codeaurora.org> >> > > > --- >> > > > arch/arm64/boot/dts/qcom/pm8350c.dtsi | 6 ++++++ >> > > > 1 file changed, 6 insertions(+) >> > > > >> > > > diff --git a/arch/arm64/boot/dts/qcom/pm8350c.dtsi >> > > > b/arch/arm64/boot/dts/qcom/pm8350c.dtsi >> > > > index e1b75ae..ecdae55 100644 >> > > > --- a/arch/arm64/boot/dts/qcom/pm8350c.dtsi >> > > > +++ b/arch/arm64/boot/dts/qcom/pm8350c.dtsi >> > > > @@ -29,6 +29,12 @@ >> > > > interrupt-controller; >> > > > #interrupt-cells = <2>; >> > > > }; >> > > > + >> > > > + pm8350c_pwm4: pwm { >> > > >> > > What does the '4' represent, an internal channel number? It should >> > > probably be omitted if the PM8350 only has a single output PWM >> > > port. >> > > >> > >> > pm8350c has four PWMs, but I think we can drop the '4' here. >> >> Why is only one PWM exposed if the PMIC has for of them? Why number 4 >> and not one of the others? > pwm4 is used for backlight support on kodiak crd board, so I mentioned 4, thinking 4 nodes should be present for 4 pwms. but I see that we need to represent all the four channels as one node. will drop the '4' in next version. Thanks, Satya Priya > The node should represent all 4 channels, which ones the board uses is > captured in how they are bound to other clients - or defines as LEDs by > additional child nodes. > > Regards, > Bjorn
diff --git a/arch/arm64/boot/dts/qcom/pm8350c.dtsi b/arch/arm64/boot/dts/qcom/pm8350c.dtsi index e1b75ae..ecdae55 100644 --- a/arch/arm64/boot/dts/qcom/pm8350c.dtsi +++ b/arch/arm64/boot/dts/qcom/pm8350c.dtsi @@ -29,6 +29,12 @@ interrupt-controller; #interrupt-cells = <2>; }; + + pm8350c_pwm4: pwm { + compatible = "qcom,pm8350c-pwm"; + #pwm-cells = <2>; + status = "okay"; + }; }; };
Add pwm support for PM8350C pmic. Signed-off-by: satya priya <skakit@codeaurora.org> --- arch/arm64/boot/dts/qcom/pm8350c.dtsi | 6 ++++++ 1 file changed, 6 insertions(+)