linux-kernel - Re: [PATCH 3/3] arm64: dts: qcom: pm8350c: Add pwm support

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Message-ID: <b10e5f36fb0216a4c951d752f5103099@codeaurora.org>
Date:   Wed, 08 Sep 2021 14:37:39 +0530
From:   skakit@...eaurora.org
To:     Matthias Kaehlcke <mka@...omium.org>
Cc:     Pavel Machek <pavel@....cz>, Rob Herring <robh+dt@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        swboyd@...omium.org, kgunda@...eaurora.org,
        linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 3/3] arm64: dts: qcom: pm8350c: Add pwm support

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@...eaurora.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.

>> +			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.

Okay.