linux-kernel - Re: [PATCH v4 22/22] arm64: dts: mt8192: Add pwm node

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Date:   Tue, 29 Mar 2022 12:03:46 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     "allen-kh.cheng" <allen-kh.cheng@...iatek.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Cc:     Project_Global_Chrome_Upstream_Group@...iatek.com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        Chen-Yu Tsai <wenst@...omium.org>,
        Ryder Lee <ryder.lee@...nel.org>,
        Hui Liu <hui.liu@...iatek.com>
Subject: Re: [PATCH v4 22/22] arm64: dts: mt8192: Add pwm node



On 29/03/2022 08:51, allen-kh.cheng wrote:
> 
> Hi Matthias,
> 
> On Mon, 2022-03-28 at 13:10 +0200, Matthias Brugger wrote:
>>
>> On 18/03/2022 15:45, Allen-KH Cheng wrote:
>>> Add pwm node for mt8192 SoC.
>>>
>>> Signed-off-by: Allen-KH Cheng <allen-kh.cheng@...iatek.com>
>>> ---
>>>    arch/arm64/boot/dts/mediatek/mt8192.dtsi | 11 +++++++++++
>>>    1 file changed, 11 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
>>> b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
>>> index f0f0f067c023..ea98b2230f18 100644
>>> --- a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
>>> +++ b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
>>> @@ -625,6 +625,17 @@
>>>    			status = "disabled";
>>>    		};
>>>    
>>> +		pwm0: pwm@...0e000 {
>>> +			compatible = "mediatek,mt8183-disp-pwm";
>>> +			reg = <0 0x1100e000 0 0x1000>;
>>> +			interrupts = <GIC_SPI 171 IRQ_TYPE_LEVEL_HIGH
>>> 0>;
>>
>> Binding description is missing interrupt property. Remeber that the
>> DT should
>> describe the HW, so we need to update the binding description.
>> I just wonder what the IRQ signals, as it is not used by the driver.
>> Definitely
>> a good candidate to make the commit message more sound. So please add
>> it there.
>>
>> Thanks!
>> Matthias
>>
> 
> For interrupt property, we will send anther patch to update binding
> and add some information for IRQ into commit message in next version.
> 

Thanks. Would you mind to send the dt-bindings updates in a series together with 
the patches from this series that needs changes? This way it will be easier to 
track the dependencies.

Please beware to send dt-binding patches as first of the series, so that Rob 
Herring can find the rather quick.

Thanks!
Matthias

> Thanks,
> Allen
> 
>>> +			#pwm-cells = <2>;
>>> +			clocks = <&topckgen CLK_TOP_DISP_PWM_SEL>,
>>> +				 <&infracfg CLK_INFRA_DISP_PWM>;
>>> +			clock-names = "main", "mm";
>>> +			status = "disabled";
>>> +		};
>>> +
>>>    		spi1: spi@...10000 {
>>>    			compatible = "mediatek,mt8192-spi",
>>>    				     "mediatek,mt6765-spi";
>