linux-kernel - Re: [PATCH] mips: dts: ingenic: x1000: Add PWM device tree node

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Date:   Tue, 12 Apr 2022 00:08:11 +0800
From:   Zhou Yanjie <zhouyanjie@...yeetech.com>
To:     Aidan MacDonald <aidanmacdonald.0x0@...il.com>
Cc:     devicetree@...r.kernel.org, krzk+dt@...nel.org,
        linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org,
        paul@...pouillou.net, robh+dt@...nel.org
Subject: Re: [PATCH] mips: dts: ingenic: x1000: Add PWM device tree node

Hi Aidan,

On 2022/4/11 下午11:47, Aidan MacDonald wrote:
> On Mon, Apr 11, 2022 at 08:41:26PM +0800, Zhou Yanjie wrote:
>> Hi Aidan,
>>
>> On 2022/4/11 下午6:01, Aidan MacDonald wrote:
>>> Copied from the jz4740 devicetree and trimmed to 5 timers, which
>>> is what the hardware supports.
>>>
>>> Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@...il.com>
>>> ---
>>>    arch/mips/boot/dts/ingenic/x1000.dtsi | 13 +++++++++++++
>>>    1 file changed, 13 insertions(+)
>>>
>>> diff --git a/arch/mips/boot/dts/ingenic/x1000.dtsi b/arch/mips/boot/dts/ingenic/x1000.dtsi
>>> index 8bd27edef216..0dcf37527c8e 100644
>>> --- a/arch/mips/boot/dts/ingenic/x1000.dtsi
>>> +++ b/arch/mips/boot/dts/ingenic/x1000.dtsi
>>> @@ -127,6 +127,19 @@ wdt: watchdog@0 {
>>>    			clocks = <&tcu TCU_CLK_WDT>;
>>>    			clock-names = "wdt";
>>>    		};
>>> +
>>> +		pwm: pwm@40 {
>>> +			compatible = "ingenic,x1000-pwm";
>>> +			reg = <0x40 0x80>;
>>
>> It seems more reasonable to use "reg = <0x40 0x80>" since the
>> X1000 has only 5 PWM channels.
> I think you mean "reg = <0x40 0x60>" but I'll do that, thanks!


Ah, yes, what a what a stupid mistake... :(


>
>>> +
>>> +			#pwm-cells = <3>;
>>> +
>>> +			clocks = <&tcu TCU_CLK_TIMER0>, <&tcu TCU_CLK_TIMER1>,
>>> +				 <&tcu TCU_CLK_TIMER2>, <&tcu TCU_CLK_TIMER3>,
>>> +				 <&tcu TCU_CLK_TIMER4>;
>>> +			clock-names = "timer0", "timer1", "timer2",
>>> +				      "timer3", "timer4";
>>
>> One line is now allowed to hold at most 100 characters,
>> so it is possible to use only one line like:
>>
>>           clock-names = "timer0", "timer1", "timer2", "timer3", "timer4";
>>
>> to reduce the number of lines in the dtsi file.
> Sounds good to me.
>
>>
>> Thanks and best regards!
>>
>>
>>> +		};
>>>    	};
>>>    
>>>    	rtc: rtc@...03000 {
> Regards,
> Aidan