linux-kernel - Re: [PATCH v6 2/2] pwm: sophgo: add pwm support for Sophgo CV1800 SoC

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Date: Tue, 30 Apr 2024 20:47:44 +0800
From: Jingbao Qiu <qiujingbao.dlmu@...il.com>
To: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Cc: robh@...nel.org, krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org, 
	inochiama@...look.com, paul.walmsley@...ive.com, palmer@...belt.com, 
	aou@...s.berkeley.edu, linux-pwm@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v6 2/2] pwm: sophgo: add pwm support for Sophgo CV1800 SoC

On Tue, Apr 30, 2024 at 4:06 PM Uwe Kleine-König
<u.kleine-koenig@...gutronix.de> wrote:
>
> Hello Jingbao,
>
> On Tue, Apr 30, 2024 at 12:36:56PM +0800, Jingbao Qiu wrote:
> > On Mon, Apr 29, 2024 at 10:54 PM Uwe Kleine-König
> > <u.kleine-koenig@...gutronix.de> wrote:
> > > On Sat, Apr 06, 2024 at 02:34:13PM +0800, Jingbao Qiu wrote:
> > > > + * Limitations:
> > > > + * - It output low when PWM channel disabled.
> > >
> > > Just to be sure: the output is low independant of the POLARITY register?
> >
> > When the value of the POLARITY register is 1, the PWM outputs a high level.
> > When the value of the POLARITY register is 0, the PWM output is low.
> > Should I make this point here?
>
> So that's: The hardware emits the inactive level when disabled.
>

I will do that.

Best regards
Jingbao Qiu