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

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Message-ID: <vxolfkvbquiy2jllncjy3vbfl2jr26wkdvpxv65uz4dneln5jb@ozg6ejzgmj6f>
Date: Tue, 30 Apr 2024 10:06:52 +0200
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: Jingbao Qiu <qiujingbao.dlmu@...il.com>
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

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.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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