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From: Kent Gibson <warthog618@gmail.com>
To: Robert Baumgartner <rbaumgar@redhat.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>,
	Thierry Reding <thierry.reding@gmail.com>,
	Thierry Reding <treding@nvidia.com>,
	"open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
	Bartosz Golaszewski <brgl@bgdev.pl>
Subject: Re: [libgpiod] How can I use PWM
Date: Sun, 7 Aug 2022 22:41:58 +0800	[thread overview]
Message-ID: <20220807144158.GA42204@sol> (raw)
In-Reply-To: <CAKdJ40QmeOgGdbscp06BorATN3d1gW0zraTB+FKSXqRbgowRQA@mail.gmail.com>

On Sun, Aug 07, 2022 at 03:20:33PM +0200, Robert Baumgartner wrote:
> Andy, Kent,
> 
> I believe I am on the right track.
> 
> I added following line to my config.txt
> # enable pwm on pin 18
> dtoverlay=pwm,pin=18,func=2
> 
> Now I have
> # ls /sys/class/pwm/pwmchip0
> device  export  npwm  power  subsystem  uevent  unexport
> # lsmod|grep pwm
> pwm_bcm2835            16384  0
> 

Excellent - if the hardware PWMs cover the lines you are interested in
then that is certainly the way to go.

> and an example I found is working
> https://github.com/jdimpson/syspw
> 

I believe that should be syspwm.

Cheers,
Kent.

      reply	other threads:[~2022-08-07 14:42 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-05 11:14 [libgpiod] How can I use PWM Robert Baumgartner
2022-08-06 10:12 ` Andy Shevchenko
2022-08-06 13:40   ` Kent Gibson
2022-08-06 14:04     ` Andy Shevchenko
2022-08-07 13:20       ` Robert Baumgartner
2022-08-07 14:41         ` Kent Gibson [this message]

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