linux-kernel - Re: [PATCH v2 1/2] drivers: pwm: core: implement pwm dead-times

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Message-ID: <CAHp75Ve=v=50UmpOyi1guY3NVuk41U0Ma+_P__5NK7_dNr6gZg@mail.gmail.com>
Date:   Sun, 28 May 2017 01:28:45 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Claudiu Beznea <claudiu.beznea@...rochip.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Corbet <corbet@....net>,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        linux-pwm@...r.kernel.org,
        Linux Documentation List <linux-doc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        nicolas.ferre@...rochip.com
Subject: Re: [PATCH v2 1/2] drivers: pwm: core: implement pwm dead-times

On Tue, May 9, 2017 at 11:19 AM, Claudiu Beznea
<claudiu.beznea@...rochip.com> wrote:
> Extends PWM framework to support PWM dead-times.
> The notions introduced are rising edge dead-time
> and falling edge dead-time. These are useful for
> PWM controllers with channels that have more than
> one outputs.
> The implementation add sysfs interface for
> configuration. It extends the pwm_state structure
> with two new members which keeps the values for
> dead-times.
> There were no additions in device tree for PWM channels
> initialized by device tree.

AFAIU it's effectively called phase of the signal.
It looks to me much simpler if you allow to have linked / virtual
channels instead of creating a lot of (duplicated) properties.

-- 
With Best Regards,
Andy Shevchenko