linux-kernel - Re: [PATCH 1/1] pwm: pca9685: fix gpio-only operation.

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Message-ID: <CAGngYiVpWa9qrTFn9BmTahgyBZDsX22vjfjL=4JZUMV9W+nxmw@mail.gmail.com>
Date:   Mon, 10 Apr 2017 23:35:39 -0400
From:   Sven Van Asbroeck <thesven73@...il.com>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        linux-pwm@...r.kernel.org, linux-kernel@...r.kernel.org,
        clemens.gruber@...ruber.com, andriy.shevchenko@...ux.intel.com,
        Sven Van Asbroeck <TheSven73@...glemail.com>
Subject: Re: [PATCH 1/1] pwm: pca9685: fix gpio-only operation.

> How about implementing a real runtime PM in the driver? Then when the
> device is idle regardless of whether it is GPIO or PWM, the SLEEP bit is
> set and cleared accordingly.

You mean: increase the runtime_pm refcnt when a pwm/gpio is enabled,
and vice versa ? And don't touch the refcnt on pwm/gpio export/unexport?

Neat. I will test such a solution and try to post it within the next few days.