linux-kernel - Re: [PATCH RESEND 1/2] gpio: mvebu: Add support for multiple PWM lines per GPIO chip

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Date:   Wed, 29 Aug 2018 14:09:37 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Cc:     aditya@...ol.io,
        "thierry.reding@...il.com" <thierry.reding@...il.com>,
        Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
        Jason Cooper <jason@...edaemon.net>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Richard Genoud <richard.genoud@...il.com>,
        Gregory Clement <gregory.clement@...tlin.com>,
        gauthier@...ol.io, Alban Browaeys <alban.browaeys@...il.com>,
        linux-pwm@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Dennis Gilmore <dennis@...il.us>,
        Ralph Sennhauser <ralph.sennhauser@...il.com>,
        Andrew Lunn <andrew@...n.ch>
Subject: Re: [PATCH RESEND 1/2] gpio: mvebu: Add support for multiple PWM
 lines per GPIO chip

On Wed, Aug 29, 2018 at 10:02 AM Thomas Petazzoni
<thomas.petazzoni@...tlin.com> wrote:

> Andrew Lunn did the initial support for PWM in this driver, and he
> outlined in the commit log the limitation of his first implementation:
>
>     However, there are only two sets of PWM configuration registers for
>     all the GPIO lines. This driver simply allows a single GPIO line per
>     GPIO chip of 32 lines to be used as a PWM. Attempts to use more
>     return EBUSY.
>
> Andrew, perhaps you could review the patch posted by Aditya, since you
> already looked at PWM support on mvebu platforms ?

Thanks yes Andrew is involved, I will wait for Andrew's definitive ACK
before merging any of this.

Yours,
Linus Walleij