Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
MIME-Version: 1.0
References: <20191014124803.13661-1-miquel.raynal@bootlin.com>
In-Reply-To: <20191014124803.13661-1-miquel.raynal@bootlin.com>
From:   Andy Shevchenko <andy.shevchenko@gmail.com>
Date:   Mon, 14 Oct 2019 20:59:01 +0300
Message-ID: <CAHp75Vc4vnNVKc+Q_TY8DpwV4rLZYGm2MvGBC7r67XjmtNoskQ@mail.gmail.com>
Subject: Re: [PATCH] gpio: pca953x: Add Maxim MAX7313 PWM support
To:     Miquel Raynal <miquel.raynal@bootlin.com>
Cc:     Linus Walleij <linus.walleij@linaro.org>,
        Bartosz Golaszewski <bgolaszewski@baylibre.com>,
        Thierry Reding <thierry.reding@gmail.com>,
        =?UTF-8?Q?Uwe_Kleine=2DK=C3=B6nig?= 
        <u.kleine-koenig@pengutronix.de>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
        linux-pwm@vger.kernel.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Content-Type: text/plain; charset="UTF-8"
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Mon, Oct 14, 2019 at 4:09 PM Miquel Raynal <miquel.raynal@bootlin.com> wrote:
>
> The MAX7313 chip is fully compatible with the PCA9535 on its basic
> functions but can also manage the intensity on each of its ports with
> PWM. Each output is independent and may be tuned with 16 values (4
> bits per output). The period is always 32kHz, only the duty-cycle may
> be changed. One can use any output as GPIO or PWM.

Can we rather not contaminate driver with this?

Just register a separate PWM driver and export its functionality to
GPIO, or other way around (in the latter case we actually have PCA8685
which provides a GPIO fgunctionality).

-- 
With Best Regards,
Andy Shevchenko