linux-kernel - Re: [PATCH v8 8/9] pinctrl: madera: Add driver for Cirrus Logic Madera codecs

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Date:   Wed, 21 Mar 2018 09:07:28 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Richard Fitzgerald <rf@...nsource.cirrus.com>
Cc:     Lee Jones <lee.jones@...aro.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        patches@...nsource.cirrus.com,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v8 8/9] pinctrl: madera: Add driver for Cirrus Logic
 Madera codecs

On Mon, Feb 26, 2018 at 2:05 PM, Richard Fitzgerald
<rf@...nsource.cirrus.com> wrote:

> These codecs have a variable number of I/O lines each of which
> is individually selectable to a wide range of possible functions.
>
> The functionality is slightly different from the traditional muxed
> GPIO since most of the functions can be mapped to any pin (and even
> the same function to multiple pins). Most pins have a dedicated
> "alternate" function that is only available on that pin. The
> alternate functions are usually a group of signals, though it is
> not always necessary to enable the full group, depending on the
> alternate function and how it is to be used. The mapping between
> alternate functions and GPIO pins varies between codecs depending
> on the number of alternate functions and available pins.
>
> Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
> Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
> ---
> There are some minor changes since LinusW last reviewed this patch but as
> they are trivial I have carried forward Linus's Reviewed-by:
> - SPDX license headers
> - can now build it as a module
> - avoided a minor checkpatch warning about an unnecessary else {} in
>     madera_get_group_name()

It's fine. Keep my Review tag.

Yours,
Linus Walleij