linux-kernel - Re: [PATCH v2 0/4] Add drive-strength in Meson pinctrl driver

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Message-ID: <CACRpkdbLJYgU5ZP5CkwX1FBv8eHp+7TsAMv3_H51C_EOA85X4A@mail.gmail.com>
Date:   Tue, 23 Apr 2019 13:13:00 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Guillaume La Roque <glaroque@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Kevin Hilman <khilman@...libre.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "open list:ARM/Amlogic Meson..." <linux-amlogic@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 0/4] Add drive-strength in Meson pinctrl driver

On Thu, Apr 18, 2019 at 2:48 PM Guillaume La Roque
<glaroque@...libre.com> wrote:

> The purpose of this patchset is to add drive-strength support in meson pinconf
> driver. This is a new feature that was added on the g12a. It is critical for us
> to support this since many functions are failing with default pad drive-strength.
>
> The value achievable by the SoC are 0.5mA, 2.5mA, 3mA and 4mA and the DT property
> 'drive-strength' is expressed in mA.
> So this patch add another generic property "drive-strength-uA". The change to do so
> would be minimal and could be benefit to other platforms later on.
>
> Cheers
> Guillaume

This needs to be reviewed by Martin Blumenstigl, Martin can you have a look
at this patch set? If you don't have the patches I think Guillaume can
resend them.

Yours,
Linus Walleij