linux-kernel - Re: [PATCH v3 0/6] Add drive-strength in Meson pinctrl driver

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Date:   Tue, 07 May 2019 17:45:00 +0200
From:   Jerome Brunet <jbrunet@...libre.com>
To:     Guillaume La Roque <glaroque@...libre.com>,
        linus.walleij@...aro.org, robh+dt@...nel.org, mark.rutland@....com,
        khilman@...libre.com
Cc:     linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 0/6]  Add drive-strength in Meson pinctrl driver

On Tue, 2019-05-07 at 13:57 +0200, Guillaume La Roque 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
> 
> Changes since v2:
> - update driver-strength-uA property to be compliant with DT documentation
> - rework patch series for better understanding
> - rework set_bias function
> 
> Changes since v1:
> - fix missing break
> - implement new pinctrl generic property "drive-strength-uA"
> 
> [1] https://lkml.kernel.org/r/20190314163725.7918-1-jbrunet@baylibre.com
> 
> 
> Guillaume La Roque (6):
>   dt-bindings: pinctrl: add a 'drive-strength-microamp' property
>   pinctrl: generic: add new 'drive-strength-microamp' property support
>   dt-bindings: pinctrl: meson: Add drive-strength-microamp property
>   pinctrl: meson: Rework enable/disable bias part
>   pinctrl: meson: add support of drive-strength-microamp
>   pinctrl: meson: g12a: add DS bank value
> 
>  .../bindings/pinctrl/meson,pinctrl.txt        |   4 +
>  .../bindings/pinctrl/pinctrl-bindings.txt     |   3 +
>  drivers/pinctrl/meson/pinctrl-meson-g12a.c    |  36 ++--
>  drivers/pinctrl/meson/pinctrl-meson.c         | 177 +++++++++++++++---
>  drivers/pinctrl/meson/pinctrl-meson.h         |  18 +-
>  drivers/pinctrl/pinconf-generic.c             |   2 +
>  include/linux/pinctrl/pinconf-generic.h       |   3 +
>  7 files changed, 195 insertions(+), 48 deletions(-)
> 

Tested-by: Jerome Brunet <jbrunet@...libre.com>