[PATCH v5 3/5] gpio: raspberrypi-exp: Driver for RPi3 GPIO expander via mailbox service

Linus Walleij linus.walleij at linaro.org
Thu Feb 22 04:50:50 PST 2018

On Tue, Feb 20, 2018 at 1:19 PM, Baruch Siach <baruch at tkos.co.il> wrote:

> From: Dave Stevenson <dave.stevenson at raspberrypi.org>
> Pi3 and Compute Module 3 have a GPIO expander that the
> VPU communicates with.
> There is a mailbox service that now allows control of this
> expander, so add a kernel driver that can make use of it.
> Reviewed-by: Stefan Wahren <stefan.wahren at i2se.com>
> Signed-off-by: Dave Stevenson <dave.stevenson at raspberrypi.org>
> Signed-off-by: Baruch Siach <baruch at tkos.co.il>
> ---
> v5:
>   * Use the parent node to find the firmware

This v5 version applied to the GPIO tree for v4.17.

Linus Walleij

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