gpio: raspberrypi-exp: Driver for RPi3 GPIO expander via mailbox service

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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@i2se.com>
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

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Dave Stevenson 2018-02-20 14:19:33 +02:00 • committed by Linus Walleij

parent 9777d8099a

commit a98d90e7d5

3 changed files with 262 additions and 0 deletions

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9

drivers/gpio/Kconfig

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1

drivers/gpio/Makefile

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252

drivers/gpio/gpio-raspberrypi-exp.c

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