gpio: Add driver for SPI serializers

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Add generic parallel-in/serial-out shift register GPIO driver.

This includes SPI compatible devices like SN74165 serial-out shift
registers and the SN65HVS88x series of industrial serializers that can
be read over the SPI bus and used for GPI (General Purpose Input).

Signed-off-by: Andrew F. Davis <afd@ti.com>
Tested-by: Sean Nyekjaer <sean.nyekjaer@prevas.dk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

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Andrew F. Davis 2016-01-25 10:37:31 -06:00 • committed by Linus Walleij

parent 28be55dfed

commit df6df93c8a

3 changed files with 195 additions and 0 deletions

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6

drivers/gpio/Kconfig

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1

drivers/gpio/Makefile

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188

drivers/gpio/gpio-pisosr.c

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