gpio: Add driver for 74x164 compatible shift-registers
A 74x164 shift register can be seen as a SPI attached GPIO expander.
This adds a driver for those poor-man expanders based on the Linux
driver.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
1 parent a553a4d commit 43ba8232ab75133227cef3a7c4b7ae22703c53c1
@Sebastian Hesselbarth Sebastian Hesselbarth authored on 20 Apr 2015
Sascha Hauer committed on 27 Apr 2015
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drivers/gpio/Kconfig
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drivers/gpio/Makefile
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drivers/gpio/gpio-74164.c 0 → 100644