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gpio: Add definition for GPIO direction

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At least for me it is difficult to remember the meaning of GPIO
direction values. Define GPIO_LINE_DIRECTION_IN and
GPIO_LINE_DIRECTION_OUT so that occasional GPIO contributors would
not need to always check the meaning of hard coded values 1 and 0.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Matti Vaittinen 2019-11-06 10:51:47 +02:00 committed by Linus Walleij
parent 5d682fa3d8
commit 9208b1e77d
1 changed files with 3 additions and 0 deletions
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3
include/linux/gpio/driver.h
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@ -22,6 +22,9 @@ enum gpio_lookup_flags;
struct gpio_chip;
#define GPIO_LINE_DIRECTION_IN 1
#define GPIO_LINE_DIRECTION_OUT 0
/**
* struct gpio_irq_chip - GPIO interrupt controller
*/