[RFC PATCH v3 14/15] gpio: Add definition for GPIO direction

[Matti Vaittinen <matti.vaittinen@xxxxxxxxxxxxxxxxx>]

At least for me it is difficult to remember the meaning of GPIO
direction values. Define GPIO_IN and GPIO_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@xxxxxxxxxxxxxxxxx>
---

Changes since v2 - new patch

 include/linux/gpio/driver.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 5dd9c982e2cb..e83d3f519507 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -22,6 +22,9 @@ enum gpio_lookup_flags;
 
 struct gpio_chip;
 
+#define GPIO_IN		1
+#define GPIO_OUT	0
+
 /**
  * struct gpio_irq_chip - GPIO interrupt controller
  */
-- 
2.21.0


-- 
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =]