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

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Date:   Fri, 1 Nov 2019 13:49:53 +0200
From:   Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
To:     matti.vaittinen@...rohmeurope.com, mazziesaccount@...il.com
Cc:     Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Pavel Machek <pavel@....cz>, Dan Murphy <dmurphy@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Lee Jones <lee.jones@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-rtc@...r.kernel.org
Subject: [RFC PATCH v3 14/15] gpio: Add definition for GPIO direction

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@...rohmeurope.com>
---

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 =]