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| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2018-01-09 12:35:54 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2018-01-09 15:36:19 +0100 |
| commit | 9961dbcd228e868224f5f725dfae69de739855dc (patch) | |
| tree | ddec6cb7f2e68d22943af3ea70f640b07c40b1c0 /Documentation/gpio | |
| parent | 94fc73094abe4798be8d4af60227be41a6dc3be8 (diff) | |
| download | linux-9961dbcd228e868224f5f725dfae69de739855dc.tar.gz linux-9961dbcd228e868224f5f725dfae69de739855dc.tar.bz2 linux-9961dbcd228e868224f5f725dfae69de739855dc.zip | |
Documentation: gpio: correct return value of gpiod_get_direction
The use of the GPIOF_* flags is deprecated, so don't advertise them
here. Document the plain numbers for now until we have a better
solution.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/gpio')
| -rw-r--r-- | Documentation/gpio/consumer.txt | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/gpio/consumer.txt b/Documentation/gpio/consumer.txt index 63e1bd1d88e3..7aac33081510 100644 --- a/Documentation/gpio/consumer.txt +++ b/Documentation/gpio/consumer.txt @@ -184,7 +184,7 @@ A driver can also query the current direction of a GPIO: int gpiod_get_direction(const struct gpio_desc *desc) -This function will return either GPIOF_DIR_IN or GPIOF_DIR_OUT. +This function returns 0 for output, 1 for input, or an error code in case of error. Be aware that there is no default direction for GPIOs. Therefore, **using a GPIO without setting its direction first is illegal and will result in undefined |