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| author | Rojhalat Ibrahim <imr@rtschenk.de> | 2015-02-11 17:28:02 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2015-03-05 09:55:42 +0100 |
| commit | 331758eef83620eef3f21289f0f44aba094d0503 (patch) | |
| tree | 45b24f0b201b6b05333ebcf433a80a41454f6e73 /Documentation/gpio | |
| parent | 668585273246f67b0cdafa30dd2da2047a2e1290 (diff) | |
| download | lwn-331758eef83620eef3f21289f0f44aba094d0503.tar.gz lwn-331758eef83620eef3f21289f0f44aba094d0503.zip | |
gpiolib: add devm_gpiod_get_array and devm_gpiod_put_array functions
Add device managed variants of gpiod_get_array() / gpiod_put_array()
functions for conveniently obtaining and disposing of an entire array
of GPIOs with one function call.
Signed-off-by: Rojhalat Ibrahim <imr@rtschenk.de>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/gpio')
| -rw-r--r-- | Documentation/gpio/consumer.txt | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/Documentation/gpio/consumer.txt b/Documentation/gpio/consumer.txt index 2924f2ffcd91..d29a9725c9e5 100644 --- a/Documentation/gpio/consumer.txt +++ b/Documentation/gpio/consumer.txt @@ -102,11 +102,19 @@ Device-managed variants of these functions are also defined: const char *con_id, enum gpiod_flags flags) - struct gpio_desc * devm_gpiod_get_index_optional(struct device *dev, + struct gpio_desc *devm_gpiod_get_index_optional(struct device *dev, const char *con_id, unsigned int index, enum gpiod_flags flags) + struct gpio_descs *devm_gpiod_get_array(struct device *dev, + const char *con_id, + enum gpiod_flags flags) + + struct gpio_descs *devm_gpiod_get_array_optional(struct device *dev, + const char *con_id, + enum gpiod_flags flags) + A GPIO descriptor can be disposed of using the gpiod_put() function: void gpiod_put(struct gpio_desc *desc) @@ -119,10 +127,12 @@ It is strictly forbidden to use a descriptor after calling these functions. It is also not allowed to individually release descriptors (using gpiod_put()) from an array acquired with gpiod_get_array(). -The device-managed variant is, unsurprisingly: +The device-managed variants are, unsurprisingly: void devm_gpiod_put(struct device *dev, struct gpio_desc *desc) + void devm_gpiod_put_array(struct device *dev, struct gpio_descs *descs) + Using GPIOs =========== |