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| author | Alexandre Courbot <acourbot@nvidia.com> | 2014-08-19 10:06:09 -0700 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2014-08-29 08:58:34 +0200 |
| commit | abdc08a3a263a20e49534a36291d657bf53dda5b (patch) | |
| tree | e26e4f6c9f26f8d7dda2415b0e9ee0b00b03a331 /Documentation/gpio | |
| parent | e46cf32ced90d00972d5c3d9322cdb848d183338 (diff) | |
| download | linux-rpi3-abdc08a3a263a20e49534a36291d657bf53dda5b.tar.gz linux-rpi3-abdc08a3a263a20e49534a36291d657bf53dda5b.tar.bz2 linux-rpi3-abdc08a3a263a20e49534a36291d657bf53dda5b.zip | |
gpio: change gpiochip_request_own_desc() prototype
The current prototype of gpiochip_request_own_desc() requires to obtain
a pointer to a descriptor. This is in contradiction to all other GPIO
request schemes, and imposes an extra step of obtaining a descriptor to
drivers. Most drivers actually cannot even perform that step since the
function that does it (gpichip_get_desc()) is gpiolib-private.
Change gpiochip_request_own_desc() to return a descriptor from a
(chip, hwnum) tuple and update users of this function (currently
gpiolib-acpi only).
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/gpio')
| -rw-r--r-- | Documentation/gpio/driver.txt | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/gpio/driver.txt b/Documentation/gpio/driver.txt index 18790c237977..23b751a10d7b 100644 --- a/Documentation/gpio/driver.txt +++ b/Documentation/gpio/driver.txt @@ -178,7 +178,8 @@ does not help since it pins the module to the kernel forever (it calls try_module_get()). A GPIO driver can use the following functions instead to request and free descriptors without being pinned to the kernel forever. - int gpiochip_request_own_desc(struct gpio_desc *desc, const char *label) + struct gpio_desc *gpiochip_request_own_desc(struct gpio_desc *desc, + const char *label) void gpiochip_free_own_desc(struct gpio_desc *desc) |