path: root/Documentation/gpio
diff options
authorAlexandre Courbot <acourbot@nvidia.com>2014-08-19 10:06:09 -0700
committerLinus Walleij <linus.walleij@linaro.org>2014-08-29 08:58:34 +0200
commitabdc08a3a263a20e49534a36291d657bf53dda5b (patch)
treee26e4f6c9f26f8d7dda2415b0e9ee0b00b03a331 /Documentation/gpio
parente46cf32ced90d00972d5c3d9322cdb848d183338 (diff)
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')
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)

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