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| author | Shawn Guo <shawn.guo@linaro.org> | 2013-01-18 15:57:46 +0800 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2013-01-22 10:23:35 +0100 |
| commit | 6a89a314ab107a12af08c71420c19a37a30fc2d3 (patch) | |
| tree | 391e95b100c796b0983f903e1cfc4f9dd2cfd2e4 /include/linux/gpio.h | |
| parent | d59b4eaaf04db07a02f092bfcb00de7f2e2d10db (diff) | |
| download | linux-6a89a314ab107a12af08c71420c19a37a30fc2d3.tar.gz linux-6a89a314ab107a12af08c71420c19a37a30fc2d3.tar.bz2 linux-6a89a314ab107a12af08c71420c19a37a30fc2d3.zip | |
gpio: devm_gpio_* support should not depend on GPIOLIB
Some architectures (e.g. blackfin) provide gpio API without requiring
GPIOLIB support (ARCH_WANT_OPTIONAL_GPIOLIB). devm_gpio_* functions
should also work for these architectures, since they do not really
depend on GPIOLIB.
Add a new option GPIO_DEVRES (enabled by default) to control the build
of devres.c. It also removes the empty version of devm_gpio_*
functions for !GENERIC_GPIO build from linux/gpio.h, and moves the
function declarations from asm-generic/gpio.h into linux/gpio.h.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'include/linux/gpio.h')
| -rw-r--r-- | include/linux/gpio.h | 28 |
1 files changed, 8 insertions, 20 deletions
diff --git a/include/linux/gpio.h b/include/linux/gpio.h index bfe665621536..f6c7ae3e223b 100644 --- a/include/linux/gpio.h +++ b/include/linux/gpio.h @@ -94,24 +94,12 @@ static inline int gpio_request(unsigned gpio, const char *label) return -ENOSYS; } -static inline int devm_gpio_request(struct device *dev, unsigned gpio, - const char *label) -{ - return -ENOSYS; -} - static inline int gpio_request_one(unsigned gpio, unsigned long flags, const char *label) { return -ENOSYS; } -static inline int devm_gpio_request_one(struct device *dev, unsigned gpio, - unsigned long flags, const char *label) -{ - return -ENOSYS; -} - static inline int gpio_request_array(const struct gpio *array, size_t num) { return -ENOSYS; @@ -125,14 +113,6 @@ static inline void gpio_free(unsigned gpio) WARN_ON(1); } -static inline void devm_gpio_free(struct device *dev, unsigned gpio) -{ - might_sleep(); - - /* GPIO can never have been requested */ - WARN_ON(1); -} - static inline void gpio_free_array(const struct gpio *array, size_t num) { might_sleep(); @@ -248,4 +228,12 @@ gpiochip_remove_pin_ranges(struct gpio_chip *chip) #endif /* ! CONFIG_GENERIC_GPIO */ +struct device; + +/* bindings for managed devices that want to request gpios */ +int devm_gpio_request(struct device *dev, unsigned gpio, const char *label); +int devm_gpio_request_one(struct device *dev, unsigned gpio, + unsigned long flags, const char *label); +void devm_gpio_free(struct device *dev, unsigned int gpio); + #endif /* __LINUX_GPIO_H */ |