[PATCH 1/3] gpiolib: make gpio_to_chip() public

Anton Vorontsov
2008-08-08T16:18:28Z

We'll need this function to write platform-specific hooks to deal
with pin's dedicated functions. Quite obviously this will work only
for the platforms with 1-to-1 GPIO to PIN mapping.

This is stopgap solution till we think out and implement a proper
api (pinlib?).

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
---
drivers/gpio/gpiolib.c | 3 ++-
include/asm-generic/gpio.h | 1 +
2 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 8d29405..9536fa8 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -81,10 +81,11 @@ static void gpio_ensure_requested(struct gpio_desc *desc)
}

/* caller holds gpio_lock *OR* gpio is marked as requested */
-static inline struct gpio_chip *gpio_to_chip(unsigned gpio)
+struct gpio_chip *gpio_to_chip(unsigned gpio)
{
return gpio_desc[gpio].chip;
}
+EXPORT_SYMBOL_GPL(gpio_to_chip);

/* dynamic allocation of GPIOs, e.g. on a hotplugged device */
static int gpiochip_find_base(int ngpio)
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index 0f99ad3..d70ee45 100644
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -81,6 +81,7 @@ struct gpio_chip {
unsigned exported:1;
};

+extern struct gpio_chip *gpio_to_chip(unsigned gpio);
extern const char *gpiochip_is_requested(struct gpio_chip *chip,
unsigned offset);
extern int __must_check gpiochip_reserve(int start, int ngpio);
--
1.5.5.4