From ff64abefb6680dfc2aca7ecaa5e695949e7335c9 Mon Sep 17 00:00:00 2001 From: Jean-Christophe PLAGNIOL-VILLARD Date: Thu, 2 Feb 2012 16:20:01 +0100 Subject: of_gpio: add support of of_gpio_named_count to be able to count named gpio Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD Cc: devicetree-discuss@lists.ozlabs.org Signed-off-by: Grant Likely --- include/linux/of_gpio.h | 27 +++++++++++++++++++++++++-- 1 file changed, 25 insertions(+), 2 deletions(-) (limited to 'include/linux/of_gpio.h') diff --git a/include/linux/of_gpio.h b/include/linux/of_gpio.h index b254052a49d7..81733d12cbea 100644 --- a/include/linux/of_gpio.h +++ b/include/linux/of_gpio.h @@ -50,7 +50,8 @@ static inline struct of_mm_gpio_chip *to_of_mm_gpio_chip(struct gpio_chip *gc) extern int of_get_named_gpio_flags(struct device_node *np, const char *list_name, int index, enum of_gpio_flags *flags); -extern unsigned int of_gpio_count(struct device_node *np); +extern unsigned int of_gpio_named_count(struct device_node *np, + const char* propname); extern int of_mm_gpiochip_add(struct device_node *np, struct of_mm_gpio_chip *mm_gc); @@ -71,7 +72,8 @@ static inline int of_get_named_gpio_flags(struct device_node *np, return -ENOSYS; } -static inline unsigned int of_gpio_count(struct device_node *np) +static inline unsigned int of_gpio_named_count(struct device_node *np, + const char* propname) { return 0; } @@ -88,6 +90,27 @@ static inline void of_gpiochip_remove(struct gpio_chip *gc) { } #endif /* CONFIG_OF_GPIO */ +/** + * of_gpio_count - Count GPIOs for a device + * @np: device node to count GPIOs for + * + * The function returns the count of GPIOs specified for a node. + * + * Note that the empty GPIO specifiers counts too. For example, + * + * gpios = <0 + * &pio1 1 2 + * 0 + * &pio2 3 4>; + * + * defines four GPIOs (so this function will return 4), two of which + * are not specified. + */ +static inline unsigned int of_gpio_count(struct device_node *np) +{ + return of_gpio_named_count(np, "gpios"); +} + /** * of_get_gpio_flags() - Get a GPIO number and flags to use with GPIO API * @np: device node to get GPIO from -- cgit v1.2.3