From e5901c94e32b3533c35511d1acfb7f1587e324ee Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Mon, 10 Nov 2014 18:00:21 -0700 Subject: dm: gpio: Add a function to read an ID from a list of GPIOs For board IDs a common approach is to set aside several GPIOs for use in determining the board ID. This can provide information about board features and the revision. Add a function that turns a list of GPIOs into an integer by assigning each GPIO to a single bit. Signed-off-by: Simon Glass --- include/asm-generic/gpio.h | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) (limited to 'include/asm-generic/gpio.h') diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h index f81b51a..36a36c6 100644 --- a/include/asm-generic/gpio.h +++ b/include/asm-generic/gpio.h @@ -257,6 +257,15 @@ const char *gpio_get_bank_info(struct udevice *dev, int *offset_count); int gpio_lookup_name(const char *name, struct udevice **devp, unsigned int *offsetp, unsigned int *gpiop); -int name_to_gpio(const char *name); +/** + * get_gpios() - Turn the values of a list of GPIOs into an integer + * + * This puts the value of the first GPIO into bit 0, the second into bit 1, + * etc. then returns the resulting integer. + * + * @gpio_list: List of GPIOs to collect + * @return resulting integer value + */ +unsigned gpio_get_values_as_int(const int *gpio_list); #endif /* _ASM_GENERIC_GPIO_H_ */ -- cgit v1.1