diff options
author | Simon Glass <sjg@chromium.org> | 2014-11-10 18:00:21 -0700 |
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committer | Simon Glass <sjg@chromium.org> | 2014-11-21 07:24:11 +0100 |
commit | e5901c94e32b3533c35511d1acfb7f1587e324ee (patch) | |
tree | 6dc5d86c7f55b0ac45e60bb3b019ceec02db59ec /include/asm-generic/gpio.h | |
parent | 469a579df2907a421afec06e37d50e61b7d80227 (diff) | |
download | u-boot-imx-e5901c94e32b3533c35511d1acfb7f1587e324ee.zip u-boot-imx-e5901c94e32b3533c35511d1acfb7f1587e324ee.tar.gz u-boot-imx-e5901c94e32b3533c35511d1acfb7f1587e324ee.tar.bz2 |
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 <sjg@chromium.org>
Diffstat (limited to 'include/asm-generic/gpio.h')
-rw-r--r-- | include/asm-generic/gpio.h | 11 |
1 files changed, 10 insertions, 1 deletions
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_ */ |