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| author | Simon Glass <sjg@chromium.org> | 2016-03-06 19:27:50 -0700 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2016-03-17 10:27:22 +0800 |
| commit | bbf2478026c0addfff000f31cc1b5639cbff52cb (patch) | |
| tree | 58db941696e2d4153370d1b25c11579a89dc8dd3 /include/asm-generic | |
| parent | 740d5d34b12f49b5e6c48e06dd8f519d9563a7e3 (diff) | |
| download | u-boot-imx-bbf2478026c0addfff000f31cc1b5639cbff52cb.zip u-boot-imx-bbf2478026c0addfff000f31cc1b5639cbff52cb.tar.gz u-boot-imx-bbf2478026c0addfff000f31cc1b5639cbff52cb.tar.bz2 | |
gpio: Add a function to obtain a GPIO vector value
We can use GPIOs as binary digits for reading 'strapping' values. Each GPIO
is assigned a single bit and can be set high or low on the circuit board. We
already have a legacy function for reading these values. Add one that
supports driver model.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/gpio.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h index 0af599f..059f339 100644 --- a/include/asm-generic/gpio.h +++ b/include/asm-generic/gpio.h @@ -360,6 +360,18 @@ int gpio_lookup_name(const char *name, struct udevice **devp, int gpio_get_values_as_int(const int *gpio_list); /** + * dm_gpio_get_values_as_int() - Turn the values of a list of GPIOs into an int + * + * This puts the value of the first GPIO into bit 0, the second into bit 1, + * etc. then returns the resulting integer. + * + * @desc_list: List of GPIOs to collect + * @count: Number of GPIOs + * @return resulting integer value, or -ve on error + */ +int dm_gpio_get_values_as_int(struct gpio_desc *desc_list, int count); + +/** * gpio_claim_vector() - claim a number of GPIOs for input * * @gpio_num_array: array of gpios to claim, terminated by -1 |