diff options
| author |   Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2024-02-22 11:25:12 +0100 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2024-02-26 16:43:51 +0100 |
| commit | 3d8bb3d3080d1609c2a6bef007ede2d8f8ffea5b (patch) | |
| tree | b3fe3cda3eb96342b884d5281076daf23b87bafd /include/linux/gpio | |
| parent | gpio: don't warn about removing GPIO chips with active users anymore (diff) | |
| download | wireguard-linux-3d8bb3d3080d1609c2a6bef007ede2d8f8ffea5b.tar.xz wireguard-linux-3d8bb3d3080d1609c2a6bef007ede2d8f8ffea5b.zip | |
gpio: provide for_each_hwgpio()
We only provide iterators for requested GPIOs to provider drivers. In
order to allow them to display debug information about all GPIOs, let's
provide a variant for iterating over all GPIOs.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'include/linux/gpio')
| -rw-r--r-- | include/linux/gpio/driver.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index 9c1fbfaebaa8..175129a92656 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -552,6 +552,21 @@ DEFINE_CLASS(_gpiochip_for_each_data, const char **label, int *i) /** + * for_each_hwgpio - Iterates over all GPIOs for given chip. + * @_chip: Chip to iterate over. + * @_i: Loop counter. + * @_label: Place to store the address of the label if the GPIO is requested. + * Set to NULL for unused GPIOs. + */ +#define for_each_hwgpio(_chip, _i, _label) \ + for (CLASS(_gpiochip_for_each_data, _data)(&_label, &_i); \ + *_data.i < _chip->ngpio; \ + (*_data.i)++, kfree(*(_data.label)), *_data.label = NULL) \ + if (IS_ERR(*_data.label = \ + gpiochip_dup_line_label(_chip, *_data.i))) {} \ + else + +/** * for_each_requested_gpio_in_range - iterates over requested GPIOs in a given range * @_chip: the chip to query * @_i: loop variable |