From 3d8bb3d3080d1609c2a6bef007ede2d8f8ffea5b Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Thu, 22 Feb 2024 11:25:12 +0100 Subject: [PATCH] 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 Reviewed-by: Linus Walleij --- include/linux/gpio/driver.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index 9c1fbfaebaa80..175129a926567 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -551,6 +551,21 @@ 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 -- 2.30.2