From b3337eb24831db058231ea87838f316d9eb86253 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Mon, 15 Jun 2020 18:05:41 +0300 Subject: gpiolib: Introduce for_each_requested_gpio_in_range() macro Introduce for_each_requested_gpio_in_range() macro which helps to iterate over requested GPIO in a range. There are already potential users of it, which are going to be converted by the following patches. For most of them for_each_requested_gpio() shortcut has been added. Signed-off-by: Andy Shevchenko Link: https://lore.kernel.org/r/20200615150545.87964-2-andriy.shevchenko@linux.intel.com Signed-off-by: Linus Walleij --- include/linux/gpio/driver.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'include/linux/gpio') diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index c4f272af7af5..11cdcb195635 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -474,6 +474,22 @@ struct gpio_chip { extern const char *gpiochip_is_requested(struct gpio_chip *gc, unsigned int offset); +/** + * for_each_requested_gpio_in_range - iterates over requested GPIOs in a given range + * @chip: the chip to query + * @i: loop variable + * @base: first GPIO in the range + * @size: amount of GPIOs to check starting from @base + * @label: label of current GPIO + */ +#define for_each_requested_gpio_in_range(chip, i, base, size, label) \ + for (i = 0; i < size; i++) \ + if ((label = gpiochip_is_requested(chip, base + i)) == NULL) {} else + +/* Iterates over all requested GPIO of the given @chip */ +#define for_each_requested_gpio(chip, i, label) \ + for_each_requested_gpio_in_range(chip, i, 0, chip->ngpio, label) + /* add/remove chips */ extern int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data, struct lock_class_key *lock_key, -- cgit