gpiolib: Introduce for_each_requested_gpio_in_range() macro (b3337eb2) · Commits · 戴 / test

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 <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20200615150545.87964-2-andriy.shevchenko@linux.intel.com Signed-off-by:

Linus Walleij <linus.walleij@linaro.org>

include/linux/gpio/driver.h

+16 −0

Original line number	Diff line number	Diff line
		@@ -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,

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