linux/gpio/driver.h

1 /* SPDX-License-Identifier: GPL-2.0 */
12 #include <linux/pinctrl/pinconf-generic.h>
30  * struct gpio_irq_chip - GPIO interrupt controller
67 	 * If non-NULL, will be set as the parent of this GPIO interrupt
79 	 * hardware IRQs correspond to the GPIO index 0..ngpio-1 (see the
86 	 * If some ranges of hardware IRQs do not have a corresponding parent
87 	 * HWIRQ, return -EINVAL, but also make sure to fill in @valid_mask and
102 	 * &gpiochip_populate_parent_fwspec_twocell will be used. A four-cell
136 	 * GPIO IRQs, provided by GPIO driver.
194 	 * @map:
198 	unsigned int *map;  member
220 	 * bits from 0..(ngpios-1) set to "1" as in valid. The callback can
240 	 * will allocate and map all IRQs during initialization.
283  * struct gpio_chip - abstract a GPIO controller
285  *	number or the name of the SoC IP-block implementing it.
289  * @request: optional hook for chip-specific activation, such as
291  * @free: optional hook for chip-specific deactivation, such as
296  *	function, even on input-only or output-only gpio chips.
298  *	This can be omitted on input-only or output-only gpio chips.
300  *	This can be omitted on input-only or output-only gpio chips.
308  * @to_irq: optional hook supporting non-static gpio_to_irq() mappings;
320  *	DEPRECATION: providing anything non-negative and nailing the base
321  *	offset of GPIO chips is deprecated. Please pass -1 as base to
325  *	handled is (base + ngpio - 1).
334  *	implies that if the chip supports IRQs, these IRQs need to be threaded
351  * @bgpio_lock: used to lock chip->bgpio_data. Also, this is needed to keep
365  * by "offset" values in the range 0..(@ngpio - 1).  When those signals
434 	 * to handle IRQs for most practical cases.
441 	 * used to handle IRQs for most practical cases.
477 	 * Callback to translate a device tree GPIO specifier into a chip-
492  * for_each_requested_gpio_in_range - iterates over requested GPIOs in a given range
495  * @base:	first GPIO in the range
505 	for_each_requested_gpio_in_range(chip, i, 0, chip->ngpio, label)
513  * gpiochip_add_data() - register a gpio_chip
514  * @gc: the chip to register, with gc->base initialized
515  * @data: driver-private data associated with this chip
517  * Context: potentially before irqs will work
520  * can be freely used, the gc->parent device must be registered before
527  * If gc->base is negative, this requests dynamic assignment of
528  * a range of valid GPIOs.
532  * gc->base is invalid or already associated with a different chip.
662 	return -EINVAL;  in gpiochip_irqchip_add_domain()
730  * struct gpio_pin_range - pin range controlled by a gpio chip
733  * @range: actual range of pins controlled by a gpio controller
738 	struct pinctrl_gpio_range range;  member
797 	return ERR_PTR(-ENODEV);  in gpiod_to_chip()
804 	return -EINVAL;  in gpiochip_lock_as_irq()