linux/gpio/driver.h

1 /* SPDX-License-Identifier: GPL-2.0 */
12 #include <linux/pinctrl/pinconf-generic.h>
29  * struct gpio_irq_chip - GPIO interrupt controller
66 	 * If non-NULL, will be set as the parent of this GPIO interrupt
78 	 * hardware IRQs correspond to the GPIO index 0..ngpio-1 (see the
86 	 * HWIRQ, return -EINVAL, but also make sure to fill in @valid_mask and
101 	 * &gpiochip_populate_parent_fwspec_twocell will be used. A four-cell
219 	 * bits from 0..(ngpios-1) set to "1" as in valid. The callback can
272  * struct gpio_chip - abstract a GPIO controller
274  *	number or the name of the SoC IP-block implementing it.
278  * @request: optional hook for chip-specific activation, such as
280  * @free: optional hook for chip-specific deactivation, such as
285  *	function, even on input-only or output-only gpio chips.
287  *	This can be omitted on input-only or output-only gpio chips.
289  *	This can be omitted on input-only or output-only gpio chips.
297  * @to_irq: optional hook supporting non-static gpio_to_irq() mappings;
309  *	DEPRECATION: providing anything non-negative and nailing the base
310  *	offset of GPIO chips is deprecated. Please pass -1 as base to
314  *	handled is (base + ngpio - 1).
315  * @names: if set, must be an array of strings to use as alternative
316  *      names for the GPIOs in this chip. Any entry in the array
340  * @bgpio_lock: used to lock chip->bgpio_data. Also, this is needed to keep
354  * by "offset" values in the range 0..(@ngpio - 1).  When those signals
401 	const char		*const *names;  member
405 	unsigned long (*read_reg)(void __iomem *reg);
406 	void (*write_reg)(void __iomem *reg, unsigned long data);
466 	 * Callback to translate a device tree GPIO specifier into a chip-
478  * for_each_requested_gpio_in_range - iterates over requested GPIOs in a given range
491 	for_each_requested_gpio_in_range(chip, i, 0, chip->ngpio, label)
499  * gpiochip_add_data() - register a gpio_chip
500  * @gc: the chip to register, with gc->base initialized
501  * @data: driver-private data associated with this chip
506  * can be freely used, the gc->parent device must be registered before
513  * If gc->base is negative, this requests dynamic assignment of
518  * gc->base is invalid or already associated with a different chip.
707  * struct gpio_pin_range - pin range controlled by a gpio chip
774 	return ERR_PTR(-ENODEV);  in gpiod_to_chip()
781 	return -EINVAL;  in gpiochip_lock_as_irq()