linux-imx

/* SPDX-License-Identifier: GPL-2.0 */

/*

 * Internal GPIO functions.

 *

 * Copyright (C) 2013, Intel Corporation

 * Author: Mika Westerberg <mika.westerberg@linux.intel.com>

 */

​

#ifndef GPIOLIB_H

#define GPIOLIB_H

​

#include <linux/gpio/driver.h>

#include <linux/gpio/consumer.h> /* for enum gpiod_flags */

#include <linux/err.h>

#include <linux/device.h>

#include <linux/module.h>

#include <linux/cdev.h>

​

enum of_gpio_flags;

enum gpio_lookup_flags;

struct acpi_device;

​

/**

 * struct gpio_device - internal state container for GPIO devices

 * @id: numerical ID number for the GPIO chip

 * @dev: the GPIO device struct

 * @chrdev: character device for the GPIO device

 * @mockdev: class device used by the deprecated sysfs interface (may be

 * NULL)

 * @owner: helps prevent removal of modules exporting active GPIOs

 * @chip: pointer to the corresponding gpiochip, holding static

 * data for this device

 * @descs: array of ngpio descriptors.

 * @ngpio: the number of GPIO lines on this GPIO device, equal to the size

 * of the @descs array.

 * @base: GPIO base in the DEPRECATED global Linux GPIO numberspace, assigned

 * at device creation time.

 * @label: a descriptive name for the GPIO device, such as the part number

 * or name of the IP component in a System on Chip.

 * @data: per-instance data assigned by the driver

 * @list: links gpio_device:s together for traversal

 *

 * This state container holds most of the runtime variable data

 * for a GPIO device and can hold references and live on after the

 * GPIO chip has been removed, if it is still being used from

 * userspace.

 */

struct gpio_device {

    int         id;

    struct device       dev;

    struct cdev     chrdev;

    struct device       *mockdev;

    struct module       *owner;

    struct gpio_chip    *chip;

    struct gpio_desc    *descs;

    int         base;

    u16         ngpio;

    const char      *label;

    void            *data;

    struct list_head        list;

​

#ifdef CONFIG_PINCTRL

    /*