linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * ACPI helpers for GPIO API

 *

 * Copyright (C) 2012, Intel Corporation

 * Authors: Mathias Nyman <mathias.nyman@linux.intel.com>

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

 */

​

#include <linux/errno.h>

#include <linux/gpio/consumer.h>

#include <linux/gpio/driver.h>

#include <linux/gpio/machine.h>

#include <linux/export.h>

#include <linux/acpi.h>

#include <linux/interrupt.h>

#include <linux/mutex.h>

#include <linux/pinctrl/pinctrl.h>

​

#include "gpiolib.h"

​

/**

 * struct acpi_gpio_event - ACPI GPIO event handler data

 *

 * @node:     list-entry of the events list of the struct acpi_gpio_chip

 * @handle:   handle of ACPI method to execute when the IRQ triggers

 * @handler:      irq_handler to pass to request_irq when requesting the IRQ

 * @pin:      GPIO pin number on the gpio_chip

 * @irq:      Linux IRQ number for the event, for request_ / free_irq

 * @irqflags:     flags to pass to request_irq when requesting the IRQ

 * @irq_is_wake:  If the ACPI flags indicate the IRQ is a wakeup source

 * @irq_requested:True if request_irq has been done

 * @desc:     gpio_desc for the GPIO pin for this event

 */

struct acpi_gpio_event {

    struct list_head node;

    acpi_handle handle;

    irq_handler_t handler;

    unsigned int pin;

    unsigned int irq;

    unsigned long irqflags;

    bool irq_is_wake;

    bool irq_requested;

    struct gpio_desc *desc;

};

​

struct acpi_gpio_connection {

    struct list_head node;

    unsigned int pin;

    struct gpio_desc *desc;

};

​

struct acpi_gpio_chip {

    /*

     * ACPICA requires that the first field of the context parameter

     * passed to acpi_install_address_space_handler() is large enough

     * to hold struct acpi_connection_info.

     */

    struct acpi_connection_info conn_info;

    struct list_head conns;

    struct mutex conn_lock;

    struct gpio_chip *chip;

    struct list_head events;