linux-imx

/*

 * Reset Controller framework

 *

 * Copyright 2013 Philipp Zabel, Pengutronix

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 */

#include <linux/atomic.h>

#include <linux/device.h>

#include <linux/err.h>

#include <linux/export.h>

#include <linux/kernel.h>

#include <linux/kref.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/reset.h>

#include <linux/reset-controller.h>

#include <linux/slab.h>

​

static DEFINE_MUTEX(reset_list_mutex);

static LIST_HEAD(reset_controller_list);

​

static DEFINE_MUTEX(reset_lookup_mutex);

static LIST_HEAD(reset_lookup_list);

​

/**

 * struct reset_control - a reset control

 * @rcdev: a pointer to the reset controller device

 *         this reset control belongs to

 * @list: list entry for the rcdev's reset controller list

 * @id: ID of the reset controller in the reset

 *      controller device

 * @refcnt: Number of gets of this reset_control

 * @shared: Is this a shared (1), or an exclusive (0) reset_control?

 * @deassert_cnt: Number of times this reset line has been deasserted

 * @triggered_count: Number of times this reset line has been reset. Currently

 *                   only used for shared resets, which means that the value

 *                   will be either 0 or 1.

 */

struct reset_control {

    struct reset_controller_dev *rcdev;

    struct list_head list;

    unsigned int id;

    struct kref refcnt;

    bool shared;

    bool array;

    atomic_t deassert_count;

    atomic_t triggered_count;

};

​

/**

 * struct reset_control_array - an array of reset controls

 * @base: reset control for compatibility with reset control API functions

 * @num_rstcs: number of reset controls

 * @rstc: array of reset controls

 */

struct reset_control_array {

    struct reset_control base;

    unsigned int num_rstcs;

    struct reset_control *rstc[];