linux-imx

/*

 * core.c  --  Voltage/Current Regulator framework.

 *

 * Copyright 2007, 2008 Wolfson Microelectronics PLC.

 * Copyright 2008 SlimLogic Ltd.

 *

 * Author: Liam Girdwood <lrg@slimlogic.co.uk>

 *

 *  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/kernel.h>

#include <linux/init.h>

#include <linux/debugfs.h>

#include <linux/device.h>

#include <linux/slab.h>

#include <linux/async.h>

#include <linux/err.h>

#include <linux/mutex.h>

#include <linux/suspend.h>

#include <linux/delay.h>

#include <linux/gpio/consumer.h>

#include <linux/of.h>

#include <linux/regmap.h>

#include <linux/regulator/of_regulator.h>

#include <linux/regulator/consumer.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/machine.h>

#include <linux/module.h>

​

#define CREATE_TRACE_POINTS

#include <trace/events/regulator.h>

​

#include "dummy.h"

#include "internal.h"

​

#define rdev_crit(rdev, fmt, ...)                   \

    pr_crit("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)

#define rdev_err(rdev, fmt, ...)                    \

    pr_err("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)

#define rdev_warn(rdev, fmt, ...)                   \

    pr_warn("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)

#define rdev_info(rdev, fmt, ...)                   \

    pr_info("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)

#define rdev_dbg(rdev, fmt, ...)                    \

    pr_debug("%s: " fmt, rdev_get_name(rdev), ##__VA_ARGS__)

​

static DEFINE_WW_CLASS(regulator_ww_class);

static DEFINE_MUTEX(regulator_nesting_mutex);

static DEFINE_MUTEX(regulator_list_mutex);

static LIST_HEAD(regulator_map_list);

static LIST_HEAD(regulator_ena_gpio_list);

static LIST_HEAD(regulator_supply_alias_list);

static bool has_full_constraints;

​

static struct dentry *debugfs_root;

​

/*

 * struct regulator_map

 *

 * Used to provide symbolic supply names to devices.

 */

struct regulator_map {

    struct list_head list;

    const char *dev_name;   /* The dev_name() for the consumer */

    const char *supply;

    struct regulator_dev *regulator;

};

​

/*

 * struct regulator_enable_gpio

 *

 * Management for shared enable GPIO pin

 */

struct regulator_enable_gpio {

    struct list_head list;

    struct gpio_desc *gpiod;

    u32 enable_count;   /* a number of enabled shared GPIO */

    u32 request_count;  /* a number of requested shared GPIO */

};

​

/*

 * struct regulator_supply_alias

 *

 * Used to map lookups for a supply onto an alternative device.

 */

struct regulator_supply_alias {

    struct list_head list;