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generated by cgit v1.2.2 (git 2.25.0) at 2026-03-18 07:58:52 -0400
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/*
 * Copyright (C) ST-Ericsson SA 2010
 *
 * License Terms: GNU General Public License v2
 * Authors: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
 *          Bengt Jonsson <bengt.g.jonsson@stericsson.com> for ST-Ericsson
 *
 * UX500 common part of Power domain regulators
 */

#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/regulator/driver.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/slab.h>

#include "dbx500-prcmu.h"

/*
 * power state reference count
 */
static int power_state_active_cnt; /* will initialize to zero */
static DEFINE_SPINLOCK(power_state_active_lock);

int power_state_active_get(void)
{
	unsigned long flags;
	int cnt;

	spin_lock_irqsave(&power_state_active_lock, flags);
	cnt = power_state_active_cnt;
	spin_unlock_irqrestore(&power_state_active_lock, flags);

	return cnt;
}

void power_state_active_enable(void)
{
	unsigned long flags;

	spin_lock_irqsave(&power_state_active_lock, flags);
	power_state_active_cnt++;
	spin_unlock_irqrestore(&power_state_active_lock, flags);
}

int power_state_active_disable(void)
{
	int ret = 0;
	unsigned long flags;

	spin_lock_irqsave(&power_state_active_lock, flags);
	if (power_state_active_cnt <= 0) {
		pr_err("power state: unbalanced enable/disable calls\n");
		ret = -EINVAL;
		goto out;
	}

	power_state_active_cnt--;
out:
	spin_unlock_irqrestore(&power_state_active_lock, flags);
	return ret;
}

#ifdef CONFIG_REGULATOR_DEBUG

static struct ux500_regulator_debug {
	struct dentry *dir;
	struct dentry *status_file;
	struct dentry *power_state_cnt_file;
	struct dbx500_regulator_info *regulator_array;
	int num_regulators;
	u8 *state_before_suspend;
	u8 *state_after_suspend;
} rdebug;

void ux500_regulator_suspend_debug(void)
{
	int i;
	for (i = 0; i < rdebug.num_regulators; i++)
		rdebug.state_before_suspend[i] =
			rdebug.regulator_array[i].is_enabled;