linux-imx

/*

 * userspace-consumer.c

 *

 * Copyright 2009 CompuLab, Ltd.

 *

 * Author: Mike Rapoport <mike@compulab.co.il>

 *

 * Based of virtual consumer driver:

 *   Copyright 2008 Wolfson Microelectronics PLC.

 *   Author: Mark Brown <broonie@opensource.wolfsonmicro.com>

 *

 * 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/err.h>

#include <linux/mutex.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/regulator/consumer.h>

#include <linux/regulator/userspace-consumer.h>

#include <linux/slab.h>

​

struct userspace_consumer_data {

    const char *name;

​

    struct mutex lock;

    bool enabled;

​

    int num_supplies;

    struct regulator_bulk_data *supplies;

};

​

static ssize_t reg_show_name(struct device *dev,

              struct device_attribute *attr, char *buf)

{

    struct userspace_consumer_data *data = dev_get_drvdata(dev);

​

    return sprintf(buf, "%s\n", data->name);

}

​

static ssize_t reg_show_state(struct device *dev,

              struct device_attribute *attr, char *buf)

{

    struct userspace_consumer_data *data = dev_get_drvdata(dev);

​

    if (data->enabled)

        return sprintf(buf, "enabled\n");

​

    return sprintf(buf, "disabled\n");

}

​

static ssize_t reg_set_state(struct device *dev, struct device_attribute *attr,

             const char *buf, size_t count)

{

    struct userspace_consumer_data *data = dev_get_drvdata(dev);

    bool enabled;

    int ret;

​

    /*