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/*
* drivers/misc/max1749.c
*
* Driver for MAX1749, vibrator motor driver.
*
* Copyright (c) 2011, NVIDIA Corporation.
*
* 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.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/regulator/consumer.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/hrtimer.h>
#include <linux/delay.h>
#include "../staging/android/timed_output.h"
static struct regulator *regulator;
static int timeout;
static void vibrator_start(void)
{
regulator_enable(regulator);
}
static void vibrator_stop(void)
{
int ret;
ret = regulator_is_enabled(regulator);
if (ret > 0)
regulator_disable(regulator);
}
/*
* Timeout value can be changed from sysfs entry
* created by timed_output_dev.
* echo 100 > /sys/class/timed_output/vibrator/enable
*/
static void vibrator_enable(struct timed_output_dev *dev, int value)
{
timeout = value;
if (!regulator)
return;
if (value) {
vibrator_start();
msleep(value);
vibrator_stop();
} else {
vibrator_stop();
}
}
/*
* Timeout value can be read from sysfs entry
* created by timed_output_dev.
* cat /sys/class/timed_output/vibrator/enable
*/
static int vibrator_get_time(struct timed_output_dev *dev)
{
return timeout;
}
static struct timed_output_dev vibrator_dev = {
.name = "vibrator",
.get_time = vibrator_get_time,
.enable = vibrator_enable,
};
static int __init vibrator_init(void)
{
int status;
regulator = regulator_get(NULL, "vdd_vbrtr");
if (IS_ERR_OR_NULL(regulator)) {
pr_err("vibrator_init:Couldn't get regulator vdd_vbrtr\n");
regulator = NULL;
return PTR_ERR(regulator);
}
status = timed_output_dev_register(&vibrator_dev);
if (status) {
regulator_put(regulator);
regulator = NULL;
}
return status;
}
static void __exit vibrator_exit(void)
{
if (regulator) {
timed_output_dev_unregister(&vibrator_dev);
regulator_put(regulator);
regulator = NULL;
}
}
MODULE_DESCRIPTION("timed output vibrator device");
MODULE_AUTHOR("GPL");
module_init(vibrator_init);
module_exit(vibrator_exit);
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