drivers/media/rc/ir-rx51.c - kernel/msm-4.9 - Gitiles

 /*
  *  Copyright (C) 2008 Nokia Corporation
  *
  *  Based on lirc_serial.c
  *
  *  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.
  */
 #include <linux/clk.h>
 #include <linux/module.h>
 #include <linux/interrupt.h>
 #include <linux/uaccess.h>
 #include <linux/platform_device.h>
 #include <linux/sched.h>
 #include <linux/wait.h>
 #include <linux/pwm.h>
 #include <linux/of.h>
 #include <linux/hrtimer.h>

 #include <media/lirc.h>
 #include <media/lirc_dev.h>
 #include <linux/platform_data/media/ir-rx51.h>

 #define LIRC_RX51_DRIVER_FEATURES (LIRC_CAN_SET_SEND_DUTY_CYCLE |	\
 				   LIRC_CAN_SET_SEND_CARRIER |		\
 				   LIRC_CAN_SEND_PULSE)

 #define DRIVER_NAME "lirc_rx51"

 #define WBUF_LEN 256

 struct lirc_rx51 {
 	struct pwm_device *pwm;
 	struct hrtimer timer;
 	struct device	     *dev;
 	struct lirc_rx51_platform_data *pdata;
 	wait_queue_head_t     wqueue;

 	unsigned int	freq;		/* carrier frequency */
 	unsigned int	duty_cycle;	/* carrier duty cycle */
 	int		wbuf[WBUF_LEN];
 	int		wbuf_index;
 	unsigned long	device_is_open;
 };

 static inline void lirc_rx51_on(struct lirc_rx51 *lirc_rx51)
 {
 	pwm_enable(lirc_rx51->pwm);
 }

 static inline void lirc_rx51_off(struct lirc_rx51 *lirc_rx51)
 {
 	pwm_disable(lirc_rx51->pwm);
 }

 static int init_timing_params(struct lirc_rx51 *lirc_rx51)
 {
 	struct pwm_device *pwm = lirc_rx51->pwm;
 	int duty, period = DIV_ROUND_CLOSEST(NSEC_PER_SEC, lirc_rx51->freq);

 	duty = DIV_ROUND_CLOSEST(lirc_rx51->duty_cycle * period, 100);

 	pwm_config(pwm, duty, period);

 	return 0;
 }

 static enum hrtimer_restart lirc_rx51_timer_cb(struct hrtimer *timer)
 {
 	struct lirc_rx51 *lirc_rx51 =
 			container_of(timer, struct lirc_rx51, timer);
 	ktime_t now;

 	if (lirc_rx51->wbuf_index < 0) {
 		dev_err_ratelimited(lirc_rx51->dev,
 				"BUG wbuf_index has value of %i\n",
 				lirc_rx51->wbuf_index);
 		goto end;
 	}

 	/*
 	 * If we happen to hit an odd latency spike, loop through the
 	 * pulses until we catch up.
 	 */
 	do {
 		u64 ns;

 		if (lirc_rx51->wbuf_index >= WBUF_LEN)
 			goto end;
 		if (lirc_rx51->wbuf[lirc_rx51->wbuf_index] == -1)
 			goto end;

 		if (lirc_rx51->wbuf_index % 2)
 			lirc_rx51_off(lirc_rx51);
 		else
 			lirc_rx51_on(lirc_rx51);

 		ns = 1000 * lirc_rx51->wbuf[lirc_rx51->wbuf_index];
 		hrtimer_add_expires_ns(timer, ns);

 		lirc_rx51->wbuf_index++;

 		now = timer->base->get_time();

 	} while (hrtimer_get_expires_tv64(timer) < now.tv64);

 	return HRTIMER_RESTART;
 end:
 	/* Stop TX here */
 	lirc_rx51_off(lirc_rx51);
 	lirc_rx51->wbuf_index = -1;

 	wake_up_interruptible(&lirc_rx51->wqueue);

 	return HRTIMER_NORESTART;
 }

 static ssize_t lirc_rx51_write(struct file *file, const char *buf,
 			  size_t n, loff_t *ppos)
 {
 	int count, i;
 	struct lirc_rx51 *lirc_rx51 = file->private_data;

 	if (n % sizeof(int))
 		return -EINVAL;

 	count = n / sizeof(int);
 	if ((count > WBUF_LEN) || (count % 2 == 0))
 		return -EINVAL;

 	/* Wait any pending transfers to finish */
 	wait_event_interruptible(lirc_rx51->wqueue, lirc_rx51->wbuf_index < 0);

 	if (copy_from_user(lirc_rx51->wbuf, buf, n))
 		return -EFAULT;

 	/* Sanity check the input pulses */
 	for (i = 0; i < count; i++)
 		if (lirc_rx51->wbuf[i] < 0)
 			return -EINVAL;

 	init_timing_params(lirc_rx51);
 	if (count < WBUF_LEN)
 		lirc_rx51->wbuf[count] = -1; /* Insert termination mark */

 	/*
 	 * Adjust latency requirements so the device doesn't go in too
 	 * deep sleep states
 	 */
 	lirc_rx51->pdata->set_max_mpu_wakeup_lat(lirc_rx51->dev, 50);

 	lirc_rx51_on(lirc_rx51);
 	lirc_rx51->wbuf_index = 1;
 	hrtimer_start(&lirc_rx51->timer,
 		      ns_to_ktime(1000 * lirc_rx51->wbuf[0]),
 		      HRTIMER_MODE_REL);
 	/*
 	 * Don't return back to the userspace until the transfer has
 	 * finished
 	 */
 	wait_event_interruptible(lirc_rx51->wqueue, lirc_rx51->wbuf_index < 0);

 	/* We can sleep again */
 	lirc_rx51->pdata->set_max_mpu_wakeup_lat(lirc_rx51->dev, -1);

 	return n;
 }

 static long lirc_rx51_ioctl(struct file *filep,
 			unsigned int cmd, unsigned long arg)
 {
 	int result;
 	unsigned long value;
 	unsigned int ivalue;
 	struct lirc_rx51 *lirc_rx51 = filep->private_data;

 	switch (cmd) {
 	case LIRC_GET_SEND_MODE:
 		result = put_user(LIRC_MODE_PULSE, (unsigned long *)arg);
 		if (result)
 			return result;
 		break;

 	case LIRC_SET_SEND_MODE:
 		result = get_user(value, (unsigned long *)arg);
 		if (result)
 			return result;

 		/* only LIRC_MODE_PULSE supported */
 		if (value != LIRC_MODE_PULSE)
 			return -ENOSYS;
 		break;

 	case LIRC_GET_REC_MODE:
 		result = put_user(0, (unsigned long *) arg);
 		if (result)
 			return result;
 		break;

 	case LIRC_GET_LENGTH:
 		return -ENOSYS;
 		break;

 	case LIRC_SET_SEND_DUTY_CYCLE:
 		result = get_user(ivalue, (unsigned int *) arg);
 		if (result)
 			return result;

 		if (ivalue <= 0 || ivalue > 100) {
 			dev_err(lirc_rx51->dev, ": invalid duty cycle %d\n",
 				ivalue);
 			return -EINVAL;
 		}

 		lirc_rx51->duty_cycle = ivalue;
 		break;

 	case LIRC_SET_SEND_CARRIER:
 		result = get_user(ivalue, (unsigned int *) arg);
 		if (result)
 			return result;

 		if (ivalue > 500000 || ivalue < 20000) {
 			dev_err(lirc_rx51->dev, ": invalid carrier freq %d\n",
 				ivalue);
 			return -EINVAL;
 		}

 		lirc_rx51->freq = ivalue;
 		break;

 	case LIRC_GET_FEATURES:
 		result = put_user(LIRC_RX51_DRIVER_FEATURES,
 				  (unsigned long *) arg);
 		if (result)
 			return result;
 		break;

 	default:
 		return -ENOIOCTLCMD;
 	}

 	return 0;
 }

 static int lirc_rx51_open(struct inode *inode, struct file *file)
 {
 	struct lirc_rx51 *lirc_rx51 = lirc_get_pdata(file);
 	BUG_ON(!lirc_rx51);

 	file->private_data = lirc_rx51;

 	if (test_and_set_bit(1, &lirc_rx51->device_is_open))
 		return -EBUSY;

 	lirc_rx51->pwm = pwm_get(lirc_rx51->dev, NULL);
 	if (IS_ERR(lirc_rx51->pwm)) {
 		int res = PTR_ERR(lirc_rx51->pwm);

 		dev_err(lirc_rx51->dev, "pwm_get failed: %d\n", res);
 		return res;
 	}

 	return 0;
 }

 static int lirc_rx51_release(struct inode *inode, struct file *file)
 {
 	struct lirc_rx51 *lirc_rx51 = file->private_data;

 	hrtimer_cancel(&lirc_rx51->timer);
 	lirc_rx51_off(lirc_rx51);
 	pwm_put(lirc_rx51->pwm);

 	clear_bit(1, &lirc_rx51->device_is_open);

 	return 0;
 }

 static struct lirc_rx51 lirc_rx51 = {
 	.duty_cycle	= 50,
 	.wbuf_index	= -1,
 };

 static const struct file_operations lirc_fops = {
 	.owner		= THIS_MODULE,
 	.write		= lirc_rx51_write,
 	.unlocked_ioctl	= lirc_rx51_ioctl,
 	.read		= lirc_dev_fop_read,
 	.poll		= lirc_dev_fop_poll,
 	.open		= lirc_rx51_open,
 	.release	= lirc_rx51_release,
 };

 static struct lirc_driver lirc_rx51_driver = {
 	.name		= DRIVER_NAME,
 	.minor		= -1,
 	.code_length	= 1,
 	.data		= &lirc_rx51,
 	.fops		= &lirc_fops,
 	.owner		= THIS_MODULE,
 };

 #ifdef CONFIG_PM

 static int lirc_rx51_suspend(struct platform_device *dev, pm_message_t state)
 {
 	/*
 	 * In case the device is still open, do not suspend. Normally
 	 * this should not be a problem as lircd only keeps the device
 	 * open only for short periods of time. We also don't want to
 	 * get involved with race conditions that might happen if we
 	 * were in a middle of a transmit. Thus, we defer any suspend
 	 * actions until transmit has completed.
 	 */
 	if (test_and_set_bit(1, &lirc_rx51.device_is_open))
 		return -EAGAIN;

 	clear_bit(1, &lirc_rx51.device_is_open);

 	return 0;
 }

 static int lirc_rx51_resume(struct platform_device *dev)
 {
 	return 0;
 }

 #else

 #define lirc_rx51_suspend	NULL
 #define lirc_rx51_resume	NULL

 #endif /* CONFIG_PM */

 static int lirc_rx51_probe(struct platform_device *dev)
 {
 	struct pwm_device *pwm;

 	lirc_rx51_driver.features = LIRC_RX51_DRIVER_FEATURES;
 	lirc_rx51.pdata = dev->dev.platform_data;

 	if (!lirc_rx51.pdata) {
 		dev_err(&dev->dev, "Platform Data is missing\n");
 		return -ENXIO;
 	}

 	pwm = pwm_get(&dev->dev, NULL);
 	if (IS_ERR(pwm)) {
 		int err = PTR_ERR(pwm);

 		if (err != -EPROBE_DEFER)
 			dev_err(&dev->dev, "pwm_get failed: %d\n", err);
 		return err;
 	}

 	/* Use default, in case userspace does not set the carrier */
 	lirc_rx51.freq = DIV_ROUND_CLOSEST(pwm_get_period(pwm), NSEC_PER_SEC);
 	pwm_put(pwm);

 	hrtimer_init(&lirc_rx51.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
 	lirc_rx51.timer.function = lirc_rx51_timer_cb;

 	lirc_rx51.dev = &dev->dev;
 	lirc_rx51_driver.dev = &dev->dev;
 	lirc_rx51_driver.minor = lirc_register_driver(&lirc_rx51_driver);
 	init_waitqueue_head(&lirc_rx51.wqueue);

 	if (lirc_rx51_driver.minor < 0) {
 		dev_err(lirc_rx51.dev, ": lirc_register_driver failed: %d\n",
 		       lirc_rx51_driver.minor);
 		return lirc_rx51_driver.minor;
 	}

 	return 0;
 }

 static int lirc_rx51_remove(struct platform_device *dev)
 {
 	return lirc_unregister_driver(lirc_rx51_driver.minor);
 }

 static const struct of_device_id lirc_rx51_match[] = {
 	{
 		.compatible = "nokia,n900-ir",
 	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, lirc_rx51_match);

 struct platform_driver lirc_rx51_platform_driver = {
 	.probe		= lirc_rx51_probe,
 	.remove		= lirc_rx51_remove,
 	.suspend	= lirc_rx51_suspend,
 	.resume		= lirc_rx51_resume,
 	.driver		= {
 		.name	= DRIVER_NAME,
 		.of_match_table = of_match_ptr(lirc_rx51_match),
 	},
 };
 module_platform_driver(lirc_rx51_platform_driver);

 MODULE_DESCRIPTION("LIRC TX driver for Nokia RX51");
 MODULE_AUTHOR("Nokia Corporation");
 MODULE_LICENSE("GPL");
	/*
	* Copyright (C) 2008 Nokia Corporation
	*
	* Based on lirc_serial.c
	*
	* 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.
	*/
	#include <linux/clk.h>
	#include <linux/module.h>
	#include <linux/interrupt.h>
	#include <linux/uaccess.h>
	#include <linux/platform_device.h>
	#include <linux/sched.h>
	#include <linux/wait.h>
	#include <linux/pwm.h>
	#include <linux/of.h>
	#include <linux/hrtimer.h>

	#include <media/lirc.h>
	#include <media/lirc_dev.h>
	#include <linux/platform_data/media/ir-rx51.h>

	#define LIRC_RX51_DRIVER_FEATURES (LIRC_CAN_SET_SEND_DUTY_CYCLE \| \
	LIRC_CAN_SET_SEND_CARRIER \| \
	LIRC_CAN_SEND_PULSE)

	#define DRIVER_NAME "lirc_rx51"

	#define WBUF_LEN 256

	struct lirc_rx51 {
	struct pwm_device *pwm;
	struct hrtimer timer;
	struct device *dev;
	struct lirc_rx51_platform_data *pdata;
	wait_queue_head_t wqueue;

	unsigned int freq; /* carrier frequency */
	unsigned int duty_cycle; /* carrier duty cycle */
	int wbuf[WBUF_LEN];
	int wbuf_index;
	unsigned long device_is_open;
	};

	static inline void lirc_rx51_on(struct lirc_rx51 *lirc_rx51)
	{
	pwm_enable(lirc_rx51->pwm);
	}

	static inline void lirc_rx51_off(struct lirc_rx51 *lirc_rx51)
	{
	pwm_disable(lirc_rx51->pwm);
	}

	static int init_timing_params(struct lirc_rx51 *lirc_rx51)
	{
	struct pwm_device *pwm = lirc_rx51->pwm;
	int duty, period = DIV_ROUND_CLOSEST(NSEC_PER_SEC, lirc_rx51->freq);

	duty = DIV_ROUND_CLOSEST(lirc_rx51->duty_cycle * period, 100);

	pwm_config(pwm, duty, period);

	return 0;
	}

	static enum hrtimer_restart lirc_rx51_timer_cb(struct hrtimer *timer)
	{
	struct lirc_rx51 *lirc_rx51 =
	container_of(timer, struct lirc_rx51, timer);
	ktime_t now;

	if (lirc_rx51->wbuf_index < 0) {
	dev_err_ratelimited(lirc_rx51->dev,
	"BUG wbuf_index has value of %i\n",
	lirc_rx51->wbuf_index);
	goto end;
	}

	/*
	* If we happen to hit an odd latency spike, loop through the
	* pulses until we catch up.
	*/
	do {
	u64 ns;

	if (lirc_rx51->wbuf_index >= WBUF_LEN)
	goto end;
	if (lirc_rx51->wbuf[lirc_rx51->wbuf_index] == -1)
	goto end;

	if (lirc_rx51->wbuf_index % 2)
	lirc_rx51_off(lirc_rx51);
	else
	lirc_rx51_on(lirc_rx51);

	ns = 1000 * lirc_rx51->wbuf[lirc_rx51->wbuf_index];
	hrtimer_add_expires_ns(timer, ns);

	lirc_rx51->wbuf_index++;

	now = timer->base->get_time();

	} while (hrtimer_get_expires_tv64(timer) < now.tv64);

	return HRTIMER_RESTART;
	end:
	/* Stop TX here */
	lirc_rx51_off(lirc_rx51);
	lirc_rx51->wbuf_index = -1;

	wake_up_interruptible(&lirc_rx51->wqueue);

	return HRTIMER_NORESTART;
	}

	static ssize_t lirc_rx51_write(struct file file, const char buf,
	size_t n, loff_t *ppos)
	{
	int count, i;
	struct lirc_rx51 *lirc_rx51 = file->private_data;

	if (n % sizeof(int))
	return -EINVAL;

	count = n / sizeof(int);
	if ((count > WBUF_LEN) \|\| (count % 2 == 0))
	return -EINVAL;

	/* Wait any pending transfers to finish */
	wait_event_interruptible(lirc_rx51->wqueue, lirc_rx51->wbuf_index < 0);

	if (copy_from_user(lirc_rx51->wbuf, buf, n))
	return -EFAULT;

	/* Sanity check the input pulses */
	for (i = 0; i < count; i++)
	if (lirc_rx51->wbuf[i] < 0)
	return -EINVAL;

	init_timing_params(lirc_rx51);
	if (count < WBUF_LEN)
	lirc_rx51->wbuf[count] = -1; /* Insert termination mark */

	/*
	* Adjust latency requirements so the device doesn't go in too
	* deep sleep states
	*/
	lirc_rx51->pdata->set_max_mpu_wakeup_lat(lirc_rx51->dev, 50);

	lirc_rx51_on(lirc_rx51);
	lirc_rx51->wbuf_index = 1;
	hrtimer_start(&lirc_rx51->timer,
	ns_to_ktime(1000 * lirc_rx51->wbuf[0]),
	HRTIMER_MODE_REL);
	/*
	* Don't return back to the userspace until the transfer has
	* finished
	*/
	wait_event_interruptible(lirc_rx51->wqueue, lirc_rx51->wbuf_index < 0);

	/* We can sleep again */
	lirc_rx51->pdata->set_max_mpu_wakeup_lat(lirc_rx51->dev, -1);

	return n;
	}

	static long lirc_rx51_ioctl(struct file *filep,
	unsigned int cmd, unsigned long arg)
	{
	int result;
	unsigned long value;
	unsigned int ivalue;
	struct lirc_rx51 *lirc_rx51 = filep->private_data;

	switch (cmd) {
	case LIRC_GET_SEND_MODE:
	result = put_user(LIRC_MODE_PULSE, (unsigned long *)arg);
	if (result)
	return result;
	break;

	case LIRC_SET_SEND_MODE:
	result = get_user(value, (unsigned long *)arg);
	if (result)
	return result;

	/* only LIRC_MODE_PULSE supported */
	if (value != LIRC_MODE_PULSE)
	return -ENOSYS;
	break;

	case LIRC_GET_REC_MODE:
	result = put_user(0, (unsigned long *) arg);
	if (result)
	return result;
	break;

	case LIRC_GET_LENGTH:
	return -ENOSYS;
	break;

	case LIRC_SET_SEND_DUTY_CYCLE:
	result = get_user(ivalue, (unsigned int *) arg);
	if (result)
	return result;

	if (ivalue <= 0 \|\| ivalue > 100) {
	dev_err(lirc_rx51->dev, ": invalid duty cycle %d\n",
	ivalue);
	return -EINVAL;
	}

	lirc_rx51->duty_cycle = ivalue;
	break;

	case LIRC_SET_SEND_CARRIER:
	result = get_user(ivalue, (unsigned int *) arg);
	if (result)
	return result;

	if (ivalue > 500000 \|\| ivalue < 20000) {
	dev_err(lirc_rx51->dev, ": invalid carrier freq %d\n",
	ivalue);
	return -EINVAL;
	}

	lirc_rx51->freq = ivalue;
	break;

	case LIRC_GET_FEATURES:
	result = put_user(LIRC_RX51_DRIVER_FEATURES,
	(unsigned long *) arg);
	if (result)
	return result;
	break;

	default:
	return -ENOIOCTLCMD;
	}

	return 0;
	}

	static int lirc_rx51_open(struct inode inode, struct file file)
	{
	struct lirc_rx51 *lirc_rx51 = lirc_get_pdata(file);
	BUG_ON(!lirc_rx51);

	file->private_data = lirc_rx51;

	if (test_and_set_bit(1, &lirc_rx51->device_is_open))
	return -EBUSY;

	lirc_rx51->pwm = pwm_get(lirc_rx51->dev, NULL);
	if (IS_ERR(lirc_rx51->pwm)) {
	int res = PTR_ERR(lirc_rx51->pwm);

	dev_err(lirc_rx51->dev, "pwm_get failed: %d\n", res);
	return res;
	}

	return 0;
	}

	static int lirc_rx51_release(struct inode inode, struct file file)
	{
	struct lirc_rx51 *lirc_rx51 = file->private_data;

	hrtimer_cancel(&lirc_rx51->timer);
	lirc_rx51_off(lirc_rx51);
	pwm_put(lirc_rx51->pwm);

	clear_bit(1, &lirc_rx51->device_is_open);

	return 0;
	}

	static struct lirc_rx51 lirc_rx51 = {
	.duty_cycle = 50,
	.wbuf_index = -1,
	};

	static const struct file_operations lirc_fops = {
	.owner = THIS_MODULE,
	.write = lirc_rx51_write,
	.unlocked_ioctl = lirc_rx51_ioctl,
	.read = lirc_dev_fop_read,
	.poll = lirc_dev_fop_poll,
	.open = lirc_rx51_open,
	.release = lirc_rx51_release,
	};

	static struct lirc_driver lirc_rx51_driver = {
	.name = DRIVER_NAME,
	.minor = -1,
	.code_length = 1,
	.data = &lirc_rx51,
	.fops = &lirc_fops,
	.owner = THIS_MODULE,
	};

	#ifdef CONFIG_PM

	static int lirc_rx51_suspend(struct platform_device *dev, pm_message_t state)
	{
	/*
	* In case the device is still open, do not suspend. Normally
	* this should not be a problem as lircd only keeps the device
	* open only for short periods of time. We also don't want to
	* get involved with race conditions that might happen if we
	* were in a middle of a transmit. Thus, we defer any suspend
	* actions until transmit has completed.
	*/
	if (test_and_set_bit(1, &lirc_rx51.device_is_open))
	return -EAGAIN;

	clear_bit(1, &lirc_rx51.device_is_open);

	return 0;
	}

	static int lirc_rx51_resume(struct platform_device *dev)
	{
	return 0;
	}

	#else

	#define lirc_rx51_suspend NULL
	#define lirc_rx51_resume NULL

	#endif /* CONFIG_PM */

	static int lirc_rx51_probe(struct platform_device *dev)
	{
	struct pwm_device *pwm;

	lirc_rx51_driver.features = LIRC_RX51_DRIVER_FEATURES;
	lirc_rx51.pdata = dev->dev.platform_data;

	if (!lirc_rx51.pdata) {
	dev_err(&dev->dev, "Platform Data is missing\n");
	return -ENXIO;
	}

	pwm = pwm_get(&dev->dev, NULL);
	if (IS_ERR(pwm)) {
	int err = PTR_ERR(pwm);

	if (err != -EPROBE_DEFER)
	dev_err(&dev->dev, "pwm_get failed: %d\n", err);
	return err;
	}

	/* Use default, in case userspace does not set the carrier */
	lirc_rx51.freq = DIV_ROUND_CLOSEST(pwm_get_period(pwm), NSEC_PER_SEC);
	pwm_put(pwm);

	hrtimer_init(&lirc_rx51.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
	lirc_rx51.timer.function = lirc_rx51_timer_cb;

	lirc_rx51.dev = &dev->dev;
	lirc_rx51_driver.dev = &dev->dev;
	lirc_rx51_driver.minor = lirc_register_driver(&lirc_rx51_driver);
	init_waitqueue_head(&lirc_rx51.wqueue);

	if (lirc_rx51_driver.minor < 0) {
	dev_err(lirc_rx51.dev, ": lirc_register_driver failed: %d\n",
	lirc_rx51_driver.minor);
	return lirc_rx51_driver.minor;
	}

	return 0;
	}

	static int lirc_rx51_remove(struct platform_device *dev)
	{
	return lirc_unregister_driver(lirc_rx51_driver.minor);
	}

	static const struct of_device_id lirc_rx51_match[] = {
	{
	.compatible = "nokia,n900-ir",
	},
	{},
	};
	MODULE_DEVICE_TABLE(of, lirc_rx51_match);

	struct platform_driver lirc_rx51_platform_driver = {
	.probe = lirc_rx51_probe,
	.remove = lirc_rx51_remove,
	.suspend = lirc_rx51_suspend,
	.resume = lirc_rx51_resume,
	.driver = {
	.name = DRIVER_NAME,
	.of_match_table = of_match_ptr(lirc_rx51_match),
	},
	};
	module_platform_driver(lirc_rx51_platform_driver);

	MODULE_DESCRIPTION("LIRC TX driver for Nokia RX51");
	MODULE_AUTHOR("Nokia Corporation");
	MODULE_LICENSE("GPL");