Aquaris-M10-4G/drivers/misc/mediatek/barometer/barometer.c

#include "inc/barometer.h"

struct baro_context *baro_context_obj = NULL;

static void initTimer(struct hrtimer *timer, enum hrtimer_restart (*callback)(struct hrtimer *))
{
	hrtimer_init(timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
	timer->function = callback;
}

static void startTimer(struct hrtimer *timer, int delay_ms, bool first)
{
	struct baro_context *obj = (struct baro_context *)container_of(timer, struct baro_context, hrTimer);

	if (obj == NULL) {
		BARO_ERR("NULL pointer\n");
		return;
	}

	if (first) {
		obj->target_ktime = ktime_add_ns(ktime_get(), (int64_t)delay_ms*1000000);
		/* BARO_ERR("cur_ns = %lld, first_target_ns = %lld\n",
			ktime_to_ns(ktime_get()), ktime_to_ns(obj->target_ktime)); */
	} else {
		do {
			obj->target_ktime = ktime_add_ns(obj->target_ktime, (int64_t)delay_ms*1000000);
		} while (ktime_to_ns(obj->target_ktime) < ktime_to_ns(ktime_get()));
		/* BARO_ERR("cur_ns = %lld, target_ns = %lld\n", ktime_to_ns(ktime_get()),
			ktime_to_ns(obj->target_ktime)); */
	}

	hrtimer_start(timer, obj->target_ktime, HRTIMER_MODE_ABS);
}

static void stopTimer(struct hrtimer *timer)
{
	hrtimer_cancel(timer);
}

static struct baro_init_info *barometer_init_list[MAX_CHOOSE_BARO_NUM] = { 0 };

static void baro_work_func(struct work_struct *work)
{

	struct baro_context *cxt = NULL;
	/* hwm_sensor_data sensor_data; */
	int value, status;
	int64_t pre_ns, cur_ns;
	int64_t delay_ms;
	struct timespec time;
	int err;

	cxt = baro_context_obj;
	delay_ms = atomic_read(&cxt->delay);

	if (NULL == cxt->baro_data.get_data)
		BARO_LOG("baro driver not register data path\n");

	time.tv_sec = time.tv_nsec = 0;
	get_monotonic_boottime(&time);
	cur_ns = time.tv_sec*1000000000LL+time.tv_nsec;

	/* add wake lock to make sure data can be read before system suspend */
	err = cxt->baro_data.get_data(&value, &status);

	if (err) {
		BARO_ERR("get baro data fails!!\n");
		goto baro_loop;
	} else {
		{
			cxt->drv_data.baro_data.values[0] = value;
			cxt->drv_data.baro_data.status = status;
			pre_ns = cxt->drv_data.baro_data.time;
			cxt->drv_data.baro_data.time = cur_ns;
		}
	}

	if (true == cxt->is_first_data_after_enable) {
		pre_ns = cur_ns;
		cxt->is_first_data_after_enable = false;
		/* filter -1 value */
		if (BARO_INVALID_VALUE == cxt->drv_data.baro_data.values[0]) {
			BARO_LOG(" read invalid data\n");
			goto baro_loop;

		}
	}
	/* report data to input device */
	/*BARO_LOG("new baro work run....\n"); */
	/*BARO_LOG("baro data[%d].\n", cxt->drv_data.baro_data.values[0]); */

	while ((cur_ns - pre_ns) >= delay_ms*1800000LL) {
		pre_ns += delay_ms*1000000LL;
		baro_data_report(cxt->idev,
			cxt->drv_data.baro_data.values[0],
			cxt->drv_data.baro_data.status, pre_ns);
	}

	baro_data_report(cxt->idev,
		cxt->drv_data.baro_data.values[0],
		cxt->drv_data.baro_data.status, cxt->drv_data.baro_data.time);

baro_loop:
	if (true == cxt->is_polling_run) {
		{
			startTimer(&cxt->hrTimer, atomic_read(&cxt->delay), false);
		}
	}
}

enum hrtimer_restart baro_poll(struct hrtimer *timer)
{
	struct baro_context *obj = (struct baro_context *)container_of(timer, struct baro_context, hrTimer);

	queue_work(obj->baro_workqueue, &obj->report);

	return HRTIMER_NORESTART;
}

static struct baro_context *baro_context_alloc_object(void)
{

	struct baro_context *obj = kzalloc(sizeof(*obj), GFP_KERNEL);

	BARO_LOG("baro_context_alloc_object++++\n");
	if (!obj) {
		BARO_ERR("Alloc baro object error!\n");
		return NULL;
	}
	atomic_set(&obj->delay, 200);	/*5Hz set work queue delay time 200 ms */
	atomic_set(&obj->wake, 0);
	INIT_WORK(&obj->report, baro_work_func);
	obj->baro_workqueue = NULL;
	obj->baro_workqueue = create_workqueue("baro_polling");
	if (!obj->baro_workqueue) {
		kfree(obj);
		return NULL;
	}
	initTimer(&obj->hrTimer, baro_poll);
	obj->is_first_data_after_enable = false;
	obj->is_polling_run = false;
	mutex_init(&obj->baro_op_mutex);
	obj->is_batch_enable = false;	/* for batch mode init */

	BARO_LOG("baro_context_alloc_object----\n");
	return obj;
}

static int baro_real_enable(int enable)
{
	int err = 0;
	struct baro_context *cxt = NULL;

	cxt = baro_context_obj;
	if (1 == enable) {

		if (true == cxt->is_active_data || true == cxt->is_active_nodata) {
			err = cxt->baro_ctl.enable_nodata(1);
			if (err) {
				err = cxt->baro_ctl.enable_nodata(1);
				if (err) {
					err = cxt->baro_ctl.enable_nodata(1);
					if (err)
						BARO_ERR("baro enable(%d) err 3 timers = %d\n",
							 enable, err);
				}
			}
			BARO_LOG("baro real enable\n");
		}

	}
	if (0 == enable) {
		if (false == cxt->is_active_data && false == cxt->is_active_nodata) {
			err = cxt->baro_ctl.enable_nodata(0);
			if (err)
				BARO_ERR("baro enable(%d) err = %d\n", enable, err);
			BARO_LOG("baro real disable\n");
		}

	}

	return err;
}

static int baro_enable_data(int enable)
{
	struct baro_context *cxt = NULL;

	cxt = baro_context_obj;
	if (NULL == cxt->baro_ctl.open_report_data) {
		BARO_ERR("no baro control path\n");
		return -1;
	}

	if (1 == enable) {
		BARO_LOG("BARO enable data\n");
		cxt->is_active_data = true;
		cxt->is_first_data_after_enable = true;
		cxt->baro_ctl.open_report_data(1);
		baro_real_enable(enable);
		if (false == cxt->is_polling_run && cxt->is_batch_enable == false) {
			if (false == cxt->baro_ctl.is_report_input_direct) {
				startTimer(&cxt->hrTimer, atomic_read(&cxt->delay), true);
				cxt->is_polling_run = true;
			}
		}
	}
	if (0 == enable) {
		BARO_LOG("BARO disable\n");
		cxt->is_active_data = false;
		cxt->baro_ctl.open_report_data(0);
		if (true == cxt->is_polling_run) {
			if (false == cxt->baro_ctl.is_report_input_direct) {
				cxt->is_polling_run = false;
				smp_mb();  /* for memory barrier */
				stopTimer(&cxt->hrTimer);
				smp_mb();  /* for memory barrier */
				cancel_work_sync(&cxt->report);
				cxt->drv_data.baro_data.values[0] = BARO_INVALID_VALUE;
			}
		}
		baro_real_enable(enable);
	}
	return 0;
}



int baro_enable_nodata(int enable)
{
	struct baro_context *cxt = NULL;

	cxt = baro_context_obj;
	if (NULL == cxt->baro_ctl.enable_nodata) {
		BARO_ERR("baro_enable_nodata:baro ctl path is NULL\n");
		return -1;
	}

	if (1 == enable)
		cxt->is_active_nodata = true;

	if (0 == enable)
		cxt->is_active_nodata = false;

	baro_real_enable(enable);
	return 0;
}


static ssize_t baro_show_enable_nodata(struct device *dev, struct device_attribute *attr, char *buf)
{
	int len = 0;

	BARO_LOG(" not support now\n");
	return len;
}

static ssize_t baro_store_enable_nodata(struct device *dev, struct device_attribute *attr,
					const char *buf, size_t count)
{
	struct baro_context *cxt = NULL;

	BARO_LOG("baro_store_enable nodata buf=%s\n", buf);
	mutex_lock(&baro_context_obj->baro_op_mutex);

	cxt = baro_context_obj;
	if (NULL == cxt->baro_ctl.enable_nodata) {
		BARO_LOG("baro_ctl enable nodata NULL\n");
		mutex_unlock(&baro_context_obj->baro_op_mutex);
		return count;
	}

	if (!strncmp(buf, "1", 1))
		baro_enable_nodata(1);
	else if (!strncmp(buf, "0", 1))
		baro_enable_nodata(0);
	else
		BARO_ERR(" baro_store enable nodata cmd error !!\n");

	mutex_unlock(&baro_context_obj->baro_op_mutex);

	return count;
}

static ssize_t baro_store_active(struct device *dev, struct device_attribute *attr,
				 const char *buf, size_t count)
{
	struct baro_context *cxt = NULL;

	BARO_LOG("baro_store_active buf=%s\n", buf);
	mutex_lock(&baro_context_obj->baro_op_mutex);

	cxt = baro_context_obj;
	if (NULL == cxt->baro_ctl.open_report_data) {
		BARO_LOG("baro_ctl enable NULL\n");
		mutex_unlock(&baro_context_obj->baro_op_mutex);
		return count;
	}
	if (!strncmp(buf, "1", 1))
		baro_enable_data(1);
	else if (!strncmp(buf, "0", 1))
		baro_enable_data(0);
	else
		BARO_ERR(" baro_store_active error !!\n");

	mutex_unlock(&baro_context_obj->baro_op_mutex);
	BARO_LOG(" baro_store_active done\n");
	return count;
}

/*----------------------------------------------------------------------------*/
static ssize_t baro_show_active(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct baro_context *cxt = NULL;
	int div;

	cxt = baro_context_obj;
	div = cxt->baro_data.vender_div;

	BARO_LOG("baro vender_div value: %d\n", div);
	return snprintf(buf, PAGE_SIZE, "%d\n", div);
}

static ssize_t baro_store_delay(struct device *dev, struct device_attribute *attr,
				const char *buf, size_t count)
{
	int64_t delay;
	int64_t mdelay = 0;
	int ret = 0;
	struct baro_context *cxt = NULL;

	mutex_lock(&baro_context_obj->baro_op_mutex);

	cxt = baro_context_obj;
	if (NULL == cxt->baro_ctl.set_delay) {
		BARO_LOG("baro_ctl set_delay NULL\n");
		mutex_unlock(&baro_context_obj->baro_op_mutex);
		return count;
	}

	ret = kstrtoll(buf, 10, &delay);
	if (ret != 0) {
		BARO_ERR("invalid format!!\n");
		mutex_unlock(&baro_context_obj->baro_op_mutex);
		return count;
	}

	if (false == cxt->baro_ctl.is_report_input_direct) {
		mdelay = delay;
		do_div(mdelay, 1000000);
		atomic_set(&baro_context_obj->delay, mdelay);
	}
	cxt->baro_ctl.set_delay(delay);
	BARO_LOG(" baro_delay %lld ns\n", delay);
	mutex_unlock(&baro_context_obj->baro_op_mutex);
	return count;

}

static ssize_t baro_show_delay(struct device *dev, struct device_attribute *attr, char *buf)
{
	int len = 0;

	BARO_LOG(" not support now\n");
	return len;
}


static ssize_t baro_store_batch(struct device *dev, struct device_attribute *attr,
				const char *buf, size_t count)
{
	struct baro_context *cxt = NULL;

	BARO_LOG("baro_store_batch buf=%s\n", buf);
	mutex_lock(&baro_context_obj->baro_op_mutex);

	cxt = baro_context_obj;

	if (!strncmp(buf, "1", 1)) {
		cxt->is_batch_enable = true;
		if (true == cxt->is_polling_run) {
			cxt->is_polling_run = false;
			smp_mb();  /* for memory barrier */
			stopTimer(&cxt->hrTimer);
			smp_mb();  /* for memory barrier */
			cancel_work_sync(&cxt->report);
			cxt->drv_data.baro_data.values[0] = BARO_INVALID_VALUE;
			cxt->drv_data.baro_data.values[1] = BARO_INVALID_VALUE;
			cxt->drv_data.baro_data.values[2] = BARO_INVALID_VALUE;
		}
	} else if (!strncmp(buf, "0", 1)) {
		cxt->is_batch_enable = false;
		if (false == cxt->is_polling_run) {
			if (false == cxt->baro_ctl.is_report_input_direct && true == cxt->is_active_data) {
				startTimer(&cxt->hrTimer, atomic_read(&cxt->delay), true);
				cxt->is_polling_run = true;
			}
		}
	} else {
		BARO_ERR(" baro_store_batch error !!\n");
	}
	mutex_unlock(&baro_context_obj->baro_op_mutex);
	BARO_LOG(" baro_store_batch done: %d\n", cxt->is_batch_enable);
	return count;

}

static ssize_t baro_show_batch(struct device *dev, struct device_attribute *attr, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%d\n", 0);
}

static ssize_t baro_store_flush(struct device *dev, struct device_attribute *attr,
				const char *buf, size_t count)
{
	mutex_lock(&baro_context_obj->baro_op_mutex);
	/* struct baro_context *devobj = (struct baro_context*)dev_get_drvdata(dev); */
	/* do read FIFO data function and report data immediately */
	mutex_unlock(&baro_context_obj->baro_op_mutex);
	return count;
}

static ssize_t baro_show_flush(struct device *dev, struct device_attribute *attr, char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%d\n", 0);
}

static ssize_t baro_show_devnum(struct device *dev, struct device_attribute *attr, char *buf)
{
	const char *devname = NULL;

	devname = dev_name(&baro_context_obj->idev->dev);
	return snprintf(buf, PAGE_SIZE, "%s\n", devname + 5);
}

static int barometer_remove(struct platform_device *pdev)
{
	BARO_LOG("barometer_remove\n");
	return 0;
}

static int barometer_probe(struct platform_device *pdev)
{
	BARO_LOG("barometer_probe\n");
	return 0;
}

#ifdef CONFIG_OF
static const struct of_device_id barometer_of_match[] = {
	{.compatible = "mediatek,barometer",},
	{},
};
#endif

static struct platform_driver barometer_driver = {
	.probe = barometer_probe,
	.remove = barometer_remove,
	.driver = {
		   .name = "barometer",
#ifdef CONFIG_OF
		   .of_match_table = barometer_of_match,
#endif
		   }
};

static int baro_real_driver_init(void)
{
	int i = 0;
	int err = 0;

	BARO_LOG(" baro_real_driver_init +\n");
	for (i = 0; i < MAX_CHOOSE_BARO_NUM; i++) {
		BARO_LOG(" i=%d\n", i);
		if (0 != barometer_init_list[i]) {
			BARO_LOG(" baro try to init driver %s\n", barometer_init_list[i]->name);
			err = barometer_init_list[i]->init();
			if (0 == err) {
				BARO_LOG(" baro real driver %s probe ok\n",
					 barometer_init_list[i]->name);
				break;
			}
		}
	}

	if (i == MAX_CHOOSE_BARO_NUM) {
		BARO_LOG(" baro_real_driver_init fail\n");
		err = -1;
	}
	return err;
}

int baro_driver_add(struct baro_init_info *obj)
{
	int err = 0;
	int i = 0;

	BARO_FUN();
	if (!obj) {
		BARO_ERR("BARO driver add fail, baro_init_info is NULL\n");
		return -1;
	}

	for (i = 0; i < MAX_CHOOSE_BARO_NUM; i++) {
		if (i == 0) {
			BARO_LOG("register barometer driver for the first time\n");
			if (platform_driver_register(&barometer_driver))
				BARO_ERR("failed to register gensor driver already exist\n");
		}

		if (NULL == barometer_init_list[i]) {
			obj->platform_diver_addr = &barometer_driver;
			barometer_init_list[i] = obj;
			break;
		}
	}
	if (i >= MAX_CHOOSE_BARO_NUM) {
		BARO_ERR("BARO driver add err\n");
		err = -1;
	}

	return err;
} EXPORT_SYMBOL_GPL(baro_driver_add);

static int baro_misc_init(struct baro_context *cxt)
{

	int err = 0;

	cxt->mdev.minor = MISC_DYNAMIC_MINOR;
	cxt->mdev.name = BARO_MISC_DEV_NAME;

	err = misc_register(&cxt->mdev);
	if (err)
		BARO_ERR("unable to register baro misc device!!\n");

	return err;
}

static void baro_input_destroy(struct baro_context *cxt)
{
	struct input_dev *dev = cxt->idev;

	input_unregister_device(dev);
	input_free_device(dev);
}

static int baro_input_init(struct baro_context *cxt)
{
	struct input_dev *dev;
	int err = 0;

	dev = input_allocate_device();
	if (NULL == dev)
		return -ENOMEM;

	dev->name = BARO_INPUTDEV_NAME;

	set_bit(EV_REL, dev->evbit);
	input_set_capability(dev, EV_REL, EVENT_TYPE_BARO_VALUE);
	input_set_capability(dev, EV_ABS, EVENT_TYPE_BARO_STATUS);
	input_set_capability(dev, EV_REL, EVENT_TYPE_BARO_TIMESTAMP_HI);
	input_set_capability(dev, EV_REL, EVENT_TYPE_BARO_TIMESTAMP_LO);

	/* input_set_abs_params(dev, EVENT_TYPE_BARO_VALUE, BARO_VALUE_MIN, BARO_VALUE_MAX, 0, 0); */
	input_set_abs_params(dev, EVENT_TYPE_BARO_STATUS, BARO_STATUS_MIN, BARO_STATUS_MAX, 0, 0);
	input_set_drvdata(dev, cxt);

	err = input_register_device(dev);
	if (err < 0) {
		input_free_device(dev);
		return err;
	}
	cxt->idev = dev;

	return 0;
}

DEVICE_ATTR(baroenablenodata, S_IWUSR | S_IRUGO, baro_show_enable_nodata, baro_store_enable_nodata);
DEVICE_ATTR(baroactive, S_IWUSR | S_IRUGO, baro_show_active, baro_store_active);
DEVICE_ATTR(barodelay, S_IWUSR | S_IRUGO, baro_show_delay, baro_store_delay);
DEVICE_ATTR(barobatch, S_IWUSR | S_IRUGO, baro_show_batch, baro_store_batch);
DEVICE_ATTR(baroflush, S_IWUSR | S_IRUGO, baro_show_flush, baro_store_flush);
DEVICE_ATTR(barodevnum, S_IWUSR | S_IRUGO, baro_show_devnum, NULL);


static struct attribute *baro_attributes[] = {
	&dev_attr_baroenablenodata.attr,
	&dev_attr_baroactive.attr,
	&dev_attr_barodelay.attr,
	&dev_attr_barobatch.attr,
	&dev_attr_baroflush.attr,
	&dev_attr_barodevnum.attr,
	NULL
};

static struct attribute_group baro_attribute_group = {
	.attrs = baro_attributes
};

int baro_register_data_path(struct baro_data_path *data)
{
	struct baro_context *cxt = NULL;

	cxt = baro_context_obj;
	cxt->baro_data.get_data = data->get_data;
	cxt->baro_data.vender_div = data->vender_div;
	cxt->baro_data.get_raw_data = data->get_raw_data;
	BARO_LOG("baro register data path vender_div: %d\n", cxt->baro_data.vender_div);
	if (NULL == cxt->baro_data.get_data) {
		BARO_LOG("baro register data path fail\n");
		return -1;
	}
	return 0;
}

int baro_register_control_path(struct baro_control_path *ctl)
{
	struct baro_context *cxt = NULL;
	int err = 0;

	cxt = baro_context_obj;
	cxt->baro_ctl.set_delay = ctl->set_delay;
	cxt->baro_ctl.open_report_data = ctl->open_report_data;
	cxt->baro_ctl.enable_nodata = ctl->enable_nodata;
	cxt->baro_ctl.is_support_batch = ctl->is_support_batch;
	cxt->baro_ctl.is_report_input_direct = ctl->is_report_input_direct;
	cxt->baro_ctl.is_support_batch = ctl->is_support_batch;
	cxt->baro_ctl.is_use_common_factory = ctl->is_use_common_factory;

	if (NULL == cxt->baro_ctl.set_delay || NULL == cxt->baro_ctl.open_report_data
	    || NULL == cxt->baro_ctl.enable_nodata) {
		BARO_LOG("baro register control path fail\n");
		return -1;
	}

	/* add misc dev for sensor hal control cmd */
	err = baro_misc_init(baro_context_obj);
	if (err) {
		BARO_ERR("unable to register baro misc device!!\n");
		return -2;
	}
	err = sysfs_create_group(&baro_context_obj->mdev.this_device->kobj, &baro_attribute_group);
	if (err < 0) {
		BARO_ERR("unable to create baro attribute file\n");
		return -3;
	}

	kobject_uevent(&baro_context_obj->mdev.this_device->kobj, KOBJ_ADD);

	return 0;
}

int baro_data_report(struct input_dev *dev, int value, int status, int64_t nt)
{
	/* BARO_LOG("+baro_data_report! %d, %d, %d, %d\n",x,y,z,status); */
	input_report_rel(dev, EVENT_TYPE_BARO_VALUE, value);
	input_report_abs(dev, EVENT_TYPE_BARO_STATUS, status);
	input_report_rel(dev, EVENT_TYPE_BARO_TIMESTAMP_HI, nt >> 32);
	input_report_rel(dev, EVENT_TYPE_BARO_TIMESTAMP_LO, nt & 0xFFFFFFFFLL);
	input_sync(dev);

	return 0;
}

static int baro_probe(struct platform_device *pdev)
{

	int err;

	BARO_LOG("+++++++++++++baro_probe!!\n");

	baro_context_obj = baro_context_alloc_object();
	if (!baro_context_obj) {
		err = -ENOMEM;
		BARO_ERR("unable to allocate devobj!\n");
		goto exit_alloc_data_failed;
	}

	/* init real baro driver */
	err = baro_real_driver_init();
	if (err) {
		BARO_ERR("baro real driver init fail\n");
		goto real_driver_init_fail;
	}

	/* init baro common factory mode misc device */
	err = baro_factory_device_init();
	if (err)
		BARO_ERR("baro factory device already registed\n");

	/* init input dev */
	err = baro_input_init(baro_context_obj);
	if (err) {
		BARO_ERR("unable to register baro input device!\n");
		goto exit_alloc_input_dev_failed;
	}

	BARO_LOG("----baro_probe OK !!\n");
	return 0;

	/* exit_hwmsen_create_attr_failed: */
	/* exit_misc_register_failed: */

	/* exit_err_sysfs: */

	if (err) {
		BARO_ERR("sysfs node creation error\n");
		baro_input_destroy(baro_context_obj);
	}

real_driver_init_fail:
exit_alloc_input_dev_failed:
	kfree(baro_context_obj);
	baro_context_obj = NULL;
exit_alloc_data_failed:


	BARO_LOG("----baro_probe fail !!!\n");
	return err;
}



static int baro_remove(struct platform_device *pdev)
{
	int err = 0;

	BARO_FUN(f);

	input_unregister_device(baro_context_obj->idev);
	sysfs_remove_group(&baro_context_obj->idev->dev.kobj, &baro_attribute_group);

	err = misc_deregister(&baro_context_obj->mdev);
	if (err)
		BARO_ERR("misc_deregister fail: %d\n", err);
	kfree(baro_context_obj);

	return 0;
}

static int baro_suspend(struct platform_device *dev, pm_message_t state)
{
	return 0;
}

/*----------------------------------------------------------------------------*/
static int baro_resume(struct platform_device *dev)
{
	return 0;
}

#ifdef CONFIG_OF
static const struct of_device_id m_baro_pl_of_match[] = {
	{.compatible = "mediatek,m_baro_pl",},
	{},
};
#endif

static struct platform_driver baro_driver = {
	.probe = baro_probe,
	.remove = baro_remove,
	.suspend = baro_suspend,
	.resume = baro_resume,
	.driver = {
		   .name = BARO_PL_DEV_NAME,
#ifdef CONFIG_OF
		   .of_match_table = m_baro_pl_of_match,
#endif
		   }
};

static int __init baro_init(void)
{
	BARO_FUN();

	if (platform_driver_register(&baro_driver)) {
		BARO_ERR("failed to register baro driver\n");
		return -ENODEV;
	}

	return 0;
}

static void __exit baro_exit(void)
{
	platform_driver_unregister(&baro_driver);
	platform_driver_unregister(&barometer_driver);
}

late_initcall(baro_init);
/* module_init(baro_init); */
/* module_exit(baro_exit); */
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("BAROMETER device driver");
MODULE_AUTHOR("Mediatek");