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Commit 77523c5f authored Dec 27, 2013 by Jie Cheng

sensors: add enable and poll_delay handle for stk3x1x sensor drver



Add enable and poll_delay handle functions for the stk3x1x light and
proximity sensor driver. The system will create the general enable and
poll_delay handles in the "/sys/class/sensors/xxx/" for each sensor
drvier which is using the sensor class driver.

Change-Id: Ib082d3bbc278ef5c75ae38b3e702f84a13bca7a8
Signed-off-by: Jie Cheng <rockiec@codeaurora.org>

parent 3ae282c3

drivers/input/misc/stk3x1x.c

+86 −24

Original line number	Diff line number	Diff line
		@@ -190,9 +190,13 @@ static struct sensors_classdev sensors_light_cdev = {
		.max_range = "6500",
		.resolution = "0.0625",
		.sensor_power = "0.09",
		.min_delay = 0,
		.min_delay = (MIN_ALS_POLL_DELAY_NS / 1000), /* us */
		.fifo_reserved_event_count = 0,
		.fifo_max_event_count = 0,
		.enabled = 0,
		.delay_msec = 200,
		.sensors_enable = NULL,
		.sensors_poll_delay = NULL,
		};

		static struct sensors_classdev sensors_proximity_cdev = {
		@@ -207,6 +211,10 @@ static struct sensors_classdev sensors_proximity_cdev = {
		.min_delay = 0,
		.fifo_reserved_event_count = 0,
		.fifo_max_event_count = 0,
		.enabled = 0,
		.delay_msec = 200,
		.sensors_enable = NULL,
		.sensors_poll_delay = NULL,
		};

		struct data_filter {
		@@ -219,6 +227,8 @@ struct data_filter {
		struct stk3x1x_data {
		struct i2c_client *client;
		struct stk3x1x_platform_data *pdata;
		struct sensors_classdev als_cdev;
		struct sensors_classdev ps_cdev;
		#if (!defined(STK_POLL_PS) \|\| !defined(STK_POLL_ALS))
		int32_t irq;
		struct work_struct stk_work;
		@@ -903,6 +913,21 @@ static ssize_t stk_als_code_show(struct device dev, struct device_attribute at
		return scnprintf(buf, PAGE_SIZE, "%d\n", reading);
		}

		static ssize_t stk_als_enable_set(struct sensors_classdev *sensors_cdev,
		unsigned int enabled)
		{
		struct stk3x1x_data *als_data = container_of(sensors_cdev,
		struct stk3x1x_data, als_cdev);
		int err;

		mutex_lock(&als_data->io_lock);
		err = stk3x1x_enable_als(als_data, enabled);
		mutex_unlock(&als_data->io_lock);

		if (err < 0)
		return err;
		return 0;
		}

		static ssize_t stk_als_enable_show(struct device dev, struct device_attribute attr, char *buf)
		{
		@@ -1008,7 +1033,8 @@ static ssize_t stk_als_transmittance_store(struct device *dev, struct device_att
		static ssize_t stk_als_delay_show(struct device dev, struct device_attribute attr, char *buf)
		{
		struct stk3x1x_data *ps_data = dev_get_drvdata(dev);
		return scnprintf(buf, PAGE_SIZE, "%lld\n", ktime_to_ns(ps_data->als_poll_delay));
		return scnprintf(buf, PAGE_SIZE, "%u\n",
		(u32)ktime_to_ms(ps_data->als_poll_delay));
		}

		static inline void stk_als_delay_store_fir(struct stk3x1x_data *ps_data)
		@@ -1017,34 +1043,48 @@ static inline void stk_als_delay_store_fir(struct stk3x1x_data *ps_data)
		ps_data->fir.idx = 0;
		ps_data->fir.sum = 0;
		}

		static ssize_t stk_als_poll_delay_set(struct sensors_classdev *sensors_cdev,
		unsigned int delay_msec)
		{
		struct stk3x1x_data *als_data = container_of(sensors_cdev,
		struct stk3x1x_data, als_cdev);
		uint64_t value = 0;

		value = delay_msec * 1000000;

		if (value < MIN_ALS_POLL_DELAY_NS)
		value = MIN_ALS_POLL_DELAY_NS;

		mutex_lock(&als_data->io_lock);
		if (value != ktime_to_ns(als_data->als_poll_delay))
		als_data->als_poll_delay = ns_to_ktime(value);

		if (als_data->use_fir)
		stk_als_delay_store_fir(als_data);

		mutex_unlock(&als_data->io_lock);

		return 0;
		}

		static ssize_t stk_als_delay_store(struct device dev, struct device_attribute attr, const char *buf, size_t size)
		{
		uint64_t value = 0;
		int ret;
		struct stk3x1x_data *ps_data = dev_get_drvdata(dev);
		struct stk3x1x_data *als_data = dev_get_drvdata(dev);
		ret = kstrtoull(buf, 10, &value);
		if(ret < 0)
		{
		printk(KERN_ERR "%s:kstrtoull failed, ret=0x%x\n",
		__func__, ret);
		dev_err(dev, "%s:kstrtoull failed, ret=0x%x\n", __func__, ret);
		return ret;
		}
		#ifdef STK_DEBUG_PRINTF
		printk(KERN_INFO "%s: set als poll delay=%lld\n", __func__, value);
		dev_dbg(dev, "%s: set als poll delay=%lld\n", __func__, value);
		#endif
		if(value < MIN_ALS_POLL_DELAY_NS)
		{
		printk(KERN_ERR "%s: delay is too small\n", __func__);
		value = MIN_ALS_POLL_DELAY_NS;
		}
		mutex_lock(&ps_data->io_lock);
		if(value != ktime_to_ns(ps_data->als_poll_delay))
		ps_data->als_poll_delay = ns_to_ktime(value);

		if (ps_data->use_fir)
		stk_als_delay_store_fir(ps_data);

		mutex_unlock(&ps_data->io_lock);
		ret = stk_als_poll_delay_set(&als_data->als_cdev, value);
		if (ret < 0)
		return ret;
		return size;
		}

		@@ -1135,6 +1175,22 @@ static ssize_t stk_ps_code_show(struct device dev, struct device_attribute att
		return scnprintf(buf, PAGE_SIZE, "%d\n", reading);
		}

		static ssize_t stk_ps_enable_set(struct sensors_classdev *sensors_cdev,
		unsigned int enabled)
		{
		struct stk3x1x_data *ps_data = container_of(sensors_cdev,
		struct stk3x1x_data, ps_cdev);
		int err;

		mutex_lock(&ps_data->io_lock);
		err = stk3x1x_enable_ps(ps_data, enabled);
		mutex_unlock(&ps_data->io_lock);

		if (err < 0)
		return err;
		return 0;
		}

		static ssize_t stk_ps_enable_show(struct device dev, struct device_attribute attr, char *buf)
		{
		int32_t enable, ret;
		@@ -2394,10 +2450,16 @@ static int stk3x1x_probe(struct i2c_client *client,
		register_early_suspend(&ps_data->stk_early_suspend);
		#endif
		/* make sure everything is ok before registering the class device */
		err = sensors_classdev_register(&client->dev, &sensors_light_cdev);
		ps_data->als_cdev = sensors_light_cdev;
		ps_data->als_cdev.sensors_enable = stk_als_enable_set;
		ps_data->als_cdev.sensors_poll_delay = stk_als_poll_delay_set;
		err = sensors_classdev_register(&client->dev, &ps_data->als_cdev);
		if (err)
		goto err_power_on;
		err = sensors_classdev_register(&client->dev, &sensors_proximity_cdev);

		ps_data->ps_cdev = sensors_proximity_cdev;
		ps_data->ps_cdev.sensors_enable = stk_ps_enable_set;
		err = sensors_classdev_register(&client->dev, &ps_data->ps_cdev);
		if (err)
		goto err_class_sysfs;

		@@ -2411,9 +2473,9 @@ static int stk3x1x_probe(struct i2c_client *client,

		err_init_all_setting:
		stk3x1x_power_ctl(ps_data, false);
		sensors_classdev_unregister(&sensors_proximity_cdev);
		sensors_classdev_unregister(&ps_data->ps_cdev);
		err_class_sysfs:
		sensors_classdev_unregister(&sensors_light_cdev);
		sensors_classdev_unregister(&ps_data->als_cdev);
		err_power_on:
		stk3x1x_power_init(ps_data, false);
		err_power_init: