[PATCH V1] TAOS tsl2x7x

* [PATCH V1] TAOS tsl2x7x
@ 2012-02-10 19:06 ` Jon Brenner
  0 siblings, 0 replies; 4+ messages in thread
From: Jon Brenner @ 2012-02-10 19:06 UTC (permalink / raw)
  To: Jonathan Cameron; +Cc: linux-kernel, linux-iio

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TAOS device driver for tsl/tmd 2771 and 2772 device families (inc all variants).

Signed-off-by: Jon Brenner <jbrenner@taosinc.com>

---
 .../iio/Documentation/sysfs-bus-iio-light-tsl2x7x  |   71 +
 drivers/staging/iio/light/Kconfig                  |   11 +
 drivers/staging/iio/light/Makefile                 |    1 +
 drivers/staging/iio/light/tsl2x7x_core.c           | 2053 ++++++++++++++++++++
 drivers/staging/iio/light/tsl2x7x_core.h           |  138 ++
 5 files changed, 2274 insertions(+), 0 deletions(-)

diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-light-tsl2x7x b/drivers/staging/iio/Documentation/sysfs-bus-iio-light-tsl2x7x
new file mode 100644
index 0000000..f1bb5f5
--- /dev/null
+++ b/drivers/staging/iio/Documentation/sysfs-bus-iio-light-tsl2x7x
@@ -0,0 +1,71 @@
+What:		/sys/bus/iio/devices/device[n]/lux_table
+KernelVersion:	2.6.37
+Contact:	linux-iio@vger.kernel.org
+Description:
+		This property gets/sets the table of coefficients
+		used in calculating illuminance in lux.
+
+What:		/sys/bus/iio/devices/device[n]/illuminance0_calibrate
+KernelVersion:	2.6.37
+Contact:	linux-iio@vger.kernel.org
+Description:
+		This property causes an internal calibration of the als gain trim
+		value which is later used in calculating illuminance in lux.
+
+What:		/sys/bus/iio/devices/device[n]/illuminance0_thresh_falling_value
+KernelVersion:	3.3-rc1
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Low (falling) trigger point for the internal ALS comparison
+		function for interrupt generation.
+
+What:		/sys/bus/iio/devices/device[n]/illuminance0_thresh_rising_value
+KernelVersion:	3.3-rc1
+Contact:	linux-iio@vger.kernel.org
+Description:
+		high (rising) trigger point for the internal ALS comparison
+		function for interrupt generation.
+
+What:		/sys/bus/iio/devices/device[n]/illuminance0_both_raw
+KernelVersion:	3.3-rc1
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Simultainious ALS channel 1 and channel 2 data represented as
+		a 32 bit integer.
+
+What:		/sys/bus/iio/devices/device[n]/proximity_calibrate
+KernelVersion:	3.3-rc1
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Causes an recalculation and adjustment to the
+		proximity_thresh_rising_value.
+
+What:		/sys/bus/iio/devices/device[n]/proximity_thresh_falling_value
+KernelVersion:	3.3-rc1
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Low (falling) trigger point for the internal proximity comparison
+		function for interrupt generation.
+
+What:		/sys/bus/iio/devices/device[n]/proximity_thresh_rising_value
+KernelVersion:	3.3-rc1
+Contact:	linux-iio@vger.kernel.org
+Description:
+		high (rising) trigger point for the internal proximity comparison
+		function for interrupt generation.
+
+What:		/sys/bus/iio/devices/device[n]/proximity_calibscale
+KernelVersion:	3.3-rc1
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Hardware or software applied calibration scale factor assumed
+		to account for attenuation due to industrial design (glass
+		filters or aperture holes).
+
+What:		/sys/bus/iio/devices/device[n]/proximity_raw
+KernelVersion:	3.3-rc1
+Contact:	linux-iio@vger.kernel.org
+Description:
+		State of proximity detection based on the
+		proximity_thresh_rising_value.
+
diff --git a/drivers/staging/iio/light/Kconfig b/drivers/staging/iio/light/Kconfig
index e7e9159..29de333 100644
--- a/drivers/staging/iio/light/Kconfig
+++ b/drivers/staging/iio/light/Kconfig
@@ -31,4 +31,15 @@ config TSL2583
 	 Provides support for the TAOS tsl2580, tsl2581 and tsl2583 devices.
 	 Access ALS data via iio, sysfs.

+	 This driver can also be built as a module.  If so, the module
+	 will be called tsl2583.
+
+config TSL2x7x
+	tristate "TAOS TSL/TMD2x71 and TSL/TMD2x72 Family of light and proximity sensors"
+	depends on I2C
+	help
+	 Support for: tsl2571, tsl2671, tmd2671, tsl2771, tmd2771, tsl2572, tsl2672,
+	 tmd2672, tsl2772, tmd2772 devices.
+	 Provides iio_events and direct access via sysfs.
+
 endmenu
diff --git a/drivers/staging/iio/light/Makefile b/drivers/staging/iio/light/Makefile
index 3011fbf..ff12c4b 100644
--- a/drivers/staging/iio/light/Makefile
+++ b/drivers/staging/iio/light/Makefile
@@ -5,3 +5,4 @@
 obj-$(CONFIG_SENSORS_TSL2563)	+= tsl2563.o
 obj-$(CONFIG_SENSORS_ISL29018)	+= isl29018.o
 obj-$(CONFIG_TSL2583)	+= tsl2583.o
+obj-$(CONFIG_TSL2x7x)	+= tsl2x7x_core.o
diff --git a/drivers/staging/iio/light/tsl2x7x_core.c b/drivers/staging/iio/light/tsl2x7x_core.c
new file mode 100644
index 0000000..671f476
--- /dev/null
+++ b/drivers/staging/iio/light/tsl2x7x_core.c
@@ -0,0 +1,2053 @@
+/*
+ * Device driver for monitoring ambient light intensity in (lux)
+ * and proximity detection (prox) within the TAOS TSL2X7X family of devices.
+ *
+ * Copyright (c) 2012, TAOS 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/kernel.h>
+#include <linux/i2c.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/mutex.h>
+#include <linux/unistd.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/slab.h>
+#include <linux/pm.h>
+#include <linux/module.h>
+#include <linux/version.h>
+
+#include <linux/cdev.h>
+#include <linux/stat.h>
+#include <linux/module.h>
+#include "tsl2x7x_core.h"
+#include "../events.h"
+#include "../buffer.h"
+#include "../iio.h"
+#include "../sysfs.h"
+
+/* Cal defs*/
+#define PROX_STAT_CAL        0
+#define PROX_STAT_SAMP       1
+#define MAX_SAMPLES_CAL      200
+
+/* TSL2X7X Device ID */
+#define TRITON_ID    0x00
+#define SWORDFISH_ID 0x30
+#define HALIBUT_ID   0x20
+
+/* Lux calculation constants */
+#define TSL2X7X_LUX_CALC_OVER_FLOW        65535
+
+/* TAOS txx2x7x Device family members */
+enum {
+	tsl2571,
+	tsl2671,
+	tmd2671,
+	tsl2771,
+	tmd2771,
+	tsl2572,
+	tsl2672,
+	tmd2672,
+	tsl2772,
+	tmd2772
+};
+
+enum {
+	TSL2X7X_CHIP_UNKNOWN = 0,
+	TSL2X7X_CHIP_WORKING = 1,
+	TSL2X7X_CHIP_SUSPENDED = 2
+};
+
+/* Per-device data */
+struct tsl2x7x_als_info {
+	u16 als_ch0;
+	u16 als_ch1;
+	u16 lux;
+};
+
+/* proximity data */
+struct tsl2x7x_prox_info {
+	u16 prox_data;
+	int prox_event;
+};
+
+struct prox_stat {
+	u16 min;
+	u16 max;
+	u16 mean;
+	unsigned long stddev;
+};
+
+struct tsl2x7x_settings {
+	int als_time;
+	int als_gain;
+	int als_gain_trim;
+	int wait_time;
+	int prx_time;
+	int prox_gain;
+	int prox_config;
+	int als_cal_target;
+	u8  interrupts_en;
+	u8  als_persistence;
+	int als_thresh_low;
+	int als_thresh_high;
+	int prox_thres_low;
+	int prox_thres_high;
+	int prox_pulse_count;
+	int prox_max_samples_cal;/* for calibration mode*/
+
+};
+
+struct tsl2X7X_chip_info {
+	struct iio_chan_spec	channel[0];
+	const struct iio_info	*info;
+};
+
+struct tsl2X7X_chip {
+	kernel_ulong_t id;
+	struct mutex prox_mutex;
+	struct mutex als_mutex;
+	struct i2c_client *client;
+	struct iio_dev *iio_dev;
+	struct tsl2x7x_prox_info prox_cur_info;
+	struct tsl2x7x_als_info als_cur_info;
+	struct tsl2x7x_settings tsl2x7x_settings;
+	struct tsl2X7X_platform_data *pdata;
+	int als_time_scale;
+	int als_saturation;
+	int tsl2x7x_chip_status;
+	u8 tsl2x7x_config[TSL2X7X_REG_MAX];
+	bool init_done;
+	struct work_struct work_thresh;
+	s64 event_timestamp;
+	/* This structure is intentionally large to accommodate
+	 * updates via sysfs. */
+	/* Sized to 9 = max 8 segments + 1 termination segment */
+	/* Assumption is one and only one type of glass used  */
+	struct tsl2x7x_lux tsl2x7x_device_lux[MAX_TABLE_SIZE];
+};
+
+/* Different devices require different coefficents */
+static const struct tsl2x7x_lux tsl2x71_lux_table[] = {
+	{ 14461,   611,   1211 },
+	{ 18540,   352,    623 },
+	{     0,     0,      0 },
+};
+
+static const struct tsl2x7x_lux tmd2x71_lux_table[] = {
+	{ 11635,   115,    256 },
+	{ 15536,    87,    179 },
+	{     0,     0,      0 },
+};
+
+static const struct tsl2x7x_lux tsl2x72_lux_table[] = {
+	{ 14013,   466,   917 },
+	{ 18222,   310,   552 },
+	{     0,     0,     0 },
+};
+
+static const struct tsl2x7x_lux tmd2x72_lux_table[] = {
+	{ 13218,   130,   262 },
+	{ 17592,   92,    169 },
+	{     0,     0,     0 },
+};
+
+static const struct tsl2x7x_lux *tsl2x7x_default_lux_table_group[] = {
+	[tsl2571] = tsl2x71_lux_table,
+	[tsl2671] =	tsl2x71_lux_table,
+	[tmd2671] =	tmd2x71_lux_table,
+	[tsl2771] =	tsl2x71_lux_table,
+	[tmd2771] =	tmd2x71_lux_table,
+	[tsl2572] =	tsl2x72_lux_table,
+	[tsl2672] =	tsl2x72_lux_table,
+	[tmd2672] = tmd2x72_lux_table,
+	[tsl2772] =	tsl2x72_lux_table,
+	[tmd2772] =	tmd2x72_lux_table,
+};
+
+struct als_gainadj {
+	s16 ch0;
+	s16 ch1;
+};
+
+/* Used to validate the ALS gain selection index */
+static const struct als_gainadj tsl2X7X_als_gainadj[] = {
+	{ 1, 1 },
+	{ 8, 8 },
+	{ 16, 16 },
+	{ 120, 120 }
+};
+
+
+/* Not using channels */
+static const struct iio_chan_spec tsl2X7X_channels[] = {};
+
+/*
+ * Read a number of bytes starting at register (reg) location.
+ * Return 0, or i2c_smbus_write_byte ERROR code.
+ */
+static int
+tsl2x7x_i2c_read(struct i2c_client *client, u8 reg, u8 *val, unsigned int len)
+{
+	int ret;
+	int i;
+
+	for (i = 0; i < len; i++) {
+		/* select register to write */
+		ret = i2c_smbus_write_byte(client, (TSL2X7X_CMD_REG | reg));
+		if (ret < 0) {
+			dev_err(&client->dev, "tsl2x7x_i2c_read failed to write"
+				" register %x\n", reg);
+			return ret;
+		}
+		/* read the data */
+		*val = i2c_smbus_read_byte(client);
+		val++;
+		reg++;
+	}
+	return 0;
+}
+
+/*
+ * Reads and calculates current lux value.
+ * The raw ch0 and ch1 values of the ambient light sensed in the last
+ * integration cycle are read from the device.
+ * Time scale factor array values are adjusted based on the integration time.
+ * The raw values are multiplied by a scale factor, and device gain is obtained
+ * using gain index. Limit checks are done next, then the ratio of a multiple
+ * of ch1 value, to the ch0 value, is calculated. The array tsl2x7x_device_lux[]
+ * declared above is then scanned to find the first ratio value that is just
+ * above the ratio we just calculated. The ch0 and ch1 multiplier constants in
+ * the array are then used along with the time scale factor array values, to
+ * calculate the lux.
+ */
+static int tsl2x7x_get_lux(struct iio_dev *indio_dev)
+{
+	u16 ch0, ch1; /* separated ch0/ch1 data from device */
+	u32 lux; /* raw lux calculated from device data */
+	u64 lux64;
+	u32 ratio;
+#pragma pack(4)
+	u8 buf[4];
+	struct tsl2x7x_lux *p;
+	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+	int i, ret;
+	u32 ch0lux = 0;
+	u32 ch1lux = 0;
+
+	if (mutex_trylock(&chip->als_mutex) == 0) {
+		dev_info(&chip->client->dev, "tsl2x7x_get_lux device is busy\n");
+		return chip->als_cur_info.lux; /* busy, so return LAST VALUE */
+	}
+
+	if (chip->tsl2x7x_chip_status != TSL2X7X_CHIP_WORKING) {
+		/* device is not enabled */
+		dev_err(&chip->client->dev, "tsl2x7x_get_lux device is not enabled\n");
+		ret = -EBUSY ;
+		goto out_unlock;
+	}
+
+	ret = tsl2x7x_i2c_read(chip->client,
+		(TSL2X7X_CMD_REG | TSL2X7X_STATUS), &buf[0], 1);
+	if (ret < 0) {
+		dev_err(&chip->client->dev,
+			"tsl2x7x_get_lux failed to read CMD_REG\n");
+		goto out_unlock;
+	}
+	/* is data new & valid */
+	if (!(buf[0] & TSL2X7X_STA_ADC_VALID)) {
+		dev_err(&chip->client->dev,
+			"tsl2x7x_get_lux data not valid yet\n");
+		ret = chip->als_cur_info.lux; /* return LAST VALUE */
+		goto out_unlock;
+	}
+
+	for (i = 0; i < 4; i++) {
+		ret = tsl2x7x_i2c_read(chip->client,
+			(TSL2X7X_CMD_REG | (TSL2X7X_ALS_CHAN0LO + i)),
+			&buf[i], 1);
+		if (ret < 0) {
+			dev_err(&chip->client->dev,
+				"tsl2x7x_get_lux failed to read"
+				" ret: %x\n", ret);
+			goto out_unlock;
+		}
+	}
+
+	/* clear status, really interrupt status ( are off),
+	but we use the bit anyway */
+	ret = i2c_smbus_write_byte(chip->client,
+		(TSL2X7X_CMD_REG |
+				TSL2X7X_CMD_SPL_FN |
+				TSL2X7X_CMD_ALS_INT_CLR));
+
+	if (ret < 0) {
+		dev_err(&chip->client->dev,
+		"tsl2x7x_i2c_write_command failed in tsl2x7x_get_lux, err = %d\n",
+			ret);
+		goto out_unlock; /* have no data, so return failure */
+	}
+
+	/* extract ALS/lux data */
+	ch0 = le16_to_cpup((const __le16 *)&buf[0]);
+	ch1 = le16_to_cpup((const __le16 *)&buf[2]);
+
+	chip->als_cur_info.als_ch0 = ch0;
+	chip->als_cur_info.als_ch1 = ch1;
+
+	if ((ch0 >= chip->als_saturation) || (ch1 >= chip->als_saturation))
+		goto return_max;
+
+	if (ch0 == 0) {
+		/* have no data, so return LAST VALUE */
+		ret = chip->als_cur_info.lux = 0;
+		goto out_unlock;
+	}
+	/* calculate ratio */
+	ratio = (ch1 << 15) / ch0;
+	/* convert to unscaled lux using the pointer to the table */
+	for (p = (struct tsl2x7x_lux *) chip->tsl2x7x_device_lux;
+	     p->ratio != 0 && p->ratio < ratio; p++)
+		;
+
+	if (p->ratio == 0) {
+		lux = 0;
+	} else {
+		ch0lux = ((ch0 * p->ch0) +
+		(tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain].ch0 >> 1))
+		/ tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain].ch0;
+
+		ch1lux = ((ch1 * p->ch1) +
+		(tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain].ch1 >> 1))
+		/ tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain].ch1;
+
+		lux = ch0lux - ch1lux;
+	}
+
+	/* note: lux is 31 bit max at this point */
+	if (ch1lux > ch0lux) {
+		dev_dbg(&chip->client->dev, "No Data - Return last value\n");
+		ret = chip->als_cur_info.lux = 0;
+		goto out_unlock;
+	}
+
+	/* adjust for active time scale */
+	if (chip->als_time_scale == 0)
+		lux = 0;
+	else
+		lux = (lux + (chip->als_time_scale >> 1)) /
+			chip->als_time_scale;
+
+	/* adjust for active gain scale
+	 * The tsl2x7x_device_lux tables have a factor of 256 built-in.
+	 * User-specified gain provides a multiplier.
+	 * Apply user-specified gain before shifting right to retain precision.
+	 * Use 64 bits to avoid overflow on multiplication.
+	 * Then go back to 32 bits before division to avoid using div_u64().
+	 */
+	lux64 = lux;
+	lux64 = lux64 * chip->tsl2x7x_settings.als_gain_trim;
+	lux64 >>= 8;
+	lux = lux64;
+	lux = (lux + 500) / 1000;
+
+	if (lux > TSL2X7X_LUX_CALC_OVER_FLOW) { /* check for overflow */
+return_max:
+		lux = TSL2X7X_LUX_CALC_OVER_FLOW;
+	}
+
+	/* Update the structure with the latest VALID lux. */
+	chip->als_cur_info.lux = lux;
+	ret = lux;
+
+out_unlock:
+	mutex_unlock(&chip->als_mutex);
+	return ret;
+
+}
+
+/*
+ * Proximity poll function - if valid data is available, read and form the ch0
+ * and prox data values, check for limits on the ch0 value, and check the prox
+ * data against the current thresholds, to set the event status accordingly.
+ */
+static int tsl2x7x_prox_poll(struct iio_dev *indio_dev)
+{
+#define CONSECUTIVE_RETRIES 50
+
+	int i;
+	int ret;
+	u8 status;
+	u8 chdata[2];
+	int err_cnt;
+	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+
+	if (mutex_trylock(&chip->prox_mutex) == 0) {
+		dev_err(&chip->client->dev, "Can't get prox mutex\n");
+		return -EBUSY;
+	}
+
+	err_cnt = 0;
+
+try_again:
+	ret = tsl2x7x_i2c_read(chip->client,
+		(TSL2X7X_CMD_REG | TSL2X7X_STATUS), &status, 1);
+	if (ret < 0) {
+		dev_err(&chip->client->dev,
+			"Read regs failed in tsl2x7x_prox_poll() - A\n");
+		mutex_unlock(&chip->prox_mutex);
+		return ret;
+	}
+
+	/*Prox interrupt asserted*/
+	if (((chip->tsl2x7x_settings.interrupts_en << 4)
+			& CNTL_PROX_INT_ENBL)) {
+		if (!(status & TSL2X7X_STA_ADC_VALID)) {
+			err_cnt++;
+			if (err_cnt > CONSECUTIVE_RETRIES) {
+				mutex_unlock(&chip->prox_mutex);
+				dev_err(&chip->client->dev,
+				"Consec. retries exceeded\n");
+				return chip->prox_cur_info.prox_event;
+			}
+			goto try_again;
+		}
+	}
+
+	for (i = 0; i < 2; i++) {
+		ret = tsl2x7x_i2c_read(chip->client,
+			(TSL2X7X_CMD_REG |
+					(TSL2X7X_PRX_LO + i)), &chdata[i], 1);
+		if (ret < 0) {
+			dev_err(&chip->client->dev,
+			"Read regs failed in tsl2x7x_prox_poll() - B\n");
+			mutex_unlock(&chip->prox_mutex);
+			return ret;
+		}
+	}
+
+	chip->prox_cur_info.prox_data = (chdata[1]<<8)|chdata[0];
+
+	if (chip->prox_cur_info.prox_data >=
+			chip->tsl2x7x_settings.prox_thres_high)
+		chip->prox_cur_info.prox_event = 1;
+	else
+		chip->prox_cur_info.prox_event = 0;
+
+	mutex_unlock(&chip->prox_mutex);
+	return chip->prox_cur_info.prox_event;
+}
+
+/*
+ * Provides initial operational parameter defaults.
+ * These defaults may be changed through the device's sysfs files.
+ */
+static void tsl2x7x_defaults(struct tsl2X7X_chip *chip)
+{
+	/* Operational parameters */
+	chip->tsl2x7x_settings.als_time = 200;
+	/* must be a multiple of 50mS */
+	chip->tsl2x7x_settings.als_gain = 0;
+	/* this is actually an index into the gain table */
+	chip->tsl2x7x_settings.prx_time = 0xfe; /*5.4 mS */
+	/* 2.7ms prox integration time - decrease to increase time */
+	/* decreases in 2.7 ms intervals */
+	chip->tsl2x7x_settings.prox_gain = 1;
+	/* these are bits 3:2 of reg 0x0f: 0=x1,1=x2,2=x4,3=x8 */
+	/* assume clear glass as default */
+	chip->tsl2x7x_settings.wait_time = 245;
+	/* Time between PRX and ALS cycles -decrease to increase time */
+	/* decreases in 2.7 ms intervals */
+	chip->tsl2x7x_settings.prox_config = 0;
+	/* Prox configuration filters */
+	chip->tsl2x7x_settings.als_gain_trim = 1000;
+	/* default gain trim to account for aperture effects */
+	chip->tsl2x7x_settings.als_cal_target = 150;
+	/* Known external ALS reading used for calibration */
+	chip->tsl2x7x_settings.als_thresh_low = 200;
+	/* CH0 'low' count to trigger interrupt */
+	chip->tsl2x7x_settings.als_thresh_high = 256;
+	/* CH0 'high' count to trigger interrupt */
+	chip->tsl2x7x_settings.als_persistence = 0xFF;
+	/* Number of 'out of limits' ADC readings PRX/ALS*/
+	chip->tsl2x7x_settings.interrupts_en = 0x00;
+	/* Default interrupt(s) enabled.
+	 * 0x00 = none, 0x10 = als, 0x20 = prx 0x30 = bth */
+	chip->tsl2x7x_settings.prox_thres_low  = 0;
+	chip->tsl2x7x_settings.prox_thres_high = 512;
+	/*default threshold (adjust either manually or with cal routine*/
+	chip->tsl2x7x_settings.prox_max_samples_cal = 30;
+	chip->tsl2x7x_settings.prox_pulse_count = 8;
+
+	/* Load up the lux table. Can be changed later via ABI */
+	if (chip->pdata && chip->pdata->platform_lux_table[0].ratio != 0)
+		memcpy(chip->tsl2x7x_device_lux,
+			chip->pdata->platform_lux_table,
+			sizeof(chip->pdata->platform_lux_table));
+	else
+		memcpy(chip->tsl2x7x_device_lux,
+		(struct tsl2x7x_lux *)tsl2x7x_default_lux_table_group[chip->id],
+				MAX_DEFAULT_TABLE_BYTES);
+
+}
+
+/*
+ * Obtain single reading and calculate the als_gain_trim
+ * (later used to derive actual lux).
+ * Return updated gain_trim value.
+ */
+static int tsl2x7x_als_calibrate(struct iio_dev *indio_dev)
+{
+	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+	u8 reg_val;
+	int gain_trim_val;
+	int ret;
+	int lux_val;
+
+	ret = i2c_smbus_write_byte(chip->client,
+			(TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
+	if (ret < 0) {
+		dev_err(&chip->client->dev,
+		"tsl2x7x_als_calibrate failed to write CNTRL register, ret=%d\n",
+			ret);
+		return ret;
+	}
+
+	reg_val = i2c_smbus_read_byte(chip->client);
+	if ((reg_val & (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON))
+			!= (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON)) {
+		dev_err(&chip->client->dev,
+			"tsl2x7x_als_calibrate failed: ADC not enabled\n");
+		return -1;
+	}
+
+	ret = i2c_smbus_write_byte(chip->client,
+			(TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
+	if (ret < 0) {
+		dev_err(&chip->client->dev,
+		"tsl2x7x_als_calibrate failed to write ctrl reg: ret=%d\n",
+			ret);
+		return ret;
+	}
+	reg_val = i2c_smbus_read_byte(chip->client);
+
+	if ((reg_val & TSL2X7X_STA_ADC_VALID) != TSL2X7X_STA_ADC_VALID) {
+		dev_err(&chip->client->dev,
+		"tsl2x7x_als_calibrate failed: STATUS - ADC not valid.\n");
+		return -ENODATA;
+	}
+	lux_val = tsl2x7x_get_lux(indio_dev);
+	if (lux_val < 0) {
+		dev_err(&chip->client->dev,
+		"tsl2x7x_als_calibrate failed to get lux\n");
+		return lux_val;
+	}
+	gain_trim_val =  (((chip->tsl2x7x_settings.als_cal_target)
+			* chip->tsl2x7x_settings.als_gain_trim) / lux_val);
+
+	if ((gain_trim_val < 250) || (gain_trim_val > 4000))
+		return -ERANGE;
+
+	chip->tsl2x7x_settings.als_gain_trim = gain_trim_val;
+
+	dev_info(&chip->client->dev,
+			"%s als_calibrate completed\n", chip->client->name);
+
+	return (int) gain_trim_val;
+}
+
+/*
+ * Turn the device on.
+ * Configuration must be set before calling this function.
+ */
+static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
+{
+	int i;
+	int ret = 0;
+	u8 *dev_reg;
+	u8 utmp;
+	int als_count;
+	int als_time;
+	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+	u8 reg_val = 0;
+
+	if (chip->pdata && chip->pdata->power_on)
+		chip->pdata->power_on(indio_dev);
+
+	/* Non calculated parameters */
+	chip->tsl2x7x_config[TSL2X7X_PRX_TIME] =
+			chip->tsl2x7x_settings.prx_time;
+	chip->tsl2x7x_config[TSL2X7X_WAIT_TIME] =
+			chip->tsl2x7x_settings.wait_time;
+	chip->tsl2x7x_config[TSL2X7X_PRX_CONFIG] =
+			chip->tsl2x7x_settings.prox_config;
+
+	chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHLO] =
+		(chip->tsl2x7x_settings.als_thresh_low) & 0xFF;
+	chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHHI] =
+		(chip->tsl2x7x_settings.als_thresh_low >> 8) & 0xFF;
+	chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHLO] =
+		(chip->tsl2x7x_settings.als_thresh_high) & 0xFF;
+	chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHHI] =
+		(chip->tsl2x7x_settings.als_thresh_high >> 8) & 0xFF;
+	chip->tsl2x7x_config[TSL2X7X_PERSISTENCE] =
+		chip->tsl2x7x_settings.als_persistence;
+
+	chip->tsl2x7x_config[TSL2X7X_PRX_COUNT] =
+			chip->tsl2x7x_settings.prox_pulse_count;
+	chip->tsl2x7x_config[TSL2X7X_PRX_MINTHRESHLO] =
+	chip->tsl2x7x_settings.prox_thres_low;
+	chip->tsl2x7x_config[TSL2X7X_PRX_MAXTHRESHLO] =
+			chip->tsl2x7x_settings.prox_thres_high;
+
+	/* and make sure we're not already on */
+	if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
+		/* if forcing a register update - turn off, then on */
+		dev_info(&chip->client->dev, "device is already enabled\n");
+		return -EINVAL;
+	}
+
+	/* determine als integration regster */
+	als_count = (chip->tsl2x7x_settings.als_time * 100 + 135) / 270;
+	if (als_count == 0)
+		als_count = 1; /* ensure at least one cycle */
+
+	/* convert back to time (encompasses overrides) */
+	als_time = (als_count * 27 + 5) / 10;
+	chip->tsl2x7x_config[TSL2X7X_ALS_TIME] = 256 - als_count;
+
+	/* Set the gain based on tsl2x7x_settings struct */
+	chip->tsl2x7x_config[TSL2X7X_GAIN] =
+			(chip->tsl2x7x_settings.als_gain | (mA100 | DIODE1)
+				| ((chip->tsl2x7x_settings.prox_gain) << 2));
+
+	/* set chip struct re scaling and saturation */
+	chip->als_saturation = als_count * 922; /* 90% of full scale */
+	chip->als_time_scale = (als_time + 25) / 50;
+
+	/* TSL2X7X Specific power-on / adc enable sequence
+	 * Power on the device 1st. */
+	utmp = TSL2X7X_CNTL_PWR_ON;
+	ret = i2c_smbus_write_byte_data(chip->client,
+		TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
+	if (ret < 0) {
+		dev_err(&chip->client->dev, "tsl2x7x_chip_on failed on CNTRL reg.\n");
+		return -1;
+	}
+
+	/* Use the following shadow copy for our delay before enabling ADC.
+	 * Write all the registers. */
+	for (i = 0, dev_reg = chip->tsl2x7x_config; i < TSL2X7X_REG_MAX; i++) {
+		ret = i2c_smbus_write_byte_data(chip->client,
+				TSL2X7X_CMD_REG + i, *dev_reg++);
+		if (ret < 0) {
+			dev_err(&chip->client->dev,
+			"tsl2x7x_chip_on failed on write to reg %d.\n", i);
+			return ret;
+		}
+	}
+
+	udelay(3000);	/* Power-on settling time */
+
+	/* NOW enable the ADC
+	 * initialize the desired mode of operation */
+	utmp = TSL2X7X_CNTL_PWR_ON | TSL2X7X_CNTL_ADC_ENBL | CNTL_PROX_DET_ENBL;
+	ret = i2c_smbus_write_byte_data(chip->client,
+			TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
+	if (ret < 0) {
+		dev_err(&chip->client->dev, "tsl2x7x_chip_on failed on 2nd CTRL reg.\n");
+		return ret;
+		}
+
+	chip->tsl2x7x_chip_status = TSL2X7X_CHIP_WORKING;
+
+	if (chip->tsl2x7x_settings.interrupts_en != 0) {
+		dev_info(&chip->client->dev, "Setting Up Interrupt(s)\n");
+		/* first time interrupt */
+		chip->init_done = 0;
+
+
+	reg_val = TSL2X7X_CNTL_PWR_ON;
+
+	if (chip->tsl2x7x_settings.interrupts_en == 0x10)
+		reg_val |= CNTL_ADC_ENBL;
+
+	if (chip->tsl2x7x_settings.interrupts_en == 0x20)
+		reg_val |= CNTL_PROX_DET_ENBL;
+
+	if (chip->tsl2x7x_settings.interrupts_en == 0x30)
+		reg_val |= (CNTL_ADC_ENBL | CNTL_PROX_DET_ENBL);
+
+	reg_val |= chip->tsl2x7x_settings.interrupts_en;
+
+	ret = i2c_smbus_write_byte_data(chip->client,
+		(TSL2X7X_CMD_REG | TSL2X7X_CNTRL), reg_val);
+	if (ret < 0)
+		dev_err(&chip->client->dev,
+		"tsl2x7x_i2c_write to device failed in tsl2x7x_IOCTL_INT_SET.\n");
+
+	/* Clear out any initial interrupts  */
+	ret = i2c_smbus_write_byte(chip->client,
+		TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
+		TSL2X7X_CMD_PROXALS_INTCLR);
+	if (ret < 0) {
+		dev_err(&chip->client->dev,
+			"tsl2x7x_i2c_write_command failed in tsl2x7x_chip_on\n");
+		return ret;
+		}
+	}
+	return ret;
+
+}
+
+static int tsl2x7x_chip_off(struct iio_dev *indio_dev)
+{
+	int ret;
+	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+
+	/* turn device off */
+	chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
+
+	ret = i2c_smbus_write_byte_data(chip->client,
+		TSL2X7X_CMD_REG | TSL2X7X_CNTRL, 0x00);
+
+	if (chip->pdata && chip->pdata->power_off)
+		chip->pdata->power_off(chip->client);
+
+	return ret;
+}
+
+/**
+ * Integer Square Root
+ * We need an integer version since 1st Floating point is not allowed
+ * in driver world, 2nd, cannot count on the devices having a FPU, and
+ * 3rd software FP emulation may be excessive.
+ */
+static unsigned long tsl2x7x_isqrt(unsigned long x)
+{
+	register unsigned long op, res, one;
+	op = x;
+	res = 0;
+
+	one = 1 << 30;
+	while (one > op)
+		one >>= 2;
+
+	while (one != 0) {
+		if (op >= res + one) {
+			op -= res + one;
+			res += one << 1;
+		}
+		res >>= 1;
+		one >>= 2;
+	}
+	return res;
+}
+
+/*
+ * Proximity calibration helper function
+ * runs through a collection of data samples,
+ * sets the min, max, mean, and std dev.
+ */
+static
+void tsl2x7x_prox_calculate(u16 *data, int length, struct prox_stat *statP)
+{
+	int i;
+	int min, max, sum, mean;
+	unsigned long stddev;
+	int tmp;
+
+	if (length == 0)
+		length = 1;
+
+	sum = 0;
+	min = 0xffff;
+	max = 0;
+	for (i = 0; i < length; i++) {
+		sum += data[i];
+		if (data[i] < min)
+			min = data[i];
+		if (data[i] > max)
+			max = data[i];
+	}
+	mean = sum/length;
+	statP->min = min;
+	statP->max = max;
+	statP->mean = mean;
+
+	sum = 0;
+	for (i = 0; i < length; i++) {
+		tmp = data[i]-mean;
+		sum += tmp * tmp;
+	}
+	stddev = tsl2x7x_isqrt((long)sum)/length;
+	statP->stddev = stddev;
+
+}
+
+/**
+ * Proximity calibration - collects a number of samples,
+ * calculates a standard deviation based on the samples, and
+ * sets the threshold accordingly.
+ */
+static void tsl2x7x_prox_cal(struct iio_dev *indio_dev)
+{
+	u16 prox_history[MAX_SAMPLES_CAL+1];
+	int i;
+	struct prox_stat prox_stat_data[2];
+	struct prox_stat *calP;
+	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+	u8 tmp_irq_settings;
+	u8 current_state = chip->tsl2x7x_chip_status;
+
+	if (chip->tsl2x7x_settings.prox_max_samples_cal > MAX_SAMPLES_CAL) {
+		dev_err(&chip->client->dev,
+			"max prox samples cal is too big: %d\n",
+			chip->tsl2x7x_settings.prox_max_samples_cal);
+		chip->tsl2x7x_settings.prox_max_samples_cal = MAX_SAMPLES_CAL;
+	}
+
+	/* have to stop to change settings */
+	tsl2x7x_chip_off(indio_dev);
+
+	/* Enable proximity detection save just in case prox not wanted yet*/
+	tmp_irq_settings = chip->tsl2x7x_settings.interrupts_en;
+	chip->tsl2x7x_settings.interrupts_en |= CNTL_PROX_INT_ENBL;
+
+	/*turn on device if not already on*/
+	tsl2x7x_chip_on(indio_dev);
+
+	/*gather the samples*/
+	for (i = 0; i < chip->tsl2x7x_settings.prox_max_samples_cal; i++) {
+		mdelay(15);
+		tsl2x7x_prox_poll(indio_dev);
+		prox_history[i] = chip->prox_cur_info.prox_data;
+		dev_info(&chip->client->dev, "2 i=%d prox data= %d\n",
+			i, chip->prox_cur_info.prox_data);
+
+	}
+
+	tsl2x7x_chip_off(indio_dev);
+
+	calP = &prox_stat_data[PROX_STAT_CAL];
+	tsl2x7x_prox_calculate(prox_history,
+		chip->tsl2x7x_settings.prox_max_samples_cal, calP);
+	chip->tsl2x7x_settings.prox_thres_high = (calP->max << 1) - calP->mean;
+
+	dev_info(&chip->client->dev, " cal min=%d mean=%d max=%d\n",
+		calP->min, calP->mean, calP->max);
+	dev_info(&chip->client->dev,
+		"%s proximity threshold set to %d\n",
+		chip->client->name, chip->tsl2x7x_settings.prox_thres_high);
+
+	/* back to the way they were */
+	chip->tsl2x7x_settings.interrupts_en = tmp_irq_settings;
+	if (current_state == TSL2X7X_CHIP_WORKING)
+		tsl2x7x_chip_on(indio_dev);
+}
+
+/* ---------- Sysfs Interface Functions ------------- */
+
+
+static ssize_t tsl2x7x_power_state_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+
+	return snprintf(buf, PAGE_SIZE, "%d\n", chip->tsl2x7x_chip_status);
+}
+
+static ssize_t tsl2x7x_power_state_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	unsigned long value;
+
+	if (kstrtoul(buf, 0, &value))
+		return -EINVAL;
+
+	if (value == 0)
+		tsl2x7x_chip_off(dev_info);
+	else
+		tsl2x7x_chip_on(dev_info);
+
+	return len;
+}
+
+static ssize_t tsl2x7x_proximity_detect_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+
+	tsl2x7x_prox_poll(dev_info);
+
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			chip->prox_cur_info.prox_event);
+}
+
+static ssize_t tsl2x7x_gain_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+		tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain].ch0);
+}
+
+static ssize_t tsl2x7x_gain_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+	unsigned long value;
+	if (kstrtoul(buf, 0, &value))
+		return -EINVAL;
+
+	switch (value) {
+	case 1:
+		chip->tsl2x7x_settings.als_gain = 0;
+		break;
+	case 8:
+		chip->tsl2x7x_settings.als_gain = 1;
+		break;
+	case 16:
+		chip->tsl2x7x_settings.als_gain = 2;
+		break;
+	case 120:
+		chip->tsl2x7x_settings.als_gain = 3;
+		break;
+	case 128:
+		chip->tsl2x7x_settings.als_gain = 3;
+		break;
+
+	default:
+		dev_err(dev,
+			"Invalid Gain Index\n");
+		return -EINVAL;
+	}
+
+	return len;
+}
+
+static ssize_t tsl2x7x_gain_available_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+
+	if (strncmp(chip->client->name, "tsl2772", 7) == 0)
+		return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 128");
+	else
+		return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 120");
+}
+
+static ssize_t tsl2x7x_prox_gain_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			(1 << chip->tsl2x7x_settings.prox_gain));
+}
+
+static ssize_t tsl2x7x_prox_gain_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+	unsigned long value;
+	if (kstrtoul(buf, 0, &value))
+		return -EINVAL;
+
+	switch (value) {
+	case 1:
+		chip->tsl2x7x_settings.prox_gain = 0;
+		break;
+	case 2:
+		chip->tsl2x7x_settings.prox_gain = 1;
+		break;
+	case 4:
+		chip->tsl2x7x_settings.prox_gain = 2;
+		break;
+	case 8:
+		chip->tsl2x7x_settings.prox_gain = 3;
+		break;
+	default:
+		dev_err(dev,
+			"Invalid Prox Gain Index\n");
+		return -EINVAL;
+	}
+
+	return len;
+}
+
+static ssize_t tsl2x7x_prox_gain_available_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+		return snprintf(buf, PAGE_SIZE, "%s\n", "1 2 4 8");
+}
+
+static ssize_t tsl2x7x_als_time_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			chip->tsl2x7x_settings.als_time);
+}
+
+static ssize_t tsl2x7x_als_time_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+	unsigned long value;
+
+	if (kstrtoul(buf, 0, &value))
+		return -EINVAL;
+
+	if ((value < 50) || (value > 650))
+		return -EINVAL;
+
+	if (value % 50)
+		return -EINVAL;
+
+	 chip->tsl2x7x_settings.als_time = value;
+
+	return len;
+}
+
+static ssize_t tsl2x7x_als_time_available_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, "%s\n",
+		"50 100 150 200 250 300 350 400 450 500 550 600 650");
+}
+
+static ssize_t tsl2x7x_als_trim_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			chip->tsl2x7x_settings.als_gain_trim);
+}
+
+static ssize_t tsl2x7x_als_trim_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+	unsigned long value;
+
+	if (kstrtoul(buf, 0, &value))
+		return -EINVAL;
+
+	if (value)
+		chip->tsl2x7x_settings.als_gain_trim = value;
+
+	return len;
+}
+
+static ssize_t tsl2x7x_als_cal_target_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			chip->tsl2x7x_settings.als_cal_target);
+}
+
+static ssize_t tsl2x7x_als_cal_target_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+	unsigned long value;
+
+	if (kstrtoul(buf, 0, &value))
+		return -EINVAL;
+
+	if (value)
+		chip->tsl2x7x_settings.als_cal_target = value;
+
+	return len;
+}
+
+static ssize_t tsl2x7x_interrupts_en_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+
+	if (chip->tsl2x7x_settings.interrupts_en & 0x10)
+		return snprintf(buf, PAGE_SIZE, "%d\n", 1);
+	else
+		return snprintf(buf, PAGE_SIZE, "%d\n", 0);
+}
+
+static ssize_t tsl2x7x_interrupts_en_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+	unsigned long value;
+
+	if (kstrtoul(buf, 0, &value))
+		return -EINVAL;
+
+	if (value > 1)
+		return -EINVAL;
+	if (value)
+		chip->tsl2x7x_settings.interrupts_en |= 0x10;
+	else
+		chip->tsl2x7x_settings.interrupts_en &= 0x20;
+
+	return len;
+}
+
+static ssize_t tsl2x7x_prox_interrupt_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+
+	if (chip->tsl2x7x_settings.interrupts_en & 0x20)
+		return snprintf(buf, PAGE_SIZE, "%d\n", 1);
+	else
+		return snprintf(buf, PAGE_SIZE, "%d\n", 0);
+}
+
+static ssize_t tsl2x7x_prox_interrupt_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+	unsigned long value;
+
+	if (kstrtoul(buf, 0, &value))
+		return -EINVAL;
+
+	if (value > 1)
+		return -EINVAL;
+	if (value)
+		chip->tsl2x7x_settings.interrupts_en |= 0x20;
+	else
+		chip->tsl2x7x_settings.interrupts_en &= 0x10;
+
+	return len;
+}
+
+static ssize_t tsl2x7x_als_thresh_low_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			chip->tsl2x7x_settings.als_thresh_low);
+}
+
+static ssize_t tsl2x7x_als_thresh_low_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+	unsigned long value;
+
+	if (kstrtoul(buf, 0, &value))
+		return -EINVAL;
+
+	chip->tsl2x7x_settings.als_thresh_low = value;
+
+	return len;
+}
+
+static ssize_t tsl2x7x_als_thresh_high_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			chip->tsl2x7x_settings.als_thresh_high);
+}
+
+static ssize_t tsl2x7x_als_thresh_high_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+	unsigned long value;
+
+	if (kstrtoul(buf, 0, &value))
+		return -EINVAL;
+
+	chip->tsl2x7x_settings.als_thresh_high = value;
+
+	return len;
+}
+
+static ssize_t tsl2x7x_prox_thresh_low_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			chip->tsl2x7x_settings.prox_thres_low);
+}
+
+static ssize_t tsl2x7x_prox_thresh_low_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+	unsigned long value;
+
+	if (kstrtoul(buf, 0, &value))
+		return -EINVAL;
+
+	chip->tsl2x7x_settings.prox_thres_low = value;
+
+	return len;
+}
+
+static ssize_t tsl2x7x_prox_thresh_high_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			chip->tsl2x7x_settings.prox_thres_high);
+}
+
+static ssize_t tsl2x7x_prox_thresh_high_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+	unsigned long value;
+
+	if (kstrtoul(buf, 0, &value))
+		return -EINVAL;
+
+	chip->tsl2x7x_settings.prox_thres_high = value;
+
+	return len;
+}
+
+static ssize_t tsl2x7x_prox_data_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+	tsl2x7x_prox_poll(dev_info);
+
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			chip->prox_cur_info.prox_data);
+}
+
+/* sampling_frequency AKA persistence in data sheet */
+static ssize_t tsl2x7x_als_persistence_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+
+	return snprintf(buf, PAGE_SIZE, "0x%02X\n",
+			chip->tsl2x7x_settings.als_persistence);
+}
+
+static ssize_t tsl2x7x_als_persistence_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+	unsigned long value;
+
+	if (kstrtoul(buf, 0, &value))
+		return -EINVAL;
+
+	chip->tsl2x7x_settings.als_persistence = value;
+
+	return len;
+}
+
+static
+ssize_t tsl2x7x_als_persistence_available_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	return snprintf(buf, PAGE_SIZE, "0x00 - 0xFF (0 - 255)\n");
+}
+
+static
+ssize_t tsl2x7x_lux_show(struct device *dev, struct device_attribute *attr,
+	char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	int lux;
+
+	lux = tsl2x7x_get_lux(dev_info);
+
+	return snprintf(buf, PAGE_SIZE, "%d\n", lux);
+}
+
+static
+ssize_t tsl2x7x_adc_show(struct device *dev, struct device_attribute *attr,
+	char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+
+	tsl2x7x_get_lux(dev_info);
+
+	return snprintf(buf, PAGE_SIZE, "0x%08x\n",
+			((chip->als_cur_info.als_ch0 << 16) |
+					chip->als_cur_info.als_ch1));
+}
+
+static ssize_t tsl2x7x_do_calibrate(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	unsigned long value;
+
+	if (kstrtoul(buf, 0, &value))
+		return -EINVAL;
+
+	if (value == 1)
+		tsl2x7x_als_calibrate(dev_info);
+
+	return len;
+}
+
+static ssize_t tsl2x7x_luxtable_show(struct device *dev,
+	struct device_attribute *attr, char *buf)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+	int i;
+	int offset = 0;
+
+	i = 0;
+	while (i < (MAX_TABLE_SIZE * 3)) {
+		offset += snprintf(buf + offset, PAGE_SIZE, "%d,%d,%d,",
+			chip->tsl2x7x_device_lux[i].ratio,
+			chip->tsl2x7x_device_lux[i].ch0,
+			chip->tsl2x7x_device_lux[i].ch1);
+		if (chip->tsl2x7x_device_lux[i].ratio == 0) {
+			/* We just printed the first "0" entry.
+			 * Now get rid of the extra "," and break. */
+			offset--;
+			break;
+		}
+		i++;
+	}
+
+	offset += snprintf(buf + offset, PAGE_SIZE, "\n");
+	return offset;
+}
+
+static ssize_t tsl2x7x_luxtable_store(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+	int value[ARRAY_SIZE(chip->tsl2x7x_device_lux)*3 + 1];
+	int n;
+
+	get_options(buf, ARRAY_SIZE(value), value);
+
+	/* We now have an array of ints starting at value[1], and
+	 * enumerated by value[0].
+	 * We expect each group of three ints is one table entry,
+	 * and the last table entry is all 0.
+	 */
+	n = value[0];
+	if ((n % 3) || n < 6 ||
+			n > ((ARRAY_SIZE(chip->tsl2x7x_device_lux) - 1) * 3)) {
+		dev_info(dev, "LUX TABLE INPUT ERROR 1 Value[0]=%d\n", n);
+		return -EINVAL;
+	}
+
+	if ((value[(n - 2)] | value[(n - 1)] | value[n]) != 0) {
+		dev_info(dev, "LUX TABLE INPUT ERROR 2 Value[0]=%d\n", n);
+		return -EINVAL;
+	}
+
+	if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING)
+		tsl2x7x_chip_off(dev_info);
+
+	/* Zero out the table */
+	memset(chip->tsl2x7x_device_lux, 0, sizeof(chip->tsl2x7x_device_lux));
+	memcpy(chip->tsl2x7x_device_lux, &value[1], (value[0] * 4));
+
+	return len;
+}
+
+static ssize_t tsl2x7x_do_prox_calibrate(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t len)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	unsigned long value;
+
+	if (kstrtoul(buf, 0, &value))
+		return -EINVAL;
+
+	if (value == 1)
+		tsl2x7x_prox_cal(dev_info);
+
+	return len;
+}
+
+static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR,
+		tsl2x7x_power_state_show, tsl2x7x_power_state_store);
+
+static DEVICE_ATTR(proximity_raw, S_IRUGO,
+		tsl2x7x_proximity_detect_show, NULL);
+
+static DEVICE_ATTR(intensity_infrared_raw, S_IRUGO,
+		tsl2x7x_prox_data_show, NULL);
+
+
+static DEVICE_ATTR(proximity_calibscale, S_IRUGO | S_IWUSR,
+		tsl2x7x_prox_gain_show, tsl2x7x_prox_gain_store);
+static DEVICE_ATTR(proximity_calibscale_available, S_IRUGO,
+		tsl2x7x_prox_gain_available_show, NULL);
+
+static DEVICE_ATTR(illuminance0_calibscale, S_IRUGO | S_IWUSR,
+		tsl2x7x_gain_show, tsl2x7x_gain_store);
+static DEVICE_ATTR(illuminance0_calibscale_available, S_IRUGO,
+		tsl2x7x_gain_available_show, NULL);
+
+static DEVICE_ATTR(illuminance0_integration_time, S_IRUGO | S_IWUSR,
+		tsl2x7x_als_time_show, tsl2x7x_als_time_store);
+static DEVICE_ATTR(illuminance0_integration_time_available, S_IRUGO,
+		tsl2x7x_als_time_available_show, NULL);
+
+static DEVICE_ATTR(illuminance0_calibbias, S_IRUGO | S_IWUSR,
+		tsl2x7x_als_trim_show, tsl2x7x_als_trim_store);
+
+static DEVICE_ATTR(illuminance0_input_target, S_IRUGO | S_IWUSR,
+		tsl2x7x_als_cal_target_show, tsl2x7x_als_cal_target_store);
+
+static DEVICE_ATTR(illuminance0_both_raw, S_IRUGO, tsl2x7x_adc_show,
+		NULL);
+
+static DEVICE_ATTR(illuminance0_input, S_IRUGO, tsl2x7x_lux_show,
+		NULL);
+static DEVICE_ATTR(illuminance0_calibrate, S_IWUSR, NULL,
+		tsl2x7x_do_calibrate);
+static DEVICE_ATTR(proximity_calibrate, S_IWUSR, NULL,
+		tsl2x7x_do_prox_calibrate);
+
+static DEVICE_ATTR(illuminance0_lux_table, S_IRUGO | S_IWUSR,
+		tsl2x7x_luxtable_show, tsl2x7x_luxtable_store);
+
+static DEVICE_ATTR(illuminance0_thresh_falling_value, S_IRUGO | S_IWUSR,
+		tsl2x7x_als_thresh_low_show, tsl2x7x_als_thresh_low_store);
+
+static DEVICE_ATTR(illuminance0_thresh_rising_value, S_IRUGO | S_IWUSR,
+		tsl2x7x_als_thresh_high_show, tsl2x7x_als_thresh_high_store);
+
+static DEVICE_ATTR(sampling_frequency, S_IRUGO | S_IWUSR,
+		tsl2x7x_als_persistence_show, tsl2x7x_als_persistence_store);
+
+static DEVICE_ATTR(sampling_frequency_available, S_IRUGO,
+		tsl2x7x_als_persistence_available_show, NULL);
+
+static DEVICE_ATTR(proximity_thresh_rising_value, S_IRUGO | S_IWUSR,
+		tsl2x7x_prox_thresh_high_show, tsl2x7x_prox_thresh_high_store);
+
+static DEVICE_ATTR(proximity_thresh_falling_value, S_IRUGO | S_IWUSR,
+		tsl2x7x_prox_thresh_low_show, tsl2x7x_prox_thresh_low_store);
+
+static struct attribute *tsl2571_device_attrs[] = {
+	&dev_attr_power_state.attr,
+	&dev_attr_illuminance0_calibscale.attr,
+	&dev_attr_illuminance0_calibscale_available.attr,
+	&dev_attr_illuminance0_integration_time.attr,
+	&dev_attr_illuminance0_integration_time_available.attr,
+	&dev_attr_illuminance0_calibbias.attr,
+	&dev_attr_illuminance0_input_target.attr,
+	&dev_attr_illuminance0_both_raw.attr,
+	&dev_attr_illuminance0_input.attr,
+	&dev_attr_illuminance0_calibrate.attr,
+	&dev_attr_illuminance0_lux_table.attr,
+	&dev_attr_illuminance0_thresh_falling_value.attr,
+	&dev_attr_illuminance0_thresh_rising_value.attr,
+	&dev_attr_sampling_frequency.attr,
+	&dev_attr_sampling_frequency_available.attr,
+	NULL
+};
+
+static struct attribute *tsl2671_device_attrs[] = {
+	&dev_attr_power_state.attr,
+	&dev_attr_proximity_raw.attr,
+	&dev_attr_intensity_infrared_raw.attr,
+	&dev_attr_sampling_frequency.attr,
+	&dev_attr_sampling_frequency_available.attr,
+	&dev_attr_proximity_thresh_rising_value.attr,
+	&dev_attr_proximity_thresh_falling_value.attr,
+	&dev_attr_proximity_calibrate.attr,
+	NULL
+};
+
+static struct attribute *tsl2771_device_attrs[] = {
+	&dev_attr_power_state.attr,
+	&dev_attr_proximity_raw.attr,
+	&dev_attr_intensity_infrared_raw.attr,
+	&dev_attr_illuminance0_calibscale.attr,
+	&dev_attr_illuminance0_calibscale_available.attr,
+	&dev_attr_illuminance0_integration_time.attr,
+	&dev_attr_illuminance0_integration_time_available.attr,
+	&dev_attr_illuminance0_calibbias.attr,
+	&dev_attr_illuminance0_input_target.attr,
+	&dev_attr_illuminance0_both_raw.attr,
+	&dev_attr_illuminance0_input.attr,
+	&dev_attr_illuminance0_calibrate.attr,
+	&dev_attr_illuminance0_lux_table.attr,
+	&dev_attr_illuminance0_thresh_falling_value.attr,
+	&dev_attr_illuminance0_thresh_rising_value.attr,
+	&dev_attr_sampling_frequency.attr,
+	&dev_attr_sampling_frequency_available.attr,
+	&dev_attr_proximity_thresh_rising_value.attr,
+	&dev_attr_proximity_thresh_falling_value.attr,
+	&dev_attr_proximity_calibrate.attr,
+	NULL
+};
+
+static struct attribute *tsl2572_device_attrs[] = {
+	&dev_attr_power_state.attr,
+	&dev_attr_illuminance0_calibscale.attr,
+	&dev_attr_illuminance0_calibscale_available.attr,
+	&dev_attr_illuminance0_integration_time.attr,
+	&dev_attr_illuminance0_integration_time_available.attr,
+	&dev_attr_illuminance0_calibbias.attr,
+	&dev_attr_illuminance0_input_target.attr,
+	&dev_attr_illuminance0_both_raw.attr,
+	&dev_attr_illuminance0_input.attr,
+	&dev_attr_illuminance0_calibrate.attr,
+	&dev_attr_illuminance0_lux_table.attr,
+	&dev_attr_illuminance0_thresh_falling_value.attr,
+	&dev_attr_illuminance0_thresh_rising_value.attr,
+	&dev_attr_sampling_frequency.attr,
+	&dev_attr_sampling_frequency_available.attr,
+	NULL
+};
+
+static struct attribute *tsl2672_device_attrs[] = {
+	&dev_attr_power_state.attr,
+	&dev_attr_proximity_raw.attr,
+	&dev_attr_intensity_infrared_raw.attr,
+	&dev_attr_proximity_calibscale.attr,
+	&dev_attr_sampling_frequency.attr,
+	&dev_attr_sampling_frequency_available.attr,
+	&dev_attr_proximity_thresh_rising_value.attr,
+	&dev_attr_proximity_thresh_falling_value.attr,
+	&dev_attr_proximity_calibrate.attr,
+	NULL
+};
+
+static struct attribute *tsl2772_device_attrs[] = {
+		&dev_attr_power_state.attr,
+		&dev_attr_proximity_raw.attr,
+		&dev_attr_proximity_calibscale.attr,
+		&dev_attr_intensity_infrared_raw.attr,
+		&dev_attr_illuminance0_calibscale.attr,
+		&dev_attr_illuminance0_calibscale_available.attr,
+		&dev_attr_illuminance0_integration_time.attr,
+		&dev_attr_illuminance0_integration_time_available.attr,
+		&dev_attr_illuminance0_calibbias.attr,
+		&dev_attr_illuminance0_input_target.attr,
+		&dev_attr_illuminance0_both_raw.attr,
+		&dev_attr_illuminance0_input.attr,
+		&dev_attr_illuminance0_calibrate.attr,
+		&dev_attr_illuminance0_lux_table.attr,
+		&dev_attr_illuminance0_thresh_falling_value.attr,
+		&dev_attr_illuminance0_thresh_rising_value.attr,
+		&dev_attr_sampling_frequency.attr,
+		&dev_attr_sampling_frequency_available.attr,
+		&dev_attr_proximity_thresh_rising_value.attr,
+		&dev_attr_proximity_thresh_falling_value.attr,
+		&dev_attr_proximity_calibrate.attr,
+		&dev_attr_proximity_calibscale_available.attr,
+		NULL
+};
+
+static struct attribute_group tsl2X7X_dev_attr_group_tbl[] = {
+	[tsl2571] = {
+		.attrs = tsl2571_device_attrs,
+	},
+	[tsl2671] = {
+		.attrs = tsl2671_device_attrs,
+	},
+	[tmd2671] = {
+		.attrs = tsl2671_device_attrs,
+	},
+	[tsl2771] = {
+		.attrs = tsl2771_device_attrs,
+	},
+	[tmd2771] = {
+		.attrs = tsl2771_device_attrs,
+	},
+	[tsl2572] = {
+		.attrs = tsl2572_device_attrs,
+	},
+	[tsl2672] = {
+		.attrs = tsl2672_device_attrs,
+	},
+	[tmd2672] = {
+		.attrs = tsl2672_device_attrs,
+	},
+	[tsl2772] = {
+		.attrs = tsl2772_device_attrs,
+	},
+	[tmd2772] = {
+		.attrs = tsl2772_device_attrs,
+	},
+
+};
+
+static IIO_DEVICE_ATTR(illuminance_thresh_both_en,
+		S_IRUGO | S_IWUSR,
+		tsl2x7x_interrupts_en_show, tsl2x7x_interrupts_en_store, 0);
+
+static IIO_DEVICE_ATTR(proximity_thresh_both_en,
+		S_IRUGO | S_IWUSR,
+		tsl2x7x_prox_interrupt_show, tsl2x7x_prox_interrupt_store, 0);
+
+static struct attribute *tsl2X7X_prox_event_attributes[] = {
+	&iio_dev_attr_proximity_thresh_both_en.dev_attr.attr,
+	NULL,
+};
+
+static struct attribute *tsl2X7X_als_event_attributes[] = {
+	&iio_dev_attr_illuminance_thresh_both_en.dev_attr.attr,
+	NULL,
+};
+
+static struct attribute *tsl2X7X_proxals_event_attributes[] = {
+	&iio_dev_attr_illuminance_thresh_both_en.dev_attr.attr,
+	&iio_dev_attr_proximity_thresh_both_en.dev_attr.attr,
+	NULL,
+};
+
+static struct attribute_group tsl2X7X_event_attr_group_tbl[] = {
+	[tsl2571] = {
+		.attrs = tsl2X7X_als_event_attributes,
+		.name  = "events",
+	},
+	[tsl2671] = {
+		.attrs = tsl2X7X_prox_event_attributes,
+		.name  = "events",
+	},
+	[tmd2671] = {
+		.attrs = tsl2X7X_prox_event_attributes,
+		.name  = "events",
+	},
+	[tsl2771] = {
+		.attrs = tsl2X7X_proxals_event_attributes,
+		.name  = "events",
+	},
+	[tmd2771] = {
+		.attrs = tsl2X7X_proxals_event_attributes,
+		.name  = "events",
+	},
+
+	[tsl2572] = {
+		.attrs = tsl2X7X_als_event_attributes,
+		.name  = "events",
+	},
+	[tsl2672] = {
+		.attrs = tsl2X7X_prox_event_attributes,
+		.name  = "events",
+	},
+	[tmd2672] = {
+		.attrs = tsl2X7X_prox_event_attributes,
+		.name  = "events",
+	},
+	[tsl2772] = {
+		.attrs = tsl2X7X_proxals_event_attributes,
+		.name  = "events",
+	},
+	[tmd2772] = {
+		.attrs = tsl2X7X_proxals_event_attributes,
+		.name  = "events",
+	}
+};
+
+
+/* Use the default register values to identify the Taos device */
+static int tsl2x7x_device_id(unsigned char *bufp, int target)
+{
+	switch (target) {
+	case tsl2571:
+	case tsl2671:
+	case tsl2771:
+		return ((bufp[TSL2X7X_CHIPID] & 0xf0) == TRITON_ID);
+	break;
+	case tmd2671:
+	case tmd2771:
+		return ((bufp[TSL2X7X_CHIPID] & 0xf0) == HALIBUT_ID);
+	break;
+	case tsl2572:
+	case tsl2672:
+	case tmd2672:
+	case tsl2772:
+	case tmd2772:
+		return ((bufp[TSL2X7X_CHIPID] & 0xf0) == SWORDFISH_ID);
+	break;
+	}
+
+	return -EINVAL;
+}
+
+static const struct iio_info tsl2X7X_info[] = {
+	[tsl2571] = {
+			.attrs = &tsl2X7X_dev_attr_group_tbl[tsl2571],
+			.event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2571],
+			.driver_module = THIS_MODULE,
+	},
+	[tsl2671] = {
+			.attrs = &tsl2X7X_dev_attr_group_tbl[tsl2671],
+			.event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2671],
+			.driver_module = THIS_MODULE,
+	},
+	[tmd2671] = {
+			.attrs = &tsl2X7X_dev_attr_group_tbl[tsl2671],
+			.event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2671],
+			.driver_module = THIS_MODULE,
+	},
+	[tsl2771] = {
+			.attrs = &tsl2X7X_dev_attr_group_tbl[tsl2771],
+			.event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2771],
+			.driver_module = THIS_MODULE,
+	},
+	[tmd2771] = {
+			.attrs = &tsl2X7X_dev_attr_group_tbl[tsl2771],
+			.event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2771],
+			.driver_module = THIS_MODULE,
+	},
+	[tsl2572] = {
+			.attrs = &tsl2X7X_dev_attr_group_tbl[tsl2572],
+			.event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2572],
+			.driver_module = THIS_MODULE,
+	},
+	[tsl2672] = {
+			.attrs = &tsl2X7X_dev_attr_group_tbl[tsl2672],
+			.event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2672],
+			.driver_module = THIS_MODULE,
+	},
+	[tmd2672] = {
+			.attrs = &tsl2X7X_dev_attr_group_tbl[tsl2672],
+			.event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2672],
+			.driver_module = THIS_MODULE,
+	},
+	[tsl2772] = {
+			.attrs = &tsl2X7X_dev_attr_group_tbl[tsl2772],
+			.event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2772],
+			.driver_module = THIS_MODULE,
+	},
+	[tmd2772] = {
+			.attrs = &tsl2X7X_dev_attr_group_tbl[tsl2772],
+			.event_attrs = &tsl2X7X_event_attr_group_tbl[tsl2772],
+			.driver_module = THIS_MODULE,
+	},
+
+};
+
+/*
+ * Run-time interrupt handler - depending on whether the device is in ambient
+ * light sensing interrupt mode, this handler can queue up
+ * a thread, to handle valid interrupts.
+ */
+static irqreturn_t tsl2x7x_event_handler(int irq, void *private)
+{
+	struct iio_dev *indio_dev = private;
+	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+	s64 timestamp = iio_get_time_ns();
+	int ret;
+	int value;
+
+	value = i2c_smbus_read_byte_data(chip->client,
+		TSL2X7X_CMD_REG | TSL2X7X_STATUS);
+
+	/* What type of interrupt do we need to process */
+	if (value & TSL2X7X_STA_PRX_INTR) {
+		tsl2x7x_prox_poll(indio_dev);
+		iio_push_event(indio_dev,
+			       IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY,
+						    0,
+						    IIO_EV_TYPE_THRESH,
+						    IIO_EV_DIR_EITHER),
+						    timestamp);
+	}
+
+	if (value & TSL2X7X_STA_ALS_INTR) {
+		tsl2x7x_get_lux(indio_dev);
+		iio_push_event(indio_dev,
+		       IIO_UNMOD_EVENT_CODE(IIO_LIGHT,
+					    0,
+					    IIO_EV_TYPE_THRESH,
+					    IIO_EV_DIR_EITHER),
+					    timestamp);
+	}
+	/* Clear interrupt now that we have the status */
+	ret = i2c_smbus_write_byte(chip->client,
+		TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
+		TSL2X7X_CMD_PROXALS_INTCLR);
+	if (ret < 0)
+		dev_err(&chip->client->dev,
+		"Failed to clear irq from event handler. err = %d\n", ret);
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * Client probe function.
+ */
+static int __devinit tsl2x7x_probe(struct i2c_client *clientp,
+	const struct i2c_device_id *id)
+{
+	int i, ret;
+	unsigned char buf[TSL2X7X_MAX_DEVICE_REGS];
+	struct iio_dev *indio_dev =
+			iio_allocate_device(sizeof(struct tsl2X7X_chip));
+	struct tsl2X7X_chip	*chip = iio_priv(indio_dev);
+
+	if (indio_dev == NULL) {
+		ret = -ENOMEM;
+		dev_err(&clientp->dev, "iio allocation failed\n");
+		goto fail1;
+	}
+
+	chip = iio_priv(indio_dev);
+	chip->client = clientp;
+	i2c_set_clientdata(clientp, indio_dev);
+
+	mutex_init(&chip->als_mutex);
+	mutex_init(&chip->prox_mutex);
+
+	chip->tsl2x7x_chip_status = TSL2X7X_CHIP_UNKNOWN;
+
+	chip->pdata = clientp->dev.platform_data;
+	if (chip->pdata && chip->pdata->init)
+			chip->pdata->init(clientp);
+
+	for (i = 0; i < TSL2X7X_MAX_DEVICE_REGS; i++) {
+		ret = i2c_smbus_write_byte(clientp,
+				(TSL2X7X_CMD_REG | (TSL2X7X_CNTRL + i)));
+		if (ret < 0) {
+			dev_err(&clientp->dev, "i2c_smbus_write_bytes() to cmd "
+			"reg failed in tsl2x7x_probe(), err = %d\n", ret);
+			goto fail1;
+		}
+		ret = i2c_smbus_read_byte(clientp);
+		if (ret < 0) {
+			dev_err(&clientp->dev, "i2c_smbus_read_byte from "
+			"reg failed in tsl2x7x_probe(), err = %d\n", ret);
+
+			goto fail1;
+		}
+		buf[i] = ret;
+	}
+
+	if ((!tsl2x7x_device_id(buf, id->driver_data)) ||
+			(tsl2x7x_device_id(buf, id->driver_data) == -EINVAL)) {
+		dev_info(&chip->client->dev, "i2c device found but does not match "
+			"expected id in tsl2x7x_probe()\n");
+		goto fail1;
+	}
+
+	chip->id = id->driver_data;
+
+	ret = i2c_smbus_write_byte(clientp, (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
+	if (ret < 0) {
+		dev_err(&clientp->dev, "i2c_smbus_write_byte() to cmd reg "
+			"failed in tsl2x7x_probe(), err = %d\n", ret);
+		goto fail1;
+	}
+
+	indio_dev->info = &tsl2X7X_info[id->driver_data];
+	indio_dev->dev.parent = &clientp->dev;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->name = chip->client->name;
+	indio_dev->channels = tsl2X7X_channels;
+	indio_dev->num_channels = ARRAY_SIZE(tsl2X7X_channels);
+
+	ret = iio_device_register(indio_dev);
+	if (ret) {
+		dev_err(&clientp->dev, "iio registration failed\n");
+		goto fail2;
+	}
+
+	if (clientp->irq) {
+		ret = request_threaded_irq(clientp->irq,
+					   NULL,
+					   &tsl2x7x_event_handler,
+					   IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					   "TSL2X7X_event",
+					   indio_dev);
+		if (ret)
+			dev_err(&clientp->dev, "irq request failed");
+	}
+
+	/* Load up the defaults */
+	tsl2x7x_defaults(chip);
+
+	/* Make sure the chip is on */
+	tsl2x7x_chip_on(indio_dev);
+
+	dev_info(&clientp->dev, "%s Light sensor found.\n", id->name);
+
+	return 0;
+
+fail1:
+	if (chip->pdata && chip->pdata->teardown)
+		chip->pdata->teardown(clientp);
+	iio_free_device(indio_dev);
+
+fail2:
+	return ret;
+
+}
+
+
+static int tsl2x7x_suspend(struct device *dev)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+
+	int ret = 0;
+
+	/* Blocks if work is active */
+	cancel_work_sync(&chip->work_thresh);
+
+	if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
+		ret = tsl2x7x_chip_off(dev_info);
+		chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
+	}
+
+	if (chip->pdata && chip->pdata->platform_power) {
+		pm_message_t pmm = {PM_EVENT_SUSPEND};
+		chip->pdata->platform_power(dev, pmm);
+	}
+
+	return ret;
+}
+
+static int tsl2x7x_resume(struct device *dev)
+{
+	struct iio_dev *dev_info = dev_get_drvdata(dev);
+	struct tsl2X7X_chip *chip = iio_priv(dev_info);
+	int ret = 0;
+
+	if (chip->pdata && chip->pdata->platform_power) {
+		pm_message_t pmm = {PM_EVENT_RESUME};
+		chip->pdata->platform_power(dev, pmm);
+	}
+
+	if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_SUSPENDED)
+		ret = tsl2x7x_chip_on(dev_info);
+
+	return ret;
+}
+
+static int __devexit tsl2x7x_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = i2c_get_clientdata(client);
+	struct tsl2X7X_chip *chip = i2c_get_clientdata(client);
+
+	tsl2x7x_chip_off(indio_dev);
+
+	if (client->irq)
+		free_irq(client->irq, chip->client->name);
+
+	flush_scheduled_work();
+
+	iio_device_unregister(chip->iio_dev);
+	kfree(chip);
+
+	if (chip->pdata && chip->pdata->teardown)
+		chip->pdata->teardown(client);
+
+	return 0;
+}
+
+static struct i2c_device_id tsl2x7x_idtable[] = {
+	{ "tsl2571", tsl2571 },
+	{ "tsl2671", tsl2671 },
+	{ "tmd2671", tmd2671 },
+	{ "tsl2771", tsl2771 },
+	{ "tmd2771", tmd2771 },
+	{ "tsl2572", tsl2572 },
+	{ "tsl2672", tsl2672 },
+	{ "tmd2672", tmd2672 },
+	{ "tsl2772", tsl2772 },
+	{ "tmd2772", tmd2772 },
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, tsl2x7x_idtable);
+
+static const struct dev_pm_ops tsl2x7x_pm_ops = {
+	.suspend = tsl2x7x_suspend,
+	.resume  = tsl2x7x_resume,
+};
+
+/* Driver definition */
+static struct i2c_driver tsl2x7x_driver = {
+	.driver = {
+		.name = "tsl2X7X",
+		.pm = &tsl2x7x_pm_ops,
+
+	},
+	.id_table = tsl2x7x_idtable,
+	.probe = tsl2x7x_probe,
+	.remove = __devexit_p(tsl2x7x_remove),
+};
+
+static int __init tsl2x7x_init(void)
+{
+	return i2c_add_driver(&tsl2x7x_driver);
+}
+
+static void __exit tsl2x7x_exit(void)
+{
+	i2c_del_driver(&tsl2x7x_driver);
+}
+
+module_init(tsl2x7x_init);
+module_exit(tsl2x7x_exit);
+
+MODULE_AUTHOR("J. August Brenner<jbrenner@taosinc.com>");
+MODULE_DESCRIPTION("TAOS tsl2X7X ambient light sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/staging/iio/light/tsl2x7x_core.h b/drivers/staging/iio/light/tsl2x7x_core.h
new file mode 100644
index 0000000..9a64412
--- /dev/null
+++ b/drivers/staging/iio/light/tsl2x7x_core.h
@@ -0,0 +1,138 @@
+/*
+ * Device driver for monitoring ambient light intensity (lux)
+ * and proximity (prox) within the TAOS TSL2X7X family of devices.
+ *
+ * Copyright (c) 2012, TAOS 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.
+ */
+
+#ifndef __TSL2X7X_H
+#define __TSL2X7X_H
+#include <linux/pm.h>
+
+#include "../iio.h"
+
+/* TAOS Register definitions - note:
+ * depending on device, some of these register are not used and the
+ * register address is benign.
+ */
+/* 2X7X register offsets */
+#define TSL2X7X_MAX_DEVICE_REGS 32
+#define TSL2X7X_REG_MAX         16
+
+/* Device Registers and Masks */
+#define TSL2X7X_CNTRL                  0x00
+#define TSL2X7X_ALS_TIME               0X01
+#define TSL2X7X_PRX_TIME               0x02
+#define TSL2X7X_WAIT_TIME              0x03
+#define TSL2X7X_ALS_MINTHRESHLO        0X04
+#define TSL2X7X_ALS_MINTHRESHHI        0X05
+#define TSL2X7X_ALS_MAXTHRESHLO        0X06
+#define TSL2X7X_ALS_MAXTHRESHHI        0X07
+#define TSL2X7X_PRX_MINTHRESHLO        0X08
+#define TSL2X7X_PRX_MINTHRESHHI        0X09
+#define TSL2X7X_PRX_MAXTHRESHLO        0X0A
+#define TSL2X7X_PRX_MAXTHRESHHI        0X0B
+#define TSL2X7X_PERSISTENCE            0x0C
+#define TSL2X7X_PRX_CONFIG             0x0D
+#define TSL2X7X_PRX_COUNT              0x0E
+#define TSL2X7X_GAIN                   0x0F
+#define TSL2X7X_NOTUSED                0x10
+#define TSL2X7X_REVID                  0x11
+#define TSL2X7X_CHIPID                 0x12
+#define TSL2X7X_STATUS                 0x13
+#define TSL2X7X_ALS_CHAN0LO            0x14
+#define TSL2X7X_ALS_CHAN0HI            0x15
+#define TSL2X7X_ALS_CHAN1LO            0x16
+#define TSL2X7X_ALS_CHAN1HI            0x17
+#define TSL2X7X_PRX_LO                 0x18
+#define TSL2X7X_PRX_HI                 0x19
+
+/* tsl2X7X cmd reg masks */
+#define TSL2X7X_CMD_REG                0x80
+#define TSL2X7X_CMD_SPL_FN             0x60
+
+#define TSL2X7X_CMD_PROX_INT_CLR       0X05
+#define TSL2X7X_CMD_ALS_INT_CLR        0x06
+#define CMD_PROXALS_INT_CLR            0X07
+
+/* tsl2X7X cntrl reg masks */
+#define TSL2X7X_CNTL_ADC_ENBL          0x02
+#define TSL2X7X_CNTL_PWR_ON            0x01
+
+/* tsl2X7X status reg masks */
+#define TSL2X7X_STA_ADC_VALID          0x01
+#define TSL2X7X_STA_PRX_VALID          0x02
+#define TSL2X7X_STA_ADC_PRX_VALID      0x03
+#define TSL2X7X_STA_ALS_INTR           0x10
+#define TSL2X7X_STA_ADC_INTR           0x10
+#define TSL2X7X_STA_PRX_INTR           0x20
+
+#define TSL2X7X_STA_ADC_INTR           0x10
+
+/* tsl2X7X cntrl reg masks */
+#define CNTL_REG_CLEAR                 0x00
+#define CNTL_PROX_INT_ENBL             0X20
+#define CNTL_ALS_INT_ENBL              0X10
+#define TSL2X7X_CNTL_WAIT_TMR_ENBL     0X08
+#define CNTL_PROX_DET_ENBL             0X04
+#define CNTL_ADC_ENBL                  0x02
+#define TSL2X7X_CNTL_PWRON             0x01
+#define CNTL_ALSPON_ENBL               0x03
+#define CNTL_INTALSPON_ENBL            0x13
+#define CNTL_PROXPON_ENBL              0x0F
+#define CNTL_INTPROXPON_ENBL           0x2F
+#define TSL2X7X_CMD_PROXALS_INTCLR     0X07
+
+/*Prox diode to use */
+#define DIODE0                         0x10
+#define DIODE1                         0x20
+#define DIODE_BOTH                     0x30
+
+/* LED Power */
+#define mA100                          0x00
+#define mA50                           0x40
+#define mA25                           0x80
+#define mA13                           0xD0
+
+/* Max number of segments allowable in LUX table */
+#define MAX_TABLE_SIZE		9
+#define MAX_DEFAULT_TABLE_BYTES (sizeof(int) * MAX_TABLE_SIZE)
+
+struct tsl2x7x_lux {
+	unsigned int ratio;
+	unsigned int ch0;
+	unsigned int ch1;
+};
+
+
+/* struct tsl2x7x_platform_data - Assume all varients will have this */
+struct tsl2X7X_platform_data {
+	int (*platform_power)(struct device *dev, pm_message_t);
+	/* The following callback gets called when the TSL2772 is powered on */
+	int (*power_on)      (struct iio_dev *indio_dev);
+	/* The following callback gets called when the TSL2772 is powered off */
+	int (*power_off)     (struct i2c_client *dev);
+	/* The following callback gets called when the driver is added */
+	int (*init)          (struct i2c_client *dev);
+	/* The following callback gets called when the driver is removed */
+	int (*teardown)      (struct i2c_client *dev);
+	/* These are the device specific glass coefficents used to
+	 * calculate Lux */
+	struct tsl2x7x_lux platform_lux_table[MAX_TABLE_SIZE];
+};
+
+#endif /* __TSL2X7X_H */
--
1.7.4.1

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