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    Subject[PATCH V8] TAOS tsl2x7x
    From
    Date
    TAOS device driver (version 8) for the tsl/tmd 2771 and 2772 device families (inc. all variants).

    updates:
    Documentation - added prefix corrections as suggested, corrected document merge issue.
    Code - added remaining 'in_' prefixs.

    Signed-off-by: Jon Brenner <jbrenner@taosinc.com>
    ---
    .../light/sysfs-bus-iio-light-tsl2583 | 6 +
    .../light/sysfs-bus-iio-light-tsl2x7x | 13 +
    drivers/staging/iio/Documentation/sysfs-bus-iio | 10 +
    .../staging/iio/Documentation/sysfs-bus-iio-light | 15 +-
    drivers/staging/iio/light/Kconfig | 8 +
    drivers/staging/iio/light/Makefile | 1 +
    drivers/staging/iio/light/tsl2x7x.h | 100 +
    drivers/staging/iio/light/tsl2x7x_core.c | 2076 ++++++++++++++++++++
    8 files changed, 2221 insertions(+), 8 deletions(-)

    diff --git a/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583 b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583
    new file mode 100755
    index 0000000..470f7ad
    --- /dev/null
    +++ b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583
    @@ -0,0 +1,6 @@
    +What: /sys/bus/iio/devices/device[n]/in_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.
    diff --git a/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2x7x b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2x7x
    new file mode 100755
    index 0000000..b2798b2
    --- /dev/null
    +++ b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2x7x
    @@ -0,0 +1,13 @@
    +What: /sys/bus/iio/devices/device[n]/in_illuminance0_calibrate
    +KernelVersion: 3.3-rc1
    +Contact: linux-iio@vger.kernel.org
    +Description:
    + 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]/in_proximity0_calibrate
    +KernelVersion: 3.3-rc1
    +Contact: linux-iio@vger.kernel.org
    +Description:
    + Causes a recalculation and adjustment to the
    + proximity_thresh_rising_value.
    diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio b/drivers/staging/iio/Documentation/sysfs-bus-iio
    index ca12784..eec9acb 100644
    --- a/drivers/staging/iio/Documentation/sysfs-bus-iio
    +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio
    @@ -243,6 +243,8 @@ What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibbias
    What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibbias
    What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibbias
    What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibbias
    +What: /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibbias
    +What: /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibbias
    KernelVersion: 2.6.35
    Contact: linux-iio@vger.kernel.org
    Description:
    @@ -258,6 +260,8 @@ What /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibscale
    What /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibscale
    What /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibscale
    What /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibscale
    +what /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibscale
    +what /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibscale
    KernelVersion: 2.6.35
    Contact: linux-iio@vger.kernel.org
    Description:
    @@ -457,6 +461,10 @@ What: /sys/.../events/in_voltageY_raw_thresh_rising_value
    What: /sys/.../events/in_voltageY_raw_thresh_falling_value
    What: /sys/.../events/in_tempY_raw_thresh_rising_value
    What: /sys/.../events/in_tempY_raw_thresh_falling_value
    +What: /sys/.../events/in_illuminance0_thresh_falling_value
    +what: /sys/.../events/in_illuminance0_thresh_rising_value
    +what: /sys/.../events/in_proximity0_thresh_falling_value
    +what: /sys/.../events/in_proximity0_thresh_rising_value
    KernelVersion: 2.6.37
    Contact: linux-iio@vger.kernel.org
    Description:
    @@ -556,6 +564,8 @@ What: /sys/.../events/in_tempY_thresh_falling_period
    What: /sys/.../events/in_tempY_roc_rising_period
    What: /sys/.../events/in_tempY_roc_falling_period
    What: /sys/.../events/in_accel_x&y&z_mag_falling_period
    +What: /sys/.../events/in_intensity0_thresh_period
    +What: /sys/.../events/in_proximity0_thresh_period
    KernelVersion: 2.6.37
    Contact: linux-iio@vger.kernel.org
    Description:
    diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-light b/drivers/staging/iio/Documentation/sysfs-bus-iio-light
    index edbf470..715c74d 100644
    --- a/drivers/staging/iio/Documentation/sysfs-bus-iio-light
    +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio-light
    @@ -26,7 +26,7 @@ Description:
    Hardware dependent list of possible values supported for the
    adc_resolution of the given sensor.

    -What: /sys/bus/iio/devices/device[n]/illuminance0[_input|_raw]
    +What: /sys/bus/iio/devices/device[n]/in_illuminance0[_input|_raw]
    KernelVersion: 2.6.35
    Contact: linux-iio@vger.kernel.org
    Description:
    @@ -45,7 +45,7 @@ Description:
    do this calculation manually by reading the infrared sensor
    value and doing the negation in sw.

    -What: /sys/bus/iio/devices/device[n]/proximity[_input|_raw]
    +What: /sys/bus/iio/devices/device[n]/in_proximity[_input|_raw]
    KernelVersion: 2.6.37
    Contact: linux-iio@vger.kernel.org
    Description:
    @@ -63,23 +63,22 @@ Description:
    and if expressed in SI units, should include _input. If this
    value is not in SI units, then it should include _raw.

    -What: /sys/bus/iio/devices/device[n]/illuminance0_target
    +What: /sys/bus/iio/devices/device[n]/in_illuminance0_target
    KernelVersion: 2.6.37
    Contact: linux-iio@vger.kernel.org
    Description:
    This property gets/sets the last known external
    lux measurement used in/for calibration.

    -What: /sys/bus/iio/devices/device[n]/illuminance0_integration_time
    +What: /sys/bus/iio/devices/device[n]/in_illuminance0_integration_time
    KernelVersion: 2.6.37
    Contact: linux-iio@vger.kernel.org
    Description:
    This property gets/sets the sensors ADC analog integration time.

    -What: /sys/bus/iio/devices/device[n]/illuminance0_calibscale
    +What: /sys/bus/iio/devices/device[n]/in_illuminance0_lux_table
    KernelVersion: 2.6.37
    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).
    + This property gets/sets the table of coefficients
    + used in calculating illuminance in lux.
    diff --git a/drivers/staging/iio/light/Kconfig b/drivers/staging/iio/light/Kconfig
    index bb633f6..821ad6b 100644
    --- a/drivers/staging/iio/light/Kconfig
    +++ b/drivers/staging/iio/light/Kconfig
    @@ -41,4 +41,12 @@ config TSL2583
    Provides support for the TAOS tsl2580, tsl2581 and tsl2583 devices.
    Access ALS data via iio, sysfs.

    +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 535d313..141af1e 100644
    --- a/drivers/staging/iio/light/Makefile
    +++ b/drivers/staging/iio/light/Makefile
    @@ -6,3 +6,4 @@ obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o
    obj-$(CONFIG_SENSORS_ISL29018) += isl29018.o
    obj-$(CONFIG_SENSORS_ISL29028) += isl29028.o
    obj-$(CONFIG_TSL2583) += tsl2583.o
    +obj-$(CONFIG_TSL2x7x) += tsl2x7x_core.o
    diff --git a/drivers/staging/iio/light/tsl2x7x.h b/drivers/staging/iio/light/tsl2x7x.h
    new file mode 100755
    index 0000000..c4acf5f
    --- /dev/null
    +++ b/drivers/staging/iio/light/tsl2x7x.h
    @@ -0,0 +1,100 @@
    +/*
    + * 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>
    +
    +/* Max number of segments allowable in LUX table */
    +#define TSL2X7X_MAX_LUX_TABLE_SIZE 9
    +#define MAX_DEFAULT_TABLE_BYTES (sizeof(int) * TSL2X7X_MAX_LUX_TABLE_SIZE)
    +
    +struct iio_dev;
    +
    +struct tsl2x7x_lux {
    + unsigned int ratio;
    + unsigned int ch0;
    + unsigned int ch1;
    +};
    +
    +/**
    + * struct tsl2x7x_default_settings - power on defaults unless
    + * overridden by platform data.
    + * @als_time: ALS Integration time - multiple of 50mS
    + * @als_gain: Index into the ALS gain table.
    + * @als_gain_trim: default gain trim to account for
    + * aperture effects.
    + * @wait_time: Time between PRX and ALS cycles
    + * in 2.7 periods
    + * @prx_time: 5.2ms prox integration time -
    + * decrease in 2.7ms periods
    + * @prx_gain: Proximity gain index
    + * @prox_config: Prox configuration filters.
    + * @als_cal_target: Known external ALS reading for
    + * calibration.
    + * @interrupts_en: Enable/Disable - 0x00 = none, 0x10 = als,
    + * 0x20 = prx, 0x30 = bth
    + * @persistence: H/W Filters, Number of 'out of limits'
    + * ADC readings PRX/ALS.
    + * @als_thresh_low: CH0 'low' count to trigger interrupt.
    + * @als_thresh_high: CH0 'high' count to trigger interrupt.
    + * @prox_thres_low: Low threshold proximity detection.
    + * @prox_thres_high: High threshold proximity detection
    + * @prox_pulse_count: Number if proximity emitter pulses
    + * @prox_max_samples_cal: Used for prox cal.
    + */
    +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 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;
    +};
    +
    +/**
    + * struct tsl2X7X_platform_data - Platform callback, glass and defaults
    + * @platform_power: Suspend/resume platform callback
    + * @power_on: Power on callback
    + * @power_off: Power off callback
    + * @platform_lux_table: Device specific glass coefficents
    + * @platform_default_settings: Device specific power on defaults
    + *
    + */
    +struct tsl2X7X_platform_data {
    + int (*platform_power)(struct device *dev, pm_message_t);
    + int (*power_on) (struct iio_dev *indio_dev);
    + int (*power_off) (struct i2c_client *dev);
    + struct tsl2x7x_lux platform_lux_table[TSL2X7X_MAX_LUX_TABLE_SIZE];
    + struct tsl2x7x_settings *platform_default_settings;
    +};
    +
    +#endif /* __TSL2X7X_H */
    diff --git a/drivers/staging/iio/light/tsl2x7x_core.c b/drivers/staging/iio/light/tsl2x7x_core.c
    new file mode 100755
    index 0000000..5f35849
    --- /dev/null
    +++ b/drivers/staging/iio/light/tsl2x7x_core.c
    @@ -0,0 +1,2076 @@
    +/*
    + * 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/mutex.h>
    +#include <linux/interrupt.h>
    +#include <linux/slab.h>
    +#include <linux/module.h>
    +#include <linux/version.h>
    +#include "tsl2x7x.h"
    +#include "../events.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 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_CONFIG_REG 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 TSL2X7X_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 (TSL2X7X_STA_ADC_VALID |\
    + TSL2X7X_STA_PRX_VALID)
    +#define TSL2X7X_STA_ALS_INTR 0x10
    +#define TSL2X7X_STA_PRX_INTR 0x20
    +
    +/* tsl2X7X cntrl reg masks */
    +#define TSL2X7X_CNTL_REG_CLEAR 0x00
    +#define TSL2X7X_CNTL_PROX_INT_ENBL 0X20
    +#define TSL2X7X_CNTL_ALS_INT_ENBL 0X10
    +#define TSL2X7X_CNTL_WAIT_TMR_ENBL 0X08
    +#define TSL2X7X_CNTL_PROX_DET_ENBL 0X04
    +#define TSL2X7X_CNTL_PWRON 0x01
    +#define TSL2X7X_CNTL_ALSPON_ENBL 0x03
    +#define TSL2X7X_CNTL_INTALSPON_ENBL 0x13
    +#define TSL2X7X_CNTL_PROXPON_ENBL 0x0F
    +#define TSL2X7X_CNTL_INTPROXPON_ENBL 0x2F
    +
    +/*Prox diode to use */
    +#define TSL2X7X_DIODE0 0x10
    +#define TSL2X7X_DIODE1 0x20
    +#define TSL2X7X_DIODE_BOTH 0x30
    +
    +/* LED Power */
    +#define TSL2X7X_mA100 0x00
    +#define TSL2X7X_mA50 0x40
    +#define TSL2X7X_mA25 0x80
    +#define TSL2X7X_mA13 0xD0
    +#define TSL2X7X_MAX_TIMER_CNT (0xFF)
    +
    +/*Common device IIO EventMask */
    +#define TSL2X7X_EVENT_MASK \
    + (IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) | \
    + IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING)),
    +
    +/* 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
    +};
    +
    +struct tsl2x7x_parse_result {
    + int integer;
    + int fract;
    +};
    +
    +/* Per-device data */
    +struct tsl2x7x_als_info {
    + u16 als_ch0;
    + u16 als_ch1;
    + u16 lux;
    +};
    +
    +struct tsl2x7x_prox_stat {
    + int min;
    + int max;
    + int mean;
    + unsigned long stddev;
    +};
    +
    +struct tsl2x7x_chip_info {
    + int chan_table_elements;
    + struct iio_chan_spec channel[4];
    + const struct iio_info *info;
    +};
    +
    +struct tsl2X7X_chip {
    + kernel_ulong_t id;
    + struct mutex prox_mutex;
    + struct mutex als_mutex;
    + struct i2c_client *client;
    + u16 prox_data;
    + 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_MAX_CONFIG_REG];
    + const struct tsl2x7x_chip_info *chip_info;
    + const struct iio_info *info;
    + s64 event_timestamp;
    + /* This structure is intentionally large to accommodate
    + * updates via sysfs. */
    + /* Sized to 9 = max 8 segments + 1 termination segment */
    + struct tsl2x7x_lux tsl2x7x_device_lux[TSL2X7X_MAX_LUX_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,
    +};
    +
    +static const struct tsl2x7x_settings tsl2x7x_default_settings = {
    + .als_time = 219, /* 101 ms */
    + .als_gain = 0,
    + .prx_time = 254, /* 5.4 ms */
    + .prox_gain = 1,
    + .wait_time = 245,
    + .prox_config = 0,
    + .als_gain_trim = 1000,
    + .als_cal_target = 150,
    + .als_thresh_low = 200,
    + .als_thresh_high = 256,
    + .persistence = 255,
    + .interrupts_en = 0,
    + .prox_thres_low = 0,
    + .prox_thres_high = 512,
    + .prox_max_samples_cal = 30,
    + .prox_pulse_count = 8
    +};
    +
    +static const s16 tsl2X7X_als_gainadj[] = {
    + 1,
    + 8,
    + 16,
    + 120
    +};
    +
    +static const s16 tsl2X7X_prx_gainadj[] = {
    + 1,
    + 2,
    + 4,
    + 8
    +};
    +
    +/* Channel variations */
    +enum {
    + ALS,
    + PRX,
    + ALSPRX,
    + PRX2,
    + ALSPRX2,
    +};
    +
    +const u8 device_channel_config[] = {
    + ALS,
    + PRX,
    + PRX,
    + ALSPRX,
    + ALSPRX,
    + ALS,
    + PRX2,
    + PRX2,
    + ALSPRX2,
    + ALSPRX2
    +};
    +
    +/**
    + * tsl2x7x_parse_buffer() - parse a decimal result from a buffer.
    + * @*buf: pointer to char buffer to parse
    + * @*result: pointer to buffer to contain
    + * resulting interger / decimal as ints.
    + *
    + */
    +static int
    +tsl2x7x_parse_buffer(const char *buf, struct tsl2x7x_parse_result *result)
    +{
    + int integer = 0, fract = 0, fract_mult = 100000;
    + bool integer_part = true, negative = false;
    +
    + if (buf[0] == '-') {
    + negative = true;
    + buf++;
    + }
    +
    + while (*buf) {
    + if ('0' <= *buf && *buf <= '9') {
    + if (integer_part)
    + integer = integer*10 + *buf - '0';
    + else {
    + fract += fract_mult*(*buf - '0');
    + if (fract_mult == 1)
    + break;
    + fract_mult /= 10;
    + }
    + } else if (*buf == '\n') {
    + if (*(buf + 1) == '\0')
    + break;
    + else
    + return -EINVAL;
    + } else if (*buf == '.') {
    + integer_part = false;
    + } else {
    + return -EINVAL;
    + }
    + buf++;
    + }
    + if (negative) {
    + if (integer)
    + integer = -integer;
    + else
    + fract = -fract;
    + }
    +
    + result->integer = integer;
    + result->fract = fract;
    +
    + return 0;
    +}
    +
    +/**
    + * tsl2x7x_i2c_read() - Read a byte from a register.
    + * @client: i2c client
    + * @reg: device register to read from
    + * @*val: pointer to location to store register contents.
    + *
    + */
    +static int
    +tsl2x7x_i2c_read(struct i2c_client *client, u8 reg, u8 *val)
    +{
    + int ret = 0;
    +
    + /* select register to write */
    + ret = i2c_smbus_write_byte(client, (TSL2X7X_CMD_REG | reg));
    + if (ret < 0) {
    + dev_err(&client->dev, "%s: failed to write register %x\n"
    + , __func__, reg);
    + return ret;
    + }
    +
    + /* read the data */
    + ret = i2c_smbus_read_byte(client);
    + if (ret >= 0)
    + *val = (u8)ret;
    + else
    + dev_err(&client->dev, "%s: failed to read register %x\n"
    + , __func__, reg);
    +
    + return ret;
    +}
    +
    +/**
    + * tsl2x7x_get_lux() - Reads and calculates current lux value.
    + * @indio_dev: pointer to IIO device
    + *
    + * 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. Array tsl2x7x_device_lux[]
    + * 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;
    + 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)
    + 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, "%s: device is not enabled\n",
    + __func__);
    + ret = -EBUSY ;
    + goto out_unlock;
    + }
    +
    + ret = tsl2x7x_i2c_read(chip->client,
    + (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &buf[0]);
    + if (ret < 0) {
    + dev_err(&chip->client->dev,
    + "%s: Failed to read STATUS Reg\n", __func__);
    + goto out_unlock;
    + }
    + /* is data new & valid */
    + if (!(buf[0] & TSL2X7X_STA_ADC_VALID)) {
    + dev_err(&chip->client->dev,
    + "%s: data not valid yet\n", __func__);
    + 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]);
    + if (ret < 0) {
    + dev_err(&chip->client->dev,
    + "%s: failed to read. err=%x\n", __func__, ret);
    + goto out_unlock;
    + }
    + }
    +
    + /* clear any existing interrupt status */
    + 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,
    + "%s: i2c_write_command failed - err = %d\n",
    + __func__, 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)) {
    + lux = TSL2X7X_LUX_CALC_OVER_FLOW;
    + goto return_max;
    + }
    +
    + if (ch0 == 0) {
    + /* have no data, so return LAST VALUE */
    + ret = chip->als_cur_info.lux;
    + goto out_unlock;
    + }
    + /* calculate ratio */
    + ratio = (ch1 << 15) / ch0;
    + /* convert to unscaled lux using the pointer to the table */
    + p = (struct tsl2x7x_lux *) chip->tsl2x7x_device_lux;
    + while (p->ratio != 0 && p->ratio < ratio)
    + p++;
    +
    + if (p->ratio == 0) {
    + lux = 0;
    + } else {
    + ch0lux = DIV_ROUND_UP((ch0 * p->ch0),
    + tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]);
    + ch1lux = DIV_ROUND_UP((ch1 * p->ch1),
    + tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]);
    + lux = ch0lux - ch1lux;
    + }
    +
    + /* note: lux is 31 bit max at this point */
    + if (ch1lux > ch0lux) {
    + dev_dbg(&chip->client->dev, "ch1lux > ch0lux-return last value\n");
    + ret = chip->als_cur_info.lux;
    + 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 */
    + lux = TSL2X7X_LUX_CALC_OVER_FLOW;
    +
    + /* Update the structure with the latest lux. */
    +return_max:
    + chip->als_cur_info.lux = lux;
    + ret = lux;
    +
    +out_unlock:
    + mutex_unlock(&chip->als_mutex);
    +
    + return ret;
    +}
    +
    +/**
    + * tsl2x7x_get_prox() - Reads proximity data registers and updates
    + * chip->prox_data.
    + *
    + * @indio_dev: pointer to IIO device
    + */
    +static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
    +{
    + int i;
    + int ret;
    + u8 status;
    + u8 chdata[2];
    + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
    +
    + if (mutex_trylock(&chip->prox_mutex) == 0) {
    + dev_err(&chip->client->dev,
    + "%s: Can't get prox mutex\n", __func__);
    + return -EBUSY;
    + }
    +
    + ret = tsl2x7x_i2c_read(chip->client,
    + (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &status);
    + if (ret < 0) {
    + dev_err(&chip->client->dev,
    + "%s: i2c err=%d\n", __func__, ret);
    + goto prox_poll_err;
    + }
    +
    + switch (chip->id) {
    + case tsl2571:
    + case tsl2671:
    + case tmd2671:
    + case tsl2771:
    + case tmd2771:
    + if (!(status & TSL2X7X_STA_ADC_VALID))
    + goto prox_poll_err;
    + break;
    + case tsl2572:
    + case tsl2672:
    + case tmd2672:
    + case tsl2772:
    + case tmd2772:
    + if (!(status & TSL2X7X_STA_PRX_VALID))
    + goto prox_poll_err;
    + break;
    + }
    +
    + for (i = 0; i < 2; i++) {
    + ret = tsl2x7x_i2c_read(chip->client,
    + (TSL2X7X_CMD_REG |
    + (TSL2X7X_PRX_LO + i)), &chdata[i]);
    + if (ret < 0)
    + goto prox_poll_err;
    + }
    +
    + chip->prox_data =
    + le16_to_cpup((const __le16 *)&chdata[0]);
    +
    +prox_poll_err:
    +
    + mutex_unlock(&chip->prox_mutex);
    +
    + return chip->prox_data;
    +}
    +
    +/**
    + * tsl2x7x_defaults() - Populates the device nominal operating parameters
    + * with those provided by a 'platform' data struct or
    + * with prefined defaults.
    + *
    + * @chip: pointer to device structure.
    + */
    +static void tsl2x7x_defaults(struct tsl2X7X_chip *chip)
    +{
    + /* If Operational settings defined elsewhere.. */
    + if (chip->pdata && chip->pdata->platform_default_settings != 0)
    + memcpy(&(chip->tsl2x7x_settings),
    + chip->pdata->platform_default_settings,
    + sizeof(tsl2x7x_default_settings));
    + else
    + memcpy(&(chip->tsl2x7x_settings),
    + &tsl2x7x_default_settings,
    + sizeof(tsl2x7x_default_settings));
    +
    + /* Load up the proper lux table. */
    + 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);
    +}
    +
    +/**
    + * tsl2x7x_als_calibrate() - Obtain single reading and calculate
    + * the als_gain_trim.
    + *
    + * @indio_dev: pointer to IIO device
    + */
    +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,
    + "%s: failed to write CNTRL register, ret=%d\n",
    + __func__, 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,
    + "%s: failed: ADC not enabled\n", __func__);
    + return -1;
    + }
    +
    + ret = i2c_smbus_write_byte(chip->client,
    + (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
    + if (ret < 0) {
    + dev_err(&chip->client->dev,
    + "%s: failed to write ctrl reg: ret=%d\n",
    + __func__, 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,
    + "%s: failed: STATUS - ADC not valid.\n", __func__);
    + return -ENODATA;
    + }
    +
    + lux_val = tsl2x7x_get_lux(indio_dev);
    + if (lux_val < 0) {
    + dev_err(&chip->client->dev,
    + "%s: failed to get lux\n", __func__);
    + 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;
    +}
    +
    +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.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 |
    + (TSL2X7X_mA100 | TSL2X7X_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,
    + "%s: failed on CNTRL reg.\n", __func__);
    + return ret;
    + }
    +
    + /* 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_MAX_CONFIG_REG; i++) {
    + ret = i2c_smbus_write_byte_data(chip->client,
    + TSL2X7X_CMD_REG + i, *dev_reg++);
    + if (ret < 0) {
    + dev_err(&chip->client->dev,
    + "%s: failed on write to reg %d.\n", __func__, 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 |
    + TSL2X7X_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,
    + "%s: failed on 2nd CTRL reg.\n", __func__);
    + 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");
    +
    + reg_val = TSL2X7X_CNTL_PWR_ON | TSL2X7X_CNTL_ADC_ENBL;
    + if ((chip->tsl2x7x_settings.interrupts_en == 0x20) ||
    + (chip->tsl2x7x_settings.interrupts_en == 0x30))
    + reg_val |= TSL2X7X_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,
    + "%s: failed in tsl2x7x_IOCTL_INT_SET.\n",
    + __func__);
    +
    + /* Clear out any initial interrupts */
    + ret = i2c_smbus_write_byte(chip->client,
    + TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
    + TSL2X7X_CMD_PROXALS_INT_CLR);
    + if (ret < 0) {
    + dev_err(&chip->client->dev,
    + "%s: Failed to clear Int status\n",
    + __func__);
    + 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;
    +}
    +
    +/**
    + * tsl2x7x_invoke_change
    + * @indio_dev: pointer to IIO device
    + *
    + * Obtain and lock both ALS and PROX resources,
    + * determine and save device state (On/Off),
    + * cycle device to implement updated parameter,
    + * put device back into proper state, and unlock
    + * resource.
    + */
    +int tsl2x7x_invoke_change(struct iio_dev *indio_dev)
    +{
    + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
    + int device_status = chip->tsl2x7x_chip_status;
    +
    + mutex_lock(&chip->als_mutex);
    + mutex_lock(&chip->prox_mutex);
    +
    + if (device_status == TSL2X7X_CHIP_WORKING)
    + tsl2x7x_chip_off(indio_dev);
    +
    + tsl2x7x_chip_on(indio_dev);
    +
    + if (device_status != TSL2X7X_CHIP_WORKING)
    + tsl2x7x_chip_off(indio_dev);
    +
    + mutex_unlock(&chip->prox_mutex);
    + mutex_unlock(&chip->als_mutex);
    +
    + return 0;
    +}
    +
    +static
    +void tsl2x7x_prox_calculate(int *data, int length,
    + struct tsl2x7x_prox_stat *statP)
    +{
    + int i;
    + int sample_sum;
    + int tmp;
    +
    + if (length == 0)
    + length = 1;
    +
    + sample_sum = 0;
    + statP->min = INT_MAX;
    + statP->max = INT_MIN;
    + for (i = 0; i < length; i++) {
    + sample_sum += data[i];
    + statP->min = min(statP->min, data[i]);
    + statP->max = max(statP->max, data[i]);
    + }
    +
    + statP->mean = sample_sum / length;
    + sample_sum = 0;
    + for (i = 0; i < length; i++) {
    + tmp = data[i] - statP->mean;
    + sample_sum += tmp * tmp;
    + }
    + statP->stddev = int_sqrt((long)sample_sum)/length;
    +}
    +
    +/**
    + * tsl2x7x_prox_cal() - Calculates std. and sets thresholds.
    + * @indio_dev: pointer to IIO device
    + *
    + * Calculates a standard deviation based on the samples,
    + * and sets the threshold accordingly.
    + */
    +static void tsl2x7x_prox_cal(struct iio_dev *indio_dev)
    +{
    + int prox_history[MAX_SAMPLES_CAL + 1];
    + int i;
    + struct tsl2x7x_prox_stat prox_stat_data[2];
    + struct tsl2x7x_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,
    + "%s: max prox samples cal is too big: %d\n",
    + __func__, 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 |= TSL2X7X_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_get_prox(indio_dev);
    + prox_history[i] = chip->prox_data;
    + dev_info(&chip->client->dev, "2 i=%d prox data= %d\n",
    + i, chip->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);
    +}
    +
    +static ssize_t tsl2x7x_power_state_show(struct device *dev,
    + struct device_attribute *attr, char *buf)
    +{
    + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev));
    +
    + 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 *indio_dev = dev_get_drvdata(dev);
    + bool value;
    +
    + if (strtobool(buf, &value))
    + return -EINVAL;
    +
    + if (value)
    + tsl2x7x_chip_on(indio_dev);
    + else
    + tsl2x7x_chip_off(indio_dev);
    +
    + return len;
    +}
    +
    +static ssize_t tsl2x7x_gain_available_show(struct device *dev,
    + struct device_attribute *attr, char *buf)
    +{
    + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev));
    +
    + switch (chip->id) {
    + case tsl2571:
    + case tsl2671:
    + case tmd2671:
    + case tsl2771:
    + case tmd2771:
    + return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 128");
    + break;
    + }
    +
    + return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 120");
    +}
    +
    +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 tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev));
    + int y, z;
    +
    + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
    + z = y * 2.72;
    + y /= 1000;
    + z %= 1000;
    +
    + return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
    +}
    +
    +static ssize_t tsl2x7x_als_time_store(struct device *dev,
    + struct device_attribute *attr, const char *buf, size_t len)
    +{
    + struct iio_dev *indio_dev = dev_get_drvdata(dev);
    + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev));
    + struct tsl2x7x_parse_result result;
    +
    + result.integer = 0;
    + result.fract = 0;
    +
    + tsl2x7x_parse_buffer(buf, &result);
    +
    + result.fract /= 1000;
    + result.fract /= 3;
    + chip->tsl2x7x_settings.als_time =
    + (TSL2X7X_MAX_TIMER_CNT - (u8)result.fract);
    +
    + dev_info(&chip->client->dev, "%s: als time = %d",
    + __func__, chip->tsl2x7x_settings.als_time);
    +
    + tsl2x7x_invoke_change(indio_dev);
    +
    + return IIO_VAL_INT_PLUS_MICRO;
    +}
    +
    +static IIO_CONST_ATTR(in_illuminance0_integration_time_available,
    + ".00272 - .696");
    +
    +static ssize_t tsl2x7x_als_cal_target_show(struct device *dev,
    + struct device_attribute *attr, char *buf)
    +{
    + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev));
    +
    + 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 *indio_dev = dev_get_drvdata(dev);
    + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev));
    + unsigned long value;
    +
    + if (kstrtoul(buf, 0, &value))
    + return -EINVAL;
    +
    + if (value)
    + chip->tsl2x7x_settings.als_cal_target = value;
    +
    + tsl2x7x_invoke_change(indio_dev);
    +
    + return len;
    +}
    +
    +/* persistence settings */
    +static ssize_t tsl2x7x_als_persistence_show(struct device *dev,
    + struct device_attribute *attr, char *buf)
    +{
    + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev));
    + int y, z, filter_delay;
    +
    + /* Determine integration time */
    + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
    + z = y * 2.72;
    + filter_delay = z * (chip->tsl2x7x_settings.persistence & 0x0F);
    + y = (filter_delay / 1000);
    + z = (filter_delay % 1000);
    +
    + return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
    +}
    +
    +static ssize_t tsl2x7x_als_persistence_store(struct device *dev,
    + struct device_attribute *attr, const char *buf, size_t len)
    +{
    + struct iio_dev *indio_dev = dev_get_drvdata(dev);
    + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev));
    + struct tsl2x7x_parse_result result;
    + int y, z, filter_delay;
    +
    + result.integer = 0;
    + result.fract = 0;
    + tsl2x7x_parse_buffer(buf, &result);
    +
    + result.fract /= 1000;
    + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
    + z = y * 2.72;
    +
    + filter_delay =
    + DIV_ROUND_UP(((result.integer * 1000) + result.fract), z);
    +
    + chip->tsl2x7x_settings.persistence &= 0xF0;
    + chip->tsl2x7x_settings.persistence |= (filter_delay & 0x0F);
    +
    + dev_info(&chip->client->dev, "%s: als persistence = %d",
    + __func__, filter_delay);
    +
    + tsl2x7x_invoke_change(indio_dev);
    +
    + return IIO_VAL_INT_PLUS_MICRO;
    +}
    +
    +static ssize_t tsl2x7x_prox_persistence_show(struct device *dev,
    + struct device_attribute *attr, char *buf)
    +{
    + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev));
    + int y, z, filter_delay;
    +
    + /* Determine integration time */
    + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1;
    + z = y * 2.72;
    + filter_delay = z * ((chip->tsl2x7x_settings.persistence & 0xF0) >> 4);
    + y = (filter_delay / 1000);
    + z = (filter_delay % 1000);
    +
    + return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
    +}
    +
    +static ssize_t tsl2x7x_prox_persistence_store(struct device *dev,
    + struct device_attribute *attr, const char *buf, size_t len)
    +{
    + struct iio_dev *indio_dev = dev_get_drvdata(dev);
    + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev));
    + struct tsl2x7x_parse_result result;
    + int y, z, filter_delay;
    +
    + result.integer = 0;
    + result.fract = 0;
    + tsl2x7x_parse_buffer(buf, &result);
    +
    + result.fract /= 1000;
    + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1;
    + z = y * 2.72;
    +
    + filter_delay =
    + DIV_ROUND_UP(((result.integer * 1000) + result.fract), z);
    +
    + chip->tsl2x7x_settings.persistence &= 0x0F;
    + chip->tsl2x7x_settings.persistence |= ((filter_delay << 4) & 0xF0);
    +
    + dev_info(&chip->client->dev, "%s: prox persistence = %d",
    + __func__, filter_delay);
    +
    + tsl2x7x_invoke_change(indio_dev);
    +
    + return IIO_VAL_INT_PLUS_MICRO;
    +}
    +
    +
    +static ssize_t tsl2x7x_do_calibrate(struct device *dev,
    + struct device_attribute *attr, const char *buf, size_t len)
    +{
    + struct iio_dev *indio_dev = dev_get_drvdata(dev);
    + bool value;
    +
    + if (strtobool(buf, &value))
    + return -EINVAL;
    +
    + if (value)
    + tsl2x7x_als_calibrate(indio_dev);
    +
    + tsl2x7x_invoke_change(indio_dev);
    +
    + return len;
    +}
    +
    +static ssize_t tsl2x7x_luxtable_show(struct device *dev,
    + struct device_attribute *attr, char *buf)
    +{
    + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev));
    + int i = 0;
    + int offset = 0;
    +
    + while (i < (TSL2X7X_MAX_LUX_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 *indio_dev = dev_get_drvdata(dev);
    + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev));
    + 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(indio_dev);
    +
    + /* 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));
    +
    + tsl2x7x_invoke_change(indio_dev);
    +
    + 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 *indio_dev = dev_get_drvdata(dev);
    + bool value;
    +
    + if (strtobool(buf, &value))
    + return -EINVAL;
    +
    + if (value)
    + tsl2x7x_prox_cal(indio_dev);
    +
    + tsl2x7x_invoke_change(indio_dev);
    +
    + return len;
    +}
    +
    +static int tsl2x7x_read_interrupt_config(struct iio_dev *indio_dev,
    + u64 event_code)
    +{
    + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
    + int ret;
    +
    + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY)
    + ret = !!(chip->tsl2x7x_settings.interrupts_en & 0x10);
    + else
    + ret = !!(chip->tsl2x7x_settings.interrupts_en & 0x20);
    +
    + return ret;
    +}
    +
    +static int tsl2x7x_write_interrupt_config(struct iio_dev *indio_dev,
    + u64 event_code,
    + int val)
    +{
    + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
    +
    +
    +
    + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) {
    + if (val)
    + chip->tsl2x7x_settings.interrupts_en |= 0x10;
    + else
    + chip->tsl2x7x_settings.interrupts_en &= 0x20;
    + } else {
    + if (val)
    + chip->tsl2x7x_settings.interrupts_en |= 0x20;
    + else
    + chip->tsl2x7x_settings.interrupts_en &= 0x10;
    + }
    +
    + tsl2x7x_invoke_change(indio_dev);
    +
    + return 0;
    +}
    +
    +static int tsl2x7x_write_thresh(struct iio_dev *indio_dev,
    + u64 event_code,
    + int val)
    +{
    + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
    +
    +
    + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) {
    + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
    + case IIO_EV_DIR_RISING:
    + chip->tsl2x7x_settings.als_thresh_high = val;
    + break;
    + case IIO_EV_DIR_FALLING:
    + chip->tsl2x7x_settings.als_thresh_low = val;
    + break;
    + default:
    + return -EINVAL;
    + }
    + } else {
    + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
    + case IIO_EV_DIR_RISING:
    + chip->tsl2x7x_settings.prox_thres_high = val;
    + break;
    + case IIO_EV_DIR_FALLING:
    + chip->tsl2x7x_settings.prox_thres_low = val;
    + break;
    + default:
    + return -EINVAL;
    + }
    + }
    +
    + tsl2x7x_invoke_change(indio_dev);
    +
    + return 0;
    +}
    +
    +static int tsl2x7x_read_thresh(struct iio_dev *indio_dev,
    + u64 event_code,
    + int *val)
    +{
    + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
    +
    + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) {
    + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
    + case IIO_EV_DIR_RISING:
    + *val = chip->tsl2x7x_settings.als_thresh_high;
    + break;
    + case IIO_EV_DIR_FALLING:
    + *val = chip->tsl2x7x_settings.als_thresh_low;
    + break;
    + default:
    + return -EINVAL;
    + }
    + } else {
    + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
    + case IIO_EV_DIR_RISING:
    + *val = chip->tsl2x7x_settings.prox_thres_high;
    + break;
    + case IIO_EV_DIR_FALLING:
    + *val = chip->tsl2x7x_settings.prox_thres_low;
    + break;
    + default:
    + return -EINVAL;
    + }
    + }
    +
    + return 0;
    +}
    +
    +static int tsl2x7x_read_raw(struct iio_dev *indio_dev,
    + struct iio_chan_spec const *chan,
    + int *val,
    + int *val2,
    + long mask)
    +{
    + int ret = -EINVAL;
    + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
    +
    + switch (mask) {
    + case IIO_CHAN_INFO_RAW:
    + switch (chan->type) {
    + case IIO_LIGHT:
    + tsl2x7x_get_lux(indio_dev);
    + *val = chip->als_cur_info.lux;
    + ret = IIO_VAL_INT;
    + break;
    + case IIO_INTENSITY:
    + tsl2x7x_get_lux(indio_dev);
    + if (chan->channel == 0)
    + *val = chip->als_cur_info.als_ch0;
    + else
    + *val = chip->als_cur_info.als_ch1;
    + ret = IIO_VAL_INT;
    + break;
    + case IIO_PROXIMITY:
    + tsl2x7x_get_prox(indio_dev);
    + *val = chip->prox_data;
    + ret = IIO_VAL_INT;
    + break;
    + default:
    + return -EINVAL;
    + break;
    + }
    + break;
    + case IIO_CHAN_INFO_CALIBSCALE:
    + if (chan->type == IIO_LIGHT)
    + *val =
    + tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain];
    + else
    + *val =
    + tsl2X7X_prx_gainadj[chip->tsl2x7x_settings.prox_gain];
    + ret = IIO_VAL_INT;
    + break;
    + case IIO_CHAN_INFO_CALIBBIAS:
    + *val = chip->tsl2x7x_settings.als_gain_trim;
    + ret = IIO_VAL_INT;
    + break;
    +
    + default:
    + ret = -EINVAL;
    + }
    +
    + return ret;
    +}
    +
    +static int tsl2x7x_write_raw(struct iio_dev *indio_dev,
    + struct iio_chan_spec const *chan,
    + int val,
    + int val2,
    + long mask)
    +{
    + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
    +
    + switch (mask) {
    + case IIO_CHAN_INFO_CALIBSCALE:
    + if (chan->type == IIO_INTENSITY) {
    + switch (val) {
    + 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:
    + switch (chip->id) {
    + case tsl2572:
    + case tsl2672:
    + case tmd2672:
    + case tsl2772:
    + case tmd2772:
    + return -EINVAL;
    + break;
    + }
    + chip->tsl2x7x_settings.als_gain = 3;
    + break;
    + case 128:
    + switch (chip->id) {
    + case tsl2571:
    + case tsl2671:
    + case tmd2671:
    + case tsl2771:
    + case tmd2771:
    + return -EINVAL;
    + break;
    + }
    + chip->tsl2x7x_settings.als_gain = 3;
    + break;
    + default:
    + return -EINVAL;
    + }
    + } else {
    + switch (val) {
    + 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:
    + return -EINVAL;
    + }
    + }
    + break;
    + case IIO_CHAN_INFO_CALIBBIAS:
    + chip->tsl2x7x_settings.als_gain_trim = val;
    + break;
    +
    + default:
    + return -EINVAL;
    + }
    +
    + tsl2x7x_invoke_change(indio_dev);
    +
    + return 0;
    +}
    +
    +static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR,
    + tsl2x7x_power_state_show, tsl2x7x_power_state_store);
    +
    +static DEVICE_ATTR(in_proximity0_calibscale_available, S_IRUGO,
    + tsl2x7x_prox_gain_available_show, NULL);
    +
    +static DEVICE_ATTR(in_illuminance0_calibscale_available, S_IRUGO,
    + tsl2x7x_gain_available_show, NULL);
    +
    +static DEVICE_ATTR(in_illuminance0_integration_time, S_IRUGO | S_IWUSR,
    + tsl2x7x_als_time_show, tsl2x7x_als_time_store);
    +
    +static DEVICE_ATTR(in_illuminance0_target_input, S_IRUGO | S_IWUSR,
    + tsl2x7x_als_cal_target_show, tsl2x7x_als_cal_target_store);
    +
    +static DEVICE_ATTR(in_illuminance0_calibrate, S_IWUSR, NULL,
    + tsl2x7x_do_calibrate);
    +
    +static DEVICE_ATTR(in_proximity0_calibrate, S_IWUSR, NULL,
    + tsl2x7x_do_prox_calibrate);
    +
    +static DEVICE_ATTR(in_illuminance0_lux_table, S_IRUGO | S_IWUSR,
    + tsl2x7x_luxtable_show, tsl2x7x_luxtable_store);
    +
    +static DEVICE_ATTR(in_intensity0_thresh_period, S_IRUGO | S_IWUSR,
    + tsl2x7x_als_persistence_show, tsl2x7x_als_persistence_store);
    +
    +static DEVICE_ATTR(in_proximity0_thresh_period, S_IRUGO | S_IWUSR,
    + tsl2x7x_prox_persistence_show, tsl2x7x_prox_persistence_store);
    +
    +/* Use the default register values to identify the Taos device */
    +static int tsl2x7x_device_id(unsigned char *id, int target)
    +{
    + switch (target) {
    + case tsl2571:
    + case tsl2671:
    + case tsl2771:
    + return ((*id & 0xf0) == TRITON_ID);
    + break;
    + case tmd2671:
    + case tmd2771:
    + return ((*id & 0xf0) == HALIBUT_ID);
    + break;
    + case tsl2572:
    + case tsl2672:
    + case tmd2672:
    + case tsl2772:
    + case tmd2772:
    + return ((*id & 0xf0) == SWORDFISH_ID);
    + break;
    + }
    +
    + return -EINVAL;
    +}
    +
    +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;
    + u8 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_get_prox(indio_dev); /* freshen data for ABI */
    + 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); /* freshen data for ABI */
    + 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 handled it. */
    + ret = i2c_smbus_write_byte(chip->client,
    + TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
    + TSL2X7X_CMD_PROXALS_INT_CLR);
    + if (ret < 0)
    + dev_err(&chip->client->dev,
    + "%s: Failed to clear irq from event handler. err = %d\n",
    + __func__, ret);
    +
    + return IRQ_HANDLED;
    +}
    +
    +static struct attribute *tsl2x7x_ALS_device_attrs[] = {
    + &dev_attr_power_state.attr,
    + &dev_attr_in_illuminance0_calibscale_available.attr,
    + &dev_attr_in_illuminance0_integration_time.attr,
    + &iio_const_attr_in_illuminance0_integration_time_available\
    + .dev_attr.attr,
    + &dev_attr_in_illuminance0_target_input.attr,
    + &dev_attr_in_illuminance0_calibrate.attr,
    + &dev_attr_in_illuminance0_lux_table.attr,
    + NULL
    +};
    +
    +static struct attribute *tsl2x7x_PRX_device_attrs[] = {
    + &dev_attr_power_state.attr,
    + &dev_attr_in_proximity0_calibrate.attr,
    + NULL
    +};
    +
    +static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = {
    + &dev_attr_power_state.attr,
    + &dev_attr_in_illuminance0_calibscale_available.attr,
    + &dev_attr_in_illuminance0_integration_time.attr,
    + &iio_const_attr_in_illuminance0_integration_time_available\
    + .dev_attr.attr,
    + &dev_attr_in_illuminance0_target_input.attr,
    + &dev_attr_in_illuminance0_calibrate.attr,
    + &dev_attr_in_illuminance0_lux_table.attr,
    + &dev_attr_in_proximity0_calibrate.attr,
    + NULL
    +};
    +
    +static struct attribute *tsl2x7x_PRX2_device_attrs[] = {
    + &dev_attr_power_state.attr,
    + &dev_attr_in_proximity0_calibrate.attr,
    + &dev_attr_in_proximity0_calibscale_available.attr,
    + NULL
    +};
    +
    +static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] = {
    + &dev_attr_power_state.attr,
    + &dev_attr_in_illuminance0_calibscale_available.attr,
    + &dev_attr_in_illuminance0_integration_time.attr,
    + &iio_const_attr_in_illuminance0_integration_time_available\
    + .dev_attr.attr,
    + &dev_attr_in_illuminance0_target_input.attr,
    + &dev_attr_in_illuminance0_calibrate.attr,
    + &dev_attr_in_illuminance0_lux_table.attr,
    + &dev_attr_in_proximity0_calibrate.attr,
    + &dev_attr_in_proximity0_calibscale_available.attr,
    + NULL
    +};
    +
    +static struct attribute *tsl2X7X_ALS_event_attrs[] = {
    + &dev_attr_in_intensity0_thresh_period.attr,
    + NULL,
    +};
    +static struct attribute *tsl2X7X_PRX_event_attrs[] = {
    + &dev_attr_in_proximity0_thresh_period.attr,
    + NULL,
    +};
    +
    +static struct attribute *tsl2X7X_ALSPRX_event_attrs[] = {
    + &dev_attr_in_intensity0_thresh_period.attr,
    + &dev_attr_in_proximity0_thresh_period.attr,
    + NULL,
    +};
    +
    +static const struct attribute_group tsl2X7X_device_attr_group_tbl[] = {
    + [ALS] = {
    + .attrs = tsl2x7x_ALS_device_attrs,
    + },
    + [PRX] = {
    + .attrs = tsl2x7x_PRX_device_attrs,
    + },
    + [ALSPRX] = {
    + .attrs = tsl2x7x_ALSPRX_device_attrs,
    + },
    + [PRX2] = {
    + .attrs = tsl2x7x_PRX2_device_attrs,
    + },
    + [ALSPRX2] = {
    + .attrs = tsl2x7x_ALSPRX2_device_attrs,
    + },
    +};
    +
    +static struct attribute_group tsl2X7X_event_attr_group_tbl[] = {
    + [ALS] = {
    + .attrs = tsl2X7X_ALS_event_attrs,
    + .name = "events",
    + },
    + [PRX] = {
    + .attrs = tsl2X7X_PRX_event_attrs,
    + .name = "events",
    + },
    + [ALSPRX] = {
    + .attrs = tsl2X7X_ALSPRX_event_attrs,
    + .name = "events",
    + },
    +};
    +
    +static const struct iio_info tsl2X7X_device_info[] = {
    + [ALS] = {
    + .attrs = &tsl2X7X_device_attr_group_tbl[ALS],
    + .event_attrs = &tsl2X7X_event_attr_group_tbl[ALS],
    + .driver_module = THIS_MODULE,
    + .read_raw = &tsl2x7x_read_raw,
    + .write_raw = &tsl2x7x_write_raw,
    + .read_event_value = &tsl2x7x_read_thresh,
    + .write_event_value = &tsl2x7x_write_thresh,
    + .read_event_config = &tsl2x7x_read_interrupt_config,
    + .write_event_config = &tsl2x7x_write_interrupt_config,
    + },
    + [PRX] = {
    + .attrs = &tsl2X7X_device_attr_group_tbl[PRX],
    + .event_attrs = &tsl2X7X_event_attr_group_tbl[PRX],
    + .driver_module = THIS_MODULE,
    + .read_raw = &tsl2x7x_read_raw,
    + .write_raw = &tsl2x7x_write_raw,
    + .read_event_value = &tsl2x7x_read_thresh,
    + .write_event_value = &tsl2x7x_write_thresh,
    + .read_event_config = &tsl2x7x_read_interrupt_config,
    + .write_event_config = &tsl2x7x_write_interrupt_config,
    + },
    + [ALSPRX] = {
    + .attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX],
    + .event_attrs = &tsl2X7X_event_attr_group_tbl[ALSPRX],
    + .driver_module = THIS_MODULE,
    + .read_raw = &tsl2x7x_read_raw,
    + .write_raw = &tsl2x7x_write_raw,
    + .read_event_value = &tsl2x7x_read_thresh,
    + .write_event_value = &tsl2x7x_write_thresh,
    + .read_event_config = &tsl2x7x_read_interrupt_config,
    + .write_event_config = &tsl2x7x_write_interrupt_config,
    + },
    + [PRX2] = {
    + .attrs = &tsl2X7X_device_attr_group_tbl[PRX2],
    + .event_attrs = &tsl2X7X_event_attr_group_tbl[PRX],
    + .driver_module = THIS_MODULE,
    + .read_raw = &tsl2x7x_read_raw,
    + .write_raw = &tsl2x7x_write_raw,
    + .read_event_value = &tsl2x7x_read_thresh,
    + .write_event_value = &tsl2x7x_write_thresh,
    + .read_event_config = &tsl2x7x_read_interrupt_config,
    + .write_event_config = &tsl2x7x_write_interrupt_config,
    + },
    + [ALSPRX2] = {
    + .attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX2],
    + .event_attrs = &tsl2X7X_event_attr_group_tbl[ALSPRX],
    + .driver_module = THIS_MODULE,
    + .read_raw = &tsl2x7x_read_raw,
    + .write_raw = &tsl2x7x_write_raw,
    + .read_event_value = &tsl2x7x_read_thresh,
    + .write_event_value = &tsl2x7x_write_thresh,
    + .read_event_config = &tsl2x7x_read_interrupt_config,
    + .write_event_config = &tsl2x7x_write_interrupt_config,
    + },
    +};
    +
    +static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
    + [ALS] = {
    + .channel = {
    + {
    + .type = IIO_LIGHT,
    + .indexed = 1,
    + .channel = 0,
    + .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT,
    + }, {
    + .type = IIO_INTENSITY,
    + .indexed = 1,
    + .channel = 0,
    + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
    + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
    + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
    + .event_mask = TSL2X7X_EVENT_MASK
    + }, {
    + .type = IIO_INTENSITY,
    + .indexed = 1,
    + .channel = 1,
    + },
    + },
    + .chan_table_elements = 3,
    + .info = &tsl2X7X_device_info[ALS],
    + },
    + [PRX] = {
    + .channel = {
    + {
    + .type = IIO_PROXIMITY,
    + .indexed = 1,
    + .channel = 0,
    + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
    + .event_mask = TSL2X7X_EVENT_MASK
    + },
    + },
    + .chan_table_elements = 1,
    + .info = &tsl2X7X_device_info[PRX],
    + },
    + [ALSPRX] = {
    + .channel = {
    + {
    + .type = IIO_LIGHT,
    + .indexed = 1,
    + .channel = 0,
    + .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT
    + }, {
    + .type = IIO_INTENSITY,
    + .indexed = 1,
    + .channel = 0,
    + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
    + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
    + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
    + .event_mask = TSL2X7X_EVENT_MASK
    + }, {
    + .type = IIO_INTENSITY,
    + .indexed = 1,
    + .channel = 1,
    + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
    + }, {
    + .type = IIO_PROXIMITY,
    + .indexed = 1,
    + .channel = 0,
    + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
    + .event_mask = TSL2X7X_EVENT_MASK
    + },
    + },
    + .chan_table_elements = 4,
    + .info = &tsl2X7X_device_info[ALSPRX],
    + },
    + [PRX2] = {
    + .channel = {
    + {
    + .type = IIO_PROXIMITY,
    + .indexed = 1,
    + .channel = 0,
    + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
    + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
    + .event_mask = TSL2X7X_EVENT_MASK
    + },
    + },
    + .chan_table_elements = 1,
    + .info = &tsl2X7X_device_info[PRX2],
    + },
    + [ALSPRX2] = {
    + .channel = {
    + {
    + .type = IIO_LIGHT,
    + .indexed = 1,
    + .channel = 0,
    + .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT,
    + }, {
    + .type = IIO_INTENSITY,
    + .indexed = 1,
    + .channel = 0,
    + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
    + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
    + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
    + .event_mask = TSL2X7X_EVENT_MASK
    + }, {
    + .type = IIO_INTENSITY,
    + .indexed = 1,
    + .channel = 1,
    + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
    + }, {
    + .type = IIO_PROXIMITY,
    + .indexed = 1,
    + .channel = 0,
    + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
    + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
    + .event_mask = TSL2X7X_EVENT_MASK
    + },
    + },
    + .chan_table_elements = 4,
    + .info = &tsl2X7X_device_info[ALSPRX2],
    + },
    +};
    +
    +static int __devinit tsl2x7x_probe(struct i2c_client *clientp,
    + const struct i2c_device_id *id)
    +{
    + int ret;
    + unsigned char device_id;
    + struct iio_dev *indio_dev;
    + struct tsl2X7X_chip *chip;
    +
    + indio_dev = iio_allocate_device(sizeof(*chip));
    + if (!indio_dev)
    + return -ENOMEM;
    +
    + chip = iio_priv(indio_dev);
    + chip->client = clientp;
    + i2c_set_clientdata(clientp, indio_dev);
    +
    + ret = tsl2x7x_i2c_read(chip->client,
    + TSL2X7X_CHIPID, &device_id);
    + if (ret < 0)
    + goto fail1;
    +
    + if ((!tsl2x7x_device_id(&device_id, id->driver_data)) ||
    + (tsl2x7x_device_id(&device_id, id->driver_data) == -EINVAL)) {
    + dev_info(&chip->client->dev,
    + "%s: i2c device found does not match expected id\n",
    + __func__);
    + goto fail1;
    + }
    +
    + ret = i2c_smbus_write_byte(clientp, (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
    + if (ret < 0) {
    + dev_err(&clientp->dev, "%s: write to cmd reg failed. err = %d\n",
    + __func__, ret);
    + goto fail1;
    + }
    +
    + /* ALS and PROX functions can be invoked via user space poll
    + * or H/W interrupt. If busy return last sample. */
    + mutex_init(&chip->als_mutex);
    + mutex_init(&chip->prox_mutex);
    +
    + chip->tsl2x7x_chip_status = TSL2X7X_CHIP_UNKNOWN;
    + chip->pdata = clientp->dev.platform_data;
    + chip->id = id->driver_data;
    + chip->chip_info =
    + &tsl2x7x_chip_info_tbl[device_channel_config[id->driver_data]];
    +
    + indio_dev->info = chip->chip_info->info;
    + indio_dev->dev.parent = &clientp->dev;
    + indio_dev->modes = INDIO_DIRECT_MODE;
    + indio_dev->name = chip->client->name;
    + indio_dev->channels = chip->chip_info->channel;
    + indio_dev->num_channels = chip->chip_info->chan_table_elements;
    +
    + 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,
    + "%s: irq request failed", __func__);
    + goto fail2;
    + }
    + }
    +
    + /* Load up the defaults */
    + tsl2x7x_defaults(chip);
    + /* Make sure the chip is on */
    + tsl2x7x_chip_on(indio_dev);
    +
    + ret = iio_device_register(indio_dev);
    + if (ret) {
    + dev_err(&clientp->dev,
    + "%s: iio registration failed\n", __func__);
    + goto fail1;
    + }
    +
    + dev_info(&clientp->dev, "%s Light sensor found.\n", id->name);
    +
    + return 0;
    +
    +fail1:
    + if (clientp->irq)
    + free_irq(clientp->irq, indio_dev);
    +fail2:
    + iio_free_device(indio_dev);
    +
    + return ret;
    +}
    +
    +static int tsl2x7x_suspend(struct device *dev)
    +{
    + struct iio_dev *indio_dev = dev_get_drvdata(dev);
    + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
    + int ret = 0;
    +
    + if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
    + ret = tsl2x7x_chip_off(indio_dev);
    + 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 *indio_dev = dev_get_drvdata(dev);
    + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
    + 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(indio_dev);
    +
    + return ret;
    +}
    +
    +static int __devexit tsl2x7x_remove(struct i2c_client *client)
    +{
    + struct tsl2X7X_chip *chip = i2c_get_clientdata(client);
    + struct iio_dev *indio_dev = iio_priv_to_dev(chip);
    +
    + tsl2x7x_chip_off(indio_dev);
    +
    + iio_device_unregister(indio_dev);
    + if (client->irq)
    + free_irq(client->irq, chip->client->name);
    +
    + iio_free_device(indio_dev);
    +
    + 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),
    +};
    +
    +module_i2c_driver(tsl2x7x_driver);
    +
    +MODULE_AUTHOR("J. August Brenner<jbrenner@taosinc.com>");
    +MODULE_DESCRIPTION("TAOS tsl2x7x ambient and proximity light sensor driver");
    +MODULE_LICENSE("GPL");
    --
    1.7.4.1
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