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    Subject[PATCH V5] TAOS tsl2x7x
    From
    Date
    TAOS device driver (version 5) for the tsl/tmd 2771 and 2772 device families (inc. all variants).

    Signed-off-by: Jon Brenner <jbrenner@taosinc.com>
    ---
    .../light/sysfs-bus-iio-light-tsl2583 | 6 +
    .../light/sysfs-bus-iio-light-tsl2x7x | 14 +
    drivers/staging/iio/Documentation/sysfs-bus-iio | 7 +
    .../staging/iio/Documentation/sysfs-bus-iio-light | 8 +-
    .../iio/Documentation/sysfs-bus-iio-light-tsl2583 | 20 -
    drivers/staging/iio/light/Kconfig | 8 +
    drivers/staging/iio/light/Makefile | 2 +
    drivers/staging/iio/light/tsl2x7x.h | 99 ++
    drivers/staging/iio/light/tsl2x7x_core.c | 1830 ++++++++++++++++++++
    9 files changed, 1970 insertions(+), 24 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 100644
    index 0000000..8f2a038
    --- /dev/null
    +++ b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583
    @@ -0,0 +1,6 @@
    +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.
    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 100644
    index 0000000..275ae54
    --- /dev/null
    +++ b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2x7x
    @@ -0,0 +1,14 @@
    +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]/proximity_calibrate
    +KernelVersion: 3.3-rc1
    +Contact: linux-iio@vger.kernel.org
    +Description:
    + Causes an 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 46a995d..5b2b5d3 100644
    --- a/drivers/staging/iio/Documentation/sysfs-bus-iio
    +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio
    @@ -258,6 +258,8 @@ 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/illuminance0_calibscale
    +what /sys/bus/iio/devices/iio:deviceX/proximity_calibscale
    KernelVersion: 2.6.35
    Contact: linux-iio@vger.kernel.org
    Description:
    @@ -457,6 +459,10 @@ What: /sys/.../events/in_voltageY_raw_thresh_falling_value
    What: /sys/.../events/in_voltageY_raw_thresh_falling_value
    What: /sys/.../events/in_tempY_raw_thresh_falling_value
    What: /sys/.../events/in_tempY_raw_thresh_falling_value
    +What: /sys/.../events/illuminance0_thresh_falling_value
    +what: /sys/.../events/illuminance0_thresh_rising_value
    +what: /sys/.../events/proximity_thresh_falling_value
    +what: /sys/.../events/proximity_thresh_rising_value
    KernelVersion: 2.6.37
    Contact: linux-iio@vger.kernel.org
    Description:
    @@ -739,3 +745,4 @@ Description:
    system. To minimize the current consumption of the system,
    the bridge can be disconnected (when it is not being used
    using the bridge_switch_en attribute.
    +
    diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-light b/drivers/staging/iio/Documentation/sysfs-bus-iio-light
    index edbf470..4385c70 100644
    --- a/drivers/staging/iio/Documentation/sysfs-bus-iio-light
    +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio-light
    @@ -76,10 +76,10 @@ 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]/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/Documentation/sysfs-bus-iio-light-tsl2583 b/drivers/staging/iio/Documentation/sysfs-bus-iio-light-tsl2583
    deleted file mode 100644
    index 660781d..0000000
    --- a/drivers/staging/iio/Documentation/sysfs-bus-iio-light-tsl2583
    +++ /dev/null
    @@ -1,20 +0,0 @@
    -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_input_target
    -KernelVersion: 2.6.37
    -Contact: linux-iio@vger.kernel.org
    -Description:
    - This property is the known externally illuminance (in lux).
    - It is used in the process of calibrating the device accuracy.
    diff --git a/drivers/staging/iio/light/Kconfig b/drivers/staging/iio/light/Kconfig
    index e7e9159..976f790 100644
    --- a/drivers/staging/iio/light/Kconfig
    +++ b/drivers/staging/iio/light/Kconfig
    @@ -31,4 +31,12 @@ 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 3011fbf..0b8fb22 100644
    --- a/drivers/staging/iio/light/Makefile
    +++ b/drivers/staging/iio/light/Makefile
    @@ -5,3 +5,5 @@
    obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o
    obj-$(CONFIG_SENSORS_ISL29018) += isl29018.o
    obj-$(CONFIG_TSL2583) += tsl2583.o
    +obj-$(CONFIG_TSL2x7x) += tsl2x7x_core.o
    +obj-$(CONFIG_TCS3x7x) += tcs3x7x_core.o
    diff --git a/drivers/staging/iio/light/tsl2x7x.h b/drivers/staging/iio/light/tsl2x7x.h
    new file mode 100644
    index 0000000..fe9e853
    --- /dev/null
    +++ b/drivers/staging/iio/light/tsl2x7x.h
    @@ -0,0 +1,99 @@
    +/*
    + * 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.
    + * @prx_time: 5.2ms prox integration time -
    + * dec in 2.7ms periods
    + * @wait_time: Time between PRX and ALS cycles
    + * in 2.7 periods
    + * @prox_config: Prox configuration filters.
    + * @als_gain_trim: default gain trim to account for
    + * aperture effects.
    + * @als_cal_target: Known external ALS reading for
    + * calibration.
    + * @als_thresh_low: CH0 'low' count to trigger interrupt.
    + * @als_thresh_high: CH0 'high' count to trigger interrupt.
    + * @persistence: H/W Filters, Number of 'out of limits'
    + * ADC readings PRX/ALS.
    + * @interrupts_en: Enable/Disable - 0x00 = none, 0x10 = als,
    + * 0x20 = prx, 0x30 = bth
    + * @prox_thres_low: Low threshold proximity detection.
    + * @prox_thres_high: High threshold proximity detection
    + * @prox_max_samples_cal: Used for prox cal.
    + * @prox_pulse_count: Number if proximity emitter pulses
    + */
    +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
    + * Platform PM functions.
    + */
    +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 100644
    index 0000000..267faab
    --- /dev/null
    +++ b/drivers/staging/iio/light/tsl2x7x_core.c
    @@ -0,0 +1,1830 @@
    +/*
    + * 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 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 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
    +
    +/*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
    +};
    +
    +/* Per-device data */
    +struct tsl2x7x_als_info {
    + u16 als_ch0;
    + u16 als_ch1;
    + u16 lux;
    +};
    +
    +struct prox_stat {
    + u16 min;
    + u16 max;
    + u16 mean;
    + unsigned long stddev;
    +};
    +
    +struct tsl2x7x_chip_info {
    + int chan_table_elements;
    + struct iio_chan_spec channel[9];
    + 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 = 200,
    + .als_gain = 0,
    + .prx_time = 0xfe, /*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 = 0xFF,
    + .interrupts_en = 0x00,
    + .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
    +};
    +
    +/*
    + * 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)
    +{
    + int ret;
    +
    + /* 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 */
    + *val = i2c_smbus_read_byte(client);
    +
    + return 0;
    +}
    +
    +/**
    + * tsl2x7x_get_lux() - Reads and calculates current lux value.
    + * @indio_dev: 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) {
    + 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, "%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 CMD_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 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,
    + "i2c_write_command failed in %s, 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 = 0;
    + 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, "Returning 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;
    +}
    +
    +/* Proximity poll function */
    +static int tsl2x7x_prox_poll(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;
    + }
    +
    + if (chip->id < tsl2572) {
    + if (!(status & TSL2X7X_STA_ADC_VALID))
    + goto prox_poll_err;
    + } else if (!(status & TSL2X7X_STA_PRX_VALID))
    + goto prox_poll_err;
    +
    + 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;
    +}
    +
    +/*
    + * Provides initial operational parameter defaults.
    + * These defaults may be changed through the device's sysfs files.
    + */
    +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);
    +
    +}
    +
    +/*
    + * 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,
    + "%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;
    +}
    +
    +/*
    + * 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.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 -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_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 in tsl2x7x_chip_on\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;
    +}
    +
    +/*
    + * 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 sample_min, sample_max, sample_sum, sample_mean;
    + unsigned long stddev;
    + int tmp;
    +
    + if (length == 0)
    + length = 1;
    +
    + sample_sum = 0;
    + sample_min = INT_MAX;
    + sample_max = INT_MIN;
    + for (i = 0; i < length; i++) {
    + sample_sum += data[i];
    + if (data[i] < sample_min)
    + sample_min = data[i];
    + if (data[i] > sample_max)
    + sample_max = data[i];
    + }
    + sample_mean = sample_sum/length;
    + statP->min = sample_min;
    + statP->max = sample_max;
    + statP->mean = sample_mean;
    +
    + sample_sum = 0;
    + for (i = 0; i < length; i++) {
    + tmp = data[i]-sample_mean;
    + sample_sum += tmp * tmp;
    + }
    + stddev = int_sqrt((long)sample_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,
    + "%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_prox_poll(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 iio_dev *indio_dev = dev_get_drvdata(dev);
    + struct tsl2X7X_chip *chip = iio_priv(indio_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_off(indio_dev);
    + else
    + tsl2x7x_chip_on(indio_dev);
    +
    + return len;
    +}
    +
    +static ssize_t tsl2x7x_gain_available_show(struct device *dev,
    + struct device_attribute *attr, char *buf)
    +{
    + struct iio_dev *indio_dev = dev_get_drvdata(dev);
    + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
    +
    + if (chip->id > tsl2771)
    + 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_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 *indio_dev = dev_get_drvdata(dev);
    + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
    +
    + 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 *indio_dev = dev_get_drvdata(dev);
    + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
    + 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 IIO_CONST_ATTR(illuminance0_integration_time_available,
    + "50 100 150 200 250 300 350 400 450 500 550 600 650");
    +
    +static ssize_t tsl2x7x_als_cal_target_show(struct device *dev,
    + struct device_attribute *attr, char *buf)
    +{
    + struct iio_dev *indio_dev = dev_get_drvdata(dev);
    + struct tsl2X7X_chip *chip = iio_priv(indio_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(indio_dev);
    + unsigned long value;
    +
    + if (kstrtoul(buf, 0, &value))
    + return -EINVAL;
    +
    + if (value)
    + chip->tsl2x7x_settings.als_cal_target = value;
    +
    + return len;
    +}
    +
    +/* sampling_frequency AKA persistence in data sheet */
    +static ssize_t tsl2x7x_persistence_show(struct device *dev,
    + struct device_attribute *attr, char *buf)
    +{
    + struct iio_dev *indio_dev = dev_get_drvdata(dev);
    + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
    +
    + return snprintf(buf, PAGE_SIZE, "%d\n",
    + chip->tsl2x7x_settings.persistence);
    +}
    +
    +static ssize_t tsl2x7x_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(indio_dev);
    + unsigned long value;
    +
    + if (kstrtoul(buf, 0, &value))
    + return -EINVAL;
    +
    + chip->tsl2x7x_settings.persistence = value;
    +
    + return len;
    +}
    +
    +static IIO_CONST_ATTR(sampling_frequency_available,
    + "0x00 - 0xFF (0 - 255)");
    +
    +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);
    +
    + return len;
    +}
    +
    +static ssize_t tsl2x7x_luxtable_show(struct device *dev,
    + struct device_attribute *attr, char *buf)
    +{
    + struct iio_dev *indio_dev = dev_get_drvdata(dev);
    + struct tsl2X7X_chip *chip = iio_priv(indio_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(indio_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));
    +
    + 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);
    +
    + 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;
    + }
    +
    + 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;
    + }
    + }
    +
    + 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 0:
    + 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_prox_poll(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:
    + if (chip->id > tsl2771)
    + return -EINVAL;
    + chip->tsl2x7x_settings.als_gain = 3;
    + break;
    + case 128:
    + if (chip->id < tsl2572)
    + return -EINVAL;
    + 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;
    + }
    +
    + return 0;
    +}
    +
    +static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR,
    + tsl2x7x_power_state_show, tsl2x7x_power_state_store);
    +
    +static DEVICE_ATTR(proximity_calibscale_available, S_IRUGO,
    + tsl2x7x_prox_gain_available_show, NULL);
    +
    +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_target_input, S_IRUGO | S_IWUSR,
    + tsl2x7x_als_cal_target_show, tsl2x7x_als_cal_target_store);
    +
    +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(sampling_frequency, S_IRUGO | S_IWUSR,
    + tsl2x7x_persistence_show, tsl2x7x_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;
    +}
    +
    +/*
    + * Interrupt Event Handler */
    +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 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_illuminance0_calibscale_available.attr,
    + &dev_attr_illuminance0_integration_time.attr,
    + &iio_const_attr_illuminance0_integration_time_available.dev_attr.attr,
    + &dev_attr_illuminance0_target_input.attr,
    + &dev_attr_illuminance0_calibrate.attr,
    + &dev_attr_illuminance0_lux_table.attr,
    + &dev_attr_sampling_frequency.attr,
    + &iio_const_attr_sampling_frequency_available.dev_attr.attr,
    + NULL
    +};
    +
    +static struct attribute *tsl2x7x_PRX_device_attrs[] = {
    + &dev_attr_power_state.attr,
    + &dev_attr_sampling_frequency.attr,
    + &iio_const_attr_sampling_frequency_available.dev_attr.attr,
    + &dev_attr_proximity_calibrate.attr,
    + NULL
    +};
    +
    +static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = {
    + &dev_attr_power_state.attr,
    + &dev_attr_illuminance0_calibscale_available.attr,
    + &dev_attr_illuminance0_integration_time.attr,
    + &iio_const_attr_illuminance0_integration_time_available.dev_attr.attr,
    + &dev_attr_illuminance0_target_input.attr,
    + &dev_attr_illuminance0_calibrate.attr,
    + &dev_attr_illuminance0_lux_table.attr,
    + &dev_attr_sampling_frequency.attr,
    + &iio_const_attr_sampling_frequency_available.dev_attr.attr,
    + &dev_attr_proximity_calibrate.attr,
    + NULL
    +};
    +
    +static struct attribute *tsl2x7x_PRX2_device_attrs[] = {
    + &dev_attr_power_state.attr,
    + &dev_attr_sampling_frequency.attr,
    + &iio_const_attr_sampling_frequency_available.dev_attr.attr,
    + &dev_attr_proximity_calibrate.attr,
    + &dev_attr_proximity_calibscale_available.attr,
    + NULL
    +};
    +
    +static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] = {
    + &dev_attr_power_state.attr,
    + &dev_attr_illuminance0_calibscale_available.attr,
    + &dev_attr_illuminance0_integration_time.attr,
    + &iio_const_attr_illuminance0_integration_time_available.dev_attr.attr,
    + &dev_attr_illuminance0_target_input.attr,
    + &dev_attr_illuminance0_calibrate.attr,
    + &dev_attr_illuminance0_lux_table.attr,
    + &dev_attr_sampling_frequency.attr,
    + &iio_const_attr_sampling_frequency_available.dev_attr.attr,
    + &dev_attr_proximity_calibrate.attr,
    + &dev_attr_proximity_calibscale_available.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 const struct iio_info tsl2X7X_device_info[] = {
    + [ALS] = {
    + .attrs = &tsl2X7X_device_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],
    + .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],
    + .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],
    + .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],
    + .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,
    + .processed_val = 1,
    + }, {
    + .type = IIO_INTENSITY,
    + .indexed = 1,
    + .channel = 0,
    + .info_mask = 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,
    + .event_mask = TSL2X7X_EVENT_MASK
    + },
    + },
    + .chan_table_elements = 1,
    + .info = &tsl2X7X_device_info[PRX],
    + },
    + [ALSPRX] = {
    + .channel = {
    + {
    + .type = IIO_LIGHT,
    + .indexed = 1,
    + .channel = 0,
    + .processed_val = 1,
    + }, {
    + .type = IIO_INTENSITY,
    + .indexed = 1,
    + .channel = 0,
    + .info_mask = IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
    + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
    + .event_mask = TSL2X7X_EVENT_MASK
    + }, {
    + .type = IIO_INTENSITY,
    + .indexed = 1,
    + .channel = 1,
    + }, {
    + .type = IIO_PROXIMITY,
    + .indexed = 1,
    + .channel = 0,
    + .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_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,
    + .processed_val = 1,
    + }, {
    + .type = IIO_INTENSITY,
    + .indexed = 1,
    + .channel = 0,
    + .info_mask = IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
    + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
    + .event_mask = TSL2X7X_EVENT_MASK
    + }, {
    + .type = IIO_INTENSITY,
    + .indexed = 1,
    + .channel = 1,
    + }, {
    + .type = IIO_PROXIMITY,
    + .indexed = 1,
    + .channel = 0,
    + .info_mask =
    + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
    + .event_mask = TSL2X7X_EVENT_MASK
    + },
    + },
    + .chan_table_elements = 4,
    + .info = &tsl2X7X_device_info[ALSPRX2],
    + },
    +};
    +
    +/*
    + * Client probe function.
    + */
    +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,
    + "i2c device found does not match expected id in %s\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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