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    Subject[PATCH 4/6] IIO:light:tsl2563 initial move out of staging.
    Date
    From: Amit Kucheria <amit.kucheria@verdurent.com>

    Driver has had all event related elements stripped out leaving just
    the raw sysfs reads for now.

    Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
    ---
    drivers/iio/Kconfig | 1 +
    drivers/iio/Makefile | 1 +
    drivers/iio/light/Kconfig | 16 +
    drivers/iio/light/Makefile | 6 +
    drivers/iio/light/tsl2563.c | 654 +++++++++++++++++++++++++++++++++++++++++++
    include/linux/iio/tsl2563.h | 8 +
    6 files changed, 686 insertions(+), 0 deletions(-)

    diff --git a/drivers/iio/Kconfig b/drivers/iio/Kconfig
    index f1e8a22..5dcd9e5 100644
    --- a/drivers/iio/Kconfig
    +++ b/drivers/iio/Kconfig
    @@ -12,5 +12,6 @@ menuconfig IIO
    if IIO

    source "drivers/iio/adc/Kconfig"
    +source "drivers/iio/light/Kconfig"

    endif # IIO
    diff --git a/drivers/iio/Makefile b/drivers/iio/Makefile
    index 42d6d12..0e59946 100644
    --- a/drivers/iio/Makefile
    +++ b/drivers/iio/Makefile
    @@ -6,3 +6,4 @@ obj-$(CONFIG_IIO) += iio.o
    industrialio-y := core.o

    obj-y += adc/
    +obj-y += light/
    diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
    new file mode 100644
    index 0000000..6282ce0
    --- /dev/null
    +++ b/drivers/iio/light/Kconfig
    @@ -0,0 +1,16 @@
    +#
    +# IIO Light Sensor Drivers
    +#
    +menu "Light Sensors"
    +
    +config IIO_TSL2563
    +tristate "TAOS TSL2560, TSL2561, TSL2562 and TSL2563 ambient light sensors"
    + depends on I2C
    + help
    + If you say yes here you get support for the Taos TSL2560,
    + TSL2561, TSL2562 and TSL2563 ambient light sensors.
    +
    + This driver can also be built as a module. If so, the module
    + will be called iio_tsl2563.
    +
    +endmenu
    diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
    new file mode 100644
    index 0000000..f7fe4fd
    --- /dev/null
    +++ b/drivers/iio/light/Makefile
    @@ -0,0 +1,6 @@
    +#
    +# Makefile for IIO Light Sensors
    +#
    +
    +iio_tsl2563-y := tsl2563.o
    +obj-$(CONFIG_IIO_MAX1363) += iio_tsl2563.o
    diff --git a/drivers/iio/light/tsl2563.c b/drivers/iio/light/tsl2563.c
    new file mode 100644
    index 0000000..c4abe07
    --- /dev/null
    +++ b/drivers/iio/light/tsl2563.c
    @@ -0,0 +1,654 @@
    +/*
    + * drivers/i2c/chips/tsl2563.c
    + *
    + * Copyright (C) 2008 Nokia Corporation
    + *
    + * Written by Timo O. Karjalainen <timo.o.karjalainen@nokia.com>
    + * Contact: Amit Kucheria <amit.kucheria@verdurent.com>
    + *
    + * Converted to IIO driver
    + * Amit Kucheria <amit.kucheria@verdurent.com>
    + *
    + * This program is free software; you can redistribute it and/or
    + * modify it under the terms of the GNU General Public License
    + * version 2 as published by the Free Software Foundation.
    + *
    + * 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 St, Fifth Floor, Boston, MA
    + * 02110-1301 USA
    + */
    +
    +#include <linux/module.h>
    +#include <linux/i2c.h>
    +#include <linux/sched.h>
    +#include <linux/mutex.h>
    +#include <linux/delay.h>
    +#include <linux/pm.h>
    +#include <linux/err.h>
    +#include <linux/slab.h>
    +
    +#include <linux/iio/iio.h>
    +#include <linux/iio/sysfs.h>
    +#include <linux/iio/tsl2563.h>
    +
    +/* Use this many bits for fraction part. */
    +#define ADC_FRAC_BITS (14)
    +
    +/* Given number of 1/10000's in ADC_FRAC_BITS precision. */
    +#define FRAC10K(f) (((f) * (1L << (ADC_FRAC_BITS))) / (10000))
    +
    +/* Bits used for fraction in calibration coefficients.*/
    +#define CALIB_FRAC_BITS (10)
    +/* 0.5 in CALIB_FRAC_BITS precision */
    +#define CALIB_FRAC_HALF (1 << (CALIB_FRAC_BITS - 1))
    +/* Make a fraction from a number n that was multiplied with b. */
    +#define CALIB_FRAC(n, b) (((n) << CALIB_FRAC_BITS) / (b))
    +/* Decimal 10^(digits in sysfs presentation) */
    +#define CALIB_BASE_SYSFS (1000)
    +
    +#define TSL2563_CMD (0x80)
    +#define TSL2563_CLEARINT (0x40)
    +
    +#define TSL2563_REG_CTRL (0x00)
    +#define TSL2563_REG_TIMING (0x01)
    +#define TSL2563_REG_LOWLOW (0x02) /* data0 low threshold, 2 bytes */
    +#define TSL2563_REG_LOWHIGH (0x03)
    +#define TSL2563_REG_HIGHLOW (0x04) /* data0 high threshold, 2 bytes */
    +#define TSL2563_REG_HIGHHIGH (0x05)
    +#define TSL2563_REG_INT (0x06)
    +#define TSL2563_REG_ID (0x0a)
    +#define TSL2563_REG_DATA0LOW (0x0c) /* broadband sensor value, 2 bytes */
    +#define TSL2563_REG_DATA0HIGH (0x0d)
    +#define TSL2563_REG_DATA1LOW (0x0e) /* infrared sensor value, 2 bytes */
    +#define TSL2563_REG_DATA1HIGH (0x0f)
    +
    +#define TSL2563_CMD_POWER_ON (0x03)
    +#define TSL2563_CMD_POWER_OFF (0x00)
    +#define TSL2563_CTRL_POWER_MASK (0x03)
    +
    +#define TSL2563_TIMING_13MS (0x00)
    +#define TSL2563_TIMING_100MS (0x01)
    +#define TSL2563_TIMING_400MS (0x02)
    +#define TSL2563_TIMING_MASK (0x03)
    +#define TSL2563_TIMING_GAIN16 (0x10)
    +#define TSL2563_TIMING_GAIN1 (0x00)
    +
    +#define TSL2563_INT_DISBLED (0x00)
    +#define TSL2563_INT_LEVEL (0x10)
    +#define TSL2563_INT_PERSIST(n) ((n) & 0x0F)
    +
    +struct tsl2563_gainlevel_coeff {
    + u8 gaintime;
    + u16 min;
    + u16 max;
    +};
    +
    +static const struct tsl2563_gainlevel_coeff tsl2563_gainlevel_table[] = {
    + {
    + .gaintime = TSL2563_TIMING_400MS | TSL2563_TIMING_GAIN16,
    + .min = 0,
    + .max = 65534,
    + }, {
    + .gaintime = TSL2563_TIMING_400MS | TSL2563_TIMING_GAIN1,
    + .min = 2048,
    + .max = 65534,
    + }, {
    + .gaintime = TSL2563_TIMING_100MS | TSL2563_TIMING_GAIN1,
    + .min = 4095,
    + .max = 37177,
    + }, {
    + .gaintime = TSL2563_TIMING_13MS | TSL2563_TIMING_GAIN1,
    + .min = 3000,
    + .max = 65535,
    + },
    +};
    +
    +struct tsl2563_chip {
    + struct mutex lock;
    + struct i2c_client *client;
    + struct delayed_work poweroff_work;
    +
    + /* Remember state for suspend and resume functions */
    + pm_message_t state;
    +
    + struct tsl2563_gainlevel_coeff const *gainlevel;
    +
    + /* Calibration coefficients */
    + u32 calib0;
    + u32 calib1;
    + int cover_comp_gain;
    +
    + /* Cache current values, to be returned while suspended */
    + u32 data0;
    + u32 data1;
    +};
    +
    +static int tsl2563_set_power(struct tsl2563_chip *chip, int on)
    +{
    + return i2c_smbus_write_byte_data(chip->client,
    + TSL2563_CMD | TSL2563_REG_CTRL,
    + on ?
    + TSL2563_CMD_POWER_ON :
    + TSL2563_CMD_POWER_OFF);
    +}
    +
    +/*
    + * Return value is 0 for off, 1 for on, or a negative error
    + * code if reading failed.
    + */
    +static int tsl2563_get_power(struct tsl2563_chip *chip)
    +{
    + int ret;
    +
    + ret = i2c_smbus_read_byte_data(chip->client,
    + TSL2563_CMD | TSL2563_REG_CTRL);
    + if (ret < 0)
    + return ret;
    +
    + return (ret & TSL2563_CTRL_POWER_MASK) == TSL2563_CMD_POWER_ON;
    +}
    +
    +static int tsl2563_configure(struct tsl2563_chip *chip)
    +{
    + return i2c_smbus_write_byte_data(chip->client,
    + TSL2563_CMD | TSL2563_REG_TIMING,
    + chip->gainlevel->gaintime);
    +}
    +
    +static void tsl2563_poweroff_work(struct work_struct *work)
    +{
    + struct tsl2563_chip *chip =
    + container_of(work, struct tsl2563_chip, poweroff_work.work);
    + tsl2563_set_power(chip, 0);
    +}
    +
    +static int tsl2563_detect(struct tsl2563_chip *chip)
    +{
    + int ret;
    +
    + ret = tsl2563_set_power(chip, 1);
    + if (ret)
    + return ret;
    +
    + ret = tsl2563_get_power(chip);
    + if (ret < 0)
    + return ret;
    +
    + return ret ? 0 : -ENODEV;
    +}
    +
    +/*
    + * "Normalized" ADC value is one obtained with 400ms of integration time and
    + * 16x gain. This function returns the number of bits of shift needed to
    + * convert between normalized values and HW values obtained using given
    + * timing and gain settings.
    + */
    +static int adc_shiftbits(u8 timing)
    +{
    + int shift = 0;
    +
    + switch (timing & TSL2563_TIMING_MASK) {
    + case TSL2563_TIMING_13MS:
    + shift += 5;
    + break;
    + case TSL2563_TIMING_100MS:
    + shift += 2;
    + break;
    + case TSL2563_TIMING_400MS:
    + /* no-op */
    + break;
    + }
    +
    + if (!(timing & TSL2563_TIMING_GAIN16))
    + shift += 4;
    +
    + return shift;
    +}
    +
    +/* Convert a HW ADC value to normalized scale. */
    +static u32 normalize_adc(u16 adc, u8 timing)
    +{
    + return adc << adc_shiftbits(timing);
    +}
    +
    +static void tsl2563_wait_adc(struct tsl2563_chip *chip)
    +{
    + unsigned int delay;
    +
    + switch (chip->gainlevel->gaintime & TSL2563_TIMING_MASK) {
    + case TSL2563_TIMING_13MS:
    + delay = 14;
    + break;
    + case TSL2563_TIMING_100MS:
    + delay = 101;
    + break;
    + default:
    + delay = 402;
    + }
    + /*
    + * TODO: Make sure that we wait at least required delay but why we
    + * have to extend it one tick more?
    + */
    + schedule_timeout_interruptible(msecs_to_jiffies(delay) + 2);
    +}
    +
    +static int tsl2563_adjust_gainlevel(struct tsl2563_chip *chip, u16 adc)
    +{
    + struct i2c_client *client = chip->client;
    +
    + if (adc > chip->gainlevel->max || adc < chip->gainlevel->min) {
    +
    + (adc > chip->gainlevel->max) ?
    + chip->gainlevel++ : chip->gainlevel--;
    +
    + i2c_smbus_write_byte_data(client,
    + TSL2563_CMD | TSL2563_REG_TIMING,
    + chip->gainlevel->gaintime);
    +
    + tsl2563_wait_adc(chip);
    + tsl2563_wait_adc(chip);
    +
    + return 1;
    + } else
    + return 0;
    +}
    +
    +static int tsl2563_get_adc(struct tsl2563_chip *chip)
    +{
    + struct i2c_client *client = chip->client;
    + u16 adc0, adc1;
    + int retry = 1;
    + int ret = 0;
    +
    + if (chip->state.event != PM_EVENT_ON)
    + goto out;
    +
    + cancel_delayed_work(&chip->poweroff_work);
    +
    + if (!tsl2563_get_power(chip)) {
    + ret = tsl2563_set_power(chip, 1);
    + if (ret)
    + goto out;
    + ret = tsl2563_configure(chip);
    + if (ret)
    + goto out;
    + tsl2563_wait_adc(chip);
    + }
    +
    + while (retry) {
    + ret = i2c_smbus_read_word_data(client,
    + TSL2563_CMD | TSL2563_REG_DATA0LOW);
    + if (ret < 0)
    + goto out;
    + adc0 = ret;
    +
    + ret = i2c_smbus_read_word_data(client,
    + TSL2563_CMD | TSL2563_REG_DATA1LOW);
    + if (ret < 0)
    + goto out;
    + adc1 = ret;
    +
    + retry = tsl2563_adjust_gainlevel(chip, adc0);
    + }
    +
    + chip->data0 = normalize_adc(adc0, chip->gainlevel->gaintime);
    + chip->data1 = normalize_adc(adc1, chip->gainlevel->gaintime);
    +
    +
    + ret = 0;
    +out:
    + return ret;
    +}
    +
    +static inline int calib_to_sysfs(u32 calib)
    +{
    + return (int) (((calib * CALIB_BASE_SYSFS) +
    + CALIB_FRAC_HALF) >> CALIB_FRAC_BITS);
    +}
    +
    +static inline u32 calib_from_sysfs(int value)
    +{
    + return (((u32) value) << CALIB_FRAC_BITS) / CALIB_BASE_SYSFS;
    +}
    +
    +/*
    + * Conversions between lux and ADC values.
    + *
    + * The basic formula is lux = c0 * adc0 - c1 * adc1, where c0 and c1 are
    + * appropriate constants. Different constants are needed for different
    + * kinds of light, determined by the ratio adc1/adc0 (basically the ratio
    + * of the intensities in infrared and visible wavelengths). lux_table below
    + * lists the upper threshold of the adc1/adc0 ratio and the corresponding
    + * constants.
    + */
    +
    +struct tsl2563_lux_coeff {
    + unsigned long ch_ratio;
    + unsigned long ch0_coeff;
    + unsigned long ch1_coeff;
    +};
    +
    +static const struct tsl2563_lux_coeff lux_table[] = {
    + {
    + .ch_ratio = FRAC10K(1300),
    + .ch0_coeff = FRAC10K(315),
    + .ch1_coeff = FRAC10K(262),
    + }, {
    + .ch_ratio = FRAC10K(2600),
    + .ch0_coeff = FRAC10K(337),
    + .ch1_coeff = FRAC10K(430),
    + }, {
    + .ch_ratio = FRAC10K(3900),
    + .ch0_coeff = FRAC10K(363),
    + .ch1_coeff = FRAC10K(529),
    + }, {
    + .ch_ratio = FRAC10K(5200),
    + .ch0_coeff = FRAC10K(392),
    + .ch1_coeff = FRAC10K(605),
    + }, {
    + .ch_ratio = FRAC10K(6500),
    + .ch0_coeff = FRAC10K(229),
    + .ch1_coeff = FRAC10K(291),
    + }, {
    + .ch_ratio = FRAC10K(8000),
    + .ch0_coeff = FRAC10K(157),
    + .ch1_coeff = FRAC10K(180),
    + }, {
    + .ch_ratio = FRAC10K(13000),
    + .ch0_coeff = FRAC10K(34),
    + .ch1_coeff = FRAC10K(26),
    + }, {
    + .ch_ratio = ULONG_MAX,
    + .ch0_coeff = 0,
    + .ch1_coeff = 0,
    + },
    +};
    +
    +/*
    + * Convert normalized, scaled ADC values to lux.
    + */
    +static unsigned int adc_to_lux(u32 adc0, u32 adc1)
    +{
    + const struct tsl2563_lux_coeff *lp = lux_table;
    + unsigned long ratio, lux, ch0 = adc0, ch1 = adc1;
    +
    + ratio = ch0 ? ((ch1 << ADC_FRAC_BITS) / ch0) : ULONG_MAX;
    +
    + while (lp->ch_ratio < ratio)
    + lp++;
    +
    + lux = ch0 * lp->ch0_coeff - ch1 * lp->ch1_coeff;
    +
    + return (unsigned int) (lux >> ADC_FRAC_BITS);
    +}
    +
    +/* Apply calibration coefficient to ADC count. */
    +static u32 calib_adc(u32 adc, u32 calib)
    +{
    + unsigned long scaled = adc;
    +
    + scaled *= calib;
    + scaled >>= CALIB_FRAC_BITS;
    +
    + return (u32) scaled;
    +}
    +
    +static int tsl2563_write_raw(struct iio_dev *indio_dev,
    + struct iio_chan_spec const *chan,
    + int val,
    + int val2,
    + long mask)
    +{
    + struct tsl2563_chip *chip = iio_priv(indio_dev);
    +
    + if (chan->channel == 0)
    + chip->calib0 = calib_from_sysfs(val);
    + else
    + chip->calib1 = calib_from_sysfs(val);
    +
    + return 0;
    +}
    +
    +static int tsl2563_read_raw(struct iio_dev *indio_dev,
    + struct iio_chan_spec const *chan,
    + int *val,
    + int *val2,
    + long m)
    +{
    + int ret = -EINVAL;
    + u32 calib0, calib1;
    + struct tsl2563_chip *chip = iio_priv(indio_dev);
    +
    + mutex_lock(&chip->lock);
    + switch (m) {
    + case 0:
    + switch (chan->type) {
    + case IIO_LIGHT:
    + ret = tsl2563_get_adc(chip);
    + if (ret)
    + goto error_ret;
    + calib0 = calib_adc(chip->data0, chip->calib0) *
    + chip->cover_comp_gain;
    + calib1 = calib_adc(chip->data1, chip->calib1) *
    + chip->cover_comp_gain;
    + *val = adc_to_lux(calib0, calib1);
    + ret = IIO_VAL_INT;
    + break;
    + case IIO_INTENSITY:
    + ret = tsl2563_get_adc(chip);
    + if (ret)
    + goto error_ret;
    + if (chan->channel == 0)
    + *val = chip->data0;
    + else
    + *val = chip->data1;
    + ret = IIO_VAL_INT;
    + break;
    + default:
    + break;
    + }
    + break;
    +
    + case IIO_CHAN_INFO_CALIBSCALE:
    + if (chan->channel == 0)
    + *val = calib_to_sysfs(chip->calib0);
    + else
    + *val = calib_to_sysfs(chip->calib1);
    + ret = IIO_VAL_INT;
    + break;
    + default:
    + return -EINVAL;
    + }
    +
    +error_ret:
    + mutex_unlock(&chip->lock);
    + return ret;
    +}
    +
    +static const struct iio_chan_spec tsl2563_channels[] = {
    + {
    + .type = IIO_LIGHT,
    + .indexed = 1,
    + .channel = 0,
    + }, {
    + .type = IIO_INTENSITY,
    + .modified = 1,
    + .channel2 = IIO_MOD_LIGHT_BOTH,
    + .info_mask = IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
    + }, {
    + .type = IIO_INTENSITY,
    + .modified = 1,
    + .channel2 = IIO_MOD_LIGHT_INFRARED,
    + .info_mask = IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
    + }
    +};
    +
    +static const struct iio_info tsl2563_info = {
    + .driver_module = THIS_MODULE,
    + .read_raw = &tsl2563_read_raw,
    + .write_raw = &tsl2563_write_raw,
    +};
    +
    +static int __devinit tsl2563_probe(struct i2c_client *client,
    + const struct i2c_device_id *device_id)
    +{
    + struct iio_dev *indio_dev;
    + struct tsl2563_chip *chip;
    + struct tsl2563_platform_data *pdata = client->dev.platform_data;
    + int err = 0;
    + int ret;
    + u8 id = 0;
    +
    + indio_dev = iio_device_allocate(sizeof(*chip));
    + if (!indio_dev)
    + return -ENOMEM;
    +
    + chip = iio_priv(indio_dev);
    +
    + i2c_set_clientdata(client, indio_dev);
    + chip->client = client;
    +
    + err = tsl2563_detect(chip);
    + if (err) {
    + dev_err(&client->dev, "device not found, error %d\n", -err);
    + goto fail1;
    + }
    +
    + /* Check we can read the id */
    + err = i2c_smbus_read_byte_data(chip->client,
    + TSL2563_CMD | TSL2563_REG_ID);
    + if (err < 0)
    + goto fail1;
    +
    + mutex_init(&chip->lock);
    +
    + /* Default values used until userspace says otherwise */
    + chip->gainlevel = tsl2563_gainlevel_table;
    + chip->calib0 = calib_from_sysfs(CALIB_BASE_SYSFS);
    + chip->calib1 = calib_from_sysfs(CALIB_BASE_SYSFS);
    +
    + if (pdata)
    + chip->cover_comp_gain = pdata->cover_comp_gain;
    + else
    + chip->cover_comp_gain = 1;
    +
    + dev_info(&client->dev, "model %d, rev. %d\n", id >> 4, id & 0x0f);
    + indio_dev->name = client->name;
    + indio_dev->channels = tsl2563_channels;
    + indio_dev->num_channels = ARRAY_SIZE(tsl2563_channels);
    + indio_dev->dev.parent = &client->dev;
    + indio_dev->info = &tsl2563_info;
    + ret = iio_device_register(indio_dev);
    + if (ret)
    + goto fail1;
    + err = tsl2563_configure(chip);
    + if (err)
    + goto fail2;
    +
    + INIT_DELAYED_WORK(&chip->poweroff_work, tsl2563_poweroff_work);
    +
    + schedule_delayed_work(&chip->poweroff_work, 5 * HZ);
    +
    + return 0;
    +fail2:
    + iio_device_unregister(indio_dev);
    +fail1:
    + kfree(chip);
    + return err;
    +}
    +
    +static int tsl2563_remove(struct i2c_client *client)
    +{
    + struct iio_dev *indio_dev = i2c_get_clientdata(client);
    + struct tsl2563_chip *chip = iio_priv(indio_dev);
    +
    + iio_device_unregister(indio_dev);
    + tsl2563_set_power(chip, 0);
    + iio_device_free(indio_dev);
    +
    + return 0;
    +}
    +
    +static int tsl2563_suspend(struct i2c_client *client, pm_message_t state)
    +{
    + struct iio_dev *indio_dev = i2c_get_clientdata(client);
    + struct tsl2563_chip *chip = iio_priv(indio_dev);
    + int ret;
    +
    + mutex_lock(&chip->lock);
    +
    + ret = tsl2563_set_power(chip, 0);
    + if (ret)
    + goto out;
    +
    + chip->state = state;
    +
    +out:
    + mutex_unlock(&chip->lock);
    + return ret;
    +}
    +
    +static int tsl2563_resume(struct i2c_client *client)
    +{
    + struct iio_dev *indio_dev = i2c_get_clientdata(client);
    + struct tsl2563_chip *chip = iio_priv(indio_dev);
    + int ret;
    +
    + mutex_lock(&chip->lock);
    +
    + ret = tsl2563_set_power(chip, 1);
    + if (ret)
    + goto out;
    +
    + ret = tsl2563_configure(chip);
    + if (ret)
    + goto out;
    +
    + chip->state.event = PM_EVENT_ON;
    +
    +out:
    + mutex_unlock(&chip->lock);
    + return ret;
    +}
    +
    +static const struct i2c_device_id tsl2563_id[] = {
    + { "tsl2560", 0 },
    + { "tsl2561", 0 },
    + { "tsl2562", 0 },
    + { "tsl2563", 0 },
    + {}
    +};
    +MODULE_DEVICE_TABLE(i2c, tsl2563_id);
    +
    +static struct i2c_driver tsl2563_i2c_driver = {
    + .driver = {
    + .name = "tsl2563",
    + },
    + .suspend = tsl2563_suspend,
    + .resume = tsl2563_resume,
    + .probe = tsl2563_probe,
    + .remove = __devexit_p(tsl2563_remove),
    + .id_table = tsl2563_id,
    +};
    +
    +static int __init tsl2563_init(void)
    +{
    + return i2c_add_driver(&tsl2563_i2c_driver);
    +}
    +module_init(tsl2563_init);
    +
    +static void __exit tsl2563_exit(void)
    +{
    + i2c_del_driver(&tsl2563_i2c_driver);
    +}
    +module_exit(tsl2563_exit);
    +
    +MODULE_AUTHOR("Nokia Corporation");
    +MODULE_DESCRIPTION("tsl2563 light sensor driver");
    +MODULE_LICENSE("GPL");
    diff --git a/include/linux/iio/tsl2563.h b/include/linux/iio/tsl2563.h
    new file mode 100644
    index 0000000..3e503cd
    --- /dev/null
    +++ b/include/linux/iio/tsl2563.h
    @@ -0,0 +1,8 @@
    +#ifndef _TSL2563_H_
    +#define _TSL2563_H_
    +
    +struct tsl2563_platform_data {
    + int cover_comp_gain;
    +};
    +
    +#endif /* _TSL2563_H_ */
    --
    1.7.7.2


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