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    SubjectRe: [PATCH v3 28/28] staging: iio: tsl2583: move out of staging
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    Date
    On 10/11/16 09:26, Brian Masney wrote:
    > Move tsl2580, tsl2581, tsl2583 driver out of staging into mainline.
    >
    > Signed-off-by: Brian Masney <masneyb@onstation.org>
    The rest of the series (that I haven't commented on) looks good to me.

    I'll pick them up once those few minor changes are sorted.

    Thanks,

    Jonathan
    > ---
    > .../ABI/testing/sysfs-bus-iio-light-tsl2583 | 20 +
    > drivers/iio/light/Kconfig | 7 +
    > drivers/iio/light/Makefile | 1 +
    > drivers/iio/light/tsl2583.c | 909 +++++++++++++++++++++
    > .../light/sysfs-bus-iio-light-tsl2583 | 20 -
    > drivers/staging/iio/light/Kconfig | 7 -
    > drivers/staging/iio/light/Makefile | 1 -
    > drivers/staging/iio/light/tsl2583.c | 909 ---------------------
    > 8 files changed, 937 insertions(+), 937 deletions(-)
    > create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-light-tsl2583
    > create mode 100644 drivers/iio/light/tsl2583.c
    > delete mode 100644 drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583
    > delete mode 100644 drivers/staging/iio/light/tsl2583.c
    >
    > diff --git a/Documentation/ABI/testing/sysfs-bus-iio-light-tsl2583 b/Documentation/ABI/testing/sysfs-bus-iio-light-tsl2583
    > new file mode 100644
    > index 0000000..a2e1996
    > --- /dev/null
    > +++ b/Documentation/ABI/testing/sysfs-bus-iio-light-tsl2583
    > @@ -0,0 +1,20 @@
    > +What: /sys/bus/iio/devices/device[n]/in_illuminance_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]/in_illuminance_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]/in_illuminance_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/iio/light/Kconfig b/drivers/iio/light/Kconfig
    > index d011720..298ea50 100644
    > --- a/drivers/iio/light/Kconfig
    > +++ b/drivers/iio/light/Kconfig
    > @@ -338,6 +338,13 @@ config SENSORS_TSL2563
    > This driver can also be built as a module. If so, the module
    > will be called tsl2563.
    >
    > +config TSL2583
    > + tristate "TAOS TSL2580, TSL2581 and TSL2583 light-to-digital converters"
    > + depends on I2C
    > + help
    > + Provides support for the TAOS tsl2580, tsl2581 and tsl2583 devices.
    > + Access ALS data via iio, sysfs.
    > +
    > config TSL4531
    > tristate "TAOS TSL4531 ambient light sensors"
    > depends on I2C
    > diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
    > index 15f24c5..4de5200 100644
    > --- a/drivers/iio/light/Makefile
    > +++ b/drivers/iio/light/Makefile
    > @@ -31,6 +31,7 @@ obj-$(CONFIG_SI1145) += si1145.o
    > obj-$(CONFIG_STK3310) += stk3310.o
    > obj-$(CONFIG_TCS3414) += tcs3414.o
    > obj-$(CONFIG_TCS3472) += tcs3472.o
    > +obj-$(CONFIG_TSL2583) += tsl2583.o
    > obj-$(CONFIG_TSL4531) += tsl4531.o
    > obj-$(CONFIG_US5182D) += us5182d.o
    > obj-$(CONFIG_VCNL4000) += vcnl4000.o
    > diff --git a/drivers/iio/light/tsl2583.c b/drivers/iio/light/tsl2583.c
    > new file mode 100644
    > index 0000000..b6da79b
    > --- /dev/null
    > +++ b/drivers/iio/light/tsl2583.c
    > @@ -0,0 +1,909 @@
    > +/*
    > + * Device driver for monitoring ambient light intensity (lux)
    > + * within the TAOS tsl258x family of devices (tsl2580, tsl2581, tsl2583).
    > + *
    > + * Copyright (c) 2011, TAOS Corporation.
    > + * Copyright (c) 2016 Brian Masney <masneyb@onstation.org>
    > + *
    > + * 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.
    > + */
    > +
    > +#include <linux/kernel.h>
    > +#include <linux/i2c.h>
    > +#include <linux/errno.h>
    > +#include <linux/delay.h>
    > +#include <linux/string.h>
    > +#include <linux/mutex.h>
    > +#include <linux/unistd.h>
    > +#include <linux/slab.h>
    > +#include <linux/module.h>
    > +#include <linux/iio/iio.h>
    > +#include <linux/iio/sysfs.h>
    > +
    > +/* Device Registers and Masks */
    > +#define TSL2583_CNTRL 0x00
    > +#define TSL2583_ALS_TIME 0X01
    > +#define TSL2583_INTERRUPT 0x02
    > +#define TSL2583_GAIN 0x07
    > +#define TSL2583_REVID 0x11
    > +#define TSL2583_CHIPID 0x12
    > +#define TSL2583_ALS_CHAN0LO 0x14
    > +#define TSL2583_ALS_CHAN0HI 0x15
    > +#define TSL2583_ALS_CHAN1LO 0x16
    > +#define TSL2583_ALS_CHAN1HI 0x17
    > +#define TSL2583_TMR_LO 0x18
    > +#define TSL2583_TMR_HI 0x19
    > +
    > +/* tsl2583 cmd reg masks */
    > +#define TSL2583_CMD_REG 0x80
    > +#define TSL2583_CMD_SPL_FN 0x60
    > +#define TSL2583_CMD_ALS_INT_CLR 0x01
    > +
    > +/* tsl2583 cntrl reg masks */
    > +#define TSL2583_CNTL_ADC_ENBL 0x02
    > +#define TSL2583_CNTL_PWR_OFF 0x00
    > +#define TSL2583_CNTL_PWR_ON 0x01
    > +
    > +/* tsl2583 status reg masks */
    > +#define TSL2583_STA_ADC_VALID 0x01
    > +#define TSL2583_STA_ADC_INTR 0x10
    > +
    > +/* Lux calculation constants */
    > +#define TSL2583_LUX_CALC_OVER_FLOW 65535
    > +
    > +#define TSL2583_INTERRUPT_DISABLED 0x00
    > +
    > +#define TSL2583_CHIP_ID 0x90
    > +#define TSL2583_CHIP_ID_MASK 0xf0
    > +
    > +/* Per-device data */
    > +struct tsl2583_als_info {
    > + u16 als_ch0;
    > + u16 als_ch1;
    > + u16 lux;
    > +};
    > +
    > +struct tsl2583_lux {
    > + unsigned int ratio;
    > + unsigned int ch0;
    > + unsigned int ch1;
    > +};
    > +
    > +static const struct tsl2583_lux tsl2583_default_lux[] = {
    > + { 9830, 8520, 15729 },
    > + { 12452, 10807, 23344 },
    > + { 14746, 6383, 11705 },
    > + { 17695, 4063, 6554 },
    > + { 0, 0, 0 } /* Termination segment */
    > +};
    > +
    > +#define TSL2583_MAX_LUX_TABLE_ENTRIES 11
    > +
    > +struct tsl2583_settings {
    > + int als_time;
    > + int als_gain;
    > + int als_gain_trim;
    > + int als_cal_target;
    > +
    > + /*
    > + * This structure is intentionally large to accommodate updates via
    > + * sysfs. Sized to 11 = max 10 segments + 1 termination segment.
    > + * Assumption is that one and only one type of glass used.
    > + */
    > + struct tsl2583_lux als_device_lux[TSL2583_MAX_LUX_TABLE_ENTRIES];
    > +};
    > +
    > +struct tsl2583_chip {
    > + struct mutex als_mutex;
    > + struct i2c_client *client;
    > + struct tsl2583_als_info als_cur_info;
    > + struct tsl2583_settings als_settings;
    > + int als_time_scale;
    > + int als_saturation;
    > + bool suspended;
    > +};
    > +
    > +struct gainadj {
    > + s16 ch0;
    > + s16 ch1;
    > + s16 mean;
    > +};
    > +
    > +/* Index = (0 - 3) Used to validate the gain selection index */
    > +static const struct gainadj gainadj[] = {
    > + { 1, 1, 1 },
    > + { 8, 8, 8 },
    > + { 16, 16, 16 },
    > + { 107, 115, 111 }
    > +};
    > +
    > +/*
    > + * Provides initial operational parameter defaults.
    > + * These defaults may be changed through the device's sysfs files.
    > + */
    > +static void tsl2583_defaults(struct tsl2583_chip *chip)
    > +{
    > + /*
    > + * The integration time must be a multiple of 50ms and within the
    > + * range [50, 600] ms.
    > + */
    > + chip->als_settings.als_time = 100;
    > +
    > + /*
    > + * This is an index into the gainadj table. Assume clear glass as the
    > + * default.
    > + */
    > + chip->als_settings.als_gain = 0;
    > +
    > + /* Default gain trim to account for aperture effects */
    > + chip->als_settings.als_gain_trim = 1000;
    > +
    > + /* Known external ALS reading used for calibration */
    > + chip->als_settings.als_cal_target = 130;
    > +
    > + /* Default lux table. */
    > + memcpy(chip->als_settings.als_device_lux, tsl2583_default_lux,
    > + sizeof(tsl2583_default_lux));
    > +}
    > +
    > +/*
    > + * Reads and calculates current lux value.
    > + * The raw ch0 and ch1 values of the ambient light sensed in the last
    > + * integration cycle are read from the device.
    > + * Time scale factor array values are adjusted based on the integration time.
    > + * The raw values are multiplied by a scale factor, and device gain is obtained
    > + * using gain index. Limit checks are done next, then the ratio of a multiple
    > + * of ch1 value, to the ch0 value, is calculated. The array als_device_lux[]
    > + * declared above is then scanned to find the first ratio value that is just
    > + * above the ratio we just calculated. The ch0 and ch1 multiplier constants in
    > + * the array are then used along with the time scale factor array values, to
    > + * calculate the lux.
    > + */
    > +static int tsl2583_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[5];
    > + struct tsl2583_lux *p;
    > + struct tsl2583_chip *chip = iio_priv(indio_dev);
    > + int i, ret;
    > +
    > + ret = i2c_smbus_read_byte_data(chip->client, TSL2583_CMD_REG);
    > + if (ret < 0) {
    > + dev_err(&chip->client->dev, "%s: failed to read CMD_REG register\n",
    > + __func__);
    > + goto done;
    > + }
    > +
    > + /* is data new & valid */
    > + if (!(ret & TSL2583_STA_ADC_INTR)) {
    > + dev_err(&chip->client->dev, "%s: data not valid; returning last value\n",
    > + __func__);
    > + ret = chip->als_cur_info.lux; /* return LAST VALUE */
    > + goto done;
    > + }
    > +
    > + for (i = 0; i < 4; i++) {
    > + int reg = TSL2583_CMD_REG | (TSL2583_ALS_CHAN0LO + i);
    > +
    > + ret = i2c_smbus_read_byte_data(chip->client, reg);
    > + if (ret < 0) {
    > + dev_err(&chip->client->dev, "%s: failed to read register %x\n",
    > + __func__, reg);
    > + goto done;
    > + }
    > + buf[i] = ret;
    > + }
    > +
    > + /*
    > + * Clear the pending interrupt status bit on the chip to allow the next
    > + * integration cycle to start. This has to be done even though this
    > + * driver currently does not support interrupts.
    > + */
    > + ret = i2c_smbus_write_byte(chip->client,
    > + (TSL2583_CMD_REG | TSL2583_CMD_SPL_FN |
    > + TSL2583_CMD_ALS_INT_CLR));
    > + if (ret < 0) {
    > + dev_err(&chip->client->dev, "%s: failed to clear the interrupt bit\n",
    > + __func__);
    > + goto done; /* have no data, so return failure */
    > + }
    > +
    > + /* extract ALS/lux data */
    > + ch0 = le16_to_cpup((const __le16 *)&buf[0]);
    > + ch1 = le16_to_cpup((const __le16 *)&buf[2]);
    > +
    > + chip->als_cur_info.als_ch0 = ch0;
    > + chip->als_cur_info.als_ch1 = ch1;
    > +
    > + if ((ch0 >= chip->als_saturation) || (ch1 >= chip->als_saturation))
    > + goto return_max;
    > +
    > + if (!ch0) {
    > + /* have no data, so return 0 */
    > + ret = 0;
    > + chip->als_cur_info.lux = 0;
    > + goto done;
    > + }
    > +
    > + /* calculate ratio */
    > + ratio = (ch1 << 15) / ch0;
    > +
    > + /* convert to unscaled lux using the pointer to the table */
    > + for (p = (struct tsl2583_lux *)chip->als_settings.als_device_lux;
    > + p->ratio != 0 && p->ratio < ratio; p++)
    > + ;
    > +
    > + if (p->ratio == 0) {
    > + lux = 0;
    > + } else {
    > + u32 ch0lux, ch1lux;
    > +
    > + ch0lux = ((ch0 * p->ch0) +
    > + (gainadj[chip->als_settings.als_gain].ch0 >> 1))
    > + / gainadj[chip->als_settings.als_gain].ch0;
    > + ch1lux = ((ch1 * p->ch1) +
    > + (gainadj[chip->als_settings.als_gain].ch1 >> 1))
    > + / gainadj[chip->als_settings.als_gain].ch1;
    > +
    > + /* note: lux is 31 bit max at this point */
    > + if (ch1lux > ch0lux) {
    > + dev_dbg(&chip->client->dev, "%s: No Data - Returning 0\n",
    > + __func__);
    > + ret = 0;
    > + chip->als_cur_info.lux = 0;
    > + goto done;
    > + }
    > +
    > + lux = ch0lux - ch1lux;
    > + }
    > +
    > + /* 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 tsl2583_default_lux tables above have a factor of 8192 built in,
    > + * so we need to shift right.
    > + * 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->als_settings.als_gain_trim;
    > + lux64 >>= 13;
    > + lux = lux64;
    > + lux = (lux + 500) / 1000;
    > +
    > + if (lux > TSL2583_LUX_CALC_OVER_FLOW) { /* check for overflow */
    > +return_max:
    > + lux = TSL2583_LUX_CALC_OVER_FLOW;
    > + }
    > +
    > + /* Update the structure with the latest VALID lux. */
    > + chip->als_cur_info.lux = lux;
    > + ret = lux;
    > +
    > +done:
    > + return ret;
    > +}
    > +
    > +/*
    > + * Obtain single reading and calculate the als_gain_trim (later used
    > + * to derive actual lux).
    > + * Return updated gain_trim value.
    > + */
    > +static int tsl2583_als_calibrate(struct iio_dev *indio_dev)
    > +{
    > + struct tsl2583_chip *chip = iio_priv(indio_dev);
    > + unsigned int gain_trim_val;
    > + int ret;
    > + int lux_val;
    > +
    > + ret = i2c_smbus_read_byte_data(chip->client,
    > + TSL2583_CMD_REG | TSL2583_CNTRL);
    > + if (ret < 0) {
    > + dev_err(&chip->client->dev,
    > + "%s: failed to read from the CNTRL register\n",
    > + __func__);
    > + return ret;
    > + }
    > +
    > + if ((ret & (TSL2583_CNTL_ADC_ENBL | TSL2583_CNTL_PWR_ON))
    > + != (TSL2583_CNTL_ADC_ENBL | TSL2583_CNTL_PWR_ON)) {
    > + dev_err(&chip->client->dev,
    > + "%s: Device is not powered on and/or ADC is not enabled\n",
    > + __func__);
    > + return -EINVAL;
    > + } else if ((ret & TSL2583_STA_ADC_VALID) != TSL2583_STA_ADC_VALID) {
    > + dev_err(&chip->client->dev,
    > + "%s: The two ADC channels have not completed an integration cycle\n",
    > + __func__);
    > + return -ENODATA;
    > + }
    > +
    > + lux_val = tsl2583_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 = (unsigned int)(((chip->als_settings.als_cal_target)
    > + * chip->als_settings.als_gain_trim) / lux_val);
    > + if ((gain_trim_val < 250) || (gain_trim_val > 4000)) {
    > + dev_err(&chip->client->dev,
    > + "%s: trim_val of %d is not within the range [250, 4000]\n",
    > + __func__, gain_trim_val);
    > + return -ENODATA;
    > + }
    > +
    > + chip->als_settings.als_gain_trim = (int)gain_trim_val;
    > +
    > + return 0;
    > +}
    > +
    > +static int tsl2583_set_als_time(struct tsl2583_chip *chip)
    > +{
    > + int als_count, als_time, ret;
    > + u8 val;
    > +
    > + /* determine als integration register */
    > + als_count = (chip->als_settings.als_time * 100 + 135) / 270;
    > + if (!als_count)
    > + als_count = 1; /* ensure at least one cycle */
    > +
    > + /* convert back to time (encompasses overrides) */
    > + als_time = (als_count * 27 + 5) / 10;
    > +
    > + val = 256 - als_count;
    > + ret = i2c_smbus_write_byte_data(chip->client,
    > + TSL2583_CMD_REG | TSL2583_ALS_TIME,
    > + val);
    > + if (ret < 0) {
    > + dev_err(&chip->client->dev, "%s: failed to set the als time to %d\n",
    > + __func__, val);
    > + return ret;
    > + }
    > +
    > + /* 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;
    > +
    > + return ret;
    > +}
    > +
    > +static int tsl2583_set_als_gain(struct tsl2583_chip *chip)
    > +{
    > + int ret;
    > +
    > + /* Set the gain based on als_settings struct */
    > + ret = i2c_smbus_write_byte_data(chip->client,
    > + TSL2583_CMD_REG | TSL2583_GAIN,
    > + chip->als_settings.als_gain);
    > + if (ret < 0)
    > + dev_err(&chip->client->dev,
    > + "%s: failed to set the gain to %d\n", __func__,
    > + chip->als_settings.als_gain);
    > +
    > + return ret;
    > +}
    > +
    > +static int tsl2583_set_power_state(struct tsl2583_chip *chip, u8 state)
    > +{
    > + int ret;
    > +
    > + ret = i2c_smbus_write_byte_data(chip->client,
    > + TSL2583_CMD_REG | TSL2583_CNTRL, state);
    > + if (ret < 0)
    > + dev_err(&chip->client->dev,
    > + "%s: failed to set the power state to %d\n", __func__,
    > + state);
    > +
    > + return ret;
    > +}
    > +
    > +/*
    > + * Turn the device on.
    > + * Configuration must be set before calling this function.
    > + */
    > +static int tsl2583_chip_init_and_power_on(struct iio_dev *indio_dev)
    > +{
    > + struct tsl2583_chip *chip = iio_priv(indio_dev);
    > + int ret;
    > +
    > + /* Power on the device; ADC off. */
    > + ret = tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_ON);
    > + if (ret < 0)
    > + return ret;
    > +
    > + ret = i2c_smbus_write_byte_data(chip->client,
    > + TSL2583_CMD_REG | TSL2583_INTERRUPT,
    > + TSL2583_INTERRUPT_DISABLED);
    > + if (ret < 0) {
    > + dev_err(&chip->client->dev,
    > + "%s: failed to disable interrupts\n", __func__);
    > + return ret;
    > + }
    > +
    > + ret = tsl2583_set_als_time(chip);
    > + if (ret < 0)
    > + return ret;
    > +
    > + ret = tsl2583_set_als_gain(chip);
    > + if (ret < 0)
    > + return ret;
    > +
    > + usleep_range(3000, 3500);
    > +
    > + ret = tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_ON |
    > + TSL2583_CNTL_ADC_ENBL);
    > + if (ret < 0)
    > + return ret;
    > +
    > + chip->suspended = false;
    > +
    > + return ret;
    > +}
    > +
    > +/* Sysfs Interface Functions */
    > +
    > +static ssize_t in_illuminance_input_target_show(struct device *dev,
    > + struct device_attribute *attr,
    > + char *buf)
    > +{
    > + struct iio_dev *indio_dev = dev_to_iio_dev(dev);
    > + struct tsl2583_chip *chip = iio_priv(indio_dev);
    > + int ret;
    > +
    > + mutex_lock(&chip->als_mutex);
    > + ret = sprintf(buf, "%d\n", chip->als_settings.als_cal_target);
    > + mutex_unlock(&chip->als_mutex);
    > +
    > + return ret;
    > +}
    > +
    > +static ssize_t in_illuminance_input_target_store(struct device *dev,
    > + struct device_attribute *attr,
    > + const char *buf, size_t len)
    > +{
    > + struct iio_dev *indio_dev = dev_to_iio_dev(dev);
    > + struct tsl2583_chip *chip = iio_priv(indio_dev);
    > + int value;
    > +
    > + if (kstrtoint(buf, 0, &value) || !value)
    > + return -EINVAL;
    > +
    > + mutex_lock(&chip->als_mutex);
    > + chip->als_settings.als_cal_target = value;
    > + mutex_unlock(&chip->als_mutex);
    > +
    > + return len;
    > +}
    > +
    > +static ssize_t in_illuminance_calibrate_store(struct device *dev,
    > + struct device_attribute *attr,
    > + const char *buf, size_t len)
    > +{
    > + struct iio_dev *indio_dev = dev_to_iio_dev(dev);
    > + struct tsl2583_chip *chip = iio_priv(indio_dev);
    > + int value, ret;
    > +
    > + if (kstrtoint(buf, 0, &value) || value != 1)
    > + return -EINVAL;
    > +
    > + mutex_lock(&chip->als_mutex);
    > +
    > + if (chip->suspended) {
    > + ret = -EBUSY;
    > + goto done;
    > + }
    > +
    > + ret = tsl2583_als_calibrate(indio_dev);
    > + if (ret < 0)
    > + goto done;
    > +
    > + ret = len;
    > +done:
    > + mutex_unlock(&chip->als_mutex);
    > +
    > + return ret;
    > +}
    > +
    > +static ssize_t in_illuminance_lux_table_show(struct device *dev,
    > + struct device_attribute *attr,
    > + char *buf)
    > +{
    > + struct iio_dev *indio_dev = dev_to_iio_dev(dev);
    > + struct tsl2583_chip *chip = iio_priv(indio_dev);
    > + unsigned int i;
    > + int offset = 0;
    > +
    > + for (i = 0; i < ARRAY_SIZE(chip->als_settings.als_device_lux); i++) {
    > + offset += sprintf(buf + offset, "%u,%u,%u,",
    > + chip->als_settings.als_device_lux[i].ratio,
    > + chip->als_settings.als_device_lux[i].ch0,
    > + chip->als_settings.als_device_lux[i].ch1);
    > + if (chip->als_settings.als_device_lux[i].ratio == 0) {
    > + /*
    > + * We just printed the first "0" entry.
    > + * Now get rid of the extra "," and break.
    > + */
    > + offset--;
    > + break;
    > + }
    > + }
    > +
    > + offset += sprintf(buf + offset, "\n");
    > +
    > + return offset;
    > +}
    > +
    > +static ssize_t in_illuminance_lux_table_store(struct device *dev,
    > + struct device_attribute *attr,
    > + const char *buf, size_t len)
    > +{
    > + struct iio_dev *indio_dev = dev_to_iio_dev(dev);
    > + struct tsl2583_chip *chip = iio_priv(indio_dev);
    > + const unsigned int max_ints = TSL2583_MAX_LUX_TABLE_ENTRIES * 3;
    > + int value[TSL2583_MAX_LUX_TABLE_ENTRIES * 3];
    > + int ret = -EINVAL;
    > + unsigned int n;
    > +
    > + mutex_lock(&chip->als_mutex);
    > +
    > + 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 > max_ints) {
    > + dev_err(dev,
    > + "%s: The number of entries in the lux table must be a multiple of 3 and within the range [6, %d]\n",
    > + __func__, max_ints);
    > + goto done;
    > + }
    > + if ((value[n - 2] | value[n - 1] | value[n]) != 0) {
    > + dev_err(dev, "%s: The last 3 entries in the lux table must be zeros.\n",
    > + __func__);
    > + goto done;
    > + }
    > +
    > + memcpy(chip->als_settings.als_device_lux, &value[1],
    > + value[0] * sizeof(unsigned int));
    > +
    > + ret = len;
    > +
    > +done:
    > + mutex_unlock(&chip->als_mutex);
    > +
    > + return ret;
    > +}
    > +
    > +static IIO_CONST_ATTR(in_illuminance_calibscale_available, "1 8 16 111");
    > +static IIO_CONST_ATTR(in_illuminance_integration_time_available,
    > + "0.000050 0.000100 0.000150 0.000200 0.000250 0.000300 0.000350 0.000400 0.000450 0.000500 0.000550 0.000600 0.000650");
    > +static IIO_DEVICE_ATTR_RW(in_illuminance_input_target, 0);
    > +static IIO_DEVICE_ATTR_WO(in_illuminance_calibrate, 0);
    > +static IIO_DEVICE_ATTR_RW(in_illuminance_lux_table, 0);
    > +
    > +static struct attribute *sysfs_attrs_ctrl[] = {
    > + &iio_const_attr_in_illuminance_calibscale_available.dev_attr.attr,
    > + &iio_const_attr_in_illuminance_integration_time_available.dev_attr.attr,
    > + &iio_dev_attr_in_illuminance_input_target.dev_attr.attr,
    > + &iio_dev_attr_in_illuminance_calibrate.dev_attr.attr,
    > + &iio_dev_attr_in_illuminance_lux_table.dev_attr.attr,
    > + NULL
    > +};
    > +
    > +static const struct attribute_group tsl2583_attribute_group = {
    > + .attrs = sysfs_attrs_ctrl,
    > +};
    > +
    > +static const struct iio_chan_spec tsl2583_channels[] = {
    > + {
    > + .type = IIO_LIGHT,
    > + .modified = 1,
    > + .channel2 = IIO_MOD_LIGHT_IR,
    > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
    > + },
    > + {
    > + .type = IIO_LIGHT,
    > + .modified = 1,
    > + .channel2 = IIO_MOD_LIGHT_BOTH,
    > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
    > + },
    > + {
    > + .type = IIO_LIGHT,
    > + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
    > + BIT(IIO_CHAN_INFO_CALIBBIAS) |
    > + BIT(IIO_CHAN_INFO_CALIBSCALE) |
    > + BIT(IIO_CHAN_INFO_INT_TIME),
    > + },
    > +};
    > +
    > +static int tsl2583_read_raw(struct iio_dev *indio_dev,
    > + struct iio_chan_spec const *chan,
    > + int *val, int *val2, long mask)
    > +{
    > + struct tsl2583_chip *chip = iio_priv(indio_dev);
    > + int ret = -EINVAL;
    > +
    > + mutex_lock(&chip->als_mutex);
    > +
    > + if (chip->suspended) {
    > + ret = -EBUSY;
    > + goto read_done;
    > + }
    > +
    > + switch (mask) {
    > + case IIO_CHAN_INFO_RAW:
    > + if (chan->type == IIO_LIGHT) {
    > + ret = tsl2583_get_lux(indio_dev);
    > + if (ret < 0)
    > + goto read_done;
    > +
    > + /*
    > + * From page 20 of the TSL2581, TSL2583 data
    > + * sheet (TAOS134 − MARCH 2011):
    > + *
    > + * One of the photodiodes (channel 0) is
    > + * sensitive to both visible and infrared light,
    > + * while the second photodiode (channel 1) is
    > + * sensitive primarily to infrared light.
    > + */
    > + if (chan->channel2 == IIO_MOD_LIGHT_BOTH)
    > + *val = chip->als_cur_info.als_ch0;
    > + else
    > + *val = chip->als_cur_info.als_ch1;
    > +
    > + ret = IIO_VAL_INT;
    > + }
    > + break;
    > + case IIO_CHAN_INFO_PROCESSED:
    > + if (chan->type == IIO_LIGHT) {
    > + ret = tsl2583_get_lux(indio_dev);
    > + if (ret < 0)
    > + goto read_done;
    > +
    > + *val = ret;
    > + ret = IIO_VAL_INT;
    > + }
    > + break;
    > + case IIO_CHAN_INFO_CALIBBIAS:
    > + if (chan->type == IIO_LIGHT) {
    > + *val = chip->als_settings.als_gain_trim;
    > + ret = IIO_VAL_INT;
    > + }
    > + break;
    > + case IIO_CHAN_INFO_CALIBSCALE:
    > + if (chan->type == IIO_LIGHT) {
    > + *val = gainadj[chip->als_settings.als_gain].mean;
    > + ret = IIO_VAL_INT;
    > + }
    > + break;
    > + case IIO_CHAN_INFO_INT_TIME:
    > + if (chan->type == IIO_LIGHT) {
    > + *val = 0;
    > + *val2 = chip->als_settings.als_time;
    > + ret = IIO_VAL_INT_PLUS_MICRO;
    > + }
    > + break;
    > + default:
    > + break;
    > + }
    > +
    > +read_done:
    > + mutex_unlock(&chip->als_mutex);
    > +
    > + return ret;
    > +}
    > +
    > +static int tsl2583_write_raw(struct iio_dev *indio_dev,
    > + struct iio_chan_spec const *chan,
    > + int val, int val2, long mask)
    > +{
    > + struct tsl2583_chip *chip = iio_priv(indio_dev);
    > + int ret = -EINVAL;
    > +
    > + mutex_lock(&chip->als_mutex);
    > +
    > + if (chip->suspended) {
    > + ret = -EBUSY;
    > + goto write_done;
    > + }
    > +
    > + switch (mask) {
    > + case IIO_CHAN_INFO_CALIBBIAS:
    > + if (chan->type == IIO_LIGHT) {
    > + chip->als_settings.als_gain_trim = val;
    > + ret = 0;
    > + }
    > + break;
    > + case IIO_CHAN_INFO_CALIBSCALE:
    > + if (chan->type == IIO_LIGHT) {
    > + unsigned int i;
    > +
    > + for (i = 0; i < ARRAY_SIZE(gainadj); i++) {
    > + if (gainadj[i].mean == val) {
    > + chip->als_settings.als_gain = i;
    > + ret = tsl2583_set_als_gain(chip);
    > + break;
    > + }
    > + }
    > + }
    > + break;
    > + case IIO_CHAN_INFO_INT_TIME:
    > + if (chan->type == IIO_LIGHT && !val && val2 >= 50 &&
    > + val2 <= 650 && !(val2 % 50)) {
    > + chip->als_settings.als_time = val2;
    > + ret = tsl2583_set_als_time(chip);
    > + }
    > + break;
    > + default:
    > + break;
    > + }
    > +
    > +write_done:
    > + mutex_unlock(&chip->als_mutex);
    > +
    > + return ret;
    > +}
    > +
    > +static const struct iio_info tsl2583_info = {
    > + .attrs = &tsl2583_attribute_group,
    > + .driver_module = THIS_MODULE,
    > + .read_raw = tsl2583_read_raw,
    > + .write_raw = tsl2583_write_raw,
    > +};
    > +
    > +static int tsl2583_probe(struct i2c_client *clientp,
    > + const struct i2c_device_id *idp)
    > +{
    > + int ret;
    > + struct tsl2583_chip *chip;
    > + struct iio_dev *indio_dev;
    > +
    > + if (!i2c_check_functionality(clientp->adapter,
    > + I2C_FUNC_SMBUS_BYTE_DATA)) {
    > + dev_err(&clientp->dev, "%s: i2c smbus byte data functionality is unsupported\n",
    > + __func__);
    > + return -EOPNOTSUPP;
    > + }
    > +
    > + indio_dev = devm_iio_device_alloc(&clientp->dev, sizeof(*chip));
    > + if (!indio_dev)
    > + return -ENOMEM;
    > +
    > + chip = iio_priv(indio_dev);
    > + chip->client = clientp;
    > + i2c_set_clientdata(clientp, indio_dev);
    > +
    > + mutex_init(&chip->als_mutex);
    > + chip->suspended = true;
    > +
    > + ret = i2c_smbus_read_byte_data(clientp,
    > + TSL2583_CMD_REG | TSL2583_CHIPID);
    > + if (ret < 0) {
    > + dev_err(&clientp->dev,
    > + "%s: failed to read the chip ID register\n", __func__);
    > + return ret;
    > + }
    > +
    > + if ((ret & TSL2583_CHIP_ID_MASK) != TSL2583_CHIP_ID) {
    > + dev_err(&clientp->dev, "%s: received an unknown chip ID %x\n",
    > + __func__, ret);
    > + return -EINVAL;
    > + }
    > +
    > + indio_dev->info = &tsl2583_info;
    > + indio_dev->channels = tsl2583_channels;
    > + indio_dev->num_channels = ARRAY_SIZE(tsl2583_channels);
    > + indio_dev->dev.parent = &clientp->dev;
    > + indio_dev->modes = INDIO_DIRECT_MODE;
    > + indio_dev->name = chip->client->name;
    > +
    > + ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev);
    > + if (ret) {
    > + dev_err(&clientp->dev, "%s: iio registration failed\n",
    > + __func__);
    > + return ret;
    > + }
    > +
    > + /* Load up the V2 defaults (these are hard coded defaults for now) */
    > + tsl2583_defaults(chip);
    > +
    > + /* Make sure the chip is on */
    > + ret = tsl2583_chip_init_and_power_on(indio_dev);
    > + if (ret < 0)
    > + return ret;
    > +
    > + dev_info(&clientp->dev, "Light sensor found.\n");
    > +
    > + return 0;
    > +}
    > +
    > +static int __maybe_unused tsl2583_suspend(struct device *dev)
    > +{
    > + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
    > + struct tsl2583_chip *chip = iio_priv(indio_dev);
    > + int ret;
    > +
    > + mutex_lock(&chip->als_mutex);
    > +
    > + ret = tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_OFF);
    > + chip->suspended = true;
    > +
    > + mutex_unlock(&chip->als_mutex);
    > +
    > + return ret;
    > +}
    > +
    > +static int __maybe_unused tsl2583_resume(struct device *dev)
    > +{
    > + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
    > + struct tsl2583_chip *chip = iio_priv(indio_dev);
    > + int ret;
    > +
    > + mutex_lock(&chip->als_mutex);
    > +
    > + ret = tsl2583_chip_init_and_power_on(indio_dev);
    > +
    > + mutex_unlock(&chip->als_mutex);
    > +
    > + return ret;
    > +}
    > +
    > +static SIMPLE_DEV_PM_OPS(tsl2583_pm_ops, tsl2583_suspend, tsl2583_resume);
    > +
    > +static struct i2c_device_id tsl2583_idtable[] = {
    > + { "tsl2580", 0 },
    > + { "tsl2581", 1 },
    > + { "tsl2583", 2 },
    > + {}
    > +};
    > +MODULE_DEVICE_TABLE(i2c, tsl2583_idtable);
    > +
    > +static const struct of_device_id tsl2583_of_match[] = {
    > + { .compatible = "amstaos,tsl2580", },
    > + { .compatible = "amstaos,tsl2581", },
    > + { .compatible = "amstaos,tsl2583", },
    > + { },
    > +};
    > +MODULE_DEVICE_TABLE(of, tsl2583_of_match);
    > +
    > +/* Driver definition */
    > +static struct i2c_driver tsl2583_driver = {
    > + .driver = {
    > + .name = "tsl2583",
    > + .pm = &tsl2583_pm_ops,
    > + .of_match_table = tsl2583_of_match,
    > + },
    > + .id_table = tsl2583_idtable,
    > + .probe = tsl2583_probe,
    > +};
    > +module_i2c_driver(tsl2583_driver);
    > +
    > +MODULE_AUTHOR("J. August Brenner <jbrenner@taosinc.com>");
    > +MODULE_AUTHOR("Brian Masney <masneyb@onstation.org>");
    > +MODULE_DESCRIPTION("TAOS tsl2583 ambient light sensor driver");
    > +MODULE_LICENSE("GPL");
    > diff --git a/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583 b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583
    > deleted file mode 100644
    > index a2e1996..0000000
    > --- a/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583
    > +++ /dev/null
    > @@ -1,20 +0,0 @@
    > -What: /sys/bus/iio/devices/device[n]/in_illuminance_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]/in_illuminance_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]/in_illuminance_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 dbf22d3..4fbf629 100644
    > --- a/drivers/staging/iio/light/Kconfig
    > +++ b/drivers/staging/iio/light/Kconfig
    > @@ -13,13 +13,6 @@ config SENSORS_ISL29028
    > Proximity value via iio. The ISL29028 provides the concurrent sensing
    > of ambient light and proximity.
    >
    > -config TSL2583
    > - tristate "TAOS TSL2580, TSL2581 and TSL2583 light-to-digital converters"
    > - depends on I2C
    > - help
    > - 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
    > diff --git a/drivers/staging/iio/light/Makefile b/drivers/staging/iio/light/Makefile
    > index 6480856..f8693e9 100644
    > --- a/drivers/staging/iio/light/Makefile
    > +++ b/drivers/staging/iio/light/Makefile
    > @@ -3,5 +3,4 @@
    > #
    >
    > obj-$(CONFIG_SENSORS_ISL29028) += isl29028.o
    > -obj-$(CONFIG_TSL2583) += tsl2583.o
    > obj-$(CONFIG_TSL2x7x) += tsl2x7x_core.o
    > diff --git a/drivers/staging/iio/light/tsl2583.c b/drivers/staging/iio/light/tsl2583.c
    > deleted file mode 100644
    > index b6da79b..0000000
    > --- a/drivers/staging/iio/light/tsl2583.c
    > +++ /dev/null
    > @@ -1,909 +0,0 @@
    > -/*
    > - * Device driver for monitoring ambient light intensity (lux)
    > - * within the TAOS tsl258x family of devices (tsl2580, tsl2581, tsl2583).
    > - *
    > - * Copyright (c) 2011, TAOS Corporation.
    > - * Copyright (c) 2016 Brian Masney <masneyb@onstation.org>
    > - *
    > - * 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.
    > - */
    > -
    > -#include <linux/kernel.h>
    > -#include <linux/i2c.h>
    > -#include <linux/errno.h>
    > -#include <linux/delay.h>
    > -#include <linux/string.h>
    > -#include <linux/mutex.h>
    > -#include <linux/unistd.h>
    > -#include <linux/slab.h>
    > -#include <linux/module.h>
    > -#include <linux/iio/iio.h>
    > -#include <linux/iio/sysfs.h>
    > -
    > -/* Device Registers and Masks */
    > -#define TSL2583_CNTRL 0x00
    > -#define TSL2583_ALS_TIME 0X01
    > -#define TSL2583_INTERRUPT 0x02
    > -#define TSL2583_GAIN 0x07
    > -#define TSL2583_REVID 0x11
    > -#define TSL2583_CHIPID 0x12
    > -#define TSL2583_ALS_CHAN0LO 0x14
    > -#define TSL2583_ALS_CHAN0HI 0x15
    > -#define TSL2583_ALS_CHAN1LO 0x16
    > -#define TSL2583_ALS_CHAN1HI 0x17
    > -#define TSL2583_TMR_LO 0x18
    > -#define TSL2583_TMR_HI 0x19
    > -
    > -/* tsl2583 cmd reg masks */
    > -#define TSL2583_CMD_REG 0x80
    > -#define TSL2583_CMD_SPL_FN 0x60
    > -#define TSL2583_CMD_ALS_INT_CLR 0x01
    > -
    > -/* tsl2583 cntrl reg masks */
    > -#define TSL2583_CNTL_ADC_ENBL 0x02
    > -#define TSL2583_CNTL_PWR_OFF 0x00
    > -#define TSL2583_CNTL_PWR_ON 0x01
    > -
    > -/* tsl2583 status reg masks */
    > -#define TSL2583_STA_ADC_VALID 0x01
    > -#define TSL2583_STA_ADC_INTR 0x10
    > -
    > -/* Lux calculation constants */
    > -#define TSL2583_LUX_CALC_OVER_FLOW 65535
    > -
    > -#define TSL2583_INTERRUPT_DISABLED 0x00
    > -
    > -#define TSL2583_CHIP_ID 0x90
    > -#define TSL2583_CHIP_ID_MASK 0xf0
    > -
    > -/* Per-device data */
    > -struct tsl2583_als_info {
    > - u16 als_ch0;
    > - u16 als_ch1;
    > - u16 lux;
    > -};
    > -
    > -struct tsl2583_lux {
    > - unsigned int ratio;
    > - unsigned int ch0;
    > - unsigned int ch1;
    > -};
    > -
    > -static const struct tsl2583_lux tsl2583_default_lux[] = {
    > - { 9830, 8520, 15729 },
    > - { 12452, 10807, 23344 },
    > - { 14746, 6383, 11705 },
    > - { 17695, 4063, 6554 },
    > - { 0, 0, 0 } /* Termination segment */
    > -};
    > -
    > -#define TSL2583_MAX_LUX_TABLE_ENTRIES 11
    > -
    > -struct tsl2583_settings {
    > - int als_time;
    > - int als_gain;
    > - int als_gain_trim;
    > - int als_cal_target;
    > -
    > - /*
    > - * This structure is intentionally large to accommodate updates via
    > - * sysfs. Sized to 11 = max 10 segments + 1 termination segment.
    > - * Assumption is that one and only one type of glass used.
    > - */
    > - struct tsl2583_lux als_device_lux[TSL2583_MAX_LUX_TABLE_ENTRIES];
    > -};
    > -
    > -struct tsl2583_chip {
    > - struct mutex als_mutex;
    > - struct i2c_client *client;
    > - struct tsl2583_als_info als_cur_info;
    > - struct tsl2583_settings als_settings;
    > - int als_time_scale;
    > - int als_saturation;
    > - bool suspended;
    > -};
    > -
    > -struct gainadj {
    > - s16 ch0;
    > - s16 ch1;
    > - s16 mean;
    > -};
    > -
    > -/* Index = (0 - 3) Used to validate the gain selection index */
    > -static const struct gainadj gainadj[] = {
    > - { 1, 1, 1 },
    > - { 8, 8, 8 },
    > - { 16, 16, 16 },
    > - { 107, 115, 111 }
    > -};
    > -
    > -/*
    > - * Provides initial operational parameter defaults.
    > - * These defaults may be changed through the device's sysfs files.
    > - */
    > -static void tsl2583_defaults(struct tsl2583_chip *chip)
    > -{
    > - /*
    > - * The integration time must be a multiple of 50ms and within the
    > - * range [50, 600] ms.
    > - */
    > - chip->als_settings.als_time = 100;
    > -
    > - /*
    > - * This is an index into the gainadj table. Assume clear glass as the
    > - * default.
    > - */
    > - chip->als_settings.als_gain = 0;
    > -
    > - /* Default gain trim to account for aperture effects */
    > - chip->als_settings.als_gain_trim = 1000;
    > -
    > - /* Known external ALS reading used for calibration */
    > - chip->als_settings.als_cal_target = 130;
    > -
    > - /* Default lux table. */
    > - memcpy(chip->als_settings.als_device_lux, tsl2583_default_lux,
    > - sizeof(tsl2583_default_lux));
    > -}
    > -
    > -/*
    > - * Reads and calculates current lux value.
    > - * The raw ch0 and ch1 values of the ambient light sensed in the last
    > - * integration cycle are read from the device.
    > - * Time scale factor array values are adjusted based on the integration time.
    > - * The raw values are multiplied by a scale factor, and device gain is obtained
    > - * using gain index. Limit checks are done next, then the ratio of a multiple
    > - * of ch1 value, to the ch0 value, is calculated. The array als_device_lux[]
    > - * declared above is then scanned to find the first ratio value that is just
    > - * above the ratio we just calculated. The ch0 and ch1 multiplier constants in
    > - * the array are then used along with the time scale factor array values, to
    > - * calculate the lux.
    > - */
    > -static int tsl2583_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[5];
    > - struct tsl2583_lux *p;
    > - struct tsl2583_chip *chip = iio_priv(indio_dev);
    > - int i, ret;
    > -
    > - ret = i2c_smbus_read_byte_data(chip->client, TSL2583_CMD_REG);
    > - if (ret < 0) {
    > - dev_err(&chip->client->dev, "%s: failed to read CMD_REG register\n",
    > - __func__);
    > - goto done;
    > - }
    > -
    > - /* is data new & valid */
    > - if (!(ret & TSL2583_STA_ADC_INTR)) {
    > - dev_err(&chip->client->dev, "%s: data not valid; returning last value\n",
    > - __func__);
    > - ret = chip->als_cur_info.lux; /* return LAST VALUE */
    > - goto done;
    > - }
    > -
    > - for (i = 0; i < 4; i++) {
    > - int reg = TSL2583_CMD_REG | (TSL2583_ALS_CHAN0LO + i);
    > -
    > - ret = i2c_smbus_read_byte_data(chip->client, reg);
    > - if (ret < 0) {
    > - dev_err(&chip->client->dev, "%s: failed to read register %x\n",
    > - __func__, reg);
    > - goto done;
    > - }
    > - buf[i] = ret;
    > - }
    > -
    > - /*
    > - * Clear the pending interrupt status bit on the chip to allow the next
    > - * integration cycle to start. This has to be done even though this
    > - * driver currently does not support interrupts.
    > - */
    > - ret = i2c_smbus_write_byte(chip->client,
    > - (TSL2583_CMD_REG | TSL2583_CMD_SPL_FN |
    > - TSL2583_CMD_ALS_INT_CLR));
    > - if (ret < 0) {
    > - dev_err(&chip->client->dev, "%s: failed to clear the interrupt bit\n",
    > - __func__);
    > - goto done; /* have no data, so return failure */
    > - }
    > -
    > - /* extract ALS/lux data */
    > - ch0 = le16_to_cpup((const __le16 *)&buf[0]);
    > - ch1 = le16_to_cpup((const __le16 *)&buf[2]);
    > -
    > - chip->als_cur_info.als_ch0 = ch0;
    > - chip->als_cur_info.als_ch1 = ch1;
    > -
    > - if ((ch0 >= chip->als_saturation) || (ch1 >= chip->als_saturation))
    > - goto return_max;
    > -
    > - if (!ch0) {
    > - /* have no data, so return 0 */
    > - ret = 0;
    > - chip->als_cur_info.lux = 0;
    > - goto done;
    > - }
    > -
    > - /* calculate ratio */
    > - ratio = (ch1 << 15) / ch0;
    > -
    > - /* convert to unscaled lux using the pointer to the table */
    > - for (p = (struct tsl2583_lux *)chip->als_settings.als_device_lux;
    > - p->ratio != 0 && p->ratio < ratio; p++)
    > - ;
    > -
    > - if (p->ratio == 0) {
    > - lux = 0;
    > - } else {
    > - u32 ch0lux, ch1lux;
    > -
    > - ch0lux = ((ch0 * p->ch0) +
    > - (gainadj[chip->als_settings.als_gain].ch0 >> 1))
    > - / gainadj[chip->als_settings.als_gain].ch0;
    > - ch1lux = ((ch1 * p->ch1) +
    > - (gainadj[chip->als_settings.als_gain].ch1 >> 1))
    > - / gainadj[chip->als_settings.als_gain].ch1;
    > -
    > - /* note: lux is 31 bit max at this point */
    > - if (ch1lux > ch0lux) {
    > - dev_dbg(&chip->client->dev, "%s: No Data - Returning 0\n",
    > - __func__);
    > - ret = 0;
    > - chip->als_cur_info.lux = 0;
    > - goto done;
    > - }
    > -
    > - lux = ch0lux - ch1lux;
    > - }
    > -
    > - /* 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 tsl2583_default_lux tables above have a factor of 8192 built in,
    > - * so we need to shift right.
    > - * 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->als_settings.als_gain_trim;
    > - lux64 >>= 13;
    > - lux = lux64;
    > - lux = (lux + 500) / 1000;
    > -
    > - if (lux > TSL2583_LUX_CALC_OVER_FLOW) { /* check for overflow */
    > -return_max:
    > - lux = TSL2583_LUX_CALC_OVER_FLOW;
    > - }
    > -
    > - /* Update the structure with the latest VALID lux. */
    > - chip->als_cur_info.lux = lux;
    > - ret = lux;
    > -
    > -done:
    > - return ret;
    > -}
    > -
    > -/*
    > - * Obtain single reading and calculate the als_gain_trim (later used
    > - * to derive actual lux).
    > - * Return updated gain_trim value.
    > - */
    > -static int tsl2583_als_calibrate(struct iio_dev *indio_dev)
    > -{
    > - struct tsl2583_chip *chip = iio_priv(indio_dev);
    > - unsigned int gain_trim_val;
    > - int ret;
    > - int lux_val;
    > -
    > - ret = i2c_smbus_read_byte_data(chip->client,
    > - TSL2583_CMD_REG | TSL2583_CNTRL);
    > - if (ret < 0) {
    > - dev_err(&chip->client->dev,
    > - "%s: failed to read from the CNTRL register\n",
    > - __func__);
    > - return ret;
    > - }
    > -
    > - if ((ret & (TSL2583_CNTL_ADC_ENBL | TSL2583_CNTL_PWR_ON))
    > - != (TSL2583_CNTL_ADC_ENBL | TSL2583_CNTL_PWR_ON)) {
    > - dev_err(&chip->client->dev,
    > - "%s: Device is not powered on and/or ADC is not enabled\n",
    > - __func__);
    > - return -EINVAL;
    > - } else if ((ret & TSL2583_STA_ADC_VALID) != TSL2583_STA_ADC_VALID) {
    > - dev_err(&chip->client->dev,
    > - "%s: The two ADC channels have not completed an integration cycle\n",
    > - __func__);
    > - return -ENODATA;
    > - }
    > -
    > - lux_val = tsl2583_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 = (unsigned int)(((chip->als_settings.als_cal_target)
    > - * chip->als_settings.als_gain_trim) / lux_val);
    > - if ((gain_trim_val < 250) || (gain_trim_val > 4000)) {
    > - dev_err(&chip->client->dev,
    > - "%s: trim_val of %d is not within the range [250, 4000]\n",
    > - __func__, gain_trim_val);
    > - return -ENODATA;
    > - }
    > -
    > - chip->als_settings.als_gain_trim = (int)gain_trim_val;
    > -
    > - return 0;
    > -}
    > -
    > -static int tsl2583_set_als_time(struct tsl2583_chip *chip)
    > -{
    > - int als_count, als_time, ret;
    > - u8 val;
    > -
    > - /* determine als integration register */
    > - als_count = (chip->als_settings.als_time * 100 + 135) / 270;
    > - if (!als_count)
    > - als_count = 1; /* ensure at least one cycle */
    > -
    > - /* convert back to time (encompasses overrides) */
    > - als_time = (als_count * 27 + 5) / 10;
    > -
    > - val = 256 - als_count;
    > - ret = i2c_smbus_write_byte_data(chip->client,
    > - TSL2583_CMD_REG | TSL2583_ALS_TIME,
    > - val);
    > - if (ret < 0) {
    > - dev_err(&chip->client->dev, "%s: failed to set the als time to %d\n",
    > - __func__, val);
    > - return ret;
    > - }
    > -
    > - /* 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;
    > -
    > - return ret;
    > -}
    > -
    > -static int tsl2583_set_als_gain(struct tsl2583_chip *chip)
    > -{
    > - int ret;
    > -
    > - /* Set the gain based on als_settings struct */
    > - ret = i2c_smbus_write_byte_data(chip->client,
    > - TSL2583_CMD_REG | TSL2583_GAIN,
    > - chip->als_settings.als_gain);
    > - if (ret < 0)
    > - dev_err(&chip->client->dev,
    > - "%s: failed to set the gain to %d\n", __func__,
    > - chip->als_settings.als_gain);
    > -
    > - return ret;
    > -}
    > -
    > -static int tsl2583_set_power_state(struct tsl2583_chip *chip, u8 state)
    > -{
    > - int ret;
    > -
    > - ret = i2c_smbus_write_byte_data(chip->client,
    > - TSL2583_CMD_REG | TSL2583_CNTRL, state);
    > - if (ret < 0)
    > - dev_err(&chip->client->dev,
    > - "%s: failed to set the power state to %d\n", __func__,
    > - state);
    > -
    > - return ret;
    > -}
    > -
    > -/*
    > - * Turn the device on.
    > - * Configuration must be set before calling this function.
    > - */
    > -static int tsl2583_chip_init_and_power_on(struct iio_dev *indio_dev)
    > -{
    > - struct tsl2583_chip *chip = iio_priv(indio_dev);
    > - int ret;
    > -
    > - /* Power on the device; ADC off. */
    > - ret = tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_ON);
    > - if (ret < 0)
    > - return ret;
    > -
    > - ret = i2c_smbus_write_byte_data(chip->client,
    > - TSL2583_CMD_REG | TSL2583_INTERRUPT,
    > - TSL2583_INTERRUPT_DISABLED);
    > - if (ret < 0) {
    > - dev_err(&chip->client->dev,
    > - "%s: failed to disable interrupts\n", __func__);
    > - return ret;
    > - }
    > -
    > - ret = tsl2583_set_als_time(chip);
    > - if (ret < 0)
    > - return ret;
    > -
    > - ret = tsl2583_set_als_gain(chip);
    > - if (ret < 0)
    > - return ret;
    > -
    > - usleep_range(3000, 3500);
    > -
    > - ret = tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_ON |
    > - TSL2583_CNTL_ADC_ENBL);
    > - if (ret < 0)
    > - return ret;
    > -
    > - chip->suspended = false;
    > -
    > - return ret;
    > -}
    > -
    > -/* Sysfs Interface Functions */
    > -
    > -static ssize_t in_illuminance_input_target_show(struct device *dev,
    > - struct device_attribute *attr,
    > - char *buf)
    > -{
    > - struct iio_dev *indio_dev = dev_to_iio_dev(dev);
    > - struct tsl2583_chip *chip = iio_priv(indio_dev);
    > - int ret;
    > -
    > - mutex_lock(&chip->als_mutex);
    > - ret = sprintf(buf, "%d\n", chip->als_settings.als_cal_target);
    > - mutex_unlock(&chip->als_mutex);
    > -
    > - return ret;
    > -}
    > -
    > -static ssize_t in_illuminance_input_target_store(struct device *dev,
    > - struct device_attribute *attr,
    > - const char *buf, size_t len)
    > -{
    > - struct iio_dev *indio_dev = dev_to_iio_dev(dev);
    > - struct tsl2583_chip *chip = iio_priv(indio_dev);
    > - int value;
    > -
    > - if (kstrtoint(buf, 0, &value) || !value)
    > - return -EINVAL;
    > -
    > - mutex_lock(&chip->als_mutex);
    > - chip->als_settings.als_cal_target = value;
    > - mutex_unlock(&chip->als_mutex);
    > -
    > - return len;
    > -}
    > -
    > -static ssize_t in_illuminance_calibrate_store(struct device *dev,
    > - struct device_attribute *attr,
    > - const char *buf, size_t len)
    > -{
    > - struct iio_dev *indio_dev = dev_to_iio_dev(dev);
    > - struct tsl2583_chip *chip = iio_priv(indio_dev);
    > - int value, ret;
    > -
    > - if (kstrtoint(buf, 0, &value) || value != 1)
    > - return -EINVAL;
    > -
    > - mutex_lock(&chip->als_mutex);
    > -
    > - if (chip->suspended) {
    > - ret = -EBUSY;
    > - goto done;
    > - }
    > -
    > - ret = tsl2583_als_calibrate(indio_dev);
    > - if (ret < 0)
    > - goto done;
    > -
    > - ret = len;
    > -done:
    > - mutex_unlock(&chip->als_mutex);
    > -
    > - return ret;
    > -}
    > -
    > -static ssize_t in_illuminance_lux_table_show(struct device *dev,
    > - struct device_attribute *attr,
    > - char *buf)
    > -{
    > - struct iio_dev *indio_dev = dev_to_iio_dev(dev);
    > - struct tsl2583_chip *chip = iio_priv(indio_dev);
    > - unsigned int i;
    > - int offset = 0;
    > -
    > - for (i = 0; i < ARRAY_SIZE(chip->als_settings.als_device_lux); i++) {
    > - offset += sprintf(buf + offset, "%u,%u,%u,",
    > - chip->als_settings.als_device_lux[i].ratio,
    > - chip->als_settings.als_device_lux[i].ch0,
    > - chip->als_settings.als_device_lux[i].ch1);
    > - if (chip->als_settings.als_device_lux[i].ratio == 0) {
    > - /*
    > - * We just printed the first "0" entry.
    > - * Now get rid of the extra "," and break.
    > - */
    > - offset--;
    > - break;
    > - }
    > - }
    > -
    > - offset += sprintf(buf + offset, "\n");
    > -
    > - return offset;
    > -}
    > -
    > -static ssize_t in_illuminance_lux_table_store(struct device *dev,
    > - struct device_attribute *attr,
    > - const char *buf, size_t len)
    > -{
    > - struct iio_dev *indio_dev = dev_to_iio_dev(dev);
    > - struct tsl2583_chip *chip = iio_priv(indio_dev);
    > - const unsigned int max_ints = TSL2583_MAX_LUX_TABLE_ENTRIES * 3;
    > - int value[TSL2583_MAX_LUX_TABLE_ENTRIES * 3];
    > - int ret = -EINVAL;
    > - unsigned int n;
    > -
    > - mutex_lock(&chip->als_mutex);
    > -
    > - 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 > max_ints) {
    > - dev_err(dev,
    > - "%s: The number of entries in the lux table must be a multiple of 3 and within the range [6, %d]\n",
    > - __func__, max_ints);
    > - goto done;
    > - }
    > - if ((value[n - 2] | value[n - 1] | value[n]) != 0) {
    > - dev_err(dev, "%s: The last 3 entries in the lux table must be zeros.\n",
    > - __func__);
    > - goto done;
    > - }
    > -
    > - memcpy(chip->als_settings.als_device_lux, &value[1],
    > - value[0] * sizeof(unsigned int));
    > -
    > - ret = len;
    > -
    > -done:
    > - mutex_unlock(&chip->als_mutex);
    > -
    > - return ret;
    > -}
    > -
    > -static IIO_CONST_ATTR(in_illuminance_calibscale_available, "1 8 16 111");
    > -static IIO_CONST_ATTR(in_illuminance_integration_time_available,
    > - "0.000050 0.000100 0.000150 0.000200 0.000250 0.000300 0.000350 0.000400 0.000450 0.000500 0.000550 0.000600 0.000650");
    > -static IIO_DEVICE_ATTR_RW(in_illuminance_input_target, 0);
    > -static IIO_DEVICE_ATTR_WO(in_illuminance_calibrate, 0);
    > -static IIO_DEVICE_ATTR_RW(in_illuminance_lux_table, 0);
    > -
    > -static struct attribute *sysfs_attrs_ctrl[] = {
    > - &iio_const_attr_in_illuminance_calibscale_available.dev_attr.attr,
    > - &iio_const_attr_in_illuminance_integration_time_available.dev_attr.attr,
    > - &iio_dev_attr_in_illuminance_input_target.dev_attr.attr,
    > - &iio_dev_attr_in_illuminance_calibrate.dev_attr.attr,
    > - &iio_dev_attr_in_illuminance_lux_table.dev_attr.attr,
    > - NULL
    > -};
    > -
    > -static const struct attribute_group tsl2583_attribute_group = {
    > - .attrs = sysfs_attrs_ctrl,
    > -};
    > -
    > -static const struct iio_chan_spec tsl2583_channels[] = {
    > - {
    > - .type = IIO_LIGHT,
    > - .modified = 1,
    > - .channel2 = IIO_MOD_LIGHT_IR,
    > - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
    > - },
    > - {
    > - .type = IIO_LIGHT,
    > - .modified = 1,
    > - .channel2 = IIO_MOD_LIGHT_BOTH,
    > - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
    > - },
    > - {
    > - .type = IIO_LIGHT,
    > - .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
    > - BIT(IIO_CHAN_INFO_CALIBBIAS) |
    > - BIT(IIO_CHAN_INFO_CALIBSCALE) |
    > - BIT(IIO_CHAN_INFO_INT_TIME),
    > - },
    > -};
    > -
    > -static int tsl2583_read_raw(struct iio_dev *indio_dev,
    > - struct iio_chan_spec const *chan,
    > - int *val, int *val2, long mask)
    > -{
    > - struct tsl2583_chip *chip = iio_priv(indio_dev);
    > - int ret = -EINVAL;
    > -
    > - mutex_lock(&chip->als_mutex);
    > -
    > - if (chip->suspended) {
    > - ret = -EBUSY;
    > - goto read_done;
    > - }
    > -
    > - switch (mask) {
    > - case IIO_CHAN_INFO_RAW:
    > - if (chan->type == IIO_LIGHT) {
    > - ret = tsl2583_get_lux(indio_dev);
    > - if (ret < 0)
    > - goto read_done;
    > -
    > - /*
    > - * From page 20 of the TSL2581, TSL2583 data
    > - * sheet (TAOS134 − MARCH 2011):
    > - *
    > - * One of the photodiodes (channel 0) is
    > - * sensitive to both visible and infrared light,
    > - * while the second photodiode (channel 1) is
    > - * sensitive primarily to infrared light.
    > - */
    > - if (chan->channel2 == IIO_MOD_LIGHT_BOTH)
    > - *val = chip->als_cur_info.als_ch0;
    > - else
    > - *val = chip->als_cur_info.als_ch1;
    > -
    > - ret = IIO_VAL_INT;
    > - }
    > - break;
    > - case IIO_CHAN_INFO_PROCESSED:
    > - if (chan->type == IIO_LIGHT) {
    > - ret = tsl2583_get_lux(indio_dev);
    > - if (ret < 0)
    > - goto read_done;
    > -
    > - *val = ret;
    > - ret = IIO_VAL_INT;
    > - }
    > - break;
    > - case IIO_CHAN_INFO_CALIBBIAS:
    > - if (chan->type == IIO_LIGHT) {
    > - *val = chip->als_settings.als_gain_trim;
    > - ret = IIO_VAL_INT;
    > - }
    > - break;
    > - case IIO_CHAN_INFO_CALIBSCALE:
    > - if (chan->type == IIO_LIGHT) {
    > - *val = gainadj[chip->als_settings.als_gain].mean;
    > - ret = IIO_VAL_INT;
    > - }
    > - break;
    > - case IIO_CHAN_INFO_INT_TIME:
    > - if (chan->type == IIO_LIGHT) {
    > - *val = 0;
    > - *val2 = chip->als_settings.als_time;
    > - ret = IIO_VAL_INT_PLUS_MICRO;
    > - }
    > - break;
    > - default:
    > - break;
    > - }
    > -
    > -read_done:
    > - mutex_unlock(&chip->als_mutex);
    > -
    > - return ret;
    > -}
    > -
    > -static int tsl2583_write_raw(struct iio_dev *indio_dev,
    > - struct iio_chan_spec const *chan,
    > - int val, int val2, long mask)
    > -{
    > - struct tsl2583_chip *chip = iio_priv(indio_dev);
    > - int ret = -EINVAL;
    > -
    > - mutex_lock(&chip->als_mutex);
    > -
    > - if (chip->suspended) {
    > - ret = -EBUSY;
    > - goto write_done;
    > - }
    > -
    > - switch (mask) {
    > - case IIO_CHAN_INFO_CALIBBIAS:
    > - if (chan->type == IIO_LIGHT) {
    > - chip->als_settings.als_gain_trim = val;
    > - ret = 0;
    > - }
    > - break;
    > - case IIO_CHAN_INFO_CALIBSCALE:
    > - if (chan->type == IIO_LIGHT) {
    > - unsigned int i;
    > -
    > - for (i = 0; i < ARRAY_SIZE(gainadj); i++) {
    > - if (gainadj[i].mean == val) {
    > - chip->als_settings.als_gain = i;
    > - ret = tsl2583_set_als_gain(chip);
    > - break;
    > - }
    > - }
    > - }
    > - break;
    > - case IIO_CHAN_INFO_INT_TIME:
    > - if (chan->type == IIO_LIGHT && !val && val2 >= 50 &&
    > - val2 <= 650 && !(val2 % 50)) {
    > - chip->als_settings.als_time = val2;
    > - ret = tsl2583_set_als_time(chip);
    > - }
    > - break;
    > - default:
    > - break;
    > - }
    > -
    > -write_done:
    > - mutex_unlock(&chip->als_mutex);
    > -
    > - return ret;
    > -}
    > -
    > -static const struct iio_info tsl2583_info = {
    > - .attrs = &tsl2583_attribute_group,
    > - .driver_module = THIS_MODULE,
    > - .read_raw = tsl2583_read_raw,
    > - .write_raw = tsl2583_write_raw,
    > -};
    > -
    > -static int tsl2583_probe(struct i2c_client *clientp,
    > - const struct i2c_device_id *idp)
    > -{
    > - int ret;
    > - struct tsl2583_chip *chip;
    > - struct iio_dev *indio_dev;
    > -
    > - if (!i2c_check_functionality(clientp->adapter,
    > - I2C_FUNC_SMBUS_BYTE_DATA)) {
    > - dev_err(&clientp->dev, "%s: i2c smbus byte data functionality is unsupported\n",
    > - __func__);
    > - return -EOPNOTSUPP;
    > - }
    > -
    > - indio_dev = devm_iio_device_alloc(&clientp->dev, sizeof(*chip));
    > - if (!indio_dev)
    > - return -ENOMEM;
    > -
    > - chip = iio_priv(indio_dev);
    > - chip->client = clientp;
    > - i2c_set_clientdata(clientp, indio_dev);
    > -
    > - mutex_init(&chip->als_mutex);
    > - chip->suspended = true;
    > -
    > - ret = i2c_smbus_read_byte_data(clientp,
    > - TSL2583_CMD_REG | TSL2583_CHIPID);
    > - if (ret < 0) {
    > - dev_err(&clientp->dev,
    > - "%s: failed to read the chip ID register\n", __func__);
    > - return ret;
    > - }
    > -
    > - if ((ret & TSL2583_CHIP_ID_MASK) != TSL2583_CHIP_ID) {
    > - dev_err(&clientp->dev, "%s: received an unknown chip ID %x\n",
    > - __func__, ret);
    > - return -EINVAL;
    > - }
    > -
    > - indio_dev->info = &tsl2583_info;
    > - indio_dev->channels = tsl2583_channels;
    > - indio_dev->num_channels = ARRAY_SIZE(tsl2583_channels);
    > - indio_dev->dev.parent = &clientp->dev;
    > - indio_dev->modes = INDIO_DIRECT_MODE;
    > - indio_dev->name = chip->client->name;
    > -
    > - ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev);
    > - if (ret) {
    > - dev_err(&clientp->dev, "%s: iio registration failed\n",
    > - __func__);
    > - return ret;
    > - }
    > -
    > - /* Load up the V2 defaults (these are hard coded defaults for now) */
    > - tsl2583_defaults(chip);
    > -
    > - /* Make sure the chip is on */
    > - ret = tsl2583_chip_init_and_power_on(indio_dev);
    > - if (ret < 0)
    > - return ret;
    > -
    > - dev_info(&clientp->dev, "Light sensor found.\n");
    > -
    > - return 0;
    > -}
    > -
    > -static int __maybe_unused tsl2583_suspend(struct device *dev)
    > -{
    > - struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
    > - struct tsl2583_chip *chip = iio_priv(indio_dev);
    > - int ret;
    > -
    > - mutex_lock(&chip->als_mutex);
    > -
    > - ret = tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_OFF);
    > - chip->suspended = true;
    > -
    > - mutex_unlock(&chip->als_mutex);
    > -
    > - return ret;
    > -}
    > -
    > -static int __maybe_unused tsl2583_resume(struct device *dev)
    > -{
    > - struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
    > - struct tsl2583_chip *chip = iio_priv(indio_dev);
    > - int ret;
    > -
    > - mutex_lock(&chip->als_mutex);
    > -
    > - ret = tsl2583_chip_init_and_power_on(indio_dev);
    > -
    > - mutex_unlock(&chip->als_mutex);
    > -
    > - return ret;
    > -}
    > -
    > -static SIMPLE_DEV_PM_OPS(tsl2583_pm_ops, tsl2583_suspend, tsl2583_resume);
    > -
    > -static struct i2c_device_id tsl2583_idtable[] = {
    > - { "tsl2580", 0 },
    > - { "tsl2581", 1 },
    > - { "tsl2583", 2 },
    > - {}
    > -};
    > -MODULE_DEVICE_TABLE(i2c, tsl2583_idtable);
    > -
    > -static const struct of_device_id tsl2583_of_match[] = {
    > - { .compatible = "amstaos,tsl2580", },
    > - { .compatible = "amstaos,tsl2581", },
    > - { .compatible = "amstaos,tsl2583", },
    > - { },
    > -};
    > -MODULE_DEVICE_TABLE(of, tsl2583_of_match);
    > -
    > -/* Driver definition */
    > -static struct i2c_driver tsl2583_driver = {
    > - .driver = {
    > - .name = "tsl2583",
    > - .pm = &tsl2583_pm_ops,
    > - .of_match_table = tsl2583_of_match,
    > - },
    > - .id_table = tsl2583_idtable,
    > - .probe = tsl2583_probe,
    > -};
    > -module_i2c_driver(tsl2583_driver);
    > -
    > -MODULE_AUTHOR("J. August Brenner <jbrenner@taosinc.com>");
    > -MODULE_AUTHOR("Brian Masney <masneyb@onstation.org>");
    > -MODULE_DESCRIPTION("TAOS tsl2583 ambient light sensor driver");
    > -MODULE_LICENSE("GPL");
    >

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      Last update: 2016-11-12 17:48    [W:4.530 / U:0.056 seconds]
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