iio:light:tsl2563 move out of staging
authorJonathan Cameron <jic23@kernel.org>
Sat, 12 Jan 2013 10:35:00 +0000 (10:35 +0000)
committerJonathan Cameron <jic23@kernel.org>
Sun, 27 Jan 2013 17:37:24 +0000 (17:37 +0000)
This driver is simple, uses the latest interfaces and contains few if
any controversial elements.  All of its interfaces have been in place
for a long time now.  Hence let's move it out of staging.

Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Acked-by: Peter Meerwald <pmeerw@pmeerw.net>
arch/arm/mach-omap2/board-rx51-peripherals.c
drivers/iio/light/Kconfig
drivers/iio/light/Makefile
drivers/iio/light/tsl2563.c [new file with mode: 0644]
drivers/staging/iio/light/Kconfig
drivers/staging/iio/light/Makefile
drivers/staging/iio/light/tsl2563.c [deleted file]
drivers/staging/iio/light/tsl2563.h [deleted file]
include/linux/platform_data/tsl2563.h [new file with mode: 0644]

index cf07e289b4eadb494f942ca966b4c78569102b82..f3d075baebb6232f70c8c25bd4f9b2922b47655e 100644 (file)
@@ -42,7 +42,7 @@
 #include <media/si4713.h>
 #include <linux/leds-lp5523.h>
 
-#include <../drivers/staging/iio/light/tsl2563.h>
+#include <linux/platform_data/tsl2563.h>
 #include <linux/lis3lv02d.h>
 
 #if defined(CONFIG_IR_RX51) || defined(CONFIG_IR_RX51_MODULE)
index dbf80abc834fd3f848a7945b9ddbf38da5a968d7..5ef1a396e0c9ba98f128f38277be9668af1ad80a 100644 (file)
@@ -32,6 +32,16 @@ config SENSORS_LM3533
          changes. The ALS-control output values can be set per zone for the
          three current output channels.
 
+config SENSORS_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 tsl2563.
+
 config VCNL4000
        tristate "VCNL4000 combined ALS and proximity sensor"
        depends on I2C
index 21a8f0df140791d18e8b7765ae0a682b101f3be3..040d9c75f8e6277e964803676412240b328f51b6 100644 (file)
@@ -4,5 +4,6 @@
 
 obj-$(CONFIG_ADJD_S311)                += adjd_s311.o
 obj-$(CONFIG_SENSORS_LM3533)   += lm3533-als.o
+obj-$(CONFIG_SENSORS_TSL2563)  += tsl2563.o
 obj-$(CONFIG_VCNL4000)         += vcnl4000.o
 obj-$(CONFIG_HID_SENSOR_ALS)   += hid-sensor-als.o
diff --git a/drivers/iio/light/tsl2563.c b/drivers/iio/light/tsl2563.c
new file mode 100644 (file)
index 0000000..fd8be69
--- /dev/null
@@ -0,0 +1,887 @@
+/*
+ * drivers/iio/light/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/interrupt.h>
+#include <linux/irq.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/events.h>
+#include <linux/platform_data/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 */
+       bool suspended;
+
+       struct tsl2563_gainlevel_coeff const *gainlevel;
+
+       u16                     low_thres;
+       u16                     high_thres;
+       u8                      intr;
+       bool                    int_enabled;
+
+       /* 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)
+{
+       struct i2c_client *client = chip->client;
+       u8 cmd;
+
+       cmd = on ? TSL2563_CMD_POWER_ON : TSL2563_CMD_POWER_OFF;
+       return i2c_smbus_write_byte_data(client,
+                                        TSL2563_CMD | TSL2563_REG_CTRL, cmd);
+}
+
+/*
+ * 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)
+{
+       struct i2c_client *client = chip->client;
+       int ret;
+
+       ret = i2c_smbus_read_byte_data(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)
+{
+       int ret;
+
+       ret = i2c_smbus_write_byte_data(chip->client,
+                       TSL2563_CMD | TSL2563_REG_TIMING,
+                       chip->gainlevel->gaintime);
+       if (ret)
+               goto error_ret;
+       ret = i2c_smbus_write_byte_data(chip->client,
+                       TSL2563_CMD | TSL2563_REG_HIGHLOW,
+                       chip->high_thres & 0xFF);
+       if (ret)
+               goto error_ret;
+       ret = i2c_smbus_write_byte_data(chip->client,
+                       TSL2563_CMD | TSL2563_REG_HIGHHIGH,
+                       (chip->high_thres >> 8) & 0xFF);
+       if (ret)
+               goto error_ret;
+       ret = i2c_smbus_write_byte_data(chip->client,
+                       TSL2563_CMD | TSL2563_REG_LOWLOW,
+                       chip->low_thres & 0xFF);
+       if (ret)
+               goto error_ret;
+       ret = i2c_smbus_write_byte_data(chip->client,
+                       TSL2563_CMD | TSL2563_REG_LOWHIGH,
+                       (chip->low_thres >> 8) & 0xFF);
+/*
+ * Interrupt register is automatically written anyway if it is relevant
+ * so is not here.
+ */
+error_ret:
+       return ret;
+}
+
+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;
+}
+
+static int tsl2563_read_id(struct tsl2563_chip *chip, u8 *id)
+{
+       struct i2c_client *client = chip->client;
+       int ret;
+
+       ret = i2c_smbus_read_byte_data(client, TSL2563_CMD | TSL2563_REG_ID);
+       if (ret < 0)
+               return ret;
+
+       *id = ret;
+
+       return 0;
+}
+
+/*
+ * "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->suspended)
+               goto out;
+
+       if (!chip->int_enabled) {
+               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);
+
+       if (!chip->int_enabled)
+               schedule_delayed_work(&chip->poweroff_work, 5 * HZ);
+
+       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 == IIO_MOD_LIGHT_BOTH)
+               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 IIO_CHAN_INFO_RAW:
+       case IIO_CHAN_INFO_PROCESSED:
+               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:
+               ret = -EINVAL;
+               goto error_ret;
+       }
+
+error_ret:
+       mutex_unlock(&chip->lock);
+       return ret;
+}
+
+static const struct iio_chan_spec tsl2563_channels[] = {
+       {
+               .type = IIO_LIGHT,
+               .indexed = 1,
+               .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT,
+               .channel = 0,
+       }, {
+               .type = IIO_INTENSITY,
+               .modified = 1,
+               .channel2 = IIO_MOD_LIGHT_BOTH,
+               .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
+               IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
+               .event_mask = (IIO_EV_BIT(IIO_EV_TYPE_THRESH,
+                                         IIO_EV_DIR_RISING) |
+                              IIO_EV_BIT(IIO_EV_TYPE_THRESH,
+                                         IIO_EV_DIR_FALLING)),
+       }, {
+               .type = IIO_INTENSITY,
+               .modified = 1,
+               .channel2 = IIO_MOD_LIGHT_IR,
+               .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
+               IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
+       }
+};
+
+static int tsl2563_read_thresh(struct iio_dev *indio_dev,
+                              u64 event_code,
+                              int *val)
+{
+       struct tsl2563_chip *chip = iio_priv(indio_dev);
+
+       switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
+       case IIO_EV_DIR_RISING:
+               *val = chip->high_thres;
+               break;
+       case IIO_EV_DIR_FALLING:
+               *val = chip->low_thres;
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
+static int tsl2563_write_thresh(struct iio_dev *indio_dev,
+                                 u64 event_code,
+                                 int val)
+{
+       struct tsl2563_chip *chip = iio_priv(indio_dev);
+       int ret;
+       u8 address;
+
+       if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_RISING)
+               address = TSL2563_REG_HIGHLOW;
+       else
+               address = TSL2563_REG_LOWLOW;
+       mutex_lock(&chip->lock);
+       ret = i2c_smbus_write_byte_data(chip->client, TSL2563_CMD | address,
+                                       val & 0xFF);
+       if (ret)
+               goto error_ret;
+       ret = i2c_smbus_write_byte_data(chip->client,
+                                       TSL2563_CMD | (address + 1),
+                                       (val >> 8) & 0xFF);
+       if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_RISING)
+               chip->high_thres = val;
+       else
+               chip->low_thres = val;
+
+error_ret:
+       mutex_unlock(&chip->lock);
+
+       return ret;
+}
+
+static irqreturn_t tsl2563_event_handler(int irq, void *private)
+{
+       struct iio_dev *dev_info = private;
+       struct tsl2563_chip *chip = iio_priv(dev_info);
+
+       iio_push_event(dev_info,
+                      IIO_UNMOD_EVENT_CODE(IIO_LIGHT,
+                                           0,
+                                           IIO_EV_TYPE_THRESH,
+                                           IIO_EV_DIR_EITHER),
+                      iio_get_time_ns());
+
+       /* clear the interrupt and push the event */
+       i2c_smbus_write_byte(chip->client, TSL2563_CMD | TSL2563_CLEARINT);
+       return IRQ_HANDLED;
+}
+
+static int tsl2563_write_interrupt_config(struct iio_dev *indio_dev,
+                                         u64 event_code,
+                                         int state)
+{
+       struct tsl2563_chip *chip = iio_priv(indio_dev);
+       int ret = 0;
+
+       mutex_lock(&chip->lock);
+       if (state && !(chip->intr & 0x30)) {
+               chip->intr &= ~0x30;
+               chip->intr |= 0x10;
+               /* ensure the chip is actually on */
+               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;
+               }
+               ret = i2c_smbus_write_byte_data(chip->client,
+                                               TSL2563_CMD | TSL2563_REG_INT,
+                                               chip->intr);
+               chip->int_enabled = true;
+       }
+
+       if (!state && (chip->intr & 0x30)) {
+               chip->intr &= ~0x30;
+               ret = i2c_smbus_write_byte_data(chip->client,
+                                               TSL2563_CMD | TSL2563_REG_INT,
+                                               chip->intr);
+               chip->int_enabled = false;
+               /* now the interrupt is not enabled, we can go to sleep */
+               schedule_delayed_work(&chip->poweroff_work, 5 * HZ);
+       }
+out:
+       mutex_unlock(&chip->lock);
+
+       return ret;
+}
+
+static int tsl2563_read_interrupt_config(struct iio_dev *indio_dev,
+                                        u64 event_code)
+{
+       struct tsl2563_chip *chip = iio_priv(indio_dev);
+       int ret;
+
+       mutex_lock(&chip->lock);
+       ret = i2c_smbus_read_byte_data(chip->client,
+                                      TSL2563_CMD | TSL2563_REG_INT);
+       mutex_unlock(&chip->lock);
+       if (ret < 0)
+               return ret;
+
+       return !!(ret & 0x30);
+}
+
+static const struct iio_info tsl2563_info_no_irq = {
+       .driver_module = THIS_MODULE,
+       .read_raw = &tsl2563_read_raw,
+       .write_raw = &tsl2563_write_raw,
+};
+
+static const struct iio_info tsl2563_info = {
+       .driver_module = THIS_MODULE,
+       .read_raw = &tsl2563_read_raw,
+       .write_raw = &tsl2563_write_raw,
+       .read_event_value = &tsl2563_read_thresh,
+       .write_event_value = &tsl2563_write_thresh,
+       .read_event_config = &tsl2563_read_interrupt_config,
+       .write_event_config = &tsl2563_write_interrupt_config,
+};
+
+static int 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;
+       u8 id = 0;
+
+       indio_dev = iio_device_alloc(sizeof(*chip));
+       if (!indio_dev)
+               return -ENOMEM;
+
+       chip = iio_priv(indio_dev);
+
+       i2c_set_clientdata(client, chip);
+       chip->client = client;
+
+       err = tsl2563_detect(chip);
+       if (err) {
+               dev_err(&client->dev, "detect error %d\n", -err);
+               goto fail1;
+       }
+
+       err = tsl2563_read_id(chip, &id);
+       if (err) {
+               dev_err(&client->dev, "read id error %d\n", -err);
+               goto fail1;
+       }
+
+       mutex_init(&chip->lock);
+
+       /* Default values used until userspace says otherwise */
+       chip->low_thres = 0x0;
+       chip->high_thres = 0xffff;
+       chip->gainlevel = tsl2563_gainlevel_table;
+       chip->intr = TSL2563_INT_PERSIST(4);
+       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->modes = INDIO_DIRECT_MODE;
+
+       if (client->irq)
+               indio_dev->info = &tsl2563_info;
+       else
+               indio_dev->info = &tsl2563_info_no_irq;
+
+       if (client->irq) {
+               err = request_threaded_irq(client->irq,
+                                          NULL,
+                                          &tsl2563_event_handler,
+                                          IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+                                          "tsl2563_event",
+                                          indio_dev);
+               if (err) {
+                       dev_err(&client->dev, "irq request error %d\n", -err);
+                       goto fail1;
+               }
+       }
+
+       err = tsl2563_configure(chip);
+       if (err) {
+               dev_err(&client->dev, "configure error %d\n", -err);
+               goto fail2;
+       }
+
+       INIT_DELAYED_WORK(&chip->poweroff_work, tsl2563_poweroff_work);
+
+       /* The interrupt cannot yet be enabled so this is fine without lock */
+       schedule_delayed_work(&chip->poweroff_work, 5 * HZ);
+
+       err = iio_device_register(indio_dev);
+       if (err) {
+               dev_err(&client->dev, "iio registration error %d\n", -err);
+               goto fail3;
+       }
+
+       return 0;
+
+fail3:
+       cancel_delayed_work(&chip->poweroff_work);
+       flush_scheduled_work();
+fail2:
+       if (client->irq)
+               free_irq(client->irq, indio_dev);
+fail1:
+       iio_device_free(indio_dev);
+       return err;
+}
+
+static int tsl2563_remove(struct i2c_client *client)
+{
+       struct tsl2563_chip *chip = i2c_get_clientdata(client);
+       struct iio_dev *indio_dev = iio_priv_to_dev(chip);
+
+       iio_device_unregister(indio_dev);
+       if (!chip->int_enabled)
+               cancel_delayed_work(&chip->poweroff_work);
+       /* Ensure that interrupts are disabled - then flush any bottom halves */
+       chip->intr &= ~0x30;
+       i2c_smbus_write_byte_data(chip->client, TSL2563_CMD | TSL2563_REG_INT,
+                                 chip->intr);
+       flush_scheduled_work();
+       tsl2563_set_power(chip, 0);
+       if (client->irq)
+               free_irq(client->irq, indio_dev);
+
+       iio_device_free(indio_dev);
+
+       return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tsl2563_suspend(struct device *dev)
+{
+       struct tsl2563_chip *chip = i2c_get_clientdata(to_i2c_client(dev));
+       int ret;
+
+       mutex_lock(&chip->lock);
+
+       ret = tsl2563_set_power(chip, 0);
+       if (ret)
+               goto out;
+
+       chip->suspended = true;
+
+out:
+       mutex_unlock(&chip->lock);
+       return ret;
+}
+
+static int tsl2563_resume(struct device *dev)
+{
+       struct tsl2563_chip *chip = i2c_get_clientdata(to_i2c_client(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->suspended = false;
+
+out:
+       mutex_unlock(&chip->lock);
+       return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(tsl2563_pm_ops, tsl2563_suspend, tsl2563_resume);
+#define TSL2563_PM_OPS (&tsl2563_pm_ops)
+#else
+#define TSL2563_PM_OPS NULL
+#endif
+
+static const struct i2c_device_id tsl2563_id[] = {
+       { "tsl2560", 0 },
+       { "tsl2561", 1 },
+       { "tsl2562", 2 },
+       { "tsl2563", 3 },
+       {}
+};
+MODULE_DEVICE_TABLE(i2c, tsl2563_id);
+
+static struct i2c_driver tsl2563_i2c_driver = {
+       .driver = {
+               .name    = "tsl2563",
+               .pm     = TSL2563_PM_OPS,
+       },
+       .probe          = tsl2563_probe,
+       .remove         = tsl2563_remove,
+       .id_table       = tsl2563_id,
+};
+module_i2c_driver(tsl2563_i2c_driver);
+
+MODULE_AUTHOR("Nokia Corporation");
+MODULE_DESCRIPTION("tsl2563 light sensor driver");
+MODULE_LICENSE("GPL");
index 4bed30eac3ed1e822c64679e44fda340b2878620..ca8d6e66c899dd1fb1858b7da52f07b09ed8506d 100644 (file)
@@ -25,16 +25,6 @@ config SENSORS_ISL29028
         Proximity value via iio. The ISL29028 provides the concurrent sensing
         of ambient light and proximity.
 
-config SENSORS_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 tsl2563.
-
 config TSL2583
        tristate "TAOS TSL2580, TSL2581 and TSL2583 light-to-digital converters"
        depends on I2C
index 141af1eb164c7b9249d928df57464b1f010ce7ca..9960fdf7c15b5b9746bd233c04971d43d22b5264 100644 (file)
@@ -2,7 +2,6 @@
 # Makefile for industrial I/O Light sensors
 #
 
-obj-$(CONFIG_SENSORS_TSL2563)  += tsl2563.o
 obj-$(CONFIG_SENSORS_ISL29018) += isl29018.o
 obj-$(CONFIG_SENSORS_ISL29028) += isl29028.o
 obj-$(CONFIG_TSL2583)  += tsl2583.o
diff --git a/drivers/staging/iio/light/tsl2563.c b/drivers/staging/iio/light/tsl2563.c
deleted file mode 100644 (file)
index b91d9bb..0000000
+++ /dev/null
@@ -1,887 +0,0 @@
-/*
- * 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/interrupt.h>
-#include <linux/irq.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/events.h>
-#include "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 */
-       bool suspended;
-
-       struct tsl2563_gainlevel_coeff const *gainlevel;
-
-       u16                     low_thres;
-       u16                     high_thres;
-       u8                      intr;
-       bool                    int_enabled;
-
-       /* 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)
-{
-       struct i2c_client *client = chip->client;
-       u8 cmd;
-
-       cmd = on ? TSL2563_CMD_POWER_ON : TSL2563_CMD_POWER_OFF;
-       return i2c_smbus_write_byte_data(client,
-                                        TSL2563_CMD | TSL2563_REG_CTRL, cmd);
-}
-
-/*
- * 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)
-{
-       struct i2c_client *client = chip->client;
-       int ret;
-
-       ret = i2c_smbus_read_byte_data(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)
-{
-       int ret;
-
-       ret = i2c_smbus_write_byte_data(chip->client,
-                       TSL2563_CMD | TSL2563_REG_TIMING,
-                       chip->gainlevel->gaintime);
-       if (ret)
-               goto error_ret;
-       ret = i2c_smbus_write_byte_data(chip->client,
-                       TSL2563_CMD | TSL2563_REG_HIGHLOW,
-                       chip->high_thres & 0xFF);
-       if (ret)
-               goto error_ret;
-       ret = i2c_smbus_write_byte_data(chip->client,
-                       TSL2563_CMD | TSL2563_REG_HIGHHIGH,
-                       (chip->high_thres >> 8) & 0xFF);
-       if (ret)
-               goto error_ret;
-       ret = i2c_smbus_write_byte_data(chip->client,
-                       TSL2563_CMD | TSL2563_REG_LOWLOW,
-                       chip->low_thres & 0xFF);
-       if (ret)
-               goto error_ret;
-       ret = i2c_smbus_write_byte_data(chip->client,
-                       TSL2563_CMD | TSL2563_REG_LOWHIGH,
-                       (chip->low_thres >> 8) & 0xFF);
-/*
- * Interrupt register is automatically written anyway if it is relevant
- * so is not here.
- */
-error_ret:
-       return ret;
-}
-
-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;
-}
-
-static int tsl2563_read_id(struct tsl2563_chip *chip, u8 *id)
-{
-       struct i2c_client *client = chip->client;
-       int ret;
-
-       ret = i2c_smbus_read_byte_data(client, TSL2563_CMD | TSL2563_REG_ID);
-       if (ret < 0)
-               return ret;
-
-       *id = ret;
-
-       return 0;
-}
-
-/*
- * "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->suspended)
-               goto out;
-
-       if (!chip->int_enabled) {
-               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);
-
-       if (!chip->int_enabled)
-               schedule_delayed_work(&chip->poweroff_work, 5 * HZ);
-
-       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 == IIO_MOD_LIGHT_BOTH)
-               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 IIO_CHAN_INFO_RAW:
-       case IIO_CHAN_INFO_PROCESSED:
-               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:
-               ret = -EINVAL;
-               goto error_ret;
-       }
-
-error_ret:
-       mutex_unlock(&chip->lock);
-       return ret;
-}
-
-static const struct iio_chan_spec tsl2563_channels[] = {
-       {
-               .type = IIO_LIGHT,
-               .indexed = 1,
-               .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT,
-               .channel = 0,
-       }, {
-               .type = IIO_INTENSITY,
-               .modified = 1,
-               .channel2 = IIO_MOD_LIGHT_BOTH,
-               .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
-               IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
-               .event_mask = (IIO_EV_BIT(IIO_EV_TYPE_THRESH,
-                                         IIO_EV_DIR_RISING) |
-                              IIO_EV_BIT(IIO_EV_TYPE_THRESH,
-                                         IIO_EV_DIR_FALLING)),
-       }, {
-               .type = IIO_INTENSITY,
-               .modified = 1,
-               .channel2 = IIO_MOD_LIGHT_IR,
-               .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
-               IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
-       }
-};
-
-static int tsl2563_read_thresh(struct iio_dev *indio_dev,
-                              u64 event_code,
-                              int *val)
-{
-       struct tsl2563_chip *chip = iio_priv(indio_dev);
-
-       switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
-       case IIO_EV_DIR_RISING:
-               *val = chip->high_thres;
-               break;
-       case IIO_EV_DIR_FALLING:
-               *val = chip->low_thres;
-               break;
-       default:
-               return -EINVAL;
-       }
-
-       return 0;
-}
-
-static int tsl2563_write_thresh(struct iio_dev *indio_dev,
-                                 u64 event_code,
-                                 int val)
-{
-       struct tsl2563_chip *chip = iio_priv(indio_dev);
-       int ret;
-       u8 address;
-
-       if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_RISING)
-               address = TSL2563_REG_HIGHLOW;
-       else
-               address = TSL2563_REG_LOWLOW;
-       mutex_lock(&chip->lock);
-       ret = i2c_smbus_write_byte_data(chip->client, TSL2563_CMD | address,
-                                       val & 0xFF);
-       if (ret)
-               goto error_ret;
-       ret = i2c_smbus_write_byte_data(chip->client,
-                                       TSL2563_CMD | (address + 1),
-                                       (val >> 8) & 0xFF);
-       if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_RISING)
-               chip->high_thres = val;
-       else
-               chip->low_thres = val;
-
-error_ret:
-       mutex_unlock(&chip->lock);
-
-       return ret;
-}
-
-static irqreturn_t tsl2563_event_handler(int irq, void *private)
-{
-       struct iio_dev *dev_info = private;
-       struct tsl2563_chip *chip = iio_priv(dev_info);
-
-       iio_push_event(dev_info,
-                      IIO_UNMOD_EVENT_CODE(IIO_LIGHT,
-                                           0,
-                                           IIO_EV_TYPE_THRESH,
-                                           IIO_EV_DIR_EITHER),
-                      iio_get_time_ns());
-
-       /* clear the interrupt and push the event */
-       i2c_smbus_write_byte(chip->client, TSL2563_CMD | TSL2563_CLEARINT);
-       return IRQ_HANDLED;
-}
-
-static int tsl2563_write_interrupt_config(struct iio_dev *indio_dev,
-                                         u64 event_code,
-                                         int state)
-{
-       struct tsl2563_chip *chip = iio_priv(indio_dev);
-       int ret = 0;
-
-       mutex_lock(&chip->lock);
-       if (state && !(chip->intr & 0x30)) {
-               chip->intr &= ~0x30;
-               chip->intr |= 0x10;
-               /* ensure the chip is actually on */
-               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;
-               }
-               ret = i2c_smbus_write_byte_data(chip->client,
-                                               TSL2563_CMD | TSL2563_REG_INT,
-                                               chip->intr);
-               chip->int_enabled = true;
-       }
-
-       if (!state && (chip->intr & 0x30)) {
-               chip->intr &= ~0x30;
-               ret = i2c_smbus_write_byte_data(chip->client,
-                                               TSL2563_CMD | TSL2563_REG_INT,
-                                               chip->intr);
-               chip->int_enabled = false;
-               /* now the interrupt is not enabled, we can go to sleep */
-               schedule_delayed_work(&chip->poweroff_work, 5 * HZ);
-       }
-out:
-       mutex_unlock(&chip->lock);
-
-       return ret;
-}
-
-static int tsl2563_read_interrupt_config(struct iio_dev *indio_dev,
-                                        u64 event_code)
-{
-       struct tsl2563_chip *chip = iio_priv(indio_dev);
-       int ret;
-
-       mutex_lock(&chip->lock);
-       ret = i2c_smbus_read_byte_data(chip->client,
-                                      TSL2563_CMD | TSL2563_REG_INT);
-       mutex_unlock(&chip->lock);
-       if (ret < 0)
-               return ret;
-
-       return !!(ret & 0x30);
-}
-
-static const struct iio_info tsl2563_info_no_irq = {
-       .driver_module = THIS_MODULE,
-       .read_raw = &tsl2563_read_raw,
-       .write_raw = &tsl2563_write_raw,
-};
-
-static const struct iio_info tsl2563_info = {
-       .driver_module = THIS_MODULE,
-       .read_raw = &tsl2563_read_raw,
-       .write_raw = &tsl2563_write_raw,
-       .read_event_value = &tsl2563_read_thresh,
-       .write_event_value = &tsl2563_write_thresh,
-       .read_event_config = &tsl2563_read_interrupt_config,
-       .write_event_config = &tsl2563_write_interrupt_config,
-};
-
-static int 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;
-       u8 id = 0;
-
-       indio_dev = iio_device_alloc(sizeof(*chip));
-       if (!indio_dev)
-               return -ENOMEM;
-
-       chip = iio_priv(indio_dev);
-
-       i2c_set_clientdata(client, chip);
-       chip->client = client;
-
-       err = tsl2563_detect(chip);
-       if (err) {
-               dev_err(&client->dev, "detect error %d\n", -err);
-               goto fail1;
-       }
-
-       err = tsl2563_read_id(chip, &id);
-       if (err) {
-               dev_err(&client->dev, "read id error %d\n", -err);
-               goto fail1;
-       }
-
-       mutex_init(&chip->lock);
-
-       /* Default values used until userspace says otherwise */
-       chip->low_thres = 0x0;
-       chip->high_thres = 0xffff;
-       chip->gainlevel = tsl2563_gainlevel_table;
-       chip->intr = TSL2563_INT_PERSIST(4);
-       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->modes = INDIO_DIRECT_MODE;
-
-       if (client->irq)
-               indio_dev->info = &tsl2563_info;
-       else
-               indio_dev->info = &tsl2563_info_no_irq;
-
-       if (client->irq) {
-               err = request_threaded_irq(client->irq,
-                                          NULL,
-                                          &tsl2563_event_handler,
-                                          IRQF_TRIGGER_RISING | IRQF_ONESHOT,
-                                          "tsl2563_event",
-                                          indio_dev);
-               if (err) {
-                       dev_err(&client->dev, "irq request error %d\n", -err);
-                       goto fail1;
-               }
-       }
-
-       err = tsl2563_configure(chip);
-       if (err) {
-               dev_err(&client->dev, "configure error %d\n", -err);
-               goto fail2;
-       }
-
-       INIT_DELAYED_WORK(&chip->poweroff_work, tsl2563_poweroff_work);
-
-       /* The interrupt cannot yet be enabled so this is fine without lock */
-       schedule_delayed_work(&chip->poweroff_work, 5 * HZ);
-
-       err = iio_device_register(indio_dev);
-       if (err) {
-               dev_err(&client->dev, "iio registration error %d\n", -err);
-               goto fail3;
-       }
-
-       return 0;
-
-fail3:
-       cancel_delayed_work(&chip->poweroff_work);
-       flush_scheduled_work();
-fail2:
-       if (client->irq)
-               free_irq(client->irq, indio_dev);
-fail1:
-       iio_device_free(indio_dev);
-       return err;
-}
-
-static int tsl2563_remove(struct i2c_client *client)
-{
-       struct tsl2563_chip *chip = i2c_get_clientdata(client);
-       struct iio_dev *indio_dev = iio_priv_to_dev(chip);
-
-       iio_device_unregister(indio_dev);
-       if (!chip->int_enabled)
-               cancel_delayed_work(&chip->poweroff_work);
-       /* Ensure that interrupts are disabled - then flush any bottom halves */
-       chip->intr &= ~0x30;
-       i2c_smbus_write_byte_data(chip->client, TSL2563_CMD | TSL2563_REG_INT,
-                                 chip->intr);
-       flush_scheduled_work();
-       tsl2563_set_power(chip, 0);
-       if (client->irq)
-               free_irq(client->irq, indio_dev);
-
-       iio_device_free(indio_dev);
-
-       return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int tsl2563_suspend(struct device *dev)
-{
-       struct tsl2563_chip *chip = i2c_get_clientdata(to_i2c_client(dev));
-       int ret;
-
-       mutex_lock(&chip->lock);
-
-       ret = tsl2563_set_power(chip, 0);
-       if (ret)
-               goto out;
-
-       chip->suspended = true;
-
-out:
-       mutex_unlock(&chip->lock);
-       return ret;
-}
-
-static int tsl2563_resume(struct device *dev)
-{
-       struct tsl2563_chip *chip = i2c_get_clientdata(to_i2c_client(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->suspended = false;
-
-out:
-       mutex_unlock(&chip->lock);
-       return ret;
-}
-
-static SIMPLE_DEV_PM_OPS(tsl2563_pm_ops, tsl2563_suspend, tsl2563_resume);
-#define TSL2563_PM_OPS (&tsl2563_pm_ops)
-#else
-#define TSL2563_PM_OPS NULL
-#endif
-
-static const struct i2c_device_id tsl2563_id[] = {
-       { "tsl2560", 0 },
-       { "tsl2561", 1 },
-       { "tsl2562", 2 },
-       { "tsl2563", 3 },
-       {}
-};
-MODULE_DEVICE_TABLE(i2c, tsl2563_id);
-
-static struct i2c_driver tsl2563_i2c_driver = {
-       .driver = {
-               .name    = "tsl2563",
-               .pm     = TSL2563_PM_OPS,
-       },
-       .probe          = tsl2563_probe,
-       .remove         = tsl2563_remove,
-       .id_table       = tsl2563_id,
-};
-module_i2c_driver(tsl2563_i2c_driver);
-
-MODULE_AUTHOR("Nokia Corporation");
-MODULE_DESCRIPTION("tsl2563 light sensor driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/staging/iio/light/tsl2563.h b/drivers/staging/iio/light/tsl2563.h
deleted file mode 100644 (file)
index b97368b..0000000
+++ /dev/null
@@ -1,9 +0,0 @@
-#ifndef __LINUX_TSL2563_H
-#define __LINUX_TSL2563_H
-
-struct tsl2563_platform_data {
-       int cover_comp_gain;
-};
-
-#endif /* __LINUX_TSL2563_H */
-
diff --git a/include/linux/platform_data/tsl2563.h b/include/linux/platform_data/tsl2563.h
new file mode 100644 (file)
index 0000000..c90d7a0
--- /dev/null
@@ -0,0 +1,8 @@
+#ifndef __LINUX_TSL2563_H
+#define __LINUX_TSL2563_H
+
+struct tsl2563_platform_data {
+       int cover_comp_gain;
+};
+
+#endif /* __LINUX_TSL2563_H */