[PATCH V3] TAOS tsl2x7x

Jon Brenner
2012-03-19T21:13:09Z

TAOS device driver (version 3) for the tsl/tmd 2771 and 2772 device families (inc. all variants).

Signed-off-by: Jon Brenner <jbrenner@taosinc.com>
---
.../light/sysfs-bus-iio-light-tsl2583 | 6 +
.../light/sysfs-bus-iio-light-tsl2x7x | 20 +
drivers/staging/iio/Documentation/sysfs-bus-iio | 7 +
.../staging/iio/Documentation/sysfs-bus-iio-light | 8 +-
drivers/staging/iio/light/Kconfig | 8 +
drivers/staging/iio/light/Makefile | 1 +
drivers/staging/iio/light/tsl2x7x_core.c | 1948 ++++++++++++++++++++
drivers/staging/iio/light/tsl2x7x_core.h | 75 +
8 files changed, 2069 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583 b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583
new file mode 100644
index 0000000..8f2a038
--- /dev/null
+++ b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583
@@ -0,0 +1,6 @@
+What: /sys/bus/iio/devices/device[n]/illuminance0_calibrate
+KernelVersion: 2.6.37
+Contact: linux-iio@vger.kernel.org
+Description:
+ This property causes an internal calibration of the als gain trim
+ value which is later used in calculating illuminance in lux.
diff --git a/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2x7x b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2x7x
new file mode 100644
index 0000000..cceadae
--- /dev/null
+++ b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2x7x
@@ -0,0 +1,20 @@
+What: /sys/bus/iio/devices/device[n]/illuminance0_calibrate
+KernelVersion: 2.6.37
+Contact: linux-iio@vger.kernel.org
+Description:
+ This property causes an internal calibration of the als gain trim
+ value which is later used in calculating illuminance in lux.
+
+What: /sys/bus/iio/devices/device[n]/illuminance0_both_raw
+KernelVersion: 3.3-rc1
+Contact: linux-iio@vger.kernel.org
+Description:
+ Simultainious ALS channel data.
+
+What: /sys/bus/iio/devices/device[n]/proximity_calibrate
+KernelVersion: 3.3-rc1
+Contact: linux-iio@vger.kernel.org
+Description:
+ Causes an recalculation and adjustment to the
+ proximity_thresh_rising_value.
+
diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio b/drivers/staging/iio/Documentation/sysfs-bus-iio
index 46a995d..5b2b5d3 100644
--- a/drivers/staging/iio/Documentation/sysfs-bus-iio
+++ b/drivers/staging/iio/Documentation/sysfs-bus-iio
@@ -258,6 +258,8 @@ What /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibscale
What /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibscale
What /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibscale
What /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibscale
+what /sys/bus/iio/devices/iio:deviceX/illuminance0_calibscale
+what /sys/bus/iio/devices/iio:deviceX/proximity_calibscale
KernelVersion: 2.6.35
Contact: linux-iio@vger.kernel.org
Description:
@@ -457,6 +459,10 @@ What: /sys/.../events/in_voltageY_raw_thresh_falling_value
What: /sys/.../events/in_voltageY_raw_thresh_falling_value
What: /sys/.../events/in_tempY_raw_thresh_falling_value
What: /sys/.../events/in_tempY_raw_thresh_falling_value
+What: /sys/.../events/illuminance0_thresh_falling_value
+what: /sys/.../events/illuminance0_thresh_rising_value
+what: /sys/.../events/proximity_thresh_falling_value
+what: /sys/.../events/proximity_thresh_rising_value
KernelVersion: 2.6.37
Contact: linux-iio@vger.kernel.org
Description:
@@ -739,3 +745,4 @@ Description:
system. To minimize the current consumption of the system,
the bridge can be disconnected (when it is not being used
using the bridge_switch_en attribute.
+
diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-light b/drivers/staging/iio/Documentation/sysfs-bus-iio-light
index edbf470..4385c70 100644
--- a/drivers/staging/iio/Documentation/sysfs-bus-iio-light
+++ b/drivers/staging/iio/Documentation/sysfs-bus-iio-light
@@ -76,10 +76,10 @@ Contact: linux-iio@vger.kernel.org
Description:
This property gets/sets the sensors ADC analog integration time.

-What: /sys/bus/iio/devices/device[n]/illuminance0_calibscale
+What: /sys/bus/iio/devices/device[n]/lux_table
KernelVersion: 2.6.37
Contact: linux-iio@vger.kernel.org
Description:
- Hardware or software applied calibration scale factor assumed
- to account for attenuation due to industrial design (glass
- filters or aperture holes).
+ This property gets/sets the table of coefficients
+ used in calculating illuminance in lux.
+
diff --git a/drivers/staging/iio/light/Kconfig b/drivers/staging/iio/light/Kconfig
index e7e9159..976f790 100644
--- a/drivers/staging/iio/light/Kconfig
+++ b/drivers/staging/iio/light/Kconfig
@@ -31,4 +31,12 @@ config TSL2583
Provides support for the TAOS tsl2580, tsl2581 and tsl2583 devices.
Access ALS data via iio, sysfs.

+config TSL2x7x
+ tristate "TAOS TSL/TMD2x71 and TSL/TMD2x72 Family of light and proximity sensors"
+ depends on I2C
+ help
+ Support for: tsl2571, tsl2671, tmd2671, tsl2771, tmd2771, tsl2572, tsl2672,
+ tmd2672, tsl2772, tmd2772 devices.
+ Provides iio_events and direct access via sysfs.
+
endmenu
diff --git a/drivers/staging/iio/light/Makefile b/drivers/staging/iio/light/Makefile
index 3011fbf..ff12c4b 100644
--- a/drivers/staging/iio/light/Makefile
+++ b/drivers/staging/iio/light/Makefile
@@ -5,3 +5,4 @@
obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o
obj-$(CONFIG_SENSORS_ISL29018) += isl29018.o
obj-$(CONFIG_TSL2583) += tsl2583.o
+obj-$(CONFIG_TSL2x7x) += tsl2x7x_core.o
diff --git a/drivers/staging/iio/light/tsl2x7x_core.c b/drivers/staging/iio/light/tsl2x7x_core.c
new file mode 100644
index 0000000..a2c3be6
--- /dev/null
+++ b/drivers/staging/iio/light/tsl2x7x_core.c
@@ -0,0 +1,1948 @@
+/*
+ * Device driver for monitoring ambient light intensity in (lux)
+ * and proximity detection (prox) within the TAOS TSL2X7X family of devices.
+ *
+ * Copyright (c) 2012, TAOS Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/i2c.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/mutex.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include "tsl2x7x_core.h"
+#include "../events.h"
+#include "../iio.h"
+#include "../sysfs.h"
+
+/* Cal defs*/
+#define PROX_STAT_CAL 0
+#define PROX_STAT_SAMP 1
+#define MAX_SAMPLES_CAL 200
+
+/* TSL2X7X Device ID */
+#define TRITON_ID 0x00
+#define SWORDFISH_ID 0x30
+#define HALIBUT_ID 0x20
+
+/* Lux calculation constants */
+#define TSL2X7X_LUX_CALC_OVER_FLOW 65535
+
+/* TAOS Register definitions - note:
+ * depending on device, some of these register are not used and the
+ * register address is benign.
+ */
+/* 2X7X register offsets */
+#define TSL2X7X_MAX_CONFIG_REG 16
+
+/* Device Registers and Masks */
+#define TSL2X7X_CNTRL 0x00
+#define TSL2X7X_ALS_TIME 0X01
+#define TSL2X7X_PRX_TIME 0x02
+#define TSL2X7X_WAIT_TIME 0x03
+#define TSL2X7X_ALS_MINTHRESHLO 0X04
+#define TSL2X7X_ALS_MINTHRESHHI 0X05
+#define TSL2X7X_ALS_MAXTHRESHLO 0X06
+#define TSL2X7X_ALS_MAXTHRESHHI 0X07
+#define TSL2X7X_PRX_MINTHRESHLO 0X08
+#define TSL2X7X_PRX_MINTHRESHHI 0X09
+#define TSL2X7X_PRX_MAXTHRESHLO 0X0A
+#define TSL2X7X_PRX_MAXTHRESHHI 0X0B
+#define TSL2X7X_PERSISTENCE 0x0C
+#define TSL2X7X_PRX_CONFIG 0x0D
+#define TSL2X7X_PRX_COUNT 0x0E
+#define TSL2X7X_GAIN 0x0F
+#define TSL2X7X_NOTUSED 0x10
+#define TSL2X7X_REVID 0x11
+#define TSL2X7X_CHIPID 0x12
+#define TSL2X7X_STATUS 0x13
+#define TSL2X7X_ALS_CHAN0LO 0x14
+#define TSL2X7X_ALS_CHAN0HI 0x15
+#define TSL2X7X_ALS_CHAN1LO 0x16
+#define TSL2X7X_ALS_CHAN1HI 0x17
+#define TSL2X7X_PRX_LO 0x18
+#define TSL2X7X_PRX_HI 0x19
+
+/* tsl2X7X cmd reg masks */
+#define TSL2X7X_CMD_REG 0x80
+#define TSL2X7X_CMD_SPL_FN 0x60
+
+#define TSL2X7X_CMD_PROX_INT_CLR 0X05
+#define TSL2X7X_CMD_ALS_INT_CLR 0x06
+#define TSL2X7X_CMD_PROXALS_INT_CLR 0X07
+
+/* tsl2X7X cntrl reg masks */
+#define TSL2X7X_CNTL_ADC_ENBL 0x02
+#define TSL2X7X_CNTL_PWR_ON 0x01
+
+/* tsl2X7X status reg masks */
+#define TSL2X7X_STA_ADC_VALID 0x01
+#define TSL2X7X_STA_PRX_VALID 0x02
+#define TSL2X7X_STA_ADC_PRX_VALID 0x03
+#define TSL2X7X_STA_ALS_INTR 0x10
+#define TSL2X7X_STA_ADC_INTR 0x10
+#define TSL2X7X_STA_PRX_INTR 0x20
+
+#define TSL2X7X_STA_ADC_INTR 0x10
+
+/* tsl2X7X cntrl reg masks */
+#define TSL2X7X_CNTL_REG_CLEAR 0x00
+#define TSL2X7X_CNTL_PROX_INT_ENBL 0X20
+#define TSL2X7X_CNTL_ALS_INT_ENBL 0X10
+#define TSL2X7X_CNTL_WAIT_TMR_ENBL 0X08
+#define TSL2X7X_CNTL_PROX_DET_ENBL 0X04
+#define TSL2X7X_CNTL_PWRON 0x01
+#define TSL2X7X_CNTL_ALSPON_ENBL 0x03
+#define TSL2X7X_CNTL_INTALSPON_ENBL 0x13
+#define TSL2X7X_CNTL_PROXPON_ENBL 0x0F
+#define TSL2X7X_CNTL_INTPROXPON_ENBL 0x2F
+
+/*Prox diode to use */
+#define TSL2X7X_DIODE0 0x10
+#define TSL2X7X_DIODE1 0x20
+#define TSL2X7X_DIODE_BOTH 0x30
+
+/* LED Power */
+#define TSL2X7X_mA100 0x00
+#define TSL2X7X_mA50 0x40
+#define TSL2X7X_mA25 0x80
+#define TSL2X7X_mA13 0xD0
+
+/*Common device IIO EventMask */
+#define TSL2X7X_EVENT_MASK \
+ (IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING) | \
+ IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING)),
+
+/* TAOS txx2x7x Device family members */
+enum {
+ tsl2571,
+ tsl2671,
+ tmd2671,
+ tsl2771,
+ tmd2771,
+ tsl2572,
+ tsl2672,
+ tmd2672,
+ tsl2772,
+ tmd2772
+};
+
+enum {
+ TSL2X7X_CHIP_UNKNOWN = 0,
+ TSL2X7X_CHIP_WORKING = 1,
+ TSL2X7X_CHIP_SUSPENDED = 2
+};
+
+/* Per-device data */
+struct tsl2x7x_als_info {
+ u16 als_ch0;
+ u16 als_ch1;
+ u16 lux;
+};
+
+/* proximity data */
+struct tsl2x7x_prox_info {
+ u16 prox_data;
+ int prox_event;
+};
+
+struct prox_stat {
+ u16 min;
+ u16 max;
+ u16 mean;
+ unsigned long stddev;
+};
+
+struct tsl2x7x_chip_info {
+ int num_channels;
+ struct iio_chan_spec channel[9];
+ const struct iio_info *info;
+};
+
+struct tsl2X7X_chip {
+ kernel_ulong_t id;
+ struct mutex prox_mutex;
+ struct mutex als_mutex;
+ struct i2c_client *client;
+ struct tsl2x7x_prox_info prox_cur_info;
+ struct tsl2x7x_als_info als_cur_info;
+ struct tsl2x7x_settings tsl2x7x_settings;
+ struct tsl2X7X_platform_data *pdata;
+ int als_time_scale;
+ int als_saturation;
+ int tsl2x7x_chip_status;
+ u8 tsl2x7x_config[TSL2X7X_MAX_CONFIG_REG];
+ bool init_done;
+ const struct tsl2x7x_chip_info *chip_info;
+ const struct iio_info *info;
+ s64 event_timestamp;
+ /* This structure is intentionally large to accommodate
+ * updates via sysfs. */
+ /* Sized to 9 = max 8 segments + 1 termination segment */
+ struct tsl2x7x_lux tsl2x7x_device_lux[TSL2X7X_MAX_LUX_TABLE_SIZE];
+};
+
+/* Different devices require different coefficents */
+static const struct tsl2x7x_lux tsl2x71_lux_table[] = {
+ { 14461, 611, 1211 },
+ { 18540, 352, 623 },
+ { 0, 0, 0 },
+};
+
+static const struct tsl2x7x_lux tmd2x71_lux_table[] = {
+ { 11635, 115, 256 },
+ { 15536, 87, 179 },
+ { 0, 0, 0 },
+};
+
+static const struct tsl2x7x_lux tsl2x72_lux_table[] = {
+ { 14013, 466, 917 },
+ { 18222, 310, 552 },
+ { 0, 0, 0 },
+};
+
+static const struct tsl2x7x_lux tmd2x72_lux_table[] = {
+ { 13218, 130, 262 },
+ { 17592, 92, 169 },
+ { 0, 0, 0 },
+};
+
+static const struct tsl2x7x_lux *tsl2x7x_default_lux_table_group[] = {
+ [tsl2571] = tsl2x71_lux_table,
+ [tsl2671] = tsl2x71_lux_table,
+ [tmd2671] = tmd2x71_lux_table,
+ [tsl2771] = tsl2x71_lux_table,
+ [tmd2771] = tmd2x71_lux_table,
+ [tsl2572] = tsl2x72_lux_table,
+ [tsl2672] = tsl2x72_lux_table,
+ [tmd2672] = tmd2x72_lux_table,
+ [tsl2772] = tsl2x72_lux_table,
+ [tmd2772] = tmd2x72_lux_table,
+};
+
+static const struct tsl2x7x_settings tsl2x7x_default_settings = {
+ .als_time = 200,
+ /* must be a multiple of 50mS */
+ .als_gain = 0,
+ /* this is actually an index into the gain table */
+ .prx_time = 0xfe, /*5.4 mS */
+ /* 2.7ms prox integration time - decrease to increase time */
+ /* decreases in 2.7 ms intervals */
+ .prox_gain = 1,
+ /* these are bits 3:2 of reg 0x0f: 0=x1,1=x2,2=x4,3=x8 */
+ /* assume clear glass as default */
+ .wait_time = 245,
+ /* Time between PRX and ALS cycles -decrease to increase time */
+ /* decreases in 2.7 ms intervals */
+ .prox_config = 0,
+ /* Prox configuration filters */
+ .als_gain_trim = 1000,
+ /* default gain trim to account for aperture effects */
+ .als_cal_target = 150,
+ /* Known external ALS reading used for calibration */
+ .als_thresh_low = 200,
+ /* CH0 'low' count to trigger interrupt */
+ .als_thresh_high = 256,
+ /* CH0 'high' count to trigger interrupt */
+ .als_persistence = 0xFF,
+ /* Number of 'out of limits' ADC readings PRX/ALS*/
+ .interrupts_en = 0x00,
+ /* Default interrupt(s) enabled.
+ * 0x00 = none, 0x10 = als, 0x20 = prx 0x30 = bth */
+ .prox_thres_low = 0,
+ .prox_thres_high = 512,
+ /*default threshold adjust either manually or with cal routine*/
+ .prox_max_samples_cal = 30,
+ .prox_pulse_count = 8
+};
+
+static const s16 tsl2X7X_als_gainadj[] = {
+ 1,
+ 8,
+ 16,
+ 120
+};
+
+static const s16 tsl2X7X_prx_gainadj[] = {
+ 1,
+ 2,
+ 4,
+ 8
+};
+
+/* Channel variations */
+enum {
+ ALS,
+ PRX,
+ ALSPRX,
+ PRX2,
+ ALSPRX2,
+};
+
+const u8 device_channel_config[] = {
+ ALS,
+ PRX,
+ PRX,
+ ALSPRX,
+ ALSPRX,
+ ALS,
+ PRX2,
+ PRX2,
+ ALSPRX2,
+ ALSPRX2
+};
+
+/*
+ * Read a number of bytes starting at register (reg) location.
+ * Return 0, or i2c_smbus_write_byte ERROR code.
+ */
+static int
+tsl2x7x_i2c_read(struct i2c_client *client, u8 reg, u8 *val)
+{
+ int ret;
+
+ /* select register to write */
+ ret = i2c_smbus_write_byte(client, (TSL2X7X_CMD_REG | reg));
+ if (ret < 0) {
+ dev_err(&client->dev, "tsl2x7x_i2c_read failed to write"
+ " register %x\n", reg);
+ return ret;
+ }
+ /* read the data */
+ *val = i2c_smbus_read_byte(client);
+
+ return 0;
+}
+
+/*
+ * 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 tsl2x7x_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 tsl2x7x_get_lux(struct iio_dev *indio_dev)
+{
+ u16 ch0, ch1; /* separated ch0/ch1 data from device */
+ u32 lux; /* raw lux calculated from device data */
+ u64 lux64;
+ u32 ratio;
+ u8 buf[4];
+ struct tsl2x7x_lux *p;
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+ int i, ret;
+ u32 ch0lux = 0;
+ u32 ch1lux = 0;
+
+ if (mutex_trylock(&chip->als_mutex) == 0) {
+ dev_info(&chip->client->dev, "tsl2x7x_get_lux device is busy\n");
+ return chip->als_cur_info.lux; /* busy, so return LAST VALUE */
+ }
+
+ if (chip->tsl2x7x_chip_status != TSL2X7X_CHIP_WORKING) {
+ /* device is not enabled */
+ dev_err(&chip->client->dev, "tsl2x7x_get_lux device is not enabled\n");
+ ret = -EBUSY ;
+ goto out_unlock;
+ }
+
+ ret = tsl2x7x_i2c_read(chip->client,
+ (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &buf[0]);
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "tsl2x7x_get_lux failed to read CMD_REG\n");
+ goto out_unlock;
+ }
+ /* is data new & valid */
+ if (!(buf[0] & TSL2X7X_STA_ADC_VALID)) {
+ dev_err(&chip->client->dev,
+ "tsl2x7x_get_lux data not valid yet\n");
+ ret = chip->als_cur_info.lux; /* return LAST VALUE */
+ goto out_unlock;
+ }
+
+ for (i = 0; i < 4; i++) {
+ ret = tsl2x7x_i2c_read(chip->client,
+ (TSL2X7X_CMD_REG | (TSL2X7X_ALS_CHAN0LO + i)),
+ &buf[i]);
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "tsl2x7x_get_lux failed to read"
+ " ret: %x\n", ret);
+ goto out_unlock;
+ }
+ }
+
+ /* clear status, really interrupt status ( are off),
+ but we use the bit anyway */
+ ret = i2c_smbus_write_byte(chip->client,
+ (TSL2X7X_CMD_REG |
+ TSL2X7X_CMD_SPL_FN |
+ TSL2X7X_CMD_ALS_INT_CLR));
+
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "tsl2x7x_i2c_write_command failed in tsl2x7x_get_lux, err = %d\n",
+ ret);
+ goto out_unlock; /* have no data, so return failure */
+ }
+
+ /* extract ALS/lux data */
+ ch0 = le16_to_cpup((const __le16 *)&buf[0]);
+ ch1 = le16_to_cpup((const __le16 *)&buf[2]);
+
+ chip->als_cur_info.als_ch0 = ch0;
+ chip->als_cur_info.als_ch1 = ch1;
+
+ if ((ch0 >= chip->als_saturation) || (ch1 >= chip->als_saturation)) {
+ lux = TSL2X7X_LUX_CALC_OVER_FLOW;
+ goto return_max;
+ }
+
+ if (ch0 == 0) {
+ /* have no data, so return LAST VALUE */
+ ret = chip->als_cur_info.lux = 0;
+ goto out_unlock;
+ }
+ /* calculate ratio */
+ ratio = (ch1 << 15) / ch0;
+ /* convert to unscaled lux using the pointer to the table */
+ p = (struct tsl2x7x_lux *) chip->tsl2x7x_device_lux;
+ while (p->ratio != 0 && p->ratio < ratio)
+ p++;
+
+ if (p->ratio == 0) {
+ lux = 0;
+ } else {
+ ch0lux = ((ch0 * p->ch0) +
+ (tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain] >> 1))
+ / tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain];
+
+ ch1lux = ((ch1 * p->ch1) +
+ (tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain] >> 1))
+ / tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain];
+
+ lux = ch0lux - ch1lux;
+ }
+
+ /* note: lux is 31 bit max at this point */
+ if (ch1lux > ch0lux) {
+ dev_dbg(&chip->client->dev, "No Data - Return last value\n");
+ ret = chip->als_cur_info.lux = 0;
+ goto out_unlock;
+ }
+
+ /* adjust for active time scale */
+ if (chip->als_time_scale == 0)
+ lux = 0;
+ else
+ lux = (lux + (chip->als_time_scale >> 1)) /
+ chip->als_time_scale;
+
+ /* adjust for active gain scale
+ * The tsl2x7x_device_lux tables have a factor of 256 built-in.
+ * User-specified gain provides a multiplier.
+ * Apply user-specified gain before shifting right to retain precision.
+ * Use 64 bits to avoid overflow on multiplication.
+ * Then go back to 32 bits before division to avoid using div_u64().
+ */
+ lux64 = lux;
+ lux64 = lux64 * chip->tsl2x7x_settings.als_gain_trim;
+ lux64 >>= 8;
+ lux = lux64;
+ lux = (lux + 500) / 1000;
+
+ if (lux > TSL2X7X_LUX_CALC_OVER_FLOW) /* check for overflow */
+ lux = TSL2X7X_LUX_CALC_OVER_FLOW;
+
+ /* Update the structure with the latest lux. */
+return_max:
+ chip->als_cur_info.lux = lux;
+ ret = lux;
+
+out_unlock:
+ mutex_unlock(&chip->als_mutex);
+
+ return ret;
+}
+
+/*
+ * Proximity poll function - if valid data is available, read and form the ch0
+ * and prox data values, check for limits on the ch0 value, and check the prox
+ * data against the current thresholds, to set the event status accordingly.
+ */
+static int tsl2x7x_prox_poll(struct iio_dev *indio_dev)
+{
+#define CONSECUTIVE_RETRIES 50
+
+ int i;
+ int ret;
+ u8 status;
+ u8 chdata[2];
+ int err_cnt;
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+
+ if (mutex_trylock(&chip->prox_mutex) == 0) {
+ dev_err(&chip->client->dev, "Can't get prox mutex\n");
+ return -EBUSY;
+ }
+
+ err_cnt = 0;
+
+try_again:
+
+ ret = tsl2x7x_i2c_read(chip->client,
+ (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &status);
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "prox_poll: i2c err\n");
+ goto prox_poll_err;
+ }
+
+ if (chip->id < tsl2572) {
+ if (!(status & TSL2X7X_STA_ADC_VALID)) {
+ err_cnt++;
+ if (err_cnt > CONSECUTIVE_RETRIES) {
+ dev_err(&chip->client->dev,
+ "Consec. retries exceeded\n");
+ goto prox_poll_err;
+ }
+ goto try_again;
+ }
+ } else {
+ if (!(status & TSL2X7X_STA_PRX_VALID)) {
+ err_cnt++;
+ if (err_cnt > CONSECUTIVE_RETRIES) {
+ dev_err(&chip->client->dev,
+ "Consec. retries exceeded\n");
+ goto prox_poll_err;
+ }
+ goto try_again;
+ }
+ }
+
+ for (i = 0; i < 2; i++) {
+ ret = tsl2x7x_i2c_read(chip->client,
+ (TSL2X7X_CMD_REG |
+ (TSL2X7X_PRX_LO + i)), &chdata[i]);
+ if (ret < 0)
+ goto prox_poll_err;
+ }
+
+ chip->prox_cur_info.prox_data = (chdata[1]<<8)|chdata[0];
+ if (chip->prox_cur_info.prox_data == 0)
+ goto try_again;
+
+ if (chip->prox_cur_info.prox_data >=
+ chip->tsl2x7x_settings.prox_thres_high)
+ chip->prox_cur_info.prox_event = 1;
+ else
+ chip->prox_cur_info.prox_event = 0;
+
+ mutex_unlock(&chip->prox_mutex);
+ return chip->prox_cur_info.prox_event;
+
+prox_poll_err:
+ mutex_unlock(&chip->prox_mutex);
+
+ return ret;
+}
+
+/*
+ * Provides initial operational parameter defaults.
+ * These defaults may be changed through the device's sysfs files.
+ */
+static void tsl2x7x_defaults(struct tsl2X7X_chip *chip)
+{
+ /* If Operational settings defined elsewhere.. */
+ if (chip->pdata && chip->pdata->platform_default_settings != 0)
+ memcpy(&(chip->tsl2x7x_settings),
+ chip->pdata->platform_default_settings,
+ sizeof(tsl2x7x_default_settings));
+ else
+ memcpy(&(chip->tsl2x7x_settings),
+ &tsl2x7x_default_settings,
+ sizeof(tsl2x7x_default_settings));
+
+ /* Load up the proper lux table. */
+ if (chip->pdata && chip->pdata->platform_lux_table[0].ratio != 0)
+ memcpy(chip->tsl2x7x_device_lux,
+ chip->pdata->platform_lux_table,
+ sizeof(chip->pdata->platform_lux_table));
+ else
+ memcpy(chip->tsl2x7x_device_lux,
+ (struct tsl2x7x_lux *)tsl2x7x_default_lux_table_group[chip->id],
+ MAX_DEFAULT_TABLE_BYTES);
+
+}
+
+/*
+ * Obtain single reading and calculate the als_gain_trim
+ * (later used to derive actual lux).
+ * Return updated gain_trim value.
+ */
+static int tsl2x7x_als_calibrate(struct iio_dev *indio_dev)
+{
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+ u8 reg_val;
+ int gain_trim_val;
+ int ret;
+ int lux_val;
+
+ ret = i2c_smbus_write_byte(chip->client,
+ (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "tsl2x7x_als_calibrate failed to write CNTRL register, ret=%d\n",
+ ret);
+ return ret;
+ }
+
+ reg_val = i2c_smbus_read_byte(chip->client);
+ if ((reg_val & (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON))
+ != (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON)) {
+ dev_err(&chip->client->dev,
+ "tsl2x7x_als_calibrate failed: ADC not enabled\n");
+ return -1;
+ }
+
+ ret = i2c_smbus_write_byte(chip->client,
+ (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "tsl2x7x_als_calibrate failed to write ctrl reg: ret=%d\n",
+ ret);
+ return ret;
+ }
+
+ reg_val = i2c_smbus_read_byte(chip->client);
+ if ((reg_val & TSL2X7X_STA_ADC_VALID) != TSL2X7X_STA_ADC_VALID) {
+ dev_err(&chip->client->dev,
+ "tsl2x7x_als_calibrate failed: STATUS - ADC not valid.\n");
+ return -ENODATA;
+ }
+
+ lux_val = tsl2x7x_get_lux(indio_dev);
+ if (lux_val < 0) {
+ dev_err(&chip->client->dev,
+ "tsl2x7x_als_calibrate failed to get lux\n");
+ return lux_val;
+ }
+
+ gain_trim_val = (((chip->tsl2x7x_settings.als_cal_target)
+ * chip->tsl2x7x_settings.als_gain_trim) / lux_val);
+ if ((gain_trim_val < 250) || (gain_trim_val > 4000))
+ return -ERANGE;
+
+ chip->tsl2x7x_settings.als_gain_trim = gain_trim_val;
+ dev_info(&chip->client->dev,
+ "%s als_calibrate completed\n", chip->client->name);
+
+ return (int) gain_trim_val;
+}
+
+/*
+ * Turn the device on.
+ * Configuration must be set before calling this function.
+ */
+static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
+{
+ int i;
+ int ret = 0;
+ u8 *dev_reg;
+ u8 utmp;
+ int als_count;
+ int als_time;
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+ u8 reg_val = 0;
+
+ if (chip->pdata && chip->pdata->power_on)
+ chip->pdata->power_on(indio_dev);
+
+ /* Non calculated parameters */
+ chip->tsl2x7x_config[TSL2X7X_PRX_TIME] =
+ chip->tsl2x7x_settings.prx_time;
+ chip->tsl2x7x_config[TSL2X7X_WAIT_TIME] =
+ chip->tsl2x7x_settings.wait_time;
+ chip->tsl2x7x_config[TSL2X7X_PRX_CONFIG] =
+ chip->tsl2x7x_settings.prox_config;
+
+ chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHLO] =
+ (chip->tsl2x7x_settings.als_thresh_low) & 0xFF;
+ chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHHI] =
+ (chip->tsl2x7x_settings.als_thresh_low >> 8) & 0xFF;
+ chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHLO] =
+ (chip->tsl2x7x_settings.als_thresh_high) & 0xFF;
+ chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHHI] =
+ (chip->tsl2x7x_settings.als_thresh_high >> 8) & 0xFF;
+ chip->tsl2x7x_config[TSL2X7X_PERSISTENCE] =
+ chip->tsl2x7x_settings.als_persistence;
+
+ chip->tsl2x7x_config[TSL2X7X_PRX_COUNT] =
+ chip->tsl2x7x_settings.prox_pulse_count;
+ chip->tsl2x7x_config[TSL2X7X_PRX_MINTHRESHLO] =
+ chip->tsl2x7x_settings.prox_thres_low;
+ chip->tsl2x7x_config[TSL2X7X_PRX_MAXTHRESHLO] =
+ chip->tsl2x7x_settings.prox_thres_high;
+
+ /* and make sure we're not already on */
+ if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
+ /* if forcing a register update - turn off, then on */
+ dev_info(&chip->client->dev, "device is already enabled\n");
+ return -EINVAL;
+ }
+
+ /* determine als integration regster */
+ als_count = (chip->tsl2x7x_settings.als_time * 100 + 135) / 270;
+ if (als_count == 0)
+ als_count = 1; /* ensure at least one cycle */
+
+ /* convert back to time (encompasses overrides) */
+ als_time = (als_count * 27 + 5) / 10;
+ chip->tsl2x7x_config[TSL2X7X_ALS_TIME] = 256 - als_count;
+
+ /* Set the gain based on tsl2x7x_settings struct */
+ chip->tsl2x7x_config[TSL2X7X_GAIN] =
+ (chip->tsl2x7x_settings.als_gain |
+ (TSL2X7X_mA100 | TSL2X7X_DIODE1)
+ | ((chip->tsl2x7x_settings.prox_gain) << 2));
+
+ /* set chip struct re scaling and saturation */
+ chip->als_saturation = als_count * 922; /* 90% of full scale */
+ chip->als_time_scale = (als_time + 25) / 50;
+
+ /* TSL2X7X Specific power-on / adc enable sequence
+ * Power on the device 1st. */
+ utmp = TSL2X7X_CNTL_PWR_ON;
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
+ if (ret < 0) {
+ dev_err(&chip->client->dev, "tsl2x7x_chip_on failed on CNTRL reg.\n");
+ return -1;
+ }
+
+ /* Use the following shadow copy for our delay before enabling ADC.
+ * Write all the registers. */
+ for (i = 0, dev_reg = chip->tsl2x7x_config;
+ i < TSL2X7X_MAX_CONFIG_REG; i++) {
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2X7X_CMD_REG + i, *dev_reg++);
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "tsl2x7x_chip_on failed on write to reg %d.\n", i);
+ return ret;
+ }
+ }
+
+ udelay(3000); /* Power-on settling time */
+
+ /* NOW enable the ADC
+ * initialize the desired mode of operation */
+ utmp = TSL2X7X_CNTL_PWR_ON |
+ TSL2X7X_CNTL_ADC_ENBL |
+ TSL2X7X_CNTL_PROX_DET_ENBL;
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
+ if (ret < 0) {
+ dev_err(&chip->client->dev, "tsl2x7x_chip_on failed on 2nd CTRL reg.\n");
+ return ret;
+ }
+
+ chip->tsl2x7x_chip_status = TSL2X7X_CHIP_WORKING;
+
+ if (chip->tsl2x7x_settings.interrupts_en != 0) {
+ dev_info(&chip->client->dev, "Setting Up Interrupt(s)\n");
+ /* first time interrupt */
+ chip->init_done = 0;
+
+
+ reg_val = TSL2X7X_CNTL_PWR_ON | TSL2X7X_CNTL_ADC_ENBL;
+
+ if ((chip->tsl2x7x_settings.interrupts_en == 0x20) ||
+ (chip->tsl2x7x_settings.interrupts_en == 0x30))
+ reg_val |= TSL2X7X_CNTL_PROX_DET_ENBL;
+
+ reg_val |= chip->tsl2x7x_settings.interrupts_en;
+
+ ret = i2c_smbus_write_byte_data(chip->client,
+ (TSL2X7X_CMD_REG | TSL2X7X_CNTRL), reg_val);
+ if (ret < 0)
+ dev_err(&chip->client->dev,
+ "tsl2x7x_i2c_write to device failed in tsl2x7x_IOCTL_INT_SET.\n");
+
+ /* Clear out any initial interrupts */
+ ret = i2c_smbus_write_byte(chip->client,
+ TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
+ TSL2X7X_CMD_PROXALS_INT_CLR);
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "tsl2x7x_i2c_write_command failed in tsl2x7x_chip_on\n");
+ return ret;
+ }
+ }
+
+ return ret;
+}
+
+static int tsl2x7x_chip_off(struct iio_dev *indio_dev)
+{
+ int ret;
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+
+ /* turn device off */
+ chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
+
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2X7X_CMD_REG | TSL2X7X_CNTRL, 0x00);
+
+ if (chip->pdata && chip->pdata->power_off)
+ chip->pdata->power_off(chip->client);
+
+ return ret;
+}
+
+/**
+ * Integer Square Root
+ * We need an integer version since 1st Floating point is not allowed
+ * in driver world, 2nd, cannot count on the devices having a FPU, and
+ * 3rd software FP emulation may be excessive.
+ */
+static unsigned long tsl2x7x_isqrt(unsigned long x)
+{
+ register unsigned long op, res, one;
+ op = x;
+ res = 0;
+
+ one = 1 << 30;
+ while (one > op)
+ one >>= 2;
+
+ while (one != 0) {
+ if (op >= res + one) {
+ op -= res + one;
+ res += one << 1;
+ }
+ res >>= 1;
+ one >>= 2;
+ }
+
+ return res;
+}
+
+/*
+ * Proximity calibration helper function
+ * runs through a collection of data samples,
+ * sets the min, max, mean, and std dev.
+ */
+static
+void tsl2x7x_prox_calculate(u16 *data, int length, struct prox_stat *statP)
+{
+ int i;
+ int min, max, sum, mean;
+ unsigned long stddev;
+ int tmp;
+
+ if (length == 0)
+ length = 1;
+
+ sum = 0;
+ min = 0xffff;
+ max = 0;
+ for (i = 0; i < length; i++) {
+ sum += data[i];
+ if (data[i] < min)
+ min = data[i];
+ if (data[i] > max)
+ max = data[i];
+ }
+ mean = sum/length;
+ statP->min = min;
+ statP->max = max;
+ statP->mean = mean;
+
+ sum = 0;
+ for (i = 0; i < length; i++) {
+ tmp = data[i]-mean;
+ sum += tmp * tmp;
+ }
+ stddev = tsl2x7x_isqrt((long)sum)/length;
+ statP->stddev = stddev;
+
+}
+
+/**
+ * Proximity calibration - collects a number of samples,
+ * calculates a standard deviation based on the samples, and
+ * sets the threshold accordingly.
+ */
+static void tsl2x7x_prox_cal(struct iio_dev *indio_dev)
+{
+ u16 prox_history[MAX_SAMPLES_CAL+1];
+ int i;
+ struct prox_stat prox_stat_data[2];
+ struct prox_stat *calP;
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+ u8 tmp_irq_settings;
+ u8 current_state = chip->tsl2x7x_chip_status;
+
+ if (chip->tsl2x7x_settings.prox_max_samples_cal > MAX_SAMPLES_CAL) {
+ dev_err(&chip->client->dev,
+ "max prox samples cal is too big: %d\n",
+ chip->tsl2x7x_settings.prox_max_samples_cal);
+ chip->tsl2x7x_settings.prox_max_samples_cal = MAX_SAMPLES_CAL;
+ }
+
+ /* have to stop to change settings */
+ tsl2x7x_chip_off(indio_dev);
+
+ /* Enable proximity detection save just in case prox not wanted yet*/
+ tmp_irq_settings = chip->tsl2x7x_settings.interrupts_en;
+ chip->tsl2x7x_settings.interrupts_en |= TSL2X7X_CNTL_PROX_INT_ENBL;
+
+ /*turn on device if not already on*/
+ tsl2x7x_chip_on(indio_dev);
+
+ /*gather the samples*/
+ for (i = 0; i < chip->tsl2x7x_settings.prox_max_samples_cal; i++) {
+ mdelay(15);
+ tsl2x7x_prox_poll(indio_dev);
+ prox_history[i] = chip->prox_cur_info.prox_data;
+ dev_info(&chip->client->dev, "2 i=%d prox data= %d\n",
+ i, chip->prox_cur_info.prox_data);
+
+ }
+
+ tsl2x7x_chip_off(indio_dev);
+
+ calP = &prox_stat_data[PROX_STAT_CAL];
+ tsl2x7x_prox_calculate(prox_history,
+ chip->tsl2x7x_settings.prox_max_samples_cal, calP);
+ chip->tsl2x7x_settings.prox_thres_high = (calP->max << 1) - calP->mean;
+
+ dev_info(&chip->client->dev, " cal min=%d mean=%d max=%d\n",
+ calP->min, calP->mean, calP->max);
+ dev_info(&chip->client->dev,
+ "%s proximity threshold set to %d\n",
+ chip->client->name, chip->tsl2x7x_settings.prox_thres_high);
+
+ /* back to the way they were */
+ chip->tsl2x7x_settings.interrupts_en = tmp_irq_settings;
+ if (current_state == TSL2X7X_CHIP_WORKING)
+ tsl2x7x_chip_on(indio_dev);
+}
+
+static ssize_t tsl2x7x_power_state_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", chip->tsl2x7x_chip_status);
+}
+
+static ssize_t tsl2x7x_power_state_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ bool value;
+
+ if (strtobool(buf, &value))
+ return -EINVAL;
+
+ if (!value)
+ tsl2x7x_chip_off(indio_dev);
+ else
+ tsl2x7x_chip_on(indio_dev);
+
+ return len;
+}
+
+static ssize_t tsl2x7x_gain_available_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+
+ if (chip->id > tsl2771)
+ return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 128");
+ else
+ return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 120");
+}
+
+static ssize_t tsl2x7x_prox_gain_available_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%s\n", "1 2 4 8");
+}
+
+static ssize_t tsl2x7x_als_time_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+
+ return snprintf(buf, PAGE_SIZE, "%d\n",
+ chip->tsl2x7x_settings.als_time);
+}
+
+static ssize_t tsl2x7x_als_time_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+ unsigned long value;
+
+ if (kstrtoul(buf, 0, &value))
+ return -EINVAL;
+
+ if ((value < 50) || (value > 650))
+ return -EINVAL;
+
+ if (value % 50)
+ return -EINVAL;
+
+ chip->tsl2x7x_settings.als_time = value;
+
+ return len;
+}
+
+static IIO_CONST_ATTR(illuminance0_integration_time_available,
+ "50 100 150 200 250 300 350 400 450 500 550 600 650");
+
+static ssize_t tsl2x7x_als_cal_target_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+
+ return snprintf(buf, PAGE_SIZE, "%d\n",
+ chip->tsl2x7x_settings.als_cal_target);
+}
+
+static ssize_t tsl2x7x_als_cal_target_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+ unsigned long value;
+
+ if (kstrtoul(buf, 0, &value))
+ return -EINVAL;
+
+ if (value)
+ chip->tsl2x7x_settings.als_cal_target = value;
+
+ return len;
+}
+
+/* sampling_frequency AKA persistence in data sheet */
+static ssize_t tsl2x7x_als_persistence_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+
+ return snprintf(buf, PAGE_SIZE, "%d\n",
+ chip->tsl2x7x_settings.als_persistence);
+}
+
+static ssize_t tsl2x7x_als_persistence_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+ unsigned long value;
+
+ if (kstrtoul(buf, 0, &value))
+ return -EINVAL;
+
+ chip->tsl2x7x_settings.als_persistence = value;
+
+ return len;
+}
+
+static IIO_CONST_ATTR(sampling_frequency_available,
+ "0x00 - 0xFF (0 - 255)");
+
+static ssize_t tsl2x7x_do_calibrate(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ bool value;
+
+ if (strtobool(buf, &value))
+ return -EINVAL;
+
+ if (value)
+ tsl2x7x_als_calibrate(indio_dev);
+
+ return len;
+}
+
+static ssize_t tsl2x7x_luxtable_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+ int i;
+ int offset = 0;
+
+ i = 0;
+ while (i < (TSL2X7X_MAX_LUX_TABLE_SIZE * 3)) {
+ offset += snprintf(buf + offset, PAGE_SIZE, "%d,%d,%d,",
+ chip->tsl2x7x_device_lux[i].ratio,
+ chip->tsl2x7x_device_lux[i].ch0,
+ chip->tsl2x7x_device_lux[i].ch1);
+ if (chip->tsl2x7x_device_lux[i].ratio == 0) {
+ /* We just printed the first "0" entry.
+ * Now get rid of the extra "," and break. */
+ offset--;
+ break;
+ }
+ i++;
+ }
+
+ offset += snprintf(buf + offset, PAGE_SIZE, "\n");
+ return offset;
+}
+
+static ssize_t tsl2x7x_luxtable_store(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+ int value[ARRAY_SIZE(chip->tsl2x7x_device_lux)*3 + 1];
+ int n;
+
+ get_options(buf, ARRAY_SIZE(value), value);
+
+ /* We now have an array of ints starting at value[1], and
+ * enumerated by value[0].
+ * We expect each group of three ints is one table entry,
+ * and the last table entry is all 0.
+ */
+ n = value[0];
+ if ((n % 3) || n < 6 ||
+ n > ((ARRAY_SIZE(chip->tsl2x7x_device_lux) - 1) * 3)) {
+ dev_info(dev, "LUX TABLE INPUT ERROR 1 Value[0]=%d\n", n);
+ return -EINVAL;
+ }
+
+ if ((value[(n - 2)] | value[(n - 1)] | value[n]) != 0) {
+ dev_info(dev, "LUX TABLE INPUT ERROR 2 Value[0]=%d\n", n);
+ return -EINVAL;
+ }
+
+ if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING)
+ tsl2x7x_chip_off(indio_dev);
+
+ /* Zero out the table */
+ memset(chip->tsl2x7x_device_lux, 0, sizeof(chip->tsl2x7x_device_lux));
+ memcpy(chip->tsl2x7x_device_lux, &value[1], (value[0] * 4));
+
+ return len;
+}
+
+static ssize_t tsl2x7x_do_prox_calibrate(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ bool value;
+
+ if (strtobool(buf, &value))
+ return -EINVAL;
+
+ if (value)
+ tsl2x7x_prox_cal(indio_dev);
+
+ return len;
+}
+
+static int tsl2x7x_read_interrupt_config(struct iio_dev *indio_dev,
+ u64 event_code)
+{
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+ int ret;
+
+ if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_LIGHT)
+ ret = !!(chip->tsl2x7x_settings.interrupts_en & 0x10);
+ else
+ ret = !!(chip->tsl2x7x_settings.interrupts_en & 0x20);
+
+ return ret;
+}
+
+static int tsl2x7x_write_interrupt_config(struct iio_dev *indio_dev,
+ u64 event_code,
+ int val)
+{
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+
+ if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_LIGHT) {
+ if (val)
+ chip->tsl2x7x_settings.interrupts_en |= 0x10;
+ else
+ chip->tsl2x7x_settings.interrupts_en &= 0x20;
+ } else {
+ if (val)
+ chip->tsl2x7x_settings.interrupts_en |= 0x20;
+ else
+ chip->tsl2x7x_settings.interrupts_en &= 0x10;
+ }
+
+ return 0;
+}
+
+static int tsl2x7x_write_thresh(struct iio_dev *indio_dev,
+ u64 event_code,
+ int val)
+{
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+
+ if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_LIGHT) {
+ switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
+ case IIO_EV_DIR_RISING:
+ chip->tsl2x7x_settings.als_thresh_high = val;
+ break;
+ case IIO_EV_DIR_FALLING:
+ chip->tsl2x7x_settings.als_thresh_low = val;
+ break;
+ default:
+ return -EINVAL;
+ }
+ } else {
+ switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
+ case IIO_EV_DIR_RISING:
+ chip->tsl2x7x_settings.prox_thres_high = val;
+ break;
+ case IIO_EV_DIR_FALLING:
+ chip->tsl2x7x_settings.prox_thres_low = val;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ }
+
+ return 0;
+}
+
+static int tsl2x7x_read_thresh(struct iio_dev *indio_dev,
+ u64 event_code,
+ int *val)
+{
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+
+ if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_LIGHT) {
+ switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
+ case IIO_EV_DIR_RISING:
+ *val = chip->tsl2x7x_settings.als_thresh_high;
+ break;
+ case IIO_EV_DIR_FALLING:
+ *val = chip->tsl2x7x_settings.als_thresh_low;
+ break;
+ default:
+ return -EINVAL;
+ }
+ } else {
+ switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
+ case IIO_EV_DIR_RISING:
+ *val = chip->tsl2x7x_settings.prox_thres_high;
+ break;
+ case IIO_EV_DIR_FALLING:
+ *val = chip->tsl2x7x_settings.prox_thres_low;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ }
+
+ return 0;
+}
+
+static int tsl2x7x_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long mask)
+{
+ int ret = -EINVAL;
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+
+ switch (mask) {
+ case 0:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ tsl2x7x_get_lux(indio_dev);
+ if (chan->processed_val)
+ *val = chip->als_cur_info.lux;
+ else
+ *val = (((chip->als_cur_info.als_ch0 << 16) |
+ chip->als_cur_info.als_ch1));
+ ret = IIO_VAL_INT;
+ break;
+ case IIO_PROXIMITY:
+ tsl2x7x_prox_poll(indio_dev);
+ if (chan->processed_val)
+ *val = chip->prox_cur_info.prox_event;
+ else
+ *val = chip->prox_cur_info.prox_data;
+ ret = IIO_VAL_INT;
+ break;
+ default:
+ return -EINVAL;
+ break;
+ }
+ break;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ if (chan->type == IIO_LIGHT)
+ *val =
+ tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain];
+ else
+ *val =
+ tsl2X7X_prx_gainadj[chip->tsl2x7x_settings.prox_gain];
+ ret = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ *val = chip->tsl2x7x_settings.als_gain_trim;
+ ret = IIO_VAL_INT;
+ break;
+
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static int tsl2x7x_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_CALIBSCALE:
+ if (chan->type == IIO_LIGHT) {
+ switch (val) {
+ case 1:
+ chip->tsl2x7x_settings.als_gain = 0;
+ break;
+ case 8:
+ chip->tsl2x7x_settings.als_gain = 1;
+ break;
+ case 16:
+ chip->tsl2x7x_settings.als_gain = 2;
+ break;
+ case 120:
+ if (chip->id > tsl2771)
+ return -EINVAL;
+ chip->tsl2x7x_settings.als_gain = 3;
+ break;
+ case 128:
+ if (chip->id < tsl2572)
+ return -EINVAL;
+ chip->tsl2x7x_settings.als_gain = 3;
+ break;
+ default:
+ return -EINVAL;
+ }
+ } else {
+ switch (val) {
+ case 1:
+ chip->tsl2x7x_settings.prox_gain = 0;
+ break;
+ case 2:
+ chip->tsl2x7x_settings.prox_gain = 1;
+ break;
+ case 4:
+ chip->tsl2x7x_settings.prox_gain = 2;
+ break;
+ case 8:
+ chip->tsl2x7x_settings.prox_gain = 3;
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+ break;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ chip->tsl2x7x_settings.als_gain_trim = val;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR,
+ tsl2x7x_power_state_show, tsl2x7x_power_state_store);
+
+static DEVICE_ATTR(proximity_calibscale_available, S_IRUGO,
+ tsl2x7x_prox_gain_available_show, NULL);
+
+static DEVICE_ATTR(illuminance0_calibscale_available, S_IRUGO,
+ tsl2x7x_gain_available_show, NULL);
+
+static DEVICE_ATTR(illuminance0_integration_time, S_IRUGO | S_IWUSR,
+ tsl2x7x_als_time_show, tsl2x7x_als_time_store);
+
+static DEVICE_ATTR(illuminance0_target_input, S_IRUGO | S_IWUSR,
+ tsl2x7x_als_cal_target_show, tsl2x7x_als_cal_target_store);
+
+static DEVICE_ATTR(illuminance0_calibrate, S_IWUSR, NULL,
+ tsl2x7x_do_calibrate);
+
+static DEVICE_ATTR(proximity_calibrate, S_IWUSR, NULL,
+ tsl2x7x_do_prox_calibrate);
+
+static DEVICE_ATTR(illuminance0_lux_table, S_IRUGO | S_IWUSR,
+ tsl2x7x_luxtable_show, tsl2x7x_luxtable_store);
+
+static DEVICE_ATTR(sampling_frequency, S_IRUGO | S_IWUSR,
+ tsl2x7x_als_persistence_show, tsl2x7x_als_persistence_store);
+
+/* Use the default register values to identify the Taos device */
+static int tsl2x7x_device_id(unsigned char *id, int target)
+{
+ switch (target) {
+ case tsl2571:
+ case tsl2671:
+ case tsl2771:
+ return ((*id & 0xf0) == TRITON_ID);
+ break;
+ case tmd2671:
+ case tmd2771:
+ return ((*id & 0xf0) == HALIBUT_ID);
+ break;
+ case tsl2572:
+ case tsl2672:
+ case tmd2672:
+ case tsl2772:
+ case tmd2772:
+ return ((*id & 0xf0) == SWORDFISH_ID);
+ break;
+ }
+
+ return -EINVAL;
+}
+
+/*
+ * Interrupt Event Handler */
+static irqreturn_t tsl2x7x_event_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+ s64 timestamp = iio_get_time_ns();
+ int ret;
+ int value;
+
+ value = i2c_smbus_read_byte_data(chip->client,
+ TSL2X7X_CMD_REG | TSL2X7X_STATUS);
+
+ /* What type of interrupt do we need to process */
+ if (value & TSL2X7X_STA_PRX_INTR) {
+ tsl2x7x_prox_poll(indio_dev);
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY,
+ 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_EITHER),
+ timestamp);
+ }
+
+ if (value & TSL2X7X_STA_ALS_INTR) {
+ tsl2x7x_get_lux(indio_dev);
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_LIGHT,
+ 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_EITHER),
+ timestamp);
+ }
+ /* Clear interrupt now that we have the status */
+ ret = i2c_smbus_write_byte(chip->client,
+ TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
+ TSL2X7X_CMD_PROXALS_INT_CLR);
+ if (ret < 0)
+ dev_err(&chip->client->dev,
+ "Failed to clear irq from event handler. err = %d\n", ret);
+
+ return IRQ_HANDLED;
+}
+
+static struct attribute *tsl2x7x_ALS_device_attrs[] = {
+ &dev_attr_power_state.attr,
+ &dev_attr_illuminance0_calibscale_available.attr,
+ &dev_attr_illuminance0_integration_time.attr,
+ &iio_const_attr_illuminance0_integration_time_available.dev_attr.attr,
+ &dev_attr_illuminance0_target_input.attr,
+ &dev_attr_illuminance0_calibrate.attr,
+ &dev_attr_illuminance0_lux_table.attr,
+ &dev_attr_sampling_frequency.attr,
+ &iio_const_attr_sampling_frequency_available.dev_attr.attr,
+ NULL
+};
+
+static struct attribute *tsl2x7x_PRX_device_attrs[] = {
+ &dev_attr_power_state.attr,
+ &dev_attr_sampling_frequency.attr,
+ &iio_const_attr_sampling_frequency_available.dev_attr.attr,
+ &dev_attr_proximity_calibrate.attr,
+ NULL
+};
+
+static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = {
+ &dev_attr_power_state.attr,
+ &dev_attr_illuminance0_calibscale_available.attr,
+ &dev_attr_illuminance0_integration_time.attr,
+ &iio_const_attr_illuminance0_integration_time_available.dev_attr.attr,
+ &dev_attr_illuminance0_target_input.attr,
+ &dev_attr_illuminance0_calibrate.attr,
+ &dev_attr_illuminance0_lux_table.attr,
+ &dev_attr_sampling_frequency.attr,
+ &iio_const_attr_sampling_frequency_available.dev_attr.attr,
+ &dev_attr_proximity_calibrate.attr,
+ NULL
+};
+
+static struct attribute *tsl2x7x_PRX2_device_attrs[] = {
+ &dev_attr_power_state.attr,
+ &dev_attr_sampling_frequency.attr,
+ &iio_const_attr_sampling_frequency_available.dev_attr.attr,
+ &dev_attr_proximity_calibrate.attr,
+ &dev_attr_proximity_calibscale_available.attr,
+ NULL
+};
+
+static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] = {
+ &dev_attr_power_state.attr,
+ &dev_attr_illuminance0_calibscale_available.attr,
+ &dev_attr_illuminance0_integration_time.attr,
+ &iio_const_attr_illuminance0_integration_time_available.dev_attr.attr,
+ &dev_attr_illuminance0_target_input.attr,
+ &dev_attr_illuminance0_calibrate.attr,
+ &dev_attr_illuminance0_lux_table.attr,
+ &dev_attr_sampling_frequency.attr,
+ &iio_const_attr_sampling_frequency_available.dev_attr.attr,
+ &dev_attr_proximity_calibrate.attr,
+ &dev_attr_proximity_calibscale_available.attr,
+ NULL
+};
+
+static const struct attribute_group tsl2X7X_device_attr_group_tbl[] = {
+ [ALS] = {
+ .attrs = tsl2x7x_ALS_device_attrs,
+ },
+ [PRX] = {
+ .attrs = tsl2x7x_PRX_device_attrs,
+ },
+ [ALSPRX] = {
+ .attrs = tsl2x7x_ALSPRX_device_attrs,
+ },
+ [PRX2] = {
+ .attrs = tsl2x7x_PRX2_device_attrs,
+ },
+ [ALSPRX2] = {
+ .attrs = tsl2x7x_ALSPRX2_device_attrs,
+ },
+};
+
+static const struct iio_info tsl2X7X_device_info[] = {
+ [ALS] = {
+ .attrs = &tsl2X7X_device_attr_group_tbl[ALS],
+ .driver_module = THIS_MODULE,
+ .read_raw = &tsl2x7x_read_raw,
+ .write_raw = &tsl2x7x_write_raw,
+ .read_event_value = &tsl2x7x_read_thresh,
+ .write_event_value = &tsl2x7x_write_thresh,
+ .read_event_config = &tsl2x7x_read_interrupt_config,
+ .write_event_config = &tsl2x7x_write_interrupt_config,
+ },
+ [PRX] = {
+ .attrs = &tsl2X7X_device_attr_group_tbl[PRX],
+ .driver_module = THIS_MODULE,
+ .read_raw = &tsl2x7x_read_raw,
+ .write_raw = &tsl2x7x_write_raw,
+ .read_event_value = &tsl2x7x_read_thresh,
+ .write_event_value = &tsl2x7x_write_thresh,
+ .read_event_config = &tsl2x7x_read_interrupt_config,
+ .write_event_config = &tsl2x7x_write_interrupt_config,
+ },
+ [ALSPRX] = {
+ .attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX],
+ .driver_module = THIS_MODULE,
+ .read_raw = &tsl2x7x_read_raw,
+ .write_raw = &tsl2x7x_write_raw,
+ .read_event_value = &tsl2x7x_read_thresh,
+ .write_event_value = &tsl2x7x_write_thresh,
+ .read_event_config = &tsl2x7x_read_interrupt_config,
+ .write_event_config = &tsl2x7x_write_interrupt_config,
+ },
+ [PRX2] = {
+ .attrs = &tsl2X7X_device_attr_group_tbl[PRX2],
+ .driver_module = THIS_MODULE,
+ .read_raw = &tsl2x7x_read_raw,
+ .write_raw = &tsl2x7x_write_raw,
+ .read_event_value = &tsl2x7x_read_thresh,
+ .write_event_value = &tsl2x7x_write_thresh,
+ .read_event_config = &tsl2x7x_read_interrupt_config,
+ .write_event_config = &tsl2x7x_write_interrupt_config,
+ },
+ [ALSPRX2] = {
+ .attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX2],
+ .driver_module = THIS_MODULE,
+ .read_raw = &tsl2x7x_read_raw,
+ .write_raw = &tsl2x7x_write_raw,
+ .read_event_value = &tsl2x7x_read_thresh,
+ .write_event_value = &tsl2x7x_write_thresh,
+ .read_event_config = &tsl2x7x_read_interrupt_config,
+ .write_event_config = &tsl2x7x_write_interrupt_config,
+ },
+};
+
+static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
+ [ALS] = {
+ .channel = {
+ [0] = {
+ .type = IIO_LIGHT,
+ .indexed = 1,
+ .channel = 0,
+ .processed_val = 1,
+ },
+ [1] = {
+ .type = IIO_LIGHT,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask =
+ IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
+ IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
+ .event_mask = TSL2X7X_EVENT_MASK
+ },
+ },
+ .num_channels = 2,
+ .info = &tsl2X7X_device_info[ALS],
+ },
+ [PRX] = {
+ .channel = {
+ [0] = {
+ .type = IIO_PROXIMITY,
+ .indexed = 1,
+ .channel = 0,
+ .processed_val = 1,
+ },
+ [1] = {
+ .type = IIO_PROXIMITY,
+ .indexed = 1,
+ .channel = 0,
+ .event_mask = TSL2X7X_EVENT_MASK
+ },
+ },
+ .num_channels = 2,
+ .info = &tsl2X7X_device_info[PRX],
+ },
+ [ALSPRX] = {
+ .channel = {
+ [0] = {
+ .type = IIO_LIGHT,
+ .indexed = 1,
+ .channel = 0,
+ .processed_val = 1,
+ },
+ [1] = {
+ .type = IIO_LIGHT,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask =
+ IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
+ IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
+ .event_mask = TSL2X7X_EVENT_MASK
+ },
+ [2] = {
+ .type = IIO_PROXIMITY,
+ .indexed = 1,
+ .channel = 0,
+ .processed_val = 1,
+ },
+ [3] = {
+ .type = IIO_PROXIMITY,
+ .indexed = 1,
+ .channel = 0,
+ .processed_val = 0,
+ .event_mask = TSL2X7X_EVENT_MASK
+ },
+ },
+ .num_channels = 4,
+ .info = &tsl2X7X_device_info[ALSPRX],
+ },
+ [PRX2] = {
+ .channel = {
+ [0] = {
+ .type = IIO_PROXIMITY,
+ .indexed = 1,
+ .channel = 0,
+ .processed_val = 1,
+ },
+ [1] = {
+ .type = IIO_PROXIMITY,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask =
+ IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
+ .event_mask = TSL2X7X_EVENT_MASK
+ },
+ },
+ .num_channels = 2,
+ .info = &tsl2X7X_device_info[PRX2],
+ },
+ [ALSPRX2] = {
+ .channel = {
+ [0] = {
+ .type = IIO_LIGHT,
+ .indexed = 1,
+ .channel = 0,
+ .processed_val = 1,
+ },
+ [1] = {
+ .type = IIO_LIGHT,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask =
+ IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
+ IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
+ .event_mask = TSL2X7X_EVENT_MASK
+ },
+ [2] = {
+ .type = IIO_PROXIMITY,
+ .indexed = 1,
+ .channel = 0,
+ .processed_val = 1,
+ },
+ [3] = {
+ .type = IIO_PROXIMITY,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask =
+ IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
+ .event_mask = TSL2X7X_EVENT_MASK
+ },
+ },
+ .num_channels = 4,
+ .info = &tsl2X7X_device_info[ALSPRX2],
+ },
+};
+
+/*
+ * Client probe function.
+ */
+static int __devinit tsl2x7x_probe(struct i2c_client *clientp,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ unsigned char device_id;
+ struct iio_dev *indio_dev;
+ struct tsl2X7X_chip *chip;
+
+ indio_dev = iio_allocate_device(sizeof(*chip));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ chip = iio_priv(indio_dev);
+ chip->client = clientp;
+ i2c_set_clientdata(clientp, indio_dev);
+
+ ret = tsl2x7x_i2c_read(chip->client,
+ TSL2X7X_CHIPID, &device_id);
+ if (ret < 0)
+ goto fail1;
+
+ if ((!tsl2x7x_device_id(&device_id, id->driver_data)) ||
+ (tsl2x7x_device_id(&device_id, id->driver_data) == -EINVAL)) {
+ dev_info(&chip->client->dev, "i2c device found but does not match "
+ "expected id in tsl2x7x_probe()\n");
+ goto fail1;
+ }
+
+ ret = i2c_smbus_write_byte(clientp, (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
+ if (ret < 0) {
+ dev_err(&clientp->dev, "i2c_smbus_write_byte() to cmd reg "
+ "failed in tsl2x7x_probe(), err = %d\n", ret);
+ goto fail1;
+ }
+
+ /* ALS and PROX functions can be invoked via user space poll
+ * or H/W interrupt. If busy return last sample. */
+ mutex_init(&chip->als_mutex);
+ mutex_init(&chip->prox_mutex);
+
+ chip->tsl2x7x_chip_status = TSL2X7X_CHIP_UNKNOWN;
+ chip->pdata = clientp->dev.platform_data;
+ chip->id = id->driver_data;
+ chip->chip_info =
+ &tsl2x7x_chip_info_tbl[device_channel_config[id->driver_data]];
+
+ indio_dev->info = chip->chip_info->info;
+ indio_dev->dev.parent = &clientp->dev;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->name = chip->client->name;
+ indio_dev->channels = chip->chip_info->channel;
+ indio_dev->num_channels = chip->chip_info->num_channels;
+
+ //TAKE ME OUT
+ clientp->irq = 20;
+
+ if (clientp->irq) {
+ ret = request_threaded_irq(clientp->irq,
+ NULL,
+ &tsl2x7x_event_handler,
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ "TSL2X7X_event",
+ indio_dev);
+ if (ret) {
+ dev_err(&clientp->dev, "irq request failed");
+ goto fail2;
+ }
+ }
+
+ /* Load up the defaults */
+ tsl2x7x_defaults(chip);
+ /* Make sure the chip is on */
+ tsl2x7x_chip_on(indio_dev);
+
+ ret = iio_device_register(indio_dev);
+ if (ret) {
+ dev_err(&clientp->dev, "iio registration failed\n");
+ goto fail3;
+ }
+
+ dev_info(&clientp->dev, "%s Light sensor found.\n", id->name);
+
+ return 0;
+
+fail3:
+ if (clientp->irq)
+ free_irq(clientp->irq, indio_dev);
+fail2:
+ iio_free_device(indio_dev);
+fail1:
+ kfree(chip);
+ return ret;
+}
+
+static int tsl2x7x_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+ int ret = 0;
+
+ if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
+ ret = tsl2x7x_chip_off(indio_dev);
+ chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
+ }
+
+ if (chip->pdata && chip->pdata->platform_power) {
+ pm_message_t pmm = {PM_EVENT_SUSPEND};
+ chip->pdata->platform_power(dev, pmm);
+ }
+
+ return ret;
+}
+
+static int tsl2x7x_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+ int ret = 0;
+
+ if (chip->pdata && chip->pdata->platform_power) {
+ pm_message_t pmm = {PM_EVENT_RESUME};
+ chip->pdata->platform_power(dev, pmm);
+ }
+
+ if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_SUSPENDED)
+ ret = tsl2x7x_chip_on(indio_dev);
+
+ return ret;
+}
+
+static int __devexit tsl2x7x_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct tsl2X7X_chip *chip = i2c_get_clientdata(client);
+
+ tsl2x7x_chip_off(indio_dev);
+
+ if (client->irq)
+ free_irq(client->irq, chip->client->name);
+
+ iio_free_device(indio_dev);
+
+ return 0;
+}
+
+static struct i2c_device_id tsl2x7x_idtable[] = {
+ { "tsl2571", tsl2571 },
+ { "tsl2671", tsl2671 },
+ { "tmd2671", tmd2671 },
+ { "tsl2771", tsl2771 },
+ { "tmd2771", tmd2771 },
+ { "tsl2572", tsl2572 },
+ { "tsl2672", tsl2672 },
+ { "tmd2672", tmd2672 },
+ { "tsl2772", tsl2772 },
+ { "tmd2772", tmd2772 },
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, tsl2x7x_idtable);
+
+static const struct dev_pm_ops tsl2x7x_pm_ops = {
+ .suspend = tsl2x7x_suspend,
+ .resume = tsl2x7x_resume,
+};
+
+/* Driver definition */
+static struct i2c_driver tsl2x7x_driver = {
+ .driver = {
+ .name = "tsl2x7x",
+ .pm = &tsl2x7x_pm_ops,
+ },
+ .id_table = tsl2x7x_idtable,
+ .probe = tsl2x7x_probe,
+ .remove = __devexit_p(tsl2x7x_remove),
+};
+
+module_i2c_driver(tsl2x7x_driver);
+
+MODULE_AUTHOR("J. August Brenner<jbrenner@taosinc.com>");
+MODULE_DESCRIPTION("TAOS tsl2x7x ambient and proximity light sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/staging/iio/light/tsl2x7x_core.h b/drivers/staging/iio/light/tsl2x7x_core.h
new file mode 100644
index 0000000..663e846
--- /dev/null
+++ b/drivers/staging/iio/light/tsl2x7x_core.h
@@ -0,0 +1,75 @@
+/*
+ * Device driver for monitoring ambient light intensity (lux)
+ * and proximity (prox) within the TAOS TSL2X7X family of devices.
+ *
+ * Copyright (c) 2012, TAOS Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __TSL2X7X_H
+#define __TSL2X7X_H
+#include <linux/pm.h>
+
+/* Max number of segments allowable in LUX table */
+#define TSL2X7X_MAX_LUX_TABLE_SIZE 9
+#define MAX_DEFAULT_TABLE_BYTES (sizeof(int) * TSL2X7X_MAX_LUX_TABLE_SIZE)
+
+struct iio_dev;
+struct iio_chan_spec;
+
+struct tsl2x7x_lux {
+ unsigned int ratio;
+ unsigned int ch0;
+ unsigned int ch1;
+};
+
+/* Refer to tsl2x7x_default_settings for member desc. */
+struct tsl2x7x_settings {
+ int als_time;
+ int als_gain;
+ int als_gain_trim;
+ int wait_time;
+ int prx_time;
+ int prox_gain;
+ int prox_config;
+ int als_cal_target;
+ u8 interrupts_en;
+ u8 als_persistence;
+ int als_thresh_low;
+ int als_thresh_high;
+ int prox_thres_low;
+ int prox_thres_high;
+ int prox_pulse_count;
+ int prox_max_samples_cal;
+};
+
+/* struct tsl2x7x_platform_data -
+ * Platform unique glass and defaults
+ * Platform PM functions. */
+struct tsl2X7X_platform_data {
+ /* Suspend/resume platform cb */
+ int (*platform_power)(struct device *dev, pm_message_t);
+ /* The following callback gets called when the device is powered on */
+ int (*power_on) (struct iio_dev *indio_dev);
+ /* The following callback gets called when the device is powered off */
+ int (*power_off) (struct i2c_client *dev);
+ /* These are the device specific glass coefficents used to
+ * calculate Lux */
+ struct tsl2x7x_lux platform_lux_table[TSL2X7X_MAX_LUX_TABLE_SIZE];
+ struct tsl2x7x_settings *platform_default_settings;
+};
+
+#endif /* __TSL2X7X_H */
--
1.7.4.1