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SubjectRe: [PATCH V8] TAOS tsl2x7x

> TAOS device driver (version 8) for the tsl/tmd 2771 and 2772 device families (inc. all variants).
>
> updates:
> Documentation - added prefix corrections as suggested, corrected document merge issue.
> Code - added remaining 'in_' prefixs.
Jon,

A couple of trivial points, but nothing that means I want to comment
again before you send
it to Greg.

1) White space issues - there are a couple of bonus white lines that
have snuck in during
editting. It's silly, but if you don't fix them now someone else will
send a trivial patch
doing it and annoy us all ;)

2) Ideally the fixes to prefixes in sysfs-bus-iio-light would be a
separate patch.
Thanks for doing these, but they stand on their own independent of the
driver
and as such should be their own patch. If they had happened earlier in the
reviews of this driver I'd have asked you to pull them out simply so we
could
merge that patch whilst still working on the driver! But as the driver
is now
fine its alright to leave them in here this time...

Nice driver. Thanks! Looking foward to the next one :)

Fix the white space and I'm happy to see this go in asap (at least
white space changes as trivial as these don't need testing!)
> Signed-off-by: Jon Brenner<jbrenner@taosinc.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
> ---
> .../light/sysfs-bus-iio-light-tsl2583 | 6 +
> .../light/sysfs-bus-iio-light-tsl2x7x | 13 +
> drivers/staging/iio/Documentation/sysfs-bus-iio | 10 +
> .../staging/iio/Documentation/sysfs-bus-iio-light | 15 +-
> drivers/staging/iio/light/Kconfig | 8 +
> drivers/staging/iio/light/Makefile | 1 +
> drivers/staging/iio/light/tsl2x7x.h | 100 +
> drivers/staging/iio/light/tsl2x7x_core.c | 2076 ++++++++++++++++++++
> 8 files changed, 2221 insertions(+), 8 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 100755
> index 0000000..470f7ad
> --- /dev/null
> +++ b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2583
> @@ -0,0 +1,6 @@
> +What: /sys/bus/iio/devices/device[n]/in_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 100755
> index 0000000..b2798b2
> --- /dev/null
> +++ b/drivers/staging/iio/Documentation/light/sysfs-bus-iio-light-tsl2x7x
> @@ -0,0 +1,13 @@
> +What: /sys/bus/iio/devices/device[n]/in_illuminance0_calibrate
> +KernelVersion: 3.3-rc1
> +Contact: linux-iio@vger.kernel.org
> +Description:
> + Causes an internal calibration of the als gain trim
> + value which is later used in calculating illuminance in lux.
> +
> +What: /sys/bus/iio/devices/device[n]/in_proximity0_calibrate
> +KernelVersion: 3.3-rc1
> +Contact: linux-iio@vger.kernel.org
> +Description:
> + Causes a 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 ca12784..eec9acb 100644
> --- a/drivers/staging/iio/Documentation/sysfs-bus-iio
> +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio
> @@ -243,6 +243,8 @@ What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibbias
> What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibbias
> What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibbias
> What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibbias
> +What: /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibbias
> +What: /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibbias
> KernelVersion: 2.6.35
> Contact: linux-iio@vger.kernel.org
> Description:
> @@ -258,6 +260,8 @@ 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/in_illuminance0_calibscale
> +what /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibscale
> KernelVersion: 2.6.35
> Contact: linux-iio@vger.kernel.org
> Description:
> @@ -457,6 +461,10 @@ What: /sys/.../events/in_voltageY_raw_thresh_rising_value
> What: /sys/.../events/in_voltageY_raw_thresh_falling_value
> What: /sys/.../events/in_tempY_raw_thresh_rising_value
> What: /sys/.../events/in_tempY_raw_thresh_falling_value
> +What: /sys/.../events/in_illuminance0_thresh_falling_value
> +what: /sys/.../events/in_illuminance0_thresh_rising_value
> +what: /sys/.../events/in_proximity0_thresh_falling_value
> +what: /sys/.../events/in_proximity0_thresh_rising_value
> KernelVersion: 2.6.37
> Contact: linux-iio@vger.kernel.org
> Description:
> @@ -556,6 +564,8 @@ What: /sys/.../events/in_tempY_thresh_falling_period
> What: /sys/.../events/in_tempY_roc_rising_period
> What: /sys/.../events/in_tempY_roc_falling_period
> What: /sys/.../events/in_accel_x&y&z_mag_falling_period
> +What: /sys/.../events/in_intensity0_thresh_period
> +What: /sys/.../events/in_proximity0_thresh_period
> KernelVersion: 2.6.37
> Contact: linux-iio@vger.kernel.org
> Description:
> diff --git a/drivers/staging/iio/Documentation/sysfs-bus-iio-light b/drivers/staging/iio/Documentation/sysfs-bus-iio-light
> index edbf470..715c74d 100644
> --- a/drivers/staging/iio/Documentation/sysfs-bus-iio-light
> +++ b/drivers/staging/iio/Documentation/sysfs-bus-iio-light
> @@ -26,7 +26,7 @@ Description:
> Hardware dependent list of possible values supported for the
> adc_resolution of the given sensor.
>
> -What: /sys/bus/iio/devices/device[n]/illuminance0[_input|_raw]
> +What: /sys/bus/iio/devices/device[n]/in_illuminance0[_input|_raw]
> KernelVersion: 2.6.35
> Contact: linux-iio@vger.kernel.org
> Description:
> @@ -45,7 +45,7 @@ Description:
> do this calculation manually by reading the infrared sensor
> value and doing the negation in sw.
>
> -What: /sys/bus/iio/devices/device[n]/proximity[_input|_raw]
> +What: /sys/bus/iio/devices/device[n]/in_proximity[_input|_raw]
> KernelVersion: 2.6.37
> Contact: linux-iio@vger.kernel.org
> Description:
> @@ -63,23 +63,22 @@ Description:
> and if expressed in SI units, should include _input. If this
> value is not in SI units, then it should include _raw.
>
> -What: /sys/bus/iio/devices/device[n]/illuminance0_target
> +What: /sys/bus/iio/devices/device[n]/in_illuminance0_target
> KernelVersion: 2.6.37
> Contact: linux-iio@vger.kernel.org
> Description:
> This property gets/sets the last known external
> lux measurement used in/for calibration.
>
> -What: /sys/bus/iio/devices/device[n]/illuminance0_integration_time
> +What: /sys/bus/iio/devices/device[n]/in_illuminance0_integration_time
> KernelVersion: 2.6.37
> 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]/in_illuminance0_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 bb633f6..821ad6b 100644
> --- a/drivers/staging/iio/light/Kconfig
> +++ b/drivers/staging/iio/light/Kconfig
> @@ -41,4 +41,12 @@ 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 535d313..141af1e 100644
> --- a/drivers/staging/iio/light/Makefile
> +++ b/drivers/staging/iio/light/Makefile
> @@ -6,3 +6,4 @@ obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o
> obj-$(CONFIG_SENSORS_ISL29018) += isl29018.o
> obj-$(CONFIG_SENSORS_ISL29028) += isl29028.o
> obj-$(CONFIG_TSL2583) += tsl2583.o
> +obj-$(CONFIG_TSL2x7x) += tsl2x7x_core.o
> diff --git a/drivers/staging/iio/light/tsl2x7x.h b/drivers/staging/iio/light/tsl2x7x.h
> new file mode 100755
> index 0000000..c4acf5f
> --- /dev/null
> +++ b/drivers/staging/iio/light/tsl2x7x.h
> @@ -0,0 +1,100 @@
> +/*
> + * Device driver for monitoring ambient light intensity (lux)
> + * and proximity (prox) within the TAOS TSL2X7X family of devices.
> + *
> + * Copyright (c) 2012, TAOS Corporation.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
> + * more details.
> + *
> + * You should have received a copy of the GNU General Public License along
> + * with this program; if not, write to the Free Software Foundation, Inc.,
> + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
> + */
> +
> +#ifndef __TSL2X7X_H
> +#define __TSL2X7X_H
> +#include<linux/pm.h>
> +
> +/* Max number of segments allowable in LUX table */
> +#define TSL2X7X_MAX_LUX_TABLE_SIZE 9
> +#define MAX_DEFAULT_TABLE_BYTES (sizeof(int) * TSL2X7X_MAX_LUX_TABLE_SIZE)
> +
> +struct iio_dev;
> +
> +struct tsl2x7x_lux {
> + unsigned int ratio;
> + unsigned int ch0;
> + unsigned int ch1;
> +};
> +
> +/**
> + * struct tsl2x7x_default_settings - power on defaults unless
> + * overridden by platform data.
> + * @als_time: ALS Integration time - multiple of 50mS
> + * @als_gain: Index into the ALS gain table.
> + * @als_gain_trim: default gain trim to account for
> + * aperture effects.
> + * @wait_time: Time between PRX and ALS cycles
> + * in 2.7 periods
> + * @prx_time: 5.2ms prox integration time -
> + * decrease in 2.7ms periods
> + * @prx_gain: Proximity gain index
> + * @prox_config: Prox configuration filters.
> + * @als_cal_target: Known external ALS reading for
> + * calibration.
> + * @interrupts_en: Enable/Disable - 0x00 = none, 0x10 = als,
> + * 0x20 = prx, 0x30 = bth
> + * @persistence: H/W Filters, Number of 'out of limits'
> + * ADC readings PRX/ALS.
> + * @als_thresh_low: CH0 'low' count to trigger interrupt.
> + * @als_thresh_high: CH0 'high' count to trigger interrupt.
> + * @prox_thres_low: Low threshold proximity detection.
> + * @prox_thres_high: High threshold proximity detection
> + * @prox_pulse_count: Number if proximity emitter pulses
> + * @prox_max_samples_cal: Used for prox cal.
> + */
> +struct tsl2x7x_settings {
> + int als_time;
> + int als_gain;
> + int als_gain_trim;
> + int wait_time;
> + int prx_time;
> + int prox_gain;
> + int prox_config;
> + int als_cal_target;
> + u8 interrupts_en;
> + u8 persistence;
> + int als_thresh_low;
> + int als_thresh_high;
> + int prox_thres_low;
> + int prox_thres_high;
> + int prox_pulse_count;
> + int prox_max_samples_cal;
> +};
> +
> +/**
> + * struct tsl2X7X_platform_data - Platform callback, glass and defaults
> + * @platform_power: Suspend/resume platform callback
> + * @power_on: Power on callback
> + * @power_off: Power off callback
> + * @platform_lux_table: Device specific glass coefficents
> + * @platform_default_settings: Device specific power on defaults
> + *
> + */
> +struct tsl2X7X_platform_data {
> + int (*platform_power)(struct device *dev, pm_message_t);
> + int (*power_on) (struct iio_dev *indio_dev);
> + int (*power_off) (struct i2c_client *dev);
> + struct tsl2x7x_lux platform_lux_table[TSL2X7X_MAX_LUX_TABLE_SIZE];
> + struct tsl2x7x_settings *platform_default_settings;
> +};
> +
> +#endif /* __TSL2X7X_H */
> diff --git a/drivers/staging/iio/light/tsl2x7x_core.c b/drivers/staging/iio/light/tsl2x7x_core.c
> new file mode 100755
> index 0000000..5f35849
> --- /dev/null
> +++ b/drivers/staging/iio/light/tsl2x7x_core.c
> @@ -0,0 +1,2076 @@
> +/*
> + * Device driver for monitoring ambient light intensity in (lux)
> + * and proximity detection (prox) within the TAOS TSL2X7X family of devices.
> + *
> + * Copyright (c) 2012, TAOS Corporation.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
> + * more details.
> + *
> + * You should have received a copy of the GNU General Public License along
> + * with this program; if not, write to the Free Software Foundation, Inc.,
> + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
> + */
> +
> +#include<linux/kernel.h>
> +#include<linux/i2c.h>
> +#include<linux/errno.h>
> +#include<linux/delay.h>
> +#include<linux/mutex.h>
> +#include<linux/interrupt.h>
> +#include<linux/slab.h>
> +#include<linux/module.h>
> +#include<linux/version.h>
> +#include "tsl2x7x.h"
> +#include "../events.h"
> +#include "../iio.h"
> +#include "../sysfs.h"
> +
> +/* Cal defs*/
> +#define PROX_STAT_CAL 0
> +#define PROX_STAT_SAMP 1
> +#define MAX_SAMPLES_CAL 200
> +
> +/* TSL2X7X Device ID */
> +#define TRITON_ID 0x00
> +#define SWORDFISH_ID 0x30
> +#define HALIBUT_ID 0x20
> +
> +/* Lux calculation constants */
> +#define TSL2X7X_LUX_CALC_OVER_FLOW 65535
> +
> +/* TAOS Register definitions - note:
> + * depending on device, some of these register are not used and the
> + * register address is benign.
> + */
> +/* 2X7X register offsets */
> +#define TSL2X7X_MAX_CONFIG_REG 16
> +
> +/* Device Registers and Masks */
> +#define TSL2X7X_CNTRL 0x00
> +#define TSL2X7X_ALS_TIME 0X01
> +#define TSL2X7X_PRX_TIME 0x02
> +#define TSL2X7X_WAIT_TIME 0x03
> +#define TSL2X7X_ALS_MINTHRESHLO 0X04
> +#define TSL2X7X_ALS_MINTHRESHHI 0X05
> +#define TSL2X7X_ALS_MAXTHRESHLO 0X06
> +#define TSL2X7X_ALS_MAXTHRESHHI 0X07
> +#define TSL2X7X_PRX_MINTHRESHLO 0X08
> +#define TSL2X7X_PRX_MINTHRESHHI 0X09
> +#define TSL2X7X_PRX_MAXTHRESHLO 0X0A
> +#define TSL2X7X_PRX_MAXTHRESHHI 0X0B
> +#define TSL2X7X_PERSISTENCE 0x0C
> +#define TSL2X7X_PRX_CONFIG 0x0D
> +#define TSL2X7X_PRX_COUNT 0x0E
> +#define TSL2X7X_GAIN 0x0F
> +#define TSL2X7X_NOTUSED 0x10
> +#define TSL2X7X_REVID 0x11
> +#define TSL2X7X_CHIPID 0x12
> +#define TSL2X7X_STATUS 0x13
> +#define TSL2X7X_ALS_CHAN0LO 0x14
> +#define TSL2X7X_ALS_CHAN0HI 0x15
> +#define TSL2X7X_ALS_CHAN1LO 0x16
> +#define TSL2X7X_ALS_CHAN1HI 0x17
> +#define TSL2X7X_PRX_LO 0x18
> +#define TSL2X7X_PRX_HI 0x19
> +
> +/* tsl2X7X cmd reg masks */
> +#define TSL2X7X_CMD_REG 0x80
> +#define TSL2X7X_CMD_SPL_FN 0x60
> +
> +#define TSL2X7X_CMD_PROX_INT_CLR 0X05
> +#define TSL2X7X_CMD_ALS_INT_CLR 0x06
> +#define TSL2X7X_CMD_PROXALS_INT_CLR 0X07
> +
> +/* tsl2X7X cntrl reg masks */
> +#define TSL2X7X_CNTL_ADC_ENBL 0x02
> +#define TSL2X7X_CNTL_PWR_ON 0x01
> +
> +/* tsl2X7X status reg masks */
> +#define TSL2X7X_STA_ADC_VALID 0x01
> +#define TSL2X7X_STA_PRX_VALID 0x02
> +#define TSL2X7X_STA_ADC_PRX_VALID (TSL2X7X_STA_ADC_VALID |\
> + TSL2X7X_STA_PRX_VALID)
> +#define TSL2X7X_STA_ALS_INTR 0x10
> +#define TSL2X7X_STA_PRX_INTR 0x20
> +
> +/* 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
> +#define TSL2X7X_MAX_TIMER_CNT (0xFF)
> +
> +/*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
> +};
> +
> +struct tsl2x7x_parse_result {
> + int integer;
> + int fract;
> +};
> +
> +/* Per-device data */
> +struct tsl2x7x_als_info {
> + u16 als_ch0;
> + u16 als_ch1;
> + u16 lux;
> +};
> +
> +struct tsl2x7x_prox_stat {
> + int min;
> + int max;
> + int mean;
> + unsigned long stddev;
> +};
> +
> +struct tsl2x7x_chip_info {
> + int chan_table_elements;
> + struct iio_chan_spec channel[4];
> + const struct iio_info *info;
> +};
> +
> +struct tsl2X7X_chip {
> + kernel_ulong_t id;
> + struct mutex prox_mutex;
> + struct mutex als_mutex;
> + struct i2c_client *client;
> + u16 prox_data;
> + struct tsl2x7x_als_info als_cur_info;
> + struct tsl2x7x_settings tsl2x7x_settings;
> + struct tsl2X7X_platform_data *pdata;
> + int als_time_scale;
> + int als_saturation;
> + int tsl2x7x_chip_status;
> + u8 tsl2x7x_config[TSL2X7X_MAX_CONFIG_REG];
> + const struct tsl2x7x_chip_info *chip_info;
> + const struct iio_info *info;
> + s64 event_timestamp;
> + /* This structure is intentionally large to accommodate
> + * updates via sysfs. */
> + /* Sized to 9 = max 8 segments + 1 termination segment */
> + struct tsl2x7x_lux tsl2x7x_device_lux[TSL2X7X_MAX_LUX_TABLE_SIZE];
> +};
> +
> +/* Different devices require different coefficents */
> +static const struct tsl2x7x_lux tsl2x71_lux_table[] = {
> + { 14461, 611, 1211 },
> + { 18540, 352, 623 },
> + { 0, 0, 0 },
> +};
> +
> +static const struct tsl2x7x_lux tmd2x71_lux_table[] = {
> + { 11635, 115, 256 },
> + { 15536, 87, 179 },
> + { 0, 0, 0 },
> +};
> +
> +static const struct tsl2x7x_lux tsl2x72_lux_table[] = {
> + { 14013, 466, 917 },
> + { 18222, 310, 552 },
> + { 0, 0, 0 },
> +};
> +
> +static const struct tsl2x7x_lux tmd2x72_lux_table[] = {
> + { 13218, 130, 262 },
> + { 17592, 92, 169 },
> + { 0, 0, 0 },
> +};
> +
> +static const struct tsl2x7x_lux *tsl2x7x_default_lux_table_group[] = {
> + [tsl2571] = tsl2x71_lux_table,
> + [tsl2671] = tsl2x71_lux_table,
> + [tmd2671] = tmd2x71_lux_table,
> + [tsl2771] = tsl2x71_lux_table,
> + [tmd2771] = tmd2x71_lux_table,
> + [tsl2572] = tsl2x72_lux_table,
> + [tsl2672] = tsl2x72_lux_table,
> + [tmd2672] = tmd2x72_lux_table,
> + [tsl2772] = tsl2x72_lux_table,
> + [tmd2772] = tmd2x72_lux_table,
> +};
> +
> +static const struct tsl2x7x_settings tsl2x7x_default_settings = {
> + .als_time = 219, /* 101 ms */
> + .als_gain = 0,
> + .prx_time = 254, /* 5.4 ms */
> + .prox_gain = 1,
> + .wait_time = 245,
> + .prox_config = 0,
> + .als_gain_trim = 1000,
> + .als_cal_target = 150,
> + .als_thresh_low = 200,
> + .als_thresh_high = 256,
> + .persistence = 255,
> + .interrupts_en = 0,
> + .prox_thres_low = 0,
> + .prox_thres_high = 512,
> + .prox_max_samples_cal = 30,
> + .prox_pulse_count = 8
> +};
> +
> +static const s16 tsl2X7X_als_gainadj[] = {
> + 1,
> + 8,
> + 16,
> + 120
> +};
> +
> +static const s16 tsl2X7X_prx_gainadj[] = {
> + 1,
> + 2,
> + 4,
> + 8
> +};
> +
> +/* Channel variations */
> +enum {
> + ALS,
> + PRX,
> + ALSPRX,
> + PRX2,
> + ALSPRX2,
> +};
> +
> +const u8 device_channel_config[] = {
> + ALS,
> + PRX,
> + PRX,
> + ALSPRX,
> + ALSPRX,
> + ALS,
> + PRX2,
> + PRX2,
> + ALSPRX2,
> + ALSPRX2
> +};
> +
> +/**
> + * tsl2x7x_parse_buffer() - parse a decimal result from a buffer.
> + * @*buf: pointer to char buffer to parse
> + * @*result: pointer to buffer to contain
> + * resulting interger / decimal as ints.
> + *
> + */
> +static int
> +tsl2x7x_parse_buffer(const char *buf, struct tsl2x7x_parse_result *result)
> +{
> + int integer = 0, fract = 0, fract_mult = 100000;
> + bool integer_part = true, negative = false;
> +
> + if (buf[0] == '-') {
> + negative = true;
> + buf++;
> + }
> +
> + while (*buf) {
> + if ('0'<= *buf&& *buf<= '9') {
> + if (integer_part)
> + integer = integer*10 + *buf - '0';
> + else {
> + fract += fract_mult*(*buf - '0');
> + if (fract_mult == 1)
> + break;
> + fract_mult /= 10;
> + }
> + } else if (*buf == '\n') {
> + if (*(buf + 1) == '\0')
> + break;
> + else
> + return -EINVAL;
> + } else if (*buf == '.') {
> + integer_part = false;
> + } else {
> + return -EINVAL;
> + }
> + buf++;
> + }
> + if (negative) {
> + if (integer)
> + integer = -integer;
> + else
> + fract = -fract;
> + }
> +
> + result->integer = integer;
> + result->fract = fract;
> +
> + return 0;
> +}
> +
> +/**
> + * tsl2x7x_i2c_read() - Read a byte from a register.
> + * @client: i2c client
> + * @reg: device register to read from
> + * @*val: pointer to location to store register contents.
> + *
> + */
> +static int
> +tsl2x7x_i2c_read(struct i2c_client *client, u8 reg, u8 *val)
> +{
> + int ret = 0;
> +
> + /* select register to write */
> + ret = i2c_smbus_write_byte(client, (TSL2X7X_CMD_REG | reg));
> + if (ret< 0) {
> + dev_err(&client->dev, "%s: failed to write register %x\n"
> + , __func__, reg);
> + return ret;
> + }
> +
> + /* read the data */
> + ret = i2c_smbus_read_byte(client);
> + if (ret>= 0)
> + *val = (u8)ret;
> + else
> + dev_err(&client->dev, "%s: failed to read register %x\n"
> + , __func__, reg);
> +
> + return ret;
> +}
> +
> +/**
> + * tsl2x7x_get_lux() - Reads and calculates current lux value.
> + * @indio_dev: pointer to IIO device
> + *
> + * The raw ch0 and ch1 values of the ambient light sensed in the last
> + * integration cycle are read from the device.
> + * Time scale factor array values are adjusted based on the integration time.
> + * The raw values are multiplied by a scale factor, and device gain is obtained
> + * using gain index. Limit checks are done next, then the ratio of a multiple
> + * of ch1 value, to the ch0 value, is calculated. Array tsl2x7x_device_lux[]
> + * is then scanned to find the first ratio value that is just above the ratio
> + * we just calculated. The ch0 and ch1 multiplier constants in the array are
> + * then used along with the time scale factor array values, to calculate the
> + * lux.
> + */
> +static int tsl2x7x_get_lux(struct iio_dev *indio_dev)
> +{
> + u16 ch0, ch1; /* separated ch0/ch1 data from device */
> + u32 lux; /* raw lux calculated from device data */
> + u64 lux64;
> + u32 ratio;
> + u8 buf[4];
> + struct tsl2x7x_lux *p;
> + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
> + int i, ret;
> + u32 ch0lux = 0;
> + u32 ch1lux = 0;
> +
> + if (mutex_trylock(&chip->als_mutex) == 0)
> + return chip->als_cur_info.lux; /* busy, so return LAST VALUE */
> +
> + if (chip->tsl2x7x_chip_status != TSL2X7X_CHIP_WORKING) {
> + /* device is not enabled */
> + dev_err(&chip->client->dev, "%s: device is not enabled\n",
> + __func__);
> + ret = -EBUSY ;
> + goto out_unlock;
> + }
> +
> + ret = tsl2x7x_i2c_read(chip->client,
> + (TSL2X7X_CMD_REG | TSL2X7X_STATUS),&buf[0]);
> + if (ret< 0) {
> + dev_err(&chip->client->dev,
> + "%s: Failed to read STATUS Reg\n", __func__);
> + goto out_unlock;
> + }
> + /* is data new& valid */
> + if (!(buf[0]& TSL2X7X_STA_ADC_VALID)) {
> + dev_err(&chip->client->dev,
> + "%s: data not valid yet\n", __func__);
> + ret = chip->als_cur_info.lux; /* return LAST VALUE */
> + goto out_unlock;
> + }
> +
> + for (i = 0; i< 4; i++) {
> + ret = tsl2x7x_i2c_read(chip->client,
> + (TSL2X7X_CMD_REG | (TSL2X7X_ALS_CHAN0LO + i)),
> + &buf[i]);
> + if (ret< 0) {
> + dev_err(&chip->client->dev,
> + "%s: failed to read. err=%x\n", __func__, ret);
> + goto out_unlock;
> + }
> + }
> +
> + /* clear any existing interrupt status */
> + 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,
> + "%s: i2c_write_command failed - err = %d\n",
> + __func__, ret);
> + goto out_unlock; /* have no data, so return failure */
> + }
> +
> + /* extract ALS/lux data */
> + ch0 = le16_to_cpup((const __le16 *)&buf[0]);
> + ch1 = le16_to_cpup((const __le16 *)&buf[2]);
> +
> + chip->als_cur_info.als_ch0 = ch0;
> + chip->als_cur_info.als_ch1 = ch1;
> +
> + if ((ch0>= chip->als_saturation) || (ch1>= chip->als_saturation)) {
> + lux = TSL2X7X_LUX_CALC_OVER_FLOW;
> + goto return_max;
> + }
> +
> + if (ch0 == 0) {
> + /* have no data, so return LAST VALUE */
> + ret = chip->als_cur_info.lux;
> + goto out_unlock;
> + }
> + /* calculate ratio */
> + ratio = (ch1<< 15) / ch0;
> + /* convert to unscaled lux using the pointer to the table */
> + p = (struct tsl2x7x_lux *) chip->tsl2x7x_device_lux;
> + while (p->ratio != 0&& p->ratio< ratio)
> + p++;
> +
> + if (p->ratio == 0) {
> + lux = 0;
> + } else {
> + ch0lux = DIV_ROUND_UP((ch0 * p->ch0),
> + tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]);
> + ch1lux = DIV_ROUND_UP((ch1 * p->ch1),
> + tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain]);
> + lux = ch0lux - ch1lux;
> + }
> +
> + /* note: lux is 31 bit max at this point */
> + if (ch1lux> ch0lux) {
> + dev_dbg(&chip->client->dev, "ch1lux> ch0lux-return last value\n");
> + ret = chip->als_cur_info.lux;
> + goto out_unlock;
> + }
> +
> + /* adjust for active time scale */
> + if (chip->als_time_scale == 0)
> + lux = 0;
> + else
> + lux = (lux + (chip->als_time_scale>> 1)) /
> + chip->als_time_scale;
> +
> + /* adjust for active gain scale
> + * The tsl2x7x_device_lux tables have a factor of 256 built-in.
> + * User-specified gain provides a multiplier.
> + * Apply user-specified gain before shifting right to retain precision.
> + * Use 64 bits to avoid overflow on multiplication.
> + * Then go back to 32 bits before division to avoid using div_u64().
> + */
> +
> + lux64 = lux;
> + lux64 = lux64 * chip->tsl2x7x_settings.als_gain_trim;
> + lux64>>= 8;
> + lux = lux64;
> + lux = (lux + 500) / 1000;
> +
> + if (lux> TSL2X7X_LUX_CALC_OVER_FLOW) /* check for overflow */
> + lux = TSL2X7X_LUX_CALC_OVER_FLOW;
> +
> + /* Update the structure with the latest lux. */
> +return_max:
> + chip->als_cur_info.lux = lux;
> + ret = lux;
> +
> +out_unlock:
> + mutex_unlock(&chip->als_mutex);
> +
> + return ret;
> +}
> +
> +/**
> + * tsl2x7x_get_prox() - Reads proximity data registers and updates
> + * chip->prox_data.
> + *
> + * @indio_dev: pointer to IIO device
> + */
> +static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
> +{
> + int i;
> + int ret;
> + u8 status;
> + u8 chdata[2];
> + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
> +
> + if (mutex_trylock(&chip->prox_mutex) == 0) {
> + dev_err(&chip->client->dev,
> + "%s: Can't get prox mutex\n", __func__);
> + return -EBUSY;
> + }
> +
> + ret = tsl2x7x_i2c_read(chip->client,
> + (TSL2X7X_CMD_REG | TSL2X7X_STATUS),&status);
> + if (ret< 0) {
> + dev_err(&chip->client->dev,
> + "%s: i2c err=%d\n", __func__, ret);
> + goto prox_poll_err;
> + }
> +
> + switch (chip->id) {
> + case tsl2571:
> + case tsl2671:
> + case tmd2671:
> + case tsl2771:
> + case tmd2771:
> + if (!(status& TSL2X7X_STA_ADC_VALID))
> + goto prox_poll_err;
> + break;
> + case tsl2572:
> + case tsl2672:
> + case tmd2672:
> + case tsl2772:
> + case tmd2772:
> + if (!(status& TSL2X7X_STA_PRX_VALID))
> + goto prox_poll_err;
> + break;
> + }
> +
> + for (i = 0; i< 2; i++) {
> + ret = tsl2x7x_i2c_read(chip->client,
> + (TSL2X7X_CMD_REG |
> + (TSL2X7X_PRX_LO + i)),&chdata[i]);
> + if (ret< 0)
> + goto prox_poll_err;
> + }
> +
> + chip->prox_data =
> + le16_to_cpup((const __le16 *)&chdata[0]);
> +
> +prox_poll_err:
> +
> + mutex_unlock(&chip->prox_mutex);
> +
> + return chip->prox_data;
> +}
> +
> +/**
> + * tsl2x7x_defaults() - Populates the device nominal operating parameters
> + * with those provided by a 'platform' data struct or
> + * with prefined defaults.
> + *
> + * @chip: pointer to device structure.
> + */
> +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);
> +}
> +
> +/**
> + * tsl2x7x_als_calibrate() - Obtain single reading and calculate
> + * the als_gain_trim.
> + *
> + * @indio_dev: pointer to IIO device
> + */
> +static int tsl2x7x_als_calibrate(struct iio_dev *indio_dev)
> +{
> + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
> + u8 reg_val;
> + int gain_trim_val;
> + int ret;
> + int lux_val;
> +
> + ret = i2c_smbus_write_byte(chip->client,
> + (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
> + if (ret< 0) {
> + dev_err(&chip->client->dev,
> + "%s: failed to write CNTRL register, ret=%d\n",
> + __func__, ret);
> + return ret;
> + }
> +
> + reg_val = i2c_smbus_read_byte(chip->client);
> + if ((reg_val& (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON))
> + != (TSL2X7X_CNTL_ADC_ENBL | TSL2X7X_CNTL_PWR_ON)) {
> + dev_err(&chip->client->dev,
> + "%s: failed: ADC not enabled\n", __func__);
> + return -1;
> + }
> +
> + ret = i2c_smbus_write_byte(chip->client,
> + (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
> + if (ret< 0) {
> + dev_err(&chip->client->dev,
> + "%s: failed to write ctrl reg: ret=%d\n",
> + __func__, ret);
> + return ret;
> + }
> +
> + reg_val = i2c_smbus_read_byte(chip->client);
> + if ((reg_val& TSL2X7X_STA_ADC_VALID) != TSL2X7X_STA_ADC_VALID) {
> + dev_err(&chip->client->dev,
> + "%s: failed: STATUS - ADC not valid.\n", __func__);
> + return -ENODATA;
> + }
> +
> + lux_val = tsl2x7x_get_lux(indio_dev);
> + if (lux_val< 0) {
> + dev_err(&chip->client->dev,
> + "%s: failed to get lux\n", __func__);
> + return lux_val;
> + }
> +
> + gain_trim_val = (((chip->tsl2x7x_settings.als_cal_target)
> + * chip->tsl2x7x_settings.als_gain_trim) / lux_val);
> + if ((gain_trim_val< 250) || (gain_trim_val> 4000))
> + return -ERANGE;
> +
> + chip->tsl2x7x_settings.als_gain_trim = gain_trim_val;
> + dev_info(&chip->client->dev,
> + "%s als_calibrate completed\n", chip->client->name);
> +
> + return (int) gain_trim_val;
> +}
> +
> +static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
> +{
> + int i;
> + int ret = 0;
> + u8 *dev_reg;
> + u8 utmp;
> + int als_count;
> + int als_time;
> + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
> + u8 reg_val = 0;
> +
> + if (chip->pdata&& chip->pdata->power_on)
> + chip->pdata->power_on(indio_dev);
> +
> + /* Non calculated parameters */
> + chip->tsl2x7x_config[TSL2X7X_PRX_TIME] =
> + chip->tsl2x7x_settings.prx_time;
> + chip->tsl2x7x_config[TSL2X7X_WAIT_TIME] =
> + chip->tsl2x7x_settings.wait_time;
> + chip->tsl2x7x_config[TSL2X7X_PRX_CONFIG] =
> + chip->tsl2x7x_settings.prox_config;
> +
> + chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHLO] =
> + (chip->tsl2x7x_settings.als_thresh_low)& 0xFF;
> + chip->tsl2x7x_config[TSL2X7X_ALS_MINTHRESHHI] =
> + (chip->tsl2x7x_settings.als_thresh_low>> 8)& 0xFF;
> + chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHLO] =
> + (chip->tsl2x7x_settings.als_thresh_high)& 0xFF;
> + chip->tsl2x7x_config[TSL2X7X_ALS_MAXTHRESHHI] =
> + (chip->tsl2x7x_settings.als_thresh_high>> 8)& 0xFF;
> + chip->tsl2x7x_config[TSL2X7X_PERSISTENCE] =
> + chip->tsl2x7x_settings.persistence;
> +
> + chip->tsl2x7x_config[TSL2X7X_PRX_COUNT] =
> + chip->tsl2x7x_settings.prox_pulse_count;
> + chip->tsl2x7x_config[TSL2X7X_PRX_MINTHRESHLO] =
> + chip->tsl2x7x_settings.prox_thres_low;
> + chip->tsl2x7x_config[TSL2X7X_PRX_MAXTHRESHLO] =
> + chip->tsl2x7x_settings.prox_thres_high;
> +
> + /* and make sure we're not already on */
> + if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
> + /* if forcing a register update - turn off, then on */
> + dev_info(&chip->client->dev, "device is already enabled\n");
> + return -EINVAL;
> + }
> +
> + /* determine als integration regster */
> + als_count = (chip->tsl2x7x_settings.als_time * 100 + 135) / 270;
> + if (als_count == 0)
> + als_count = 1; /* ensure at least one cycle */
> +
> + /* convert back to time (encompasses overrides) */
> + als_time = (als_count * 27 + 5) / 10;
> + chip->tsl2x7x_config[TSL2X7X_ALS_TIME] = 256 - als_count;
> +
> + /* Set the gain based on tsl2x7x_settings struct */
> + chip->tsl2x7x_config[TSL2X7X_GAIN] =
> + (chip->tsl2x7x_settings.als_gain |
> + (TSL2X7X_mA100 | TSL2X7X_DIODE1)
> + | ((chip->tsl2x7x_settings.prox_gain)<< 2));
> +
> + /* set chip struct re scaling and saturation */
> + chip->als_saturation = als_count * 922; /* 90% of full scale */
> + chip->als_time_scale = (als_time + 25) / 50;
> +
> + /* TSL2X7X Specific power-on / adc enable sequence
> + * Power on the device 1st. */
> + utmp = TSL2X7X_CNTL_PWR_ON;
> + ret = i2c_smbus_write_byte_data(chip->client,
> + TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
> + if (ret< 0) {
> + dev_err(&chip->client->dev,
> + "%s: failed on CNTRL reg.\n", __func__);
> + return ret;
> + }
> +
> + /* Use the following shadow copy for our delay before enabling ADC.
> + * Write all the registers. */
> + for (i = 0, dev_reg = chip->tsl2x7x_config;
> + i< TSL2X7X_MAX_CONFIG_REG; i++) {
> + ret = i2c_smbus_write_byte_data(chip->client,
> + TSL2X7X_CMD_REG + i, *dev_reg++);
> + if (ret< 0) {
> + dev_err(&chip->client->dev,
> + "%s: failed on write to reg %d.\n", __func__, i);
> + return ret;
> + }
> + }
> +
> + udelay(3000); /* Power-on settling time */
> +
> + /* NOW enable the ADC
> + * initialize the desired mode of operation */
> + utmp = TSL2X7X_CNTL_PWR_ON |
> + TSL2X7X_CNTL_ADC_ENBL |
> + TSL2X7X_CNTL_PROX_DET_ENBL;
> + ret = i2c_smbus_write_byte_data(chip->client,
> + TSL2X7X_CMD_REG | TSL2X7X_CNTRL, utmp);
> + if (ret< 0) {
> + dev_err(&chip->client->dev,
> + "%s: failed on 2nd CTRL reg.\n", __func__);
> + return ret;
> + }
> +
> + chip->tsl2x7x_chip_status = TSL2X7X_CHIP_WORKING;
> +
> + if (chip->tsl2x7x_settings.interrupts_en != 0) {
> + dev_info(&chip->client->dev, "Setting Up Interrupt(s)\n");
> +
> + reg_val = TSL2X7X_CNTL_PWR_ON | TSL2X7X_CNTL_ADC_ENBL;
> + if ((chip->tsl2x7x_settings.interrupts_en == 0x20) ||
> + (chip->tsl2x7x_settings.interrupts_en == 0x30))
> + reg_val |= TSL2X7X_CNTL_PROX_DET_ENBL;
> +
> + reg_val |= chip->tsl2x7x_settings.interrupts_en;
> + ret = i2c_smbus_write_byte_data(chip->client,
> + (TSL2X7X_CMD_REG | TSL2X7X_CNTRL), reg_val);
> + if (ret< 0)
> + dev_err(&chip->client->dev,
> + "%s: failed in tsl2x7x_IOCTL_INT_SET.\n",
> + __func__);
> +
> + /* Clear out any initial interrupts */
> + ret = i2c_smbus_write_byte(chip->client,
> + TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
> + TSL2X7X_CMD_PROXALS_INT_CLR);
> + if (ret< 0) {
> + dev_err(&chip->client->dev,
> + "%s: Failed to clear Int status\n",
> + __func__);
> + return ret;
> + }
> + }
> +
> + return ret;
> +}
> +
> +static int tsl2x7x_chip_off(struct iio_dev *indio_dev)
> +{
> + int ret;
> + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
> +
> + /* turn device off */
> + chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
> +
> + ret = i2c_smbus_write_byte_data(chip->client,
> + TSL2X7X_CMD_REG | TSL2X7X_CNTRL, 0x00);
> +
> + if (chip->pdata&& chip->pdata->power_off)
> + chip->pdata->power_off(chip->client);
> +
> + return ret;
> +}
> +
> +/**
> + * tsl2x7x_invoke_change
> + * @indio_dev: pointer to IIO device
> + *
> + * Obtain and lock both ALS and PROX resources,
> + * determine and save device state (On/Off),
> + * cycle device to implement updated parameter,
> + * put device back into proper state, and unlock
> + * resource.
> + */
> +int tsl2x7x_invoke_change(struct iio_dev *indio_dev)
> +{
> + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
> + int device_status = chip->tsl2x7x_chip_status;
> +
> + mutex_lock(&chip->als_mutex);
> + mutex_lock(&chip->prox_mutex);
> +
> + if (device_status == TSL2X7X_CHIP_WORKING)
> + tsl2x7x_chip_off(indio_dev);
> +
> + tsl2x7x_chip_on(indio_dev);
> +
> + if (device_status != TSL2X7X_CHIP_WORKING)
> + tsl2x7x_chip_off(indio_dev);
> +
> + mutex_unlock(&chip->prox_mutex);
> + mutex_unlock(&chip->als_mutex);
> +
> + return 0;
> +}
> +
> +static
> +void tsl2x7x_prox_calculate(int *data, int length,
> + struct tsl2x7x_prox_stat *statP)
> +{
> + int i;
> + int sample_sum;
> + int tmp;
> +
> + if (length == 0)
> + length = 1;
> +
> + sample_sum = 0;
> + statP->min = INT_MAX;
> + statP->max = INT_MIN;
> + for (i = 0; i< length; i++) {
> + sample_sum += data[i];
> + statP->min = min(statP->min, data[i]);
> + statP->max = max(statP->max, data[i]);
> + }
> +
> + statP->mean = sample_sum / length;
> + sample_sum = 0;
> + for (i = 0; i< length; i++) {
> + tmp = data[i] - statP->mean;
> + sample_sum += tmp * tmp;
> + }
> + statP->stddev = int_sqrt((long)sample_sum)/length;
> +}
> +
> +/**
> + * tsl2x7x_prox_cal() - Calculates std. and sets thresholds.
> + * @indio_dev: pointer to IIO device
> + *
> + * Calculates a standard deviation based on the samples,
> + * and sets the threshold accordingly.
> + */
> +static void tsl2x7x_prox_cal(struct iio_dev *indio_dev)
> +{
> + int prox_history[MAX_SAMPLES_CAL + 1];
> + int i;
> + struct tsl2x7x_prox_stat prox_stat_data[2];
> + struct tsl2x7x_prox_stat *calP;
> + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
> + u8 tmp_irq_settings;
> + u8 current_state = chip->tsl2x7x_chip_status;
> +
> + if (chip->tsl2x7x_settings.prox_max_samples_cal> MAX_SAMPLES_CAL) {
> + dev_err(&chip->client->dev,
> + "%s: max prox samples cal is too big: %d\n",
> + __func__, chip->tsl2x7x_settings.prox_max_samples_cal);
> + chip->tsl2x7x_settings.prox_max_samples_cal = MAX_SAMPLES_CAL;
> + }
> +
> + /* have to stop to change settings */
> + tsl2x7x_chip_off(indio_dev);
> +
> + /* Enable proximity detection save just in case prox not wanted yet*/
> + tmp_irq_settings = chip->tsl2x7x_settings.interrupts_en;
> + chip->tsl2x7x_settings.interrupts_en |= TSL2X7X_CNTL_PROX_INT_ENBL;
> +
> + /*turn on device if not already on*/
> + tsl2x7x_chip_on(indio_dev);
> +
> + /*gather the samples*/
> + for (i = 0; i< chip->tsl2x7x_settings.prox_max_samples_cal; i++) {
> + mdelay(15);
> + tsl2x7x_get_prox(indio_dev);
> + prox_history[i] = chip->prox_data;
> + dev_info(&chip->client->dev, "2 i=%d prox data= %d\n",
> + i, chip->prox_data);
> + }
> +
> + tsl2x7x_chip_off(indio_dev);
> + calP =&prox_stat_data[PROX_STAT_CAL];
> + tsl2x7x_prox_calculate(prox_history,
> + chip->tsl2x7x_settings.prox_max_samples_cal, calP);
> + chip->tsl2x7x_settings.prox_thres_high = (calP->max<< 1) - calP->mean;
> +
> + dev_info(&chip->client->dev, " cal min=%d mean=%d max=%d\n",
> + calP->min, calP->mean, calP->max);
> + dev_info(&chip->client->dev,
> + "%s proximity threshold set to %d\n",
> + chip->client->name, chip->tsl2x7x_settings.prox_thres_high);
> +
> + /* back to the way they were */
> + chip->tsl2x7x_settings.interrupts_en = tmp_irq_settings;
> + if (current_state == TSL2X7X_CHIP_WORKING)
> + tsl2x7x_chip_on(indio_dev);
> +}
> +
> +static ssize_t tsl2x7x_power_state_show(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(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_on(indio_dev);
> + else
> + tsl2x7x_chip_off(indio_dev);
> +
> + return len;
> +}
> +
> +static ssize_t tsl2x7x_gain_available_show(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev));
> +
> + switch (chip->id) {
> + case tsl2571:
> + case tsl2671:
> + case tmd2671:
> + case tsl2771:
> + case tmd2771:
> + return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 128");
> + break;
> + }
> +
> + 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 tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev));
> + int y, z;
> +
> + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
> + z = y * 2.72;
> + y /= 1000;
> + z %= 1000;
> +
> + return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
> +}
> +
> +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(dev_get_drvdata(dev));
> + struct tsl2x7x_parse_result result;
> +
> + result.integer = 0;
> + result.fract = 0;
> +
> + tsl2x7x_parse_buffer(buf,&result);
> +
> + result.fract /= 1000;
> + result.fract /= 3;
> + chip->tsl2x7x_settings.als_time =
> + (TSL2X7X_MAX_TIMER_CNT - (u8)result.fract);
> +
> + dev_info(&chip->client->dev, "%s: als time = %d",
> + __func__, chip->tsl2x7x_settings.als_time);
> +
> + tsl2x7x_invoke_change(indio_dev);
> +
> + return IIO_VAL_INT_PLUS_MICRO;
> +}
> +
> +static IIO_CONST_ATTR(in_illuminance0_integration_time_available,
> + ".00272 - .696");
> +
> +static ssize_t tsl2x7x_als_cal_target_show(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(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(dev_get_drvdata(dev));
> + unsigned long value;
> +
> + if (kstrtoul(buf, 0,&value))
> + return -EINVAL;
> +
> + if (value)
> + chip->tsl2x7x_settings.als_cal_target = value;
> +
> + tsl2x7x_invoke_change(indio_dev);
> +
> + return len;
> +}
> +
> +/* persistence settings */
> +static ssize_t tsl2x7x_als_persistence_show(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev));
> + int y, z, filter_delay;
> +
> + /* Determine integration time */
> + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
> + z = y * 2.72;
> + filter_delay = z * (chip->tsl2x7x_settings.persistence& 0x0F);
> + y = (filter_delay / 1000);
> + z = (filter_delay % 1000);
> +
> + return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
> +}
> +
> +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(dev_get_drvdata(dev));
> + struct tsl2x7x_parse_result result;
> + int y, z, filter_delay;
> +
> + result.integer = 0;
> + result.fract = 0;
> + tsl2x7x_parse_buffer(buf,&result);
> +
> + result.fract /= 1000;
> + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
> + z = y * 2.72;
> +
> + filter_delay =
> + DIV_ROUND_UP(((result.integer * 1000) + result.fract), z);
> +
> + chip->tsl2x7x_settings.persistence&= 0xF0;
> + chip->tsl2x7x_settings.persistence |= (filter_delay& 0x0F);
> +
> + dev_info(&chip->client->dev, "%s: als persistence = %d",
> + __func__, filter_delay);
> +
> + tsl2x7x_invoke_change(indio_dev);
> +
> + return IIO_VAL_INT_PLUS_MICRO;
> +}
> +
> +static ssize_t tsl2x7x_prox_persistence_show(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev));
> + int y, z, filter_delay;
> +
> + /* Determine integration time */
> + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1;
> + z = y * 2.72;
> + filter_delay = z * ((chip->tsl2x7x_settings.persistence& 0xF0)>> 4);
> + y = (filter_delay / 1000);
> + z = (filter_delay % 1000);
> +
> + return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
> +}
> +
> +static ssize_t tsl2x7x_prox_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(dev_get_drvdata(dev));
> + struct tsl2x7x_parse_result result;
> + int y, z, filter_delay;
> +
> + result.integer = 0;
> + result.fract = 0;
> + tsl2x7x_parse_buffer(buf,&result);
> +
> + result.fract /= 1000;
> + y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.prx_time) + 1;
> + z = y * 2.72;
> +
> + filter_delay =
> + DIV_ROUND_UP(((result.integer * 1000) + result.fract), z);
> +
> + chip->tsl2x7x_settings.persistence&= 0x0F;
> + chip->tsl2x7x_settings.persistence |= ((filter_delay<< 4)& 0xF0);
> +
> + dev_info(&chip->client->dev, "%s: prox persistence = %d",
> + __func__, filter_delay);
> +
> + tsl2x7x_invoke_change(indio_dev);
> +
> + return IIO_VAL_INT_PLUS_MICRO;
> +}
> +
Bonus white line.
> +
> +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);
> +
> + tsl2x7x_invoke_change(indio_dev);
> +
> + return len;
> +}
> +
> +static ssize_t tsl2x7x_luxtable_show(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(dev));
> + int i = 0;
> + int offset = 0;
> +
> + while (i< (TSL2X7X_MAX_LUX_TABLE_SIZE * 3)) {
> + offset += snprintf(buf + offset, PAGE_SIZE, "%d,%d,%d,",
> + chip->tsl2x7x_device_lux[i].ratio,
> + chip->tsl2x7x_device_lux[i].ch0,
> + chip->tsl2x7x_device_lux[i].ch1);
> + if (chip->tsl2x7x_device_lux[i].ratio == 0) {
> + /* We just printed the first "0" entry.
> + * Now get rid of the extra "," and break. */
> + offset--;
> + break;
> + }
> + i++;
> + }
> +
> + offset += snprintf(buf + offset, PAGE_SIZE, "\n");
> + return offset;
> +}
> +
> +static ssize_t tsl2x7x_luxtable_store(struct device *dev,
> + struct device_attribute *attr, const char *buf, size_t len)
> +{
> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> + struct tsl2X7X_chip *chip = iio_priv(dev_get_drvdata(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));
> +
> + tsl2x7x_invoke_change(indio_dev);
> +
> + 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);
> +
> + tsl2x7x_invoke_change(indio_dev);
> +
> + return len;
> +}
> +
> +static int tsl2x7x_read_interrupt_config(struct iio_dev *indio_dev,
> + u64 event_code)
> +{
> + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
> + int ret;
> +
> + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY)
> + ret = !!(chip->tsl2x7x_settings.interrupts_en& 0x10);
> + else
> + ret = !!(chip->tsl2x7x_settings.interrupts_en& 0x20);
> +
> + return ret;
> +}
> +
> +static int tsl2x7x_write_interrupt_config(struct iio_dev *indio_dev,
> + u64 event_code,
> + int val)
> +{
> + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
> +
Several bonus white lines.
> +
> +
> + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) {
> + if (val)
> + chip->tsl2x7x_settings.interrupts_en |= 0x10;
> + else
> + chip->tsl2x7x_settings.interrupts_en&= 0x20;
> + } else {
> + if (val)
> + chip->tsl2x7x_settings.interrupts_en |= 0x20;
> + else
> + chip->tsl2x7x_settings.interrupts_en&= 0x10;
> + }
> +
> + tsl2x7x_invoke_change(indio_dev);
> +
> + 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);
> +
One bonus line.
> +
> + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) {
> + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
> + case IIO_EV_DIR_RISING:
> + chip->tsl2x7x_settings.als_thresh_high = val;
> + break;
> + case IIO_EV_DIR_FALLING:
> + chip->tsl2x7x_settings.als_thresh_low = val;
> + break;
> + default:
> + return -EINVAL;
> + }
> + } else {
> + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
> + case IIO_EV_DIR_RISING:
> + chip->tsl2x7x_settings.prox_thres_high = val;
> + break;
> + case IIO_EV_DIR_FALLING:
> + chip->tsl2x7x_settings.prox_thres_low = val;
> + break;
> + default:
> + return -EINVAL;
> + }
> + }
> +
> + tsl2x7x_invoke_change(indio_dev);
> +
> + return 0;
> +}
> +
> +static int tsl2x7x_read_thresh(struct iio_dev *indio_dev,
> + u64 event_code,
> + int *val)
> +{
> + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
> +
> + if (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code) == IIO_INTENSITY) {
> + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
> + case IIO_EV_DIR_RISING:
> + *val = chip->tsl2x7x_settings.als_thresh_high;
> + break;
> + case IIO_EV_DIR_FALLING:
> + *val = chip->tsl2x7x_settings.als_thresh_low;
> + break;
> + default:
> + return -EINVAL;
> + }
> + } else {
> + switch (IIO_EVENT_CODE_EXTRACT_DIR(event_code)) {
> + case IIO_EV_DIR_RISING:
> + *val = chip->tsl2x7x_settings.prox_thres_high;
> + break;
> + case IIO_EV_DIR_FALLING:
> + *val = chip->tsl2x7x_settings.prox_thres_low;
> + break;
> + default:
> + return -EINVAL;
> + }
> + }
> +
> + return 0;
> +}
> +
> +static int tsl2x7x_read_raw(struct iio_dev *indio_dev,
> + struct iio_chan_spec const *chan,
> + int *val,
> + int *val2,
> + long mask)
> +{
> + int ret = -EINVAL;
> + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
> +
> + switch (mask) {
> + case IIO_CHAN_INFO_RAW:
> + switch (chan->type) {
> + case IIO_LIGHT:
> + tsl2x7x_get_lux(indio_dev);
> + *val = chip->als_cur_info.lux;
> + ret = IIO_VAL_INT;
> + break;
> + case IIO_INTENSITY:
> + tsl2x7x_get_lux(indio_dev);
> + if (chan->channel == 0)
> + *val = chip->als_cur_info.als_ch0;
> + else
> + *val = chip->als_cur_info.als_ch1;
> + ret = IIO_VAL_INT;
> + break;
> + case IIO_PROXIMITY:
> + tsl2x7x_get_prox(indio_dev);
> + *val = chip->prox_data;
> + ret = IIO_VAL_INT;
> + break;
> + default:
> + return -EINVAL;
> + break;
> + }
> + break;
> + case IIO_CHAN_INFO_CALIBSCALE:
> + if (chan->type == IIO_LIGHT)
> + *val =
> + tsl2X7X_als_gainadj[chip->tsl2x7x_settings.als_gain];
> + else
> + *val =
> + tsl2X7X_prx_gainadj[chip->tsl2x7x_settings.prox_gain];
> + ret = IIO_VAL_INT;
> + break;
> + case IIO_CHAN_INFO_CALIBBIAS:
> + *val = chip->tsl2x7x_settings.als_gain_trim;
> + ret = IIO_VAL_INT;
> + break;
> +
> + default:
> + ret = -EINVAL;
> + }
> +
> + return ret;
> +}
> +
> +static int tsl2x7x_write_raw(struct iio_dev *indio_dev,
> + struct iio_chan_spec const *chan,
> + int val,
> + int val2,
> + long mask)
> +{
> + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
> +
> + switch (mask) {
> + case IIO_CHAN_INFO_CALIBSCALE:
> + if (chan->type == IIO_INTENSITY) {
> + switch (val) {
> + case 1:
> + chip->tsl2x7x_settings.als_gain = 0;
> + break;
> + case 8:
> + chip->tsl2x7x_settings.als_gain = 1;
> + break;
> + case 16:
> + chip->tsl2x7x_settings.als_gain = 2;
> + break;
> + case 120:
> + switch (chip->id) {
> + case tsl2572:
> + case tsl2672:
> + case tmd2672:
> + case tsl2772:
> + case tmd2772:
> + return -EINVAL;
> + break;
> + }
> + chip->tsl2x7x_settings.als_gain = 3;
> + break;
> + case 128:
> + switch (chip->id) {
> + case tsl2571:
> + case tsl2671:
> + case tmd2671:
> + case tsl2771:
> + case tmd2771:
> + return -EINVAL;
> + break;
> + }
> + 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;
> + }
> +
> + tsl2x7x_invoke_change(indio_dev);
> +
> + return 0;
> +}
> +
> +static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR,
> + tsl2x7x_power_state_show, tsl2x7x_power_state_store);
> +
> +static DEVICE_ATTR(in_proximity0_calibscale_available, S_IRUGO,
> + tsl2x7x_prox_gain_available_show, NULL);
> +
> +static DEVICE_ATTR(in_illuminance0_calibscale_available, S_IRUGO,
> + tsl2x7x_gain_available_show, NULL);
> +
> +static DEVICE_ATTR(in_illuminance0_integration_time, S_IRUGO | S_IWUSR,
> + tsl2x7x_als_time_show, tsl2x7x_als_time_store);
> +
> +static DEVICE_ATTR(in_illuminance0_target_input, S_IRUGO | S_IWUSR,
> + tsl2x7x_als_cal_target_show, tsl2x7x_als_cal_target_store);
> +
> +static DEVICE_ATTR(in_illuminance0_calibrate, S_IWUSR, NULL,
> + tsl2x7x_do_calibrate);
> +
> +static DEVICE_ATTR(in_proximity0_calibrate, S_IWUSR, NULL,
> + tsl2x7x_do_prox_calibrate);
> +
> +static DEVICE_ATTR(in_illuminance0_lux_table, S_IRUGO | S_IWUSR,
> + tsl2x7x_luxtable_show, tsl2x7x_luxtable_store);
> +
> +static DEVICE_ATTR(in_intensity0_thresh_period, S_IRUGO | S_IWUSR,
> + tsl2x7x_als_persistence_show, tsl2x7x_als_persistence_store);
> +
> +static DEVICE_ATTR(in_proximity0_thresh_period, S_IRUGO | S_IWUSR,
> + tsl2x7x_prox_persistence_show, tsl2x7x_prox_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;
> +}
> +
> +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;
> + u8 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_get_prox(indio_dev); /* freshen data for ABI */
> + 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); /* freshen data for ABI */
> + iio_push_event(indio_dev,
> + IIO_UNMOD_EVENT_CODE(IIO_LIGHT,
> + 0,
> + IIO_EV_TYPE_THRESH,
> + IIO_EV_DIR_EITHER),
> + timestamp);
> + }
> + /* Clear interrupt now that we have handled it. */
> + ret = i2c_smbus_write_byte(chip->client,
> + TSL2X7X_CMD_REG | TSL2X7X_CMD_SPL_FN |
> + TSL2X7X_CMD_PROXALS_INT_CLR);
> + if (ret< 0)
> + dev_err(&chip->client->dev,
> + "%s: Failed to clear irq from event handler. err = %d\n",
> + __func__, ret);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static struct attribute *tsl2x7x_ALS_device_attrs[] = {
> + &dev_attr_power_state.attr,
> + &dev_attr_in_illuminance0_calibscale_available.attr,
> + &dev_attr_in_illuminance0_integration_time.attr,
> + &iio_const_attr_in_illuminance0_integration_time_available\
> + .dev_attr.attr,
> + &dev_attr_in_illuminance0_target_input.attr,
> + &dev_attr_in_illuminance0_calibrate.attr,
> + &dev_attr_in_illuminance0_lux_table.attr,
> + NULL
> +};
> +
> +static struct attribute *tsl2x7x_PRX_device_attrs[] = {
> + &dev_attr_power_state.attr,
> + &dev_attr_in_proximity0_calibrate.attr,
> + NULL
> +};
> +
> +static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = {
> + &dev_attr_power_state.attr,
> + &dev_attr_in_illuminance0_calibscale_available.attr,
> + &dev_attr_in_illuminance0_integration_time.attr,
> + &iio_const_attr_in_illuminance0_integration_time_available\
> + .dev_attr.attr,
> + &dev_attr_in_illuminance0_target_input.attr,
> + &dev_attr_in_illuminance0_calibrate.attr,
> + &dev_attr_in_illuminance0_lux_table.attr,
> + &dev_attr_in_proximity0_calibrate.attr,
> + NULL
> +};
> +
> +static struct attribute *tsl2x7x_PRX2_device_attrs[] = {
> + &dev_attr_power_state.attr,
> + &dev_attr_in_proximity0_calibrate.attr,
> + &dev_attr_in_proximity0_calibscale_available.attr,
> + NULL
> +};
> +
> +static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] = {
> + &dev_attr_power_state.attr,
> + &dev_attr_in_illuminance0_calibscale_available.attr,
> + &dev_attr_in_illuminance0_integration_time.attr,
> + &iio_const_attr_in_illuminance0_integration_time_available\
> + .dev_attr.attr,
> + &dev_attr_in_illuminance0_target_input.attr,
> + &dev_attr_in_illuminance0_calibrate.attr,
> + &dev_attr_in_illuminance0_lux_table.attr,
> + &dev_attr_in_proximity0_calibrate.attr,
> + &dev_attr_in_proximity0_calibscale_available.attr,
> + NULL
> +};
> +
> +static struct attribute *tsl2X7X_ALS_event_attrs[] = {
> + &dev_attr_in_intensity0_thresh_period.attr,
> + NULL,
> +};
> +static struct attribute *tsl2X7X_PRX_event_attrs[] = {
> + &dev_attr_in_proximity0_thresh_period.attr,
> + NULL,
> +};
> +
> +static struct attribute *tsl2X7X_ALSPRX_event_attrs[] = {
> + &dev_attr_in_intensity0_thresh_period.attr,
> + &dev_attr_in_proximity0_thresh_period.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 struct attribute_group tsl2X7X_event_attr_group_tbl[] = {
> + [ALS] = {
> + .attrs = tsl2X7X_ALS_event_attrs,
> + .name = "events",
Not sure we take any notice of the group name any more. Doesn't do
any harm though!
> + },
> + [PRX] = {
> + .attrs = tsl2X7X_PRX_event_attrs,
> + .name = "events",
> + },
> + [ALSPRX] = {
> + .attrs = tsl2X7X_ALSPRX_event_attrs,
> + .name = "events",
> + },
> +};
> +
> +static const struct iio_info tsl2X7X_device_info[] = {
> + [ALS] = {
> + .attrs =&tsl2X7X_device_attr_group_tbl[ALS],
> + .event_attrs =&tsl2X7X_event_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],
> + .event_attrs =&tsl2X7X_event_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],
> + .event_attrs =&tsl2X7X_event_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],
> + .event_attrs =&tsl2X7X_event_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,
> + },
> + [ALSPRX2] = {
> + .attrs =&tsl2X7X_device_attr_group_tbl[ALSPRX2],
> + .event_attrs =&tsl2X7X_event_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,
> + },
> +};
> +
> +static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
> + [ALS] = {
> + .channel = {
> + {
> + .type = IIO_LIGHT,
> + .indexed = 1,
> + .channel = 0,
> + .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT,
> + }, {
> + .type = IIO_INTENSITY,
> + .indexed = 1,
> + .channel = 0,
> + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
> + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
> + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
> + .event_mask = TSL2X7X_EVENT_MASK
> + }, {
> + .type = IIO_INTENSITY,
> + .indexed = 1,
> + .channel = 1,
> + },
> + },
> + .chan_table_elements = 3,
> + .info =&tsl2X7X_device_info[ALS],
> + },
> + [PRX] = {
> + .channel = {
> + {
> + .type = IIO_PROXIMITY,
> + .indexed = 1,
> + .channel = 0,
> + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
> + .event_mask = TSL2X7X_EVENT_MASK
> + },
> + },
> + .chan_table_elements = 1,
> + .info =&tsl2X7X_device_info[PRX],
> + },
> + [ALSPRX] = {
> + .channel = {
> + {
> + .type = IIO_LIGHT,
> + .indexed = 1,
> + .channel = 0,
> + .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT
> + }, {
> + .type = IIO_INTENSITY,
> + .indexed = 1,
> + .channel = 0,
> + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
> + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
> + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
> + .event_mask = TSL2X7X_EVENT_MASK
> + }, {
> + .type = IIO_INTENSITY,
> + .indexed = 1,
> + .channel = 1,
> + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
> + }, {
> + .type = IIO_PROXIMITY,
> + .indexed = 1,
> + .channel = 0,
> + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
> + .event_mask = TSL2X7X_EVENT_MASK
> + },
> + },
> + .chan_table_elements = 4,
> + .info =&tsl2X7X_device_info[ALSPRX],
> + },
> + [PRX2] = {
> + .channel = {
> + {
> + .type = IIO_PROXIMITY,
> + .indexed = 1,
> + .channel = 0,
> + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
> + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
> + .event_mask = TSL2X7X_EVENT_MASK
> + },
> + },
> + .chan_table_elements = 1,
> + .info =&tsl2X7X_device_info[PRX2],
> + },
> + [ALSPRX2] = {
> + .channel = {
> + {
> + .type = IIO_LIGHT,
> + .indexed = 1,
> + .channel = 0,
> + .info_mask = IIO_CHAN_INFO_PROCESSED_SEPARATE_BIT,
> + }, {
> + .type = IIO_INTENSITY,
> + .indexed = 1,
> + .channel = 0,
> + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
> + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT |
> + IIO_CHAN_INFO_CALIBBIAS_SEPARATE_BIT,
> + .event_mask = TSL2X7X_EVENT_MASK
> + }, {
> + .type = IIO_INTENSITY,
> + .indexed = 1,
> + .channel = 1,
> + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
> + }, {
> + .type = IIO_PROXIMITY,
> + .indexed = 1,
> + .channel = 0,
> + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
> + IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
> + .event_mask = TSL2X7X_EVENT_MASK
> + },
> + },
> + .chan_table_elements = 4,
> + .info =&tsl2X7X_device_info[ALSPRX2],
> + },
> +};
> +
> +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,
> + "%s: i2c device found does not match expected id\n",
> + __func__);
> + goto fail1;
> + }
> +
> + ret = i2c_smbus_write_byte(clientp, (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
> + if (ret< 0) {
> + dev_err(&clientp->dev, "%s: write to cmd reg failed. err = %d\n",
> + __func__, ret);
> + goto fail1;
> + }
> +
> + /* ALS and PROX functions can be invoked via user space poll
> + * or H/W interrupt. If busy return last sample. */
> + mutex_init(&chip->als_mutex);
> + mutex_init(&chip->prox_mutex);
> +
> + chip->tsl2x7x_chip_status = TSL2X7X_CHIP_UNKNOWN;
> + chip->pdata = clientp->dev.platform_data;
> + chip->id = id->driver_data;
> + chip->chip_info =
> + &tsl2x7x_chip_info_tbl[device_channel_config[id->driver_data]];
> +
> + indio_dev->info = chip->chip_info->info;
> + indio_dev->dev.parent =&clientp->dev;
> + indio_dev->modes = INDIO_DIRECT_MODE;
> + indio_dev->name = chip->client->name;
> + indio_dev->channels = chip->chip_info->channel;
> + indio_dev->num_channels = chip->chip_info->chan_table_elements;
> +
> + if (clientp->irq) {
> + ret = request_threaded_irq(clientp->irq,
> + NULL,
> + &tsl2x7x_event_handler,
> + IRQF_TRIGGER_RISING | IRQF_ONESHOT,
> + "TSL2X7X_event",
> + indio_dev);
> + if (ret) {
> + dev_err(&clientp->dev,
> + "%s: irq request failed", __func__);
> + goto fail2;
> + }
> + }
> +
> + /* Load up the defaults */
> + tsl2x7x_defaults(chip);
> + /* Make sure the chip is on */
> + tsl2x7x_chip_on(indio_dev);
> +
> + ret = iio_device_register(indio_dev);
> + if (ret) {
> + dev_err(&clientp->dev,
> + "%s: iio registration failed\n", __func__);
> + goto fail1;
> + }
> +
> + dev_info(&clientp->dev, "%s Light sensor found.\n", id->name);
> +
> + return 0;
> +
> +fail1:
> + if (clientp->irq)
> + free_irq(clientp->irq, indio_dev);
> +fail2:
> + iio_free_device(indio_dev);
> +
> + return ret;
> +}
> +
> +static int tsl2x7x_suspend(struct device *dev)
> +{
> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
> + int ret = 0;
> +
> + if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
> + ret = tsl2x7x_chip_off(indio_dev);
> + chip->tsl2x7x_chip_status = TSL2X7X_CHIP_SUSPENDED;
> + }
> +
> + if (chip->pdata&& chip->pdata->platform_power) {
> + pm_message_t pmm = {PM_EVENT_SUSPEND};
> + chip->pdata->platform_power(dev, pmm);
> + }
> +
> + return ret;
> +}
> +
> +static int tsl2x7x_resume(struct device *dev)
> +{
> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> + struct tsl2X7X_chip *chip = iio_priv(indio_dev);
> + int ret = 0;
> +
> + if (chip->pdata&& chip->pdata->platform_power) {
> + pm_message_t pmm = {PM_EVENT_RESUME};
> + chip->pdata->platform_power(dev, pmm);
> + }
> +
> + if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_SUSPENDED)
> + ret = tsl2x7x_chip_on(indio_dev);
> +
> + return ret;
> +}
> +
> +static int __devexit tsl2x7x_remove(struct i2c_client *client)
> +{
> + struct tsl2X7X_chip *chip = i2c_get_clientdata(client);
> + struct iio_dev *indio_dev = iio_priv_to_dev(chip);
> +
> + tsl2x7x_chip_off(indio_dev);
> +
> + iio_device_unregister(indio_dev);
> + if (client->irq)
> + free_irq(client->irq, chip->client->name);
> +
> + iio_free_device(indio_dev);
> +
> + return 0;
> +}
> +
> +static struct i2c_device_id tsl2x7x_idtable[] = {
> + { "tsl2571", tsl2571 },
> + { "tsl2671", tsl2671 },
> + { "tmd2671", tmd2671 },
> + { "tsl2771", tsl2771 },
> + { "tmd2771", tmd2771 },
> + { "tsl2572", tsl2572 },
> + { "tsl2672", tsl2672 },
> + { "tmd2672", tmd2672 },
> + { "tsl2772", tsl2772 },
> + { "tmd2772", tmd2772 },
> + {}
> +};
> +
> +MODULE_DEVICE_TABLE(i2c, tsl2x7x_idtable);
> +
> +static const struct dev_pm_ops tsl2x7x_pm_ops = {
> + .suspend = tsl2x7x_suspend,
> + .resume = tsl2x7x_resume,
> +};
> +
> +/* Driver definition */
> +static struct i2c_driver tsl2x7x_driver = {
> + .driver = {
> + .name = "tsl2x7x",
> + .pm =&tsl2x7x_pm_ops,
> + },
> + .id_table = tsl2x7x_idtable,
> + .probe = tsl2x7x_probe,
> + .remove = __devexit_p(tsl2x7x_remove),
> +};
> +
> +module_i2c_driver(tsl2x7x_driver);
> +
> +MODULE_AUTHOR("J. August Brenner<jbrenner@taosinc.com>");
> +MODULE_DESCRIPTION("TAOS tsl2x7x ambient and proximity light sensor driver");
> +MODULE_LICENSE("GPL");
> --
> 1.7.4.1
>
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