1226 строки
32 KiB
C
1226 строки
32 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2021 Joe Sandom <joe.g.sandom@gmail.com>
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*
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* Datasheet: https://ams.com/tsl25911#tab/documents
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*
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* Device driver for the TAOS TSL2591. This is a very-high sensitivity
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* light-to-digital converter that transforms light intensity into a digital
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* signal.
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*/
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#include <linux/bitfield.h>
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#include <linux/debugfs.h>
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#include <linux/delay.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/iopoll.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/pm_runtime.h>
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#include <linux/sysfs.h>
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#include <asm/unaligned.h>
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#include <linux/iio/events.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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/* ADC integration time, field value to time in ms */
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#define TSL2591_FVAL_TO_MSEC(x) (((x) + 1) * 100)
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/* ADC integration time, field value to time in seconds */
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#define TSL2591_FVAL_TO_SEC(x) ((x) + 1)
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/* ADC integration time, time in seconds to field value */
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#define TSL2591_SEC_TO_FVAL(x) ((x) - 1)
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/* TSL2591 register set */
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#define TSL2591_ENABLE 0x00
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#define TSL2591_CONTROL 0x01
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#define TSL2591_AILTL 0x04
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#define TSL2591_AILTH 0x05
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#define TSL2591_AIHTL 0x06
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#define TSL2591_AIHTH 0x07
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#define TSL2591_NP_AILTL 0x08
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#define TSL2591_NP_AILTH 0x09
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#define TSL2591_NP_AIHTL 0x0A
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#define TSL2591_NP_AIHTH 0x0B
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#define TSL2591_PERSIST 0x0C
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#define TSL2591_PACKAGE_ID 0x11
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#define TSL2591_DEVICE_ID 0x12
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#define TSL2591_STATUS 0x13
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#define TSL2591_C0_DATAL 0x14
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#define TSL2591_C0_DATAH 0x15
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#define TSL2591_C1_DATAL 0x16
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#define TSL2591_C1_DATAH 0x17
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/* TSL2591 command register definitions */
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#define TSL2591_CMD_NOP 0xA0
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#define TSL2591_CMD_SF_INTSET 0xE4
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#define TSL2591_CMD_SF_CALS_I 0xE5
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#define TSL2591_CMD_SF_CALS_NPI 0xE7
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#define TSL2591_CMD_SF_CNP_ALSI 0xEA
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/* TSL2591 enable register definitions */
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#define TSL2591_PWR_ON 0x01
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#define TSL2591_PWR_OFF 0x00
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#define TSL2591_ENABLE_ALS 0x02
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#define TSL2591_ENABLE_ALS_INT 0x10
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#define TSL2591_ENABLE_SLEEP_INT 0x40
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#define TSL2591_ENABLE_NP_INT 0x80
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/* TSL2591 control register definitions */
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#define TSL2591_CTRL_ALS_INTEGRATION_100MS 0x00
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#define TSL2591_CTRL_ALS_INTEGRATION_200MS 0x01
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#define TSL2591_CTRL_ALS_INTEGRATION_300MS 0x02
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#define TSL2591_CTRL_ALS_INTEGRATION_400MS 0x03
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#define TSL2591_CTRL_ALS_INTEGRATION_500MS 0x04
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#define TSL2591_CTRL_ALS_INTEGRATION_600MS 0x05
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#define TSL2591_CTRL_ALS_LOW_GAIN 0x00
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#define TSL2591_CTRL_ALS_MED_GAIN 0x10
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#define TSL2591_CTRL_ALS_HIGH_GAIN 0x20
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#define TSL2591_CTRL_ALS_MAX_GAIN 0x30
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#define TSL2591_CTRL_SYS_RESET 0x80
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/* TSL2591 persist register definitions */
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#define TSL2591_PRST_ALS_INT_CYCLE_0 0x00
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#define TSL2591_PRST_ALS_INT_CYCLE_ANY 0x01
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#define TSL2591_PRST_ALS_INT_CYCLE_2 0x02
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#define TSL2591_PRST_ALS_INT_CYCLE_3 0x03
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#define TSL2591_PRST_ALS_INT_CYCLE_5 0x04
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#define TSL2591_PRST_ALS_INT_CYCLE_10 0x05
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#define TSL2591_PRST_ALS_INT_CYCLE_15 0x06
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#define TSL2591_PRST_ALS_INT_CYCLE_20 0x07
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#define TSL2591_PRST_ALS_INT_CYCLE_25 0x08
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#define TSL2591_PRST_ALS_INT_CYCLE_30 0x09
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#define TSL2591_PRST_ALS_INT_CYCLE_35 0x0A
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#define TSL2591_PRST_ALS_INT_CYCLE_40 0x0B
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#define TSL2591_PRST_ALS_INT_CYCLE_45 0x0C
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#define TSL2591_PRST_ALS_INT_CYCLE_50 0x0D
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#define TSL2591_PRST_ALS_INT_CYCLE_55 0x0E
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#define TSL2591_PRST_ALS_INT_CYCLE_60 0x0F
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#define TSL2591_PRST_ALS_INT_CYCLE_MAX (BIT(4) - 1)
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/* TSL2591 PID register mask */
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#define TSL2591_PACKAGE_ID_MASK GENMASK(5, 4)
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/* TSL2591 ID register mask */
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#define TSL2591_DEVICE_ID_MASK GENMASK(7, 0)
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/* TSL2591 status register masks */
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#define TSL2591_STS_ALS_VALID_MASK BIT(0)
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#define TSL2591_STS_ALS_INT_MASK BIT(4)
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#define TSL2591_STS_NPERS_INT_MASK BIT(5)
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#define TSL2591_STS_VAL_HIGH_MASK BIT(0)
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/* TSL2591 constant values */
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#define TSL2591_PACKAGE_ID_VAL 0x00
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#define TSL2591_DEVICE_ID_VAL 0x50
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/* Power off suspend delay time MS */
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#define TSL2591_POWER_OFF_DELAY_MS 2000
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/* TSL2591 default values */
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#define TSL2591_DEFAULT_ALS_INT_TIME TSL2591_CTRL_ALS_INTEGRATION_300MS
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#define TSL2591_DEFAULT_ALS_GAIN TSL2591_CTRL_ALS_MED_GAIN
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#define TSL2591_DEFAULT_ALS_PERSIST TSL2591_PRST_ALS_INT_CYCLE_ANY
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#define TSL2591_DEFAULT_ALS_LOWER_THRESH 100
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#define TSL2591_DEFAULT_ALS_UPPER_THRESH 1500
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/* TSL2591 number of data registers */
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#define TSL2591_NUM_DATA_REGISTERS 4
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/* TSL2591 number of valid status reads on ADC complete */
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#define TSL2591_ALS_STS_VALID_COUNT 10
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/* TSL2591 delay period between polls when checking for ALS valid flag */
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#define TSL2591_DELAY_PERIOD_US 10000
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/* TSL2591 maximum values */
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#define TSL2591_MAX_ALS_INT_TIME_MS 600
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#define TSL2591_ALS_MAX_VALUE (BIT(16) - 1)
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/*
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* LUX calculations;
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* AGAIN values from Adafruit's TSL2591 Arduino library
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* https://github.com/adafruit/Adafruit_TSL2591_Library
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*/
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#define TSL2591_CTRL_ALS_LOW_GAIN_MULTIPLIER 1
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#define TSL2591_CTRL_ALS_MED_GAIN_MULTIPLIER 25
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#define TSL2591_CTRL_ALS_HIGH_GAIN_MULTIPLIER 428
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#define TSL2591_CTRL_ALS_MAX_GAIN_MULTIPLIER 9876
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#define TSL2591_LUX_COEFFICIENT 408
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struct tsl2591_als_settings {
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u16 als_lower_thresh;
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u16 als_upper_thresh;
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u8 als_int_time;
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u8 als_persist;
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u8 als_gain;
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};
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struct tsl2591_chip {
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struct tsl2591_als_settings als_settings;
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struct i2c_client *client;
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/*
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* Keep als_settings in sync with hardware state
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* and ensure multiple readers are serialized.
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*/
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struct mutex als_mutex;
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bool events_enabled;
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};
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/*
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* Period table is ALS persist cycle x integration time setting
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* Integration times: 100ms, 200ms, 300ms, 400ms, 500ms, 600ms
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* ALS cycles: 1, 2, 3, 5, 10, 20, 25, 30, 35, 40, 45, 50, 55, 60
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*/
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static const char * const tsl2591_als_period_list[] = {
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"0.1 0.2 0.3 0.5 1.0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0",
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"0.2 0.4 0.6 1.0 2.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0",
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"0.3 0.6 0.9 1.5 3.0 6.0 7.5 9.0 10.5 12.0 13.5 15.0 16.5 18.0",
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"0.4 0.8 1.2 2.0 4.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0",
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"0.5 1.0 1.5 2.5 5.0 10.0 12.5 15.0 17.5 20.0 22.5 25.0 27.5 30.0",
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"0.6 1.2 1.8 3.0 6.0 12.0 15.0 18.0 21.0 24.0 27.0 30.0 33.0 36.0",
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};
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static const int tsl2591_int_time_available[] = {
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1, 2, 3, 4, 5, 6,
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};
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static const int tsl2591_calibscale_available[] = {
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1, 25, 428, 9876,
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};
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static int tsl2591_set_als_lower_threshold(struct tsl2591_chip *chip,
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u16 als_lower_threshold);
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static int tsl2591_set_als_upper_threshold(struct tsl2591_chip *chip,
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u16 als_upper_threshold);
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static int tsl2591_gain_to_multiplier(const u8 als_gain)
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{
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switch (als_gain) {
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case TSL2591_CTRL_ALS_LOW_GAIN:
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return TSL2591_CTRL_ALS_LOW_GAIN_MULTIPLIER;
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case TSL2591_CTRL_ALS_MED_GAIN:
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return TSL2591_CTRL_ALS_MED_GAIN_MULTIPLIER;
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case TSL2591_CTRL_ALS_HIGH_GAIN:
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return TSL2591_CTRL_ALS_HIGH_GAIN_MULTIPLIER;
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case TSL2591_CTRL_ALS_MAX_GAIN:
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return TSL2591_CTRL_ALS_MAX_GAIN_MULTIPLIER;
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default:
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return -EINVAL;
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}
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}
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static int tsl2591_multiplier_to_gain(const u32 multiplier)
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{
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switch (multiplier) {
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case TSL2591_CTRL_ALS_LOW_GAIN_MULTIPLIER:
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return TSL2591_CTRL_ALS_LOW_GAIN;
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case TSL2591_CTRL_ALS_MED_GAIN_MULTIPLIER:
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return TSL2591_CTRL_ALS_MED_GAIN;
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case TSL2591_CTRL_ALS_HIGH_GAIN_MULTIPLIER:
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return TSL2591_CTRL_ALS_HIGH_GAIN;
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case TSL2591_CTRL_ALS_MAX_GAIN_MULTIPLIER:
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return TSL2591_CTRL_ALS_MAX_GAIN;
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default:
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return -EINVAL;
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}
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}
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static int tsl2591_persist_cycle_to_lit(const u8 als_persist)
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{
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switch (als_persist) {
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case TSL2591_PRST_ALS_INT_CYCLE_ANY:
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return 1;
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case TSL2591_PRST_ALS_INT_CYCLE_2:
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return 2;
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case TSL2591_PRST_ALS_INT_CYCLE_3:
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return 3;
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case TSL2591_PRST_ALS_INT_CYCLE_5:
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return 5;
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case TSL2591_PRST_ALS_INT_CYCLE_10:
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return 10;
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case TSL2591_PRST_ALS_INT_CYCLE_15:
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return 15;
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case TSL2591_PRST_ALS_INT_CYCLE_20:
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return 20;
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case TSL2591_PRST_ALS_INT_CYCLE_25:
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return 25;
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case TSL2591_PRST_ALS_INT_CYCLE_30:
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return 30;
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case TSL2591_PRST_ALS_INT_CYCLE_35:
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return 35;
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case TSL2591_PRST_ALS_INT_CYCLE_40:
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return 40;
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case TSL2591_PRST_ALS_INT_CYCLE_45:
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return 45;
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case TSL2591_PRST_ALS_INT_CYCLE_50:
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return 50;
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case TSL2591_PRST_ALS_INT_CYCLE_55:
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return 55;
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case TSL2591_PRST_ALS_INT_CYCLE_60:
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return 60;
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default:
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return -EINVAL;
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}
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}
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static int tsl2591_persist_lit_to_cycle(const u8 als_persist)
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{
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switch (als_persist) {
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case 1:
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return TSL2591_PRST_ALS_INT_CYCLE_ANY;
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case 2:
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return TSL2591_PRST_ALS_INT_CYCLE_2;
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case 3:
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return TSL2591_PRST_ALS_INT_CYCLE_3;
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case 5:
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return TSL2591_PRST_ALS_INT_CYCLE_5;
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case 10:
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return TSL2591_PRST_ALS_INT_CYCLE_10;
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case 15:
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return TSL2591_PRST_ALS_INT_CYCLE_15;
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case 20:
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return TSL2591_PRST_ALS_INT_CYCLE_20;
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case 25:
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return TSL2591_PRST_ALS_INT_CYCLE_25;
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case 30:
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return TSL2591_PRST_ALS_INT_CYCLE_30;
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case 35:
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return TSL2591_PRST_ALS_INT_CYCLE_35;
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case 40:
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return TSL2591_PRST_ALS_INT_CYCLE_40;
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case 45:
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return TSL2591_PRST_ALS_INT_CYCLE_45;
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case 50:
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return TSL2591_PRST_ALS_INT_CYCLE_50;
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case 55:
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return TSL2591_PRST_ALS_INT_CYCLE_55;
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case 60:
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return TSL2591_PRST_ALS_INT_CYCLE_60;
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default:
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return -EINVAL;
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}
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}
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static int tsl2591_compatible_int_time(struct tsl2591_chip *chip,
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const u32 als_integration_time)
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{
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switch (als_integration_time) {
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case TSL2591_CTRL_ALS_INTEGRATION_100MS:
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case TSL2591_CTRL_ALS_INTEGRATION_200MS:
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case TSL2591_CTRL_ALS_INTEGRATION_300MS:
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case TSL2591_CTRL_ALS_INTEGRATION_400MS:
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case TSL2591_CTRL_ALS_INTEGRATION_500MS:
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case TSL2591_CTRL_ALS_INTEGRATION_600MS:
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return 0;
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default:
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return -EINVAL;
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}
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}
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static int tsl2591_als_time_to_fval(const u32 als_integration_time)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(tsl2591_int_time_available); i++) {
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if (als_integration_time == tsl2591_int_time_available[i])
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return TSL2591_SEC_TO_FVAL(als_integration_time);
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}
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return -EINVAL;
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}
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static int tsl2591_compatible_gain(struct tsl2591_chip *chip, const u8 als_gain)
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{
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switch (als_gain) {
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case TSL2591_CTRL_ALS_LOW_GAIN:
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case TSL2591_CTRL_ALS_MED_GAIN:
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case TSL2591_CTRL_ALS_HIGH_GAIN:
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case TSL2591_CTRL_ALS_MAX_GAIN:
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return 0;
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default:
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return -EINVAL;
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}
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}
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static int tsl2591_compatible_als_persist_cycle(struct tsl2591_chip *chip,
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const u32 als_persist)
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{
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switch (als_persist) {
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case TSL2591_PRST_ALS_INT_CYCLE_ANY:
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case TSL2591_PRST_ALS_INT_CYCLE_2:
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case TSL2591_PRST_ALS_INT_CYCLE_3:
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case TSL2591_PRST_ALS_INT_CYCLE_5:
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case TSL2591_PRST_ALS_INT_CYCLE_10:
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case TSL2591_PRST_ALS_INT_CYCLE_15:
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case TSL2591_PRST_ALS_INT_CYCLE_20:
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case TSL2591_PRST_ALS_INT_CYCLE_25:
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case TSL2591_PRST_ALS_INT_CYCLE_30:
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case TSL2591_PRST_ALS_INT_CYCLE_35:
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case TSL2591_PRST_ALS_INT_CYCLE_40:
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case TSL2591_PRST_ALS_INT_CYCLE_45:
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case TSL2591_PRST_ALS_INT_CYCLE_50:
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case TSL2591_PRST_ALS_INT_CYCLE_55:
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case TSL2591_PRST_ALS_INT_CYCLE_60:
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return 0;
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default:
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return -EINVAL;
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}
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}
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static int tsl2591_check_als_valid(struct i2c_client *client)
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{
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int ret;
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ret = i2c_smbus_read_byte_data(client, TSL2591_CMD_NOP | TSL2591_STATUS);
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if (ret < 0) {
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dev_err(&client->dev, "Failed to read register\n");
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return -EINVAL;
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}
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return FIELD_GET(TSL2591_STS_ALS_VALID_MASK, ret);
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}
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static int tsl2591_wait_adc_complete(struct tsl2591_chip *chip)
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{
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struct tsl2591_als_settings settings = chip->als_settings;
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struct i2c_client *client = chip->client;
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int delay;
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int val;
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int ret;
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delay = TSL2591_FVAL_TO_MSEC(settings.als_int_time);
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if (!delay)
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return -EINVAL;
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/*
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* Sleep for ALS integration time to allow enough time or an ADC read
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* cycle to complete. Check status after delay for ALS valid.
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*/
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msleep(delay);
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/* Check for status ALS valid flag for up to 100ms */
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ret = readx_poll_timeout(tsl2591_check_als_valid, client,
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val, val == TSL2591_STS_VAL_HIGH_MASK,
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TSL2591_DELAY_PERIOD_US,
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TSL2591_DELAY_PERIOD_US * TSL2591_ALS_STS_VALID_COUNT);
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if (ret)
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dev_err(&client->dev, "Timed out waiting for valid ALS data\n");
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return ret;
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}
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/*
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* tsl2591_read_channel_data - Reads raw channel data and calculates lux
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*
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* Formula for lux calculation;
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* Derived from Adafruit's TSL2591 library
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* Link: https://github.com/adafruit/Adafruit_TSL2591_Library
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* Counts Per Lux (CPL) = (ATIME_ms * AGAIN) / LUX DF
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* lux = ((C0DATA - C1DATA) * (1 - (C1DATA / C0DATA))) / CPL
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*
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* Scale values to get more representative value of lux i.e.
|
|
* lux = ((C0DATA - C1DATA) * (1000 - ((C1DATA * 1000) / C0DATA))) / CPL
|
|
*
|
|
* Channel 0 = IR + Visible
|
|
* Channel 1 = IR only
|
|
*/
|
|
static int tsl2591_read_channel_data(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
int *val, int *val2)
|
|
{
|
|
struct tsl2591_chip *chip = iio_priv(indio_dev);
|
|
struct tsl2591_als_settings *settings = &chip->als_settings;
|
|
struct i2c_client *client = chip->client;
|
|
u8 als_data[TSL2591_NUM_DATA_REGISTERS];
|
|
int counts_per_lux, int_time_fval, gain_multi, lux;
|
|
u16 als_ch0, als_ch1;
|
|
int ret;
|
|
|
|
ret = tsl2591_wait_adc_complete(chip);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "No data available. Err: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = i2c_smbus_read_i2c_block_data(client,
|
|
TSL2591_CMD_NOP | TSL2591_C0_DATAL,
|
|
sizeof(als_data), als_data);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "Failed to read data bytes");
|
|
return ret;
|
|
}
|
|
|
|
als_ch0 = get_unaligned_le16(&als_data[0]);
|
|
als_ch1 = get_unaligned_le16(&als_data[2]);
|
|
|
|
switch (chan->type) {
|
|
case IIO_INTENSITY:
|
|
if (chan->channel2 == IIO_MOD_LIGHT_BOTH)
|
|
*val = als_ch0;
|
|
else if (chan->channel2 == IIO_MOD_LIGHT_IR)
|
|
*val = als_ch1;
|
|
else
|
|
return -EINVAL;
|
|
break;
|
|
case IIO_LIGHT:
|
|
gain_multi = tsl2591_gain_to_multiplier(settings->als_gain);
|
|
if (gain_multi < 0) {
|
|
dev_err(&client->dev, "Invalid multiplier");
|
|
return gain_multi;
|
|
}
|
|
|
|
int_time_fval = TSL2591_FVAL_TO_MSEC(settings->als_int_time);
|
|
/* Calculate counts per lux value */
|
|
counts_per_lux = (int_time_fval * gain_multi) / TSL2591_LUX_COEFFICIENT;
|
|
|
|
dev_dbg(&client->dev, "Counts Per Lux: %d\n", counts_per_lux);
|
|
|
|
/* Calculate lux value */
|
|
lux = ((als_ch0 - als_ch1) *
|
|
(1000 - ((als_ch1 * 1000) / als_ch0))) / counts_per_lux;
|
|
|
|
dev_dbg(&client->dev, "Raw lux calculation: %d\n", lux);
|
|
|
|
/* Divide by 1000 to get real lux value before scaling */
|
|
*val = lux / 1000;
|
|
|
|
/* Get the decimal part of lux reading */
|
|
*val2 = (lux - (*val * 1000)) * 1000;
|
|
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tsl2591_set_als_gain_int_time(struct tsl2591_chip *chip)
|
|
{
|
|
struct tsl2591_als_settings als_settings = chip->als_settings;
|
|
struct i2c_client *client = chip->client;
|
|
int ret;
|
|
|
|
ret = i2c_smbus_write_byte_data(client,
|
|
TSL2591_CMD_NOP | TSL2591_CONTROL,
|
|
als_settings.als_int_time | als_settings.als_gain);
|
|
if (ret)
|
|
dev_err(&client->dev, "Failed to set als gain & int time\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int tsl2591_set_als_lower_threshold(struct tsl2591_chip *chip,
|
|
u16 als_lower_threshold)
|
|
{
|
|
struct tsl2591_als_settings als_settings = chip->als_settings;
|
|
struct i2c_client *client = chip->client;
|
|
u16 als_upper_threshold;
|
|
u8 als_lower_l;
|
|
u8 als_lower_h;
|
|
int ret;
|
|
|
|
chip->als_settings.als_lower_thresh = als_lower_threshold;
|
|
|
|
/*
|
|
* Lower threshold should not be greater or equal to upper.
|
|
* If this is the case, then assert upper threshold to new lower
|
|
* threshold + 1 to avoid ordering issues when setting thresholds.
|
|
*/
|
|
if (als_lower_threshold >= als_settings.als_upper_thresh) {
|
|
als_upper_threshold = als_lower_threshold + 1;
|
|
tsl2591_set_als_upper_threshold(chip, als_upper_threshold);
|
|
}
|
|
|
|
als_lower_l = als_lower_threshold;
|
|
als_lower_h = als_lower_threshold >> 8;
|
|
|
|
ret = i2c_smbus_write_byte_data(client,
|
|
TSL2591_CMD_NOP | TSL2591_AILTL,
|
|
als_lower_l);
|
|
if (ret) {
|
|
dev_err(&client->dev, "Failed to set als lower threshold\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = i2c_smbus_write_byte_data(client,
|
|
TSL2591_CMD_NOP | TSL2591_AILTH,
|
|
als_lower_h);
|
|
if (ret) {
|
|
dev_err(&client->dev, "Failed to set als lower threshold\n");
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tsl2591_set_als_upper_threshold(struct tsl2591_chip *chip,
|
|
u16 als_upper_threshold)
|
|
{
|
|
struct tsl2591_als_settings als_settings = chip->als_settings;
|
|
struct i2c_client *client = chip->client;
|
|
u16 als_lower_threshold;
|
|
u8 als_upper_l;
|
|
u8 als_upper_h;
|
|
int ret;
|
|
|
|
if (als_upper_threshold > TSL2591_ALS_MAX_VALUE)
|
|
return -EINVAL;
|
|
|
|
chip->als_settings.als_upper_thresh = als_upper_threshold;
|
|
|
|
/*
|
|
* Upper threshold should not be less than lower. If this
|
|
* is the case, then assert lower threshold to new upper
|
|
* threshold - 1 to avoid ordering issues when setting thresholds.
|
|
*/
|
|
if (als_upper_threshold < als_settings.als_lower_thresh) {
|
|
als_lower_threshold = als_upper_threshold - 1;
|
|
tsl2591_set_als_lower_threshold(chip, als_lower_threshold);
|
|
}
|
|
|
|
als_upper_l = als_upper_threshold;
|
|
als_upper_h = als_upper_threshold >> 8;
|
|
|
|
ret = i2c_smbus_write_byte_data(client,
|
|
TSL2591_CMD_NOP | TSL2591_AIHTL,
|
|
als_upper_l);
|
|
if (ret) {
|
|
dev_err(&client->dev, "Failed to set als upper threshold\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = i2c_smbus_write_byte_data(client,
|
|
TSL2591_CMD_NOP | TSL2591_AIHTH,
|
|
als_upper_h);
|
|
if (ret) {
|
|
dev_err(&client->dev, "Failed to set als upper threshold\n");
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tsl2591_set_als_persist_cycle(struct tsl2591_chip *chip,
|
|
u8 als_persist)
|
|
{
|
|
struct i2c_client *client = chip->client;
|
|
int ret;
|
|
|
|
ret = i2c_smbus_write_byte_data(client,
|
|
TSL2591_CMD_NOP | TSL2591_PERSIST,
|
|
als_persist);
|
|
if (ret)
|
|
dev_err(&client->dev, "Failed to set als persist cycle\n");
|
|
|
|
chip->als_settings.als_persist = als_persist;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int tsl2591_set_power_state(struct tsl2591_chip *chip, u8 state)
|
|
{
|
|
struct i2c_client *client = chip->client;
|
|
int ret;
|
|
|
|
ret = i2c_smbus_write_byte_data(client,
|
|
TSL2591_CMD_NOP | TSL2591_ENABLE,
|
|
state);
|
|
if (ret)
|
|
dev_err(&client->dev,
|
|
"Failed to set the power state to %#04x\n", state);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t tsl2591_in_illuminance_period_available_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
|
|
struct tsl2591_chip *chip = iio_priv(indio_dev);
|
|
|
|
return sysfs_emit(buf, "%s\n",
|
|
tsl2591_als_period_list[chip->als_settings.als_int_time]);
|
|
}
|
|
|
|
static IIO_DEVICE_ATTR_RO(tsl2591_in_illuminance_period_available, 0);
|
|
|
|
static struct attribute *tsl2591_event_attrs_ctrl[] = {
|
|
&iio_dev_attr_tsl2591_in_illuminance_period_available.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group tsl2591_event_attribute_group = {
|
|
.attrs = tsl2591_event_attrs_ctrl,
|
|
};
|
|
|
|
static const struct iio_event_spec tsl2591_events[] = {
|
|
{
|
|
.type = IIO_EV_TYPE_THRESH,
|
|
.dir = IIO_EV_DIR_RISING,
|
|
.mask_separate = BIT(IIO_EV_INFO_VALUE),
|
|
}, {
|
|
.type = IIO_EV_TYPE_THRESH,
|
|
.dir = IIO_EV_DIR_FALLING,
|
|
.mask_separate = BIT(IIO_EV_INFO_VALUE),
|
|
}, {
|
|
.type = IIO_EV_TYPE_THRESH,
|
|
.dir = IIO_EV_DIR_EITHER,
|
|
.mask_separate = BIT(IIO_EV_INFO_PERIOD) |
|
|
BIT(IIO_EV_INFO_ENABLE),
|
|
},
|
|
};
|
|
|
|
static const struct iio_chan_spec tsl2591_channels[] = {
|
|
{
|
|
.type = IIO_INTENSITY,
|
|
.modified = 1,
|
|
.channel2 = IIO_MOD_LIGHT_IR,
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
|
|
.info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) |
|
|
BIT(IIO_CHAN_INFO_CALIBSCALE),
|
|
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME) |
|
|
BIT(IIO_CHAN_INFO_CALIBSCALE)
|
|
},
|
|
{
|
|
.type = IIO_INTENSITY,
|
|
.modified = 1,
|
|
.channel2 = IIO_MOD_LIGHT_BOTH,
|
|
.event_spec = tsl2591_events,
|
|
.num_event_specs = ARRAY_SIZE(tsl2591_events),
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
|
|
.info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) |
|
|
BIT(IIO_CHAN_INFO_CALIBSCALE),
|
|
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME) |
|
|
BIT(IIO_CHAN_INFO_CALIBSCALE)
|
|
},
|
|
{
|
|
.type = IIO_LIGHT,
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
|
|
.info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_INT_TIME) |
|
|
BIT(IIO_CHAN_INFO_CALIBSCALE),
|
|
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME) |
|
|
BIT(IIO_CHAN_INFO_CALIBSCALE)
|
|
},
|
|
};
|
|
|
|
static int tsl2591_read_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
int *val, int *val2, long mask)
|
|
{
|
|
struct tsl2591_chip *chip = iio_priv(indio_dev);
|
|
struct i2c_client *client = chip->client;
|
|
int ret;
|
|
|
|
pm_runtime_get_sync(&client->dev);
|
|
|
|
mutex_lock(&chip->als_mutex);
|
|
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_RAW:
|
|
if (chan->type != IIO_INTENSITY) {
|
|
ret = -EINVAL;
|
|
goto err_unlock;
|
|
}
|
|
|
|
ret = tsl2591_read_channel_data(indio_dev, chan, val, val2);
|
|
if (ret < 0)
|
|
goto err_unlock;
|
|
|
|
ret = IIO_VAL_INT;
|
|
break;
|
|
case IIO_CHAN_INFO_PROCESSED:
|
|
if (chan->type != IIO_LIGHT) {
|
|
ret = -EINVAL;
|
|
goto err_unlock;
|
|
}
|
|
|
|
ret = tsl2591_read_channel_data(indio_dev, chan, val, val2);
|
|
if (ret < 0)
|
|
break;
|
|
|
|
ret = IIO_VAL_INT_PLUS_MICRO;
|
|
break;
|
|
case IIO_CHAN_INFO_INT_TIME:
|
|
if (chan->type != IIO_INTENSITY) {
|
|
ret = -EINVAL;
|
|
goto err_unlock;
|
|
}
|
|
|
|
*val = TSL2591_FVAL_TO_SEC(chip->als_settings.als_int_time);
|
|
ret = IIO_VAL_INT;
|
|
break;
|
|
case IIO_CHAN_INFO_CALIBSCALE:
|
|
if (chan->type != IIO_INTENSITY) {
|
|
ret = -EINVAL;
|
|
goto err_unlock;
|
|
}
|
|
|
|
*val = tsl2591_gain_to_multiplier(chip->als_settings.als_gain);
|
|
ret = IIO_VAL_INT;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
err_unlock:
|
|
mutex_unlock(&chip->als_mutex);
|
|
|
|
pm_runtime_mark_last_busy(&client->dev);
|
|
pm_runtime_put_autosuspend(&client->dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int tsl2591_write_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
int val, int val2, long mask)
|
|
{
|
|
struct tsl2591_chip *chip = iio_priv(indio_dev);
|
|
int int_time;
|
|
int gain;
|
|
int ret;
|
|
|
|
mutex_lock(&chip->als_mutex);
|
|
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_INT_TIME:
|
|
int_time = tsl2591_als_time_to_fval(val);
|
|
if (int_time < 0) {
|
|
ret = int_time;
|
|
goto err_unlock;
|
|
}
|
|
ret = tsl2591_compatible_int_time(chip, int_time);
|
|
if (ret < 0)
|
|
goto err_unlock;
|
|
|
|
chip->als_settings.als_int_time = int_time;
|
|
break;
|
|
case IIO_CHAN_INFO_CALIBSCALE:
|
|
gain = tsl2591_multiplier_to_gain(val);
|
|
if (gain < 0) {
|
|
ret = gain;
|
|
goto err_unlock;
|
|
}
|
|
ret = tsl2591_compatible_gain(chip, gain);
|
|
if (ret < 0)
|
|
goto err_unlock;
|
|
|
|
chip->als_settings.als_gain = gain;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
goto err_unlock;
|
|
}
|
|
|
|
ret = tsl2591_set_als_gain_int_time(chip);
|
|
|
|
err_unlock:
|
|
mutex_unlock(&chip->als_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int tsl2591_read_available(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
const int **vals, int *type, int *length,
|
|
long mask)
|
|
{
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_INT_TIME:
|
|
*length = ARRAY_SIZE(tsl2591_int_time_available);
|
|
*vals = tsl2591_int_time_available;
|
|
*type = IIO_VAL_INT;
|
|
return IIO_AVAIL_LIST;
|
|
|
|
case IIO_CHAN_INFO_CALIBSCALE:
|
|
*length = ARRAY_SIZE(tsl2591_calibscale_available);
|
|
*vals = tsl2591_calibscale_available;
|
|
*type = IIO_VAL_INT;
|
|
return IIO_AVAIL_LIST;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int tsl2591_read_event_value(struct iio_dev *indio_dev,
|
|
const struct iio_chan_spec *chan,
|
|
enum iio_event_type type,
|
|
enum iio_event_direction dir,
|
|
enum iio_event_info info, int *val,
|
|
int *val2)
|
|
{
|
|
struct tsl2591_chip *chip = iio_priv(indio_dev);
|
|
struct i2c_client *client = chip->client;
|
|
int als_persist, int_time, period;
|
|
int ret;
|
|
|
|
mutex_lock(&chip->als_mutex);
|
|
|
|
switch (info) {
|
|
case IIO_EV_INFO_VALUE:
|
|
switch (dir) {
|
|
case IIO_EV_DIR_RISING:
|
|
*val = chip->als_settings.als_upper_thresh;
|
|
break;
|
|
case IIO_EV_DIR_FALLING:
|
|
*val = chip->als_settings.als_lower_thresh;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
goto err_unlock;
|
|
}
|
|
ret = IIO_VAL_INT;
|
|
break;
|
|
case IIO_EV_INFO_PERIOD:
|
|
ret = i2c_smbus_read_byte_data(client,
|
|
TSL2591_CMD_NOP | TSL2591_PERSIST);
|
|
if (ret <= 0 || ret > TSL2591_PRST_ALS_INT_CYCLE_MAX)
|
|
goto err_unlock;
|
|
|
|
als_persist = tsl2591_persist_cycle_to_lit(ret);
|
|
int_time = TSL2591_FVAL_TO_MSEC(chip->als_settings.als_int_time);
|
|
period = als_persist * (int_time * MSEC_PER_SEC);
|
|
|
|
*val = period / USEC_PER_SEC;
|
|
*val2 = period % USEC_PER_SEC;
|
|
|
|
ret = IIO_VAL_INT_PLUS_MICRO;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
err_unlock:
|
|
mutex_unlock(&chip->als_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int tsl2591_write_event_value(struct iio_dev *indio_dev,
|
|
const struct iio_chan_spec *chan,
|
|
enum iio_event_type type,
|
|
enum iio_event_direction dir,
|
|
enum iio_event_info info, int val,
|
|
int val2)
|
|
{
|
|
struct tsl2591_chip *chip = iio_priv(indio_dev);
|
|
int period, int_time, als_persist;
|
|
int ret;
|
|
|
|
if (val < 0 || val2 < 0)
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&chip->als_mutex);
|
|
|
|
switch (info) {
|
|
case IIO_EV_INFO_VALUE:
|
|
if (val > TSL2591_ALS_MAX_VALUE) {
|
|
ret = -EINVAL;
|
|
goto err_unlock;
|
|
}
|
|
|
|
switch (dir) {
|
|
case IIO_EV_DIR_RISING:
|
|
ret = tsl2591_set_als_upper_threshold(chip, val);
|
|
if (ret < 0)
|
|
goto err_unlock;
|
|
break;
|
|
case IIO_EV_DIR_FALLING:
|
|
ret = tsl2591_set_als_lower_threshold(chip, val);
|
|
if (ret < 0)
|
|
goto err_unlock;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
goto err_unlock;
|
|
}
|
|
break;
|
|
case IIO_EV_INFO_PERIOD:
|
|
int_time = TSL2591_FVAL_TO_MSEC(chip->als_settings.als_int_time);
|
|
|
|
period = ((val * MSEC_PER_SEC) +
|
|
(val2 / MSEC_PER_SEC)) / int_time;
|
|
|
|
als_persist = tsl2591_persist_lit_to_cycle(period);
|
|
if (als_persist < 0) {
|
|
ret = -EINVAL;
|
|
goto err_unlock;
|
|
}
|
|
|
|
ret = tsl2591_compatible_als_persist_cycle(chip, als_persist);
|
|
if (ret < 0)
|
|
goto err_unlock;
|
|
|
|
ret = tsl2591_set_als_persist_cycle(chip, als_persist);
|
|
if (ret < 0)
|
|
goto err_unlock;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
err_unlock:
|
|
mutex_unlock(&chip->als_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int tsl2591_read_event_config(struct iio_dev *indio_dev,
|
|
const struct iio_chan_spec *chan,
|
|
enum iio_event_type type,
|
|
enum iio_event_direction dir)
|
|
{
|
|
struct tsl2591_chip *chip = iio_priv(indio_dev);
|
|
|
|
return chip->events_enabled;
|
|
}
|
|
|
|
static int tsl2591_write_event_config(struct iio_dev *indio_dev,
|
|
const struct iio_chan_spec *chan,
|
|
enum iio_event_type type,
|
|
enum iio_event_direction dir,
|
|
int state)
|
|
{
|
|
struct tsl2591_chip *chip = iio_priv(indio_dev);
|
|
struct i2c_client *client = chip->client;
|
|
|
|
if (state && !chip->events_enabled) {
|
|
chip->events_enabled = true;
|
|
pm_runtime_get_sync(&client->dev);
|
|
} else if (!state && chip->events_enabled) {
|
|
chip->events_enabled = false;
|
|
pm_runtime_mark_last_busy(&client->dev);
|
|
pm_runtime_put_autosuspend(&client->dev);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct iio_info tsl2591_info = {
|
|
.event_attrs = &tsl2591_event_attribute_group,
|
|
.read_raw = tsl2591_read_raw,
|
|
.write_raw = tsl2591_write_raw,
|
|
.read_avail = tsl2591_read_available,
|
|
.read_event_value = tsl2591_read_event_value,
|
|
.write_event_value = tsl2591_write_event_value,
|
|
.read_event_config = tsl2591_read_event_config,
|
|
.write_event_config = tsl2591_write_event_config,
|
|
};
|
|
|
|
static const struct iio_info tsl2591_info_no_irq = {
|
|
.read_raw = tsl2591_read_raw,
|
|
.write_raw = tsl2591_write_raw,
|
|
.read_avail = tsl2591_read_available,
|
|
};
|
|
|
|
static int __maybe_unused tsl2591_suspend(struct device *dev)
|
|
{
|
|
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
|
struct tsl2591_chip *chip = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
mutex_lock(&chip->als_mutex);
|
|
ret = tsl2591_set_power_state(chip, TSL2591_PWR_OFF);
|
|
mutex_unlock(&chip->als_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __maybe_unused tsl2591_resume(struct device *dev)
|
|
{
|
|
int power_state = TSL2591_PWR_ON | TSL2591_ENABLE_ALS;
|
|
struct iio_dev *indio_dev = dev_get_drvdata(dev);
|
|
struct tsl2591_chip *chip = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
if (chip->events_enabled)
|
|
power_state |= TSL2591_ENABLE_ALS_INT;
|
|
|
|
mutex_lock(&chip->als_mutex);
|
|
ret = tsl2591_set_power_state(chip, power_state);
|
|
mutex_unlock(&chip->als_mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct dev_pm_ops tsl2591_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
|
|
SET_RUNTIME_PM_OPS(tsl2591_suspend, tsl2591_resume, NULL)
|
|
};
|
|
|
|
static irqreturn_t tsl2591_event_handler(int irq, void *private)
|
|
{
|
|
struct iio_dev *dev_info = private;
|
|
struct tsl2591_chip *chip = iio_priv(dev_info);
|
|
struct i2c_client *client = chip->client;
|
|
|
|
if (!chip->events_enabled)
|
|
return IRQ_NONE;
|
|
|
|
iio_push_event(dev_info,
|
|
IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 0,
|
|
IIO_EV_TYPE_THRESH,
|
|
IIO_EV_DIR_EITHER),
|
|
iio_get_time_ns(dev_info));
|
|
|
|
/* Clear ALS irq */
|
|
i2c_smbus_write_byte(client, TSL2591_CMD_SF_CALS_NPI);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int tsl2591_load_defaults(struct tsl2591_chip *chip)
|
|
{
|
|
int ret;
|
|
|
|
chip->als_settings.als_int_time = TSL2591_DEFAULT_ALS_INT_TIME;
|
|
chip->als_settings.als_gain = TSL2591_DEFAULT_ALS_GAIN;
|
|
chip->als_settings.als_lower_thresh = TSL2591_DEFAULT_ALS_LOWER_THRESH;
|
|
chip->als_settings.als_upper_thresh = TSL2591_DEFAULT_ALS_UPPER_THRESH;
|
|
|
|
ret = tsl2591_set_als_gain_int_time(chip);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = tsl2591_set_als_persist_cycle(chip, TSL2591_DEFAULT_ALS_PERSIST);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = tsl2591_set_als_lower_threshold(chip, TSL2591_DEFAULT_ALS_LOWER_THRESH);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = tsl2591_set_als_upper_threshold(chip, TSL2591_DEFAULT_ALS_UPPER_THRESH);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tsl2591_chip_off(void *data)
|
|
{
|
|
struct iio_dev *indio_dev = data;
|
|
struct tsl2591_chip *chip = iio_priv(indio_dev);
|
|
struct i2c_client *client = chip->client;
|
|
|
|
pm_runtime_disable(&client->dev);
|
|
pm_runtime_set_suspended(&client->dev);
|
|
pm_runtime_put_noidle(&client->dev);
|
|
|
|
tsl2591_set_power_state(chip, TSL2591_PWR_OFF);
|
|
}
|
|
|
|
static int tsl2591_probe(struct i2c_client *client)
|
|
{
|
|
struct tsl2591_chip *chip;
|
|
struct iio_dev *indio_dev;
|
|
int ret;
|
|
|
|
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
|
|
dev_err(&client->dev,
|
|
"I2C smbus byte data functionality is not supported\n");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));
|
|
if (!indio_dev)
|
|
return -ENOMEM;
|
|
|
|
chip = iio_priv(indio_dev);
|
|
chip->client = client;
|
|
i2c_set_clientdata(client, indio_dev);
|
|
|
|
if (client->irq) {
|
|
ret = devm_request_threaded_irq(&client->dev, client->irq,
|
|
NULL, tsl2591_event_handler,
|
|
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
|
|
"tsl2591_irq", indio_dev);
|
|
if (ret) {
|
|
dev_err_probe(&client->dev, ret, "IRQ request error\n");
|
|
return -EINVAL;
|
|
}
|
|
indio_dev->info = &tsl2591_info;
|
|
} else {
|
|
indio_dev->info = &tsl2591_info_no_irq;
|
|
}
|
|
|
|
mutex_init(&chip->als_mutex);
|
|
|
|
ret = i2c_smbus_read_byte_data(client,
|
|
TSL2591_CMD_NOP | TSL2591_DEVICE_ID);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev,
|
|
"Failed to read the device ID register\n");
|
|
return ret;
|
|
}
|
|
ret = FIELD_GET(TSL2591_DEVICE_ID_MASK, ret);
|
|
if (ret != TSL2591_DEVICE_ID_VAL) {
|
|
dev_err(&client->dev, "Device ID: %#04x unknown\n", ret);
|
|
return -EINVAL;
|
|
}
|
|
|
|
indio_dev->channels = tsl2591_channels;
|
|
indio_dev->num_channels = ARRAY_SIZE(tsl2591_channels);
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
indio_dev->name = chip->client->name;
|
|
chip->events_enabled = false;
|
|
|
|
pm_runtime_enable(&client->dev);
|
|
pm_runtime_set_autosuspend_delay(&client->dev,
|
|
TSL2591_POWER_OFF_DELAY_MS);
|
|
pm_runtime_use_autosuspend(&client->dev);
|
|
|
|
/*
|
|
* Add chip off to automatically managed path and disable runtime
|
|
* power management. This ensures that the chip power management
|
|
* is handled correctly on driver remove. tsl2591_chip_off() must be
|
|
* added to the managed path after pm runtime is enabled and before
|
|
* any error exit paths are met to ensure we're not left in a state
|
|
* of pm runtime not being disabled properly.
|
|
*/
|
|
ret = devm_add_action_or_reset(&client->dev, tsl2591_chip_off,
|
|
indio_dev);
|
|
if (ret < 0)
|
|
return -EINVAL;
|
|
|
|
ret = tsl2591_load_defaults(chip);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "Failed to load sensor defaults\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = i2c_smbus_write_byte(client, TSL2591_CMD_SF_CALS_NPI);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "Failed to clear als irq\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return devm_iio_device_register(&client->dev, indio_dev);
|
|
}
|
|
|
|
static const struct of_device_id tsl2591_of_match[] = {
|
|
{ .compatible = "amstaos,tsl2591"},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, tsl2591_of_match);
|
|
|
|
static struct i2c_driver tsl2591_driver = {
|
|
.driver = {
|
|
.name = "tsl2591",
|
|
.pm = &tsl2591_pm_ops,
|
|
.of_match_table = tsl2591_of_match,
|
|
},
|
|
.probe_new = tsl2591_probe
|
|
};
|
|
module_i2c_driver(tsl2591_driver);
|
|
|
|
MODULE_AUTHOR("Joe Sandom <joe.g.sandom@gmail.com>");
|
|
MODULE_DESCRIPTION("TAOS tsl2591 ambient light sensor driver");
|
|
MODULE_LICENSE("GPL");
|