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1225 lines
32 KiB
1225 lines
32 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (C) 2021 Joe Sandom <[email protected]> |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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return ret; |
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} |
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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. |
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* lux = ((C0DATA - C1DATA) * (1000 - ((C1DATA * 1000) / C0DATA))) / CPL |
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* |
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* Channel 0 = IR + Visible |
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* Channel 1 = IR only |
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*/ |
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static int tsl2591_read_channel_data(struct iio_dev *indio_dev, |
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struct iio_chan_spec const *chan, |
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int *val, int *val2) |
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{ |
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struct tsl2591_chip *chip = iio_priv(indio_dev); |
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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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u8 als_data[TSL2591_NUM_DATA_REGISTERS]; |
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int counts_per_lux, int_time_fval, gain_multi, lux; |
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u16 als_ch0, als_ch1; |
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int ret; |
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|
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ret = tsl2591_wait_adc_complete(chip); |
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if (ret < 0) { |
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dev_err(&client->dev, "No data available. Err: %d\n", ret); |
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return ret; |
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} |
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|
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ret = i2c_smbus_read_i2c_block_data(client, |
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TSL2591_CMD_NOP | TSL2591_C0_DATAL, |
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sizeof(als_data), als_data); |
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if (ret < 0) { |
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dev_err(&client->dev, "Failed to read data bytes"); |
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return ret; |
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} |
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|
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als_ch0 = get_unaligned_le16(&als_data[0]); |
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als_ch1 = get_unaligned_le16(&als_data[2]); |
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|
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switch (chan->type) { |
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case IIO_INTENSITY: |
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if (chan->channel2 == IIO_MOD_LIGHT_BOTH) |
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*val = als_ch0; |
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else if (chan->channel2 == IIO_MOD_LIGHT_IR) |
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*val = als_ch1; |
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else |
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return -EINVAL; |
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break; |
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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 <[email protected]>"); |
|
MODULE_DESCRIPTION("TAOS tsl2591 ambient light sensor driver"); |
|
MODULE_LICENSE("GPL");
|
|
|