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1393 lines
37 KiB
1393 lines
37 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* This file is part of the ROHM BH1770GLC / OSRAM SFH7770 sensor driver. |
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* Chip is combined proximity and ambient light sensor. |
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* |
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* Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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* |
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* Contact: Samu Onkalo <[email protected]> |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/i2c.h> |
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#include <linux/interrupt.h> |
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#include <linux/mutex.h> |
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#include <linux/platform_data/bh1770glc.h> |
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#include <linux/regulator/consumer.h> |
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#include <linux/pm_runtime.h> |
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#include <linux/workqueue.h> |
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#include <linux/delay.h> |
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#include <linux/wait.h> |
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#include <linux/slab.h> |
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#define BH1770_ALS_CONTROL 0x80 /* ALS operation mode control */ |
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#define BH1770_PS_CONTROL 0x81 /* PS operation mode control */ |
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#define BH1770_I_LED 0x82 /* active LED and LED1, LED2 current */ |
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#define BH1770_I_LED3 0x83 /* LED3 current setting */ |
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#define BH1770_ALS_PS_MEAS 0x84 /* Forced mode trigger */ |
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#define BH1770_PS_MEAS_RATE 0x85 /* PS meas. rate at stand alone mode */ |
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#define BH1770_ALS_MEAS_RATE 0x86 /* ALS meas. rate at stand alone mode */ |
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#define BH1770_PART_ID 0x8a /* Part number and revision ID */ |
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#define BH1770_MANUFACT_ID 0x8b /* Manufacturerer ID */ |
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#define BH1770_ALS_DATA_0 0x8c /* ALS DATA low byte */ |
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#define BH1770_ALS_DATA_1 0x8d /* ALS DATA high byte */ |
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#define BH1770_ALS_PS_STATUS 0x8e /* Measurement data and int status */ |
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#define BH1770_PS_DATA_LED1 0x8f /* PS data from LED1 */ |
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#define BH1770_PS_DATA_LED2 0x90 /* PS data from LED2 */ |
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#define BH1770_PS_DATA_LED3 0x91 /* PS data from LED3 */ |
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#define BH1770_INTERRUPT 0x92 /* Interrupt setting */ |
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#define BH1770_PS_TH_LED1 0x93 /* PS interrupt threshold for LED1 */ |
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#define BH1770_PS_TH_LED2 0x94 /* PS interrupt threshold for LED2 */ |
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#define BH1770_PS_TH_LED3 0x95 /* PS interrupt threshold for LED3 */ |
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#define BH1770_ALS_TH_UP_0 0x96 /* ALS upper threshold low byte */ |
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#define BH1770_ALS_TH_UP_1 0x97 /* ALS upper threshold high byte */ |
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#define BH1770_ALS_TH_LOW_0 0x98 /* ALS lower threshold low byte */ |
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#define BH1770_ALS_TH_LOW_1 0x99 /* ALS lower threshold high byte */ |
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/* MANUFACT_ID */ |
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#define BH1770_MANUFACT_ROHM 0x01 |
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#define BH1770_MANUFACT_OSRAM 0x03 |
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|
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/* PART_ID */ |
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#define BH1770_PART 0x90 |
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#define BH1770_PART_MASK 0xf0 |
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#define BH1770_REV_MASK 0x0f |
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#define BH1770_REV_SHIFT 0 |
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#define BH1770_REV_0 0x00 |
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#define BH1770_REV_1 0x01 |
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/* Operating modes for both */ |
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#define BH1770_STANDBY 0x00 |
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#define BH1770_FORCED 0x02 |
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#define BH1770_STANDALONE 0x03 |
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#define BH1770_SWRESET (0x01 << 2) |
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#define BH1770_PS_TRIG_MEAS (1 << 0) |
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#define BH1770_ALS_TRIG_MEAS (1 << 1) |
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/* Interrupt control */ |
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#define BH1770_INT_OUTPUT_MODE (1 << 3) /* 0 = latched */ |
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#define BH1770_INT_POLARITY (1 << 2) /* 1 = active high */ |
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#define BH1770_INT_ALS_ENA (1 << 1) |
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#define BH1770_INT_PS_ENA (1 << 0) |
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/* Interrupt status */ |
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#define BH1770_INT_LED1_DATA (1 << 0) |
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#define BH1770_INT_LED1_INT (1 << 1) |
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#define BH1770_INT_LED2_DATA (1 << 2) |
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#define BH1770_INT_LED2_INT (1 << 3) |
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#define BH1770_INT_LED3_DATA (1 << 4) |
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#define BH1770_INT_LED3_INT (1 << 5) |
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#define BH1770_INT_LEDS_INT ((1 << 1) | (1 << 3) | (1 << 5)) |
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#define BH1770_INT_ALS_DATA (1 << 6) |
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#define BH1770_INT_ALS_INT (1 << 7) |
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/* Led channels */ |
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#define BH1770_LED1 0x00 |
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#define BH1770_DISABLE 0 |
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#define BH1770_ENABLE 1 |
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#define BH1770_PROX_CHANNELS 1 |
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#define BH1770_LUX_DEFAULT_RATE 1 /* Index to lux rate table */ |
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#define BH1770_PROX_DEFAULT_RATE 1 /* Direct HW value =~ 50Hz */ |
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#define BH1770_PROX_DEF_RATE_THRESH 6 /* Direct HW value =~ 5 Hz */ |
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#define BH1770_STARTUP_DELAY 50 |
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#define BH1770_RESET_TIME 10 |
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#define BH1770_TIMEOUT 2100 /* Timeout in 2.1 seconds */ |
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#define BH1770_LUX_RANGE 65535 |
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#define BH1770_PROX_RANGE 255 |
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#define BH1770_COEF_SCALER 1024 |
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#define BH1770_CALIB_SCALER 8192 |
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#define BH1770_LUX_NEUTRAL_CALIB_VALUE (1 * BH1770_CALIB_SCALER) |
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#define BH1770_LUX_DEF_THRES 1000 |
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#define BH1770_PROX_DEF_THRES 70 |
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#define BH1770_PROX_DEF_ABS_THRES 100 |
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#define BH1770_DEFAULT_PERSISTENCE 10 |
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#define BH1770_PROX_MAX_PERSISTENCE 50 |
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#define BH1770_LUX_GA_SCALE 16384 |
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#define BH1770_LUX_CF_SCALE 2048 /* CF ChipFactor */ |
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#define BH1770_NEUTRAL_CF BH1770_LUX_CF_SCALE |
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#define BH1770_LUX_CORR_SCALE 4096 |
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#define PROX_ABOVE_THRESHOLD 1 |
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#define PROX_BELOW_THRESHOLD 0 |
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#define PROX_IGNORE_LUX_LIMIT 500 |
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struct bh1770_chip { |
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struct bh1770_platform_data *pdata; |
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char chipname[10]; |
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u8 revision; |
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struct i2c_client *client; |
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struct regulator_bulk_data regs[2]; |
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struct mutex mutex; /* avoid parallel access */ |
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wait_queue_head_t wait; |
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bool int_mode_prox; |
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bool int_mode_lux; |
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struct delayed_work prox_work; |
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u32 lux_cf; /* Chip specific factor */ |
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u32 lux_ga; |
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u32 lux_calib; |
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int lux_rate_index; |
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u32 lux_corr; |
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u16 lux_data_raw; |
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u16 lux_threshold_hi; |
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u16 lux_threshold_lo; |
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u16 lux_thres_hi_onchip; |
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u16 lux_thres_lo_onchip; |
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bool lux_wait_result; |
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int prox_enable_count; |
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u16 prox_coef; |
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u16 prox_const; |
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int prox_rate; |
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int prox_rate_threshold; |
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u8 prox_persistence; |
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u8 prox_persistence_counter; |
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u8 prox_data; |
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u8 prox_threshold; |
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u8 prox_threshold_hw; |
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bool prox_force_update; |
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u8 prox_abs_thres; |
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u8 prox_led; |
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}; |
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static const char reg_vcc[] = "Vcc"; |
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static const char reg_vleds[] = "Vleds"; |
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/* |
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* Supported stand alone rates in ms from chip data sheet |
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* {10, 20, 30, 40, 70, 100, 200, 500, 1000, 2000}; |
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*/ |
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static const s16 prox_rates_hz[] = {100, 50, 33, 25, 14, 10, 5, 2}; |
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static const s16 prox_rates_ms[] = {10, 20, 30, 40, 70, 100, 200, 500}; |
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/* |
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* Supported stand alone rates in ms from chip data sheet |
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* {100, 200, 500, 1000, 2000}; |
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*/ |
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static const s16 lux_rates_hz[] = {10, 5, 2, 1, 0}; |
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/* |
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* interrupt control functions are called while keeping chip->mutex |
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* excluding module probe / remove |
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*/ |
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static inline int bh1770_lux_interrupt_control(struct bh1770_chip *chip, |
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int lux) |
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{ |
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chip->int_mode_lux = lux; |
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/* Set interrupt modes, interrupt active low, latched */ |
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return i2c_smbus_write_byte_data(chip->client, |
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BH1770_INTERRUPT, |
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(lux << 1) | chip->int_mode_prox); |
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} |
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static inline int bh1770_prox_interrupt_control(struct bh1770_chip *chip, |
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int ps) |
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{ |
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chip->int_mode_prox = ps; |
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return i2c_smbus_write_byte_data(chip->client, |
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BH1770_INTERRUPT, |
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(chip->int_mode_lux << 1) | (ps << 0)); |
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} |
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/* chip->mutex is always kept here */ |
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static int bh1770_lux_rate(struct bh1770_chip *chip, int rate_index) |
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{ |
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/* sysfs may call this when the chip is powered off */ |
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if (pm_runtime_suspended(&chip->client->dev)) |
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return 0; |
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/* Proper proximity response needs fastest lux rate (100ms) */ |
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if (chip->prox_enable_count) |
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rate_index = 0; |
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return i2c_smbus_write_byte_data(chip->client, |
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BH1770_ALS_MEAS_RATE, |
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rate_index); |
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} |
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static int bh1770_prox_rate(struct bh1770_chip *chip, int mode) |
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{ |
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int rate; |
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rate = (mode == PROX_ABOVE_THRESHOLD) ? |
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chip->prox_rate_threshold : chip->prox_rate; |
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return i2c_smbus_write_byte_data(chip->client, |
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BH1770_PS_MEAS_RATE, |
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rate); |
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} |
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/* InfraredLED is controlled by the chip during proximity scanning */ |
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static inline int bh1770_led_cfg(struct bh1770_chip *chip) |
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{ |
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/* LED cfg, current for leds 1 and 2 */ |
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return i2c_smbus_write_byte_data(chip->client, |
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BH1770_I_LED, |
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(BH1770_LED1 << 6) | |
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(BH1770_LED_5mA << 3) | |
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chip->prox_led); |
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} |
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/* |
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* Following two functions converts raw ps values from HW to normalized |
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* values. Purpose is to compensate differences between different sensor |
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* versions and variants so that result means about the same between |
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* versions. |
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*/ |
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static inline u8 bh1770_psraw_to_adjusted(struct bh1770_chip *chip, u8 psraw) |
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{ |
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u16 adjusted; |
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adjusted = (u16)(((u32)(psraw + chip->prox_const) * chip->prox_coef) / |
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BH1770_COEF_SCALER); |
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if (adjusted > BH1770_PROX_RANGE) |
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adjusted = BH1770_PROX_RANGE; |
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return adjusted; |
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} |
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static inline u8 bh1770_psadjusted_to_raw(struct bh1770_chip *chip, u8 ps) |
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{ |
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u16 raw; |
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raw = (((u32)ps * BH1770_COEF_SCALER) / chip->prox_coef); |
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if (raw > chip->prox_const) |
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raw = raw - chip->prox_const; |
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else |
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raw = 0; |
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return raw; |
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} |
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/* |
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* Following two functions converts raw lux values from HW to normalized |
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* values. Purpose is to compensate differences between different sensor |
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* versions and variants so that result means about the same between |
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* versions. Chip->mutex is kept when this is called. |
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*/ |
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static int bh1770_prox_set_threshold(struct bh1770_chip *chip) |
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{ |
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u8 tmp = 0; |
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/* sysfs may call this when the chip is powered off */ |
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if (pm_runtime_suspended(&chip->client->dev)) |
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return 0; |
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tmp = bh1770_psadjusted_to_raw(chip, chip->prox_threshold); |
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chip->prox_threshold_hw = tmp; |
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return i2c_smbus_write_byte_data(chip->client, BH1770_PS_TH_LED1, |
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tmp); |
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} |
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static inline u16 bh1770_lux_raw_to_adjusted(struct bh1770_chip *chip, u16 raw) |
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{ |
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u32 lux; |
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lux = ((u32)raw * chip->lux_corr) / BH1770_LUX_CORR_SCALE; |
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return min(lux, (u32)BH1770_LUX_RANGE); |
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} |
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static inline u16 bh1770_lux_adjusted_to_raw(struct bh1770_chip *chip, |
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u16 adjusted) |
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{ |
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return (u32)adjusted * BH1770_LUX_CORR_SCALE / chip->lux_corr; |
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} |
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/* chip->mutex is kept when this is called */ |
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static int bh1770_lux_update_thresholds(struct bh1770_chip *chip, |
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u16 threshold_hi, u16 threshold_lo) |
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{ |
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u8 data[4]; |
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int ret; |
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/* sysfs may call this when the chip is powered off */ |
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if (pm_runtime_suspended(&chip->client->dev)) |
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return 0; |
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/* |
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* Compensate threshold values with the correction factors if not |
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* set to minimum or maximum. |
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* Min & max values disables interrupts. |
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*/ |
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if (threshold_hi != BH1770_LUX_RANGE && threshold_hi != 0) |
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threshold_hi = bh1770_lux_adjusted_to_raw(chip, threshold_hi); |
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if (threshold_lo != BH1770_LUX_RANGE && threshold_lo != 0) |
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threshold_lo = bh1770_lux_adjusted_to_raw(chip, threshold_lo); |
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if (chip->lux_thres_hi_onchip == threshold_hi && |
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chip->lux_thres_lo_onchip == threshold_lo) |
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return 0; |
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chip->lux_thres_hi_onchip = threshold_hi; |
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chip->lux_thres_lo_onchip = threshold_lo; |
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data[0] = threshold_hi; |
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data[1] = threshold_hi >> 8; |
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data[2] = threshold_lo; |
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data[3] = threshold_lo >> 8; |
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ret = i2c_smbus_write_i2c_block_data(chip->client, |
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BH1770_ALS_TH_UP_0, |
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ARRAY_SIZE(data), |
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data); |
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return ret; |
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} |
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static int bh1770_lux_get_result(struct bh1770_chip *chip) |
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{ |
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u16 data; |
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int ret; |
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ret = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_DATA_0); |
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if (ret < 0) |
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return ret; |
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data = ret & 0xff; |
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ret = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_DATA_1); |
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if (ret < 0) |
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return ret; |
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chip->lux_data_raw = data | ((ret & 0xff) << 8); |
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return 0; |
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} |
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/* Calculate correction value which contains chip and device specific parts */ |
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static u32 bh1770_get_corr_value(struct bh1770_chip *chip) |
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{ |
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u32 tmp; |
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/* Impact of glass attenuation correction */ |
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tmp = (BH1770_LUX_CORR_SCALE * chip->lux_ga) / BH1770_LUX_GA_SCALE; |
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/* Impact of chip factor correction */ |
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tmp = (tmp * chip->lux_cf) / BH1770_LUX_CF_SCALE; |
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/* Impact of Device specific calibration correction */ |
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tmp = (tmp * chip->lux_calib) / BH1770_CALIB_SCALER; |
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return tmp; |
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} |
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static int bh1770_lux_read_result(struct bh1770_chip *chip) |
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{ |
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bh1770_lux_get_result(chip); |
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return bh1770_lux_raw_to_adjusted(chip, chip->lux_data_raw); |
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} |
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/* |
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* Chip on / off functions are called while keeping mutex except probe |
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* or remove phase |
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*/ |
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static int bh1770_chip_on(struct bh1770_chip *chip) |
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{ |
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int ret = regulator_bulk_enable(ARRAY_SIZE(chip->regs), |
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chip->regs); |
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if (ret < 0) |
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return ret; |
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usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2); |
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|
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/* Reset the chip */ |
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i2c_smbus_write_byte_data(chip->client, BH1770_ALS_CONTROL, |
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BH1770_SWRESET); |
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usleep_range(BH1770_RESET_TIME, BH1770_RESET_TIME * 2); |
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/* |
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* ALS is started always since proximity needs als results |
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* for realibility estimation. |
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* Let's assume dark until the first ALS measurement is ready. |
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*/ |
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chip->lux_data_raw = 0; |
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chip->prox_data = 0; |
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ret = i2c_smbus_write_byte_data(chip->client, |
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BH1770_ALS_CONTROL, BH1770_STANDALONE); |
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|
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/* Assume reset defaults */ |
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chip->lux_thres_hi_onchip = BH1770_LUX_RANGE; |
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chip->lux_thres_lo_onchip = 0; |
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|
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return ret; |
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} |
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|
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static void bh1770_chip_off(struct bh1770_chip *chip) |
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{ |
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i2c_smbus_write_byte_data(chip->client, |
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BH1770_INTERRUPT, BH1770_DISABLE); |
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i2c_smbus_write_byte_data(chip->client, |
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BH1770_ALS_CONTROL, BH1770_STANDBY); |
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i2c_smbus_write_byte_data(chip->client, |
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BH1770_PS_CONTROL, BH1770_STANDBY); |
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regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs); |
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} |
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|
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/* chip->mutex is kept when this is called */ |
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static int bh1770_prox_mode_control(struct bh1770_chip *chip) |
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{ |
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if (chip->prox_enable_count) { |
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chip->prox_force_update = true; /* Force immediate update */ |
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|
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bh1770_lux_rate(chip, chip->lux_rate_index); |
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bh1770_prox_set_threshold(chip); |
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bh1770_led_cfg(chip); |
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bh1770_prox_rate(chip, PROX_BELOW_THRESHOLD); |
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bh1770_prox_interrupt_control(chip, BH1770_ENABLE); |
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i2c_smbus_write_byte_data(chip->client, |
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BH1770_PS_CONTROL, BH1770_STANDALONE); |
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} else { |
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chip->prox_data = 0; |
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bh1770_lux_rate(chip, chip->lux_rate_index); |
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bh1770_prox_interrupt_control(chip, BH1770_DISABLE); |
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i2c_smbus_write_byte_data(chip->client, |
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BH1770_PS_CONTROL, BH1770_STANDBY); |
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} |
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return 0; |
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} |
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|
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/* chip->mutex is kept when this is called */ |
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static int bh1770_prox_read_result(struct bh1770_chip *chip) |
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{ |
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int ret; |
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bool above; |
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u8 mode; |
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|
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ret = i2c_smbus_read_byte_data(chip->client, BH1770_PS_DATA_LED1); |
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if (ret < 0) |
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goto out; |
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|
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if (ret > chip->prox_threshold_hw) |
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above = true; |
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else |
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above = false; |
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|
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/* |
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* when ALS levels goes above limit, proximity result may be |
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* false proximity. Thus ignore the result. With real proximity |
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* there is a shadow causing low als levels. |
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*/ |
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if (chip->lux_data_raw > PROX_IGNORE_LUX_LIMIT) |
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ret = 0; |
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|
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chip->prox_data = bh1770_psraw_to_adjusted(chip, ret); |
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|
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/* Strong proximity level or force mode requires immediate response */ |
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if (chip->prox_data >= chip->prox_abs_thres || |
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chip->prox_force_update) |
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chip->prox_persistence_counter = chip->prox_persistence; |
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|
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chip->prox_force_update = false; |
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|
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/* Persistence filttering to reduce false proximity events */ |
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if (likely(above)) { |
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if (chip->prox_persistence_counter < chip->prox_persistence) { |
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chip->prox_persistence_counter++; |
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ret = -ENODATA; |
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} else { |
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mode = PROX_ABOVE_THRESHOLD; |
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ret = 0; |
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} |
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} else { |
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chip->prox_persistence_counter = 0; |
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mode = PROX_BELOW_THRESHOLD; |
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chip->prox_data = 0; |
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ret = 0; |
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} |
|
|
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/* Set proximity detection rate based on above or below value */ |
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if (ret == 0) { |
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bh1770_prox_rate(chip, mode); |
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sysfs_notify(&chip->client->dev.kobj, NULL, "prox0_raw"); |
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} |
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out: |
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return ret; |
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} |
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|
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static int bh1770_detect(struct bh1770_chip *chip) |
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{ |
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struct i2c_client *client = chip->client; |
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s32 ret; |
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u8 manu, part; |
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|
|
ret = i2c_smbus_read_byte_data(client, BH1770_MANUFACT_ID); |
|
if (ret < 0) |
|
goto error; |
|
manu = (u8)ret; |
|
|
|
ret = i2c_smbus_read_byte_data(client, BH1770_PART_ID); |
|
if (ret < 0) |
|
goto error; |
|
part = (u8)ret; |
|
|
|
chip->revision = (part & BH1770_REV_MASK) >> BH1770_REV_SHIFT; |
|
chip->prox_coef = BH1770_COEF_SCALER; |
|
chip->prox_const = 0; |
|
chip->lux_cf = BH1770_NEUTRAL_CF; |
|
|
|
if ((manu == BH1770_MANUFACT_ROHM) && |
|
((part & BH1770_PART_MASK) == BH1770_PART)) { |
|
snprintf(chip->chipname, sizeof(chip->chipname), "BH1770GLC"); |
|
return 0; |
|
} |
|
|
|
if ((manu == BH1770_MANUFACT_OSRAM) && |
|
((part & BH1770_PART_MASK) == BH1770_PART)) { |
|
snprintf(chip->chipname, sizeof(chip->chipname), "SFH7770"); |
|
/* Values selected by comparing different versions */ |
|
chip->prox_coef = 819; /* 0.8 * BH1770_COEF_SCALER */ |
|
chip->prox_const = 40; |
|
return 0; |
|
} |
|
|
|
ret = -ENODEV; |
|
error: |
|
dev_dbg(&client->dev, "BH1770 or SFH7770 not found\n"); |
|
|
|
return ret; |
|
} |
|
|
|
/* |
|
* This work is re-scheduled at every proximity interrupt. |
|
* If this work is running, it means that there hasn't been any |
|
* proximity interrupt in time. Situation is handled as no-proximity. |
|
* It would be nice to have low-threshold interrupt or interrupt |
|
* when measurement and hi-threshold are both 0. But neither of those exists. |
|
* This is a workaroud for missing HW feature. |
|
*/ |
|
|
|
static void bh1770_prox_work(struct work_struct *work) |
|
{ |
|
struct bh1770_chip *chip = |
|
container_of(work, struct bh1770_chip, prox_work.work); |
|
|
|
mutex_lock(&chip->mutex); |
|
bh1770_prox_read_result(chip); |
|
mutex_unlock(&chip->mutex); |
|
} |
|
|
|
/* This is threaded irq handler */ |
|
static irqreturn_t bh1770_irq(int irq, void *data) |
|
{ |
|
struct bh1770_chip *chip = data; |
|
int status; |
|
int rate = 0; |
|
|
|
mutex_lock(&chip->mutex); |
|
status = i2c_smbus_read_byte_data(chip->client, BH1770_ALS_PS_STATUS); |
|
|
|
/* Acknowledge interrupt by reading this register */ |
|
i2c_smbus_read_byte_data(chip->client, BH1770_INTERRUPT); |
|
|
|
/* |
|
* Check if there is fresh data available for als. |
|
* If this is the very first data, update thresholds after that. |
|
*/ |
|
if (status & BH1770_INT_ALS_DATA) { |
|
bh1770_lux_get_result(chip); |
|
if (unlikely(chip->lux_wait_result)) { |
|
chip->lux_wait_result = false; |
|
wake_up(&chip->wait); |
|
bh1770_lux_update_thresholds(chip, |
|
chip->lux_threshold_hi, |
|
chip->lux_threshold_lo); |
|
} |
|
} |
|
|
|
/* Disable interrupt logic to guarantee acknowledgement */ |
|
i2c_smbus_write_byte_data(chip->client, BH1770_INTERRUPT, |
|
(0 << 1) | (0 << 0)); |
|
|
|
if ((status & BH1770_INT_ALS_INT)) |
|
sysfs_notify(&chip->client->dev.kobj, NULL, "lux0_input"); |
|
|
|
if (chip->int_mode_prox && (status & BH1770_INT_LEDS_INT)) { |
|
rate = prox_rates_ms[chip->prox_rate_threshold]; |
|
bh1770_prox_read_result(chip); |
|
} |
|
|
|
/* Re-enable interrupt logic */ |
|
i2c_smbus_write_byte_data(chip->client, BH1770_INTERRUPT, |
|
(chip->int_mode_lux << 1) | |
|
(chip->int_mode_prox << 0)); |
|
mutex_unlock(&chip->mutex); |
|
|
|
/* |
|
* Can't cancel work while keeping mutex since the work uses the |
|
* same mutex. |
|
*/ |
|
if (rate) { |
|
/* |
|
* Simulate missing no-proximity interrupt 50ms after the |
|
* next expected interrupt time. |
|
*/ |
|
cancel_delayed_work_sync(&chip->prox_work); |
|
schedule_delayed_work(&chip->prox_work, |
|
msecs_to_jiffies(rate + 50)); |
|
} |
|
return IRQ_HANDLED; |
|
} |
|
|
|
static ssize_t bh1770_power_state_store(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
unsigned long value; |
|
ssize_t ret; |
|
|
|
ret = kstrtoul(buf, 0, &value); |
|
if (ret) |
|
return ret; |
|
|
|
mutex_lock(&chip->mutex); |
|
if (value) { |
|
pm_runtime_get_sync(dev); |
|
|
|
ret = bh1770_lux_rate(chip, chip->lux_rate_index); |
|
if (ret < 0) { |
|
pm_runtime_put(dev); |
|
goto leave; |
|
} |
|
|
|
ret = bh1770_lux_interrupt_control(chip, BH1770_ENABLE); |
|
if (ret < 0) { |
|
pm_runtime_put(dev); |
|
goto leave; |
|
} |
|
|
|
/* This causes interrupt after the next measurement cycle */ |
|
bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES, |
|
BH1770_LUX_DEF_THRES); |
|
/* Inform that we are waiting for a result from ALS */ |
|
chip->lux_wait_result = true; |
|
bh1770_prox_mode_control(chip); |
|
} else if (!pm_runtime_suspended(dev)) { |
|
pm_runtime_put(dev); |
|
} |
|
ret = count; |
|
leave: |
|
mutex_unlock(&chip->mutex); |
|
return ret; |
|
} |
|
|
|
static ssize_t bh1770_power_state_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
return sprintf(buf, "%d\n", !pm_runtime_suspended(dev)); |
|
} |
|
|
|
static ssize_t bh1770_lux_result_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
ssize_t ret; |
|
long timeout; |
|
|
|
if (pm_runtime_suspended(dev)) |
|
return -EIO; /* Chip is not enabled at all */ |
|
|
|
timeout = wait_event_interruptible_timeout(chip->wait, |
|
!chip->lux_wait_result, |
|
msecs_to_jiffies(BH1770_TIMEOUT)); |
|
if (!timeout) |
|
return -EIO; |
|
|
|
mutex_lock(&chip->mutex); |
|
ret = sprintf(buf, "%d\n", bh1770_lux_read_result(chip)); |
|
mutex_unlock(&chip->mutex); |
|
|
|
return ret; |
|
} |
|
|
|
static ssize_t bh1770_lux_range_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
return sprintf(buf, "%d\n", BH1770_LUX_RANGE); |
|
} |
|
|
|
static ssize_t bh1770_prox_enable_store(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
unsigned long value; |
|
int ret; |
|
|
|
ret = kstrtoul(buf, 0, &value); |
|
if (ret) |
|
return ret; |
|
|
|
mutex_lock(&chip->mutex); |
|
/* Assume no proximity. Sensor will tell real state soon */ |
|
if (!chip->prox_enable_count) |
|
chip->prox_data = 0; |
|
|
|
if (value) |
|
chip->prox_enable_count++; |
|
else if (chip->prox_enable_count > 0) |
|
chip->prox_enable_count--; |
|
else |
|
goto leave; |
|
|
|
/* Run control only when chip is powered on */ |
|
if (!pm_runtime_suspended(dev)) |
|
bh1770_prox_mode_control(chip); |
|
leave: |
|
mutex_unlock(&chip->mutex); |
|
return count; |
|
} |
|
|
|
static ssize_t bh1770_prox_enable_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
ssize_t len; |
|
|
|
mutex_lock(&chip->mutex); |
|
len = sprintf(buf, "%d\n", chip->prox_enable_count); |
|
mutex_unlock(&chip->mutex); |
|
return len; |
|
} |
|
|
|
static ssize_t bh1770_prox_result_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
ssize_t ret; |
|
|
|
mutex_lock(&chip->mutex); |
|
if (chip->prox_enable_count && !pm_runtime_suspended(dev)) |
|
ret = sprintf(buf, "%d\n", chip->prox_data); |
|
else |
|
ret = -EIO; |
|
mutex_unlock(&chip->mutex); |
|
return ret; |
|
} |
|
|
|
static ssize_t bh1770_prox_range_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
return sprintf(buf, "%d\n", BH1770_PROX_RANGE); |
|
} |
|
|
|
static ssize_t bh1770_get_prox_rate_avail(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
int i; |
|
int pos = 0; |
|
for (i = 0; i < ARRAY_SIZE(prox_rates_hz); i++) |
|
pos += sprintf(buf + pos, "%d ", prox_rates_hz[i]); |
|
sprintf(buf + pos - 1, "\n"); |
|
return pos; |
|
} |
|
|
|
static ssize_t bh1770_get_prox_rate_above(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate_threshold]); |
|
} |
|
|
|
static ssize_t bh1770_get_prox_rate_below(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate]); |
|
} |
|
|
|
static int bh1770_prox_rate_validate(int rate) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < ARRAY_SIZE(prox_rates_hz) - 1; i++) |
|
if (rate >= prox_rates_hz[i]) |
|
break; |
|
return i; |
|
} |
|
|
|
static ssize_t bh1770_set_prox_rate_above(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
unsigned long value; |
|
int ret; |
|
|
|
ret = kstrtoul(buf, 0, &value); |
|
if (ret) |
|
return ret; |
|
|
|
mutex_lock(&chip->mutex); |
|
chip->prox_rate_threshold = bh1770_prox_rate_validate(value); |
|
mutex_unlock(&chip->mutex); |
|
return count; |
|
} |
|
|
|
static ssize_t bh1770_set_prox_rate_below(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
unsigned long value; |
|
int ret; |
|
|
|
ret = kstrtoul(buf, 0, &value); |
|
if (ret) |
|
return ret; |
|
|
|
mutex_lock(&chip->mutex); |
|
chip->prox_rate = bh1770_prox_rate_validate(value); |
|
mutex_unlock(&chip->mutex); |
|
return count; |
|
} |
|
|
|
static ssize_t bh1770_get_prox_thres(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
return sprintf(buf, "%d\n", chip->prox_threshold); |
|
} |
|
|
|
static ssize_t bh1770_set_prox_thres(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
unsigned long value; |
|
int ret; |
|
|
|
ret = kstrtoul(buf, 0, &value); |
|
if (ret) |
|
return ret; |
|
|
|
if (value > BH1770_PROX_RANGE) |
|
return -EINVAL; |
|
|
|
mutex_lock(&chip->mutex); |
|
chip->prox_threshold = value; |
|
ret = bh1770_prox_set_threshold(chip); |
|
mutex_unlock(&chip->mutex); |
|
if (ret < 0) |
|
return ret; |
|
return count; |
|
} |
|
|
|
static ssize_t bh1770_prox_persistence_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
|
|
return sprintf(buf, "%u\n", chip->prox_persistence); |
|
} |
|
|
|
static ssize_t bh1770_prox_persistence_store(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t len) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
unsigned long value; |
|
int ret; |
|
|
|
ret = kstrtoul(buf, 0, &value); |
|
if (ret) |
|
return ret; |
|
|
|
if (value > BH1770_PROX_MAX_PERSISTENCE) |
|
return -EINVAL; |
|
|
|
chip->prox_persistence = value; |
|
|
|
return len; |
|
} |
|
|
|
static ssize_t bh1770_prox_abs_thres_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
return sprintf(buf, "%u\n", chip->prox_abs_thres); |
|
} |
|
|
|
static ssize_t bh1770_prox_abs_thres_store(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t len) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
unsigned long value; |
|
int ret; |
|
|
|
ret = kstrtoul(buf, 0, &value); |
|
if (ret) |
|
return ret; |
|
|
|
if (value > BH1770_PROX_RANGE) |
|
return -EINVAL; |
|
|
|
chip->prox_abs_thres = value; |
|
|
|
return len; |
|
} |
|
|
|
static ssize_t bh1770_chip_id_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
return sprintf(buf, "%s rev %d\n", chip->chipname, chip->revision); |
|
} |
|
|
|
static ssize_t bh1770_lux_calib_default_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
return sprintf(buf, "%u\n", BH1770_CALIB_SCALER); |
|
} |
|
|
|
static ssize_t bh1770_lux_calib_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
ssize_t len; |
|
|
|
mutex_lock(&chip->mutex); |
|
len = sprintf(buf, "%u\n", chip->lux_calib); |
|
mutex_unlock(&chip->mutex); |
|
return len; |
|
} |
|
|
|
static ssize_t bh1770_lux_calib_store(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t len) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
unsigned long value; |
|
u32 old_calib; |
|
u32 new_corr; |
|
int ret; |
|
|
|
ret = kstrtoul(buf, 0, &value); |
|
if (ret) |
|
return ret; |
|
|
|
mutex_lock(&chip->mutex); |
|
old_calib = chip->lux_calib; |
|
chip->lux_calib = value; |
|
new_corr = bh1770_get_corr_value(chip); |
|
if (new_corr == 0) { |
|
chip->lux_calib = old_calib; |
|
mutex_unlock(&chip->mutex); |
|
return -EINVAL; |
|
} |
|
chip->lux_corr = new_corr; |
|
/* Refresh thresholds on HW after changing correction value */ |
|
bh1770_lux_update_thresholds(chip, chip->lux_threshold_hi, |
|
chip->lux_threshold_lo); |
|
|
|
mutex_unlock(&chip->mutex); |
|
|
|
return len; |
|
} |
|
|
|
static ssize_t bh1770_get_lux_rate_avail(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
int i; |
|
int pos = 0; |
|
for (i = 0; i < ARRAY_SIZE(lux_rates_hz); i++) |
|
pos += sprintf(buf + pos, "%d ", lux_rates_hz[i]); |
|
sprintf(buf + pos - 1, "\n"); |
|
return pos; |
|
} |
|
|
|
static ssize_t bh1770_get_lux_rate(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
return sprintf(buf, "%d\n", lux_rates_hz[chip->lux_rate_index]); |
|
} |
|
|
|
static ssize_t bh1770_set_lux_rate(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
unsigned long rate_hz; |
|
int ret, i; |
|
|
|
ret = kstrtoul(buf, 0, &rate_hz); |
|
if (ret) |
|
return ret; |
|
|
|
for (i = 0; i < ARRAY_SIZE(lux_rates_hz) - 1; i++) |
|
if (rate_hz >= lux_rates_hz[i]) |
|
break; |
|
|
|
mutex_lock(&chip->mutex); |
|
chip->lux_rate_index = i; |
|
ret = bh1770_lux_rate(chip, i); |
|
mutex_unlock(&chip->mutex); |
|
|
|
if (ret < 0) |
|
return ret; |
|
|
|
return count; |
|
} |
|
|
|
static ssize_t bh1770_get_lux_thresh_above(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
return sprintf(buf, "%d\n", chip->lux_threshold_hi); |
|
} |
|
|
|
static ssize_t bh1770_get_lux_thresh_below(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
return sprintf(buf, "%d\n", chip->lux_threshold_lo); |
|
} |
|
|
|
static ssize_t bh1770_set_lux_thresh(struct bh1770_chip *chip, u16 *target, |
|
const char *buf) |
|
{ |
|
unsigned long thresh; |
|
int ret; |
|
|
|
ret = kstrtoul(buf, 0, &thresh); |
|
if (ret) |
|
return ret; |
|
|
|
if (thresh > BH1770_LUX_RANGE) |
|
return -EINVAL; |
|
|
|
mutex_lock(&chip->mutex); |
|
*target = thresh; |
|
/* |
|
* Don't update values in HW if we are still waiting for |
|
* first interrupt to come after device handle open call. |
|
*/ |
|
if (!chip->lux_wait_result) |
|
ret = bh1770_lux_update_thresholds(chip, |
|
chip->lux_threshold_hi, |
|
chip->lux_threshold_lo); |
|
mutex_unlock(&chip->mutex); |
|
return ret; |
|
|
|
} |
|
|
|
static ssize_t bh1770_set_lux_thresh_above(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t len) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
int ret = bh1770_set_lux_thresh(chip, &chip->lux_threshold_hi, buf); |
|
if (ret < 0) |
|
return ret; |
|
return len; |
|
} |
|
|
|
static ssize_t bh1770_set_lux_thresh_below(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t len) |
|
{ |
|
struct bh1770_chip *chip = dev_get_drvdata(dev); |
|
int ret = bh1770_set_lux_thresh(chip, &chip->lux_threshold_lo, buf); |
|
if (ret < 0) |
|
return ret; |
|
return len; |
|
} |
|
|
|
static DEVICE_ATTR(prox0_raw_en, S_IRUGO | S_IWUSR, bh1770_prox_enable_show, |
|
bh1770_prox_enable_store); |
|
static DEVICE_ATTR(prox0_thresh_above1_value, S_IRUGO | S_IWUSR, |
|
bh1770_prox_abs_thres_show, |
|
bh1770_prox_abs_thres_store); |
|
static DEVICE_ATTR(prox0_thresh_above0_value, S_IRUGO | S_IWUSR, |
|
bh1770_get_prox_thres, |
|
bh1770_set_prox_thres); |
|
static DEVICE_ATTR(prox0_raw, S_IRUGO, bh1770_prox_result_show, NULL); |
|
static DEVICE_ATTR(prox0_sensor_range, S_IRUGO, bh1770_prox_range_show, NULL); |
|
static DEVICE_ATTR(prox0_thresh_above_count, S_IRUGO | S_IWUSR, |
|
bh1770_prox_persistence_show, |
|
bh1770_prox_persistence_store); |
|
static DEVICE_ATTR(prox0_rate_above, S_IRUGO | S_IWUSR, |
|
bh1770_get_prox_rate_above, |
|
bh1770_set_prox_rate_above); |
|
static DEVICE_ATTR(prox0_rate_below, S_IRUGO | S_IWUSR, |
|
bh1770_get_prox_rate_below, |
|
bh1770_set_prox_rate_below); |
|
static DEVICE_ATTR(prox0_rate_avail, S_IRUGO, bh1770_get_prox_rate_avail, NULL); |
|
|
|
static DEVICE_ATTR(lux0_calibscale, S_IRUGO | S_IWUSR, bh1770_lux_calib_show, |
|
bh1770_lux_calib_store); |
|
static DEVICE_ATTR(lux0_calibscale_default, S_IRUGO, |
|
bh1770_lux_calib_default_show, |
|
NULL); |
|
static DEVICE_ATTR(lux0_input, S_IRUGO, bh1770_lux_result_show, NULL); |
|
static DEVICE_ATTR(lux0_sensor_range, S_IRUGO, bh1770_lux_range_show, NULL); |
|
static DEVICE_ATTR(lux0_rate, S_IRUGO | S_IWUSR, bh1770_get_lux_rate, |
|
bh1770_set_lux_rate); |
|
static DEVICE_ATTR(lux0_rate_avail, S_IRUGO, bh1770_get_lux_rate_avail, NULL); |
|
static DEVICE_ATTR(lux0_thresh_above_value, S_IRUGO | S_IWUSR, |
|
bh1770_get_lux_thresh_above, |
|
bh1770_set_lux_thresh_above); |
|
static DEVICE_ATTR(lux0_thresh_below_value, S_IRUGO | S_IWUSR, |
|
bh1770_get_lux_thresh_below, |
|
bh1770_set_lux_thresh_below); |
|
static DEVICE_ATTR(chip_id, S_IRUGO, bh1770_chip_id_show, NULL); |
|
static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, bh1770_power_state_show, |
|
bh1770_power_state_store); |
|
|
|
|
|
static struct attribute *sysfs_attrs[] = { |
|
&dev_attr_lux0_calibscale.attr, |
|
&dev_attr_lux0_calibscale_default.attr, |
|
&dev_attr_lux0_input.attr, |
|
&dev_attr_lux0_sensor_range.attr, |
|
&dev_attr_lux0_rate.attr, |
|
&dev_attr_lux0_rate_avail.attr, |
|
&dev_attr_lux0_thresh_above_value.attr, |
|
&dev_attr_lux0_thresh_below_value.attr, |
|
&dev_attr_prox0_raw.attr, |
|
&dev_attr_prox0_sensor_range.attr, |
|
&dev_attr_prox0_raw_en.attr, |
|
&dev_attr_prox0_thresh_above_count.attr, |
|
&dev_attr_prox0_rate_above.attr, |
|
&dev_attr_prox0_rate_below.attr, |
|
&dev_attr_prox0_rate_avail.attr, |
|
&dev_attr_prox0_thresh_above0_value.attr, |
|
&dev_attr_prox0_thresh_above1_value.attr, |
|
&dev_attr_chip_id.attr, |
|
&dev_attr_power_state.attr, |
|
NULL |
|
}; |
|
|
|
static const struct attribute_group bh1770_attribute_group = { |
|
.attrs = sysfs_attrs |
|
}; |
|
|
|
static int bh1770_probe(struct i2c_client *client, |
|
const struct i2c_device_id *id) |
|
{ |
|
struct bh1770_chip *chip; |
|
int err; |
|
|
|
chip = devm_kzalloc(&client->dev, sizeof *chip, GFP_KERNEL); |
|
if (!chip) |
|
return -ENOMEM; |
|
|
|
i2c_set_clientdata(client, chip); |
|
chip->client = client; |
|
|
|
mutex_init(&chip->mutex); |
|
init_waitqueue_head(&chip->wait); |
|
INIT_DELAYED_WORK(&chip->prox_work, bh1770_prox_work); |
|
|
|
if (client->dev.platform_data == NULL) { |
|
dev_err(&client->dev, "platform data is mandatory\n"); |
|
return -EINVAL; |
|
} |
|
|
|
chip->pdata = client->dev.platform_data; |
|
chip->lux_calib = BH1770_LUX_NEUTRAL_CALIB_VALUE; |
|
chip->lux_rate_index = BH1770_LUX_DEFAULT_RATE; |
|
chip->lux_threshold_lo = BH1770_LUX_DEF_THRES; |
|
chip->lux_threshold_hi = BH1770_LUX_DEF_THRES; |
|
|
|
if (chip->pdata->glass_attenuation == 0) |
|
chip->lux_ga = BH1770_NEUTRAL_GA; |
|
else |
|
chip->lux_ga = chip->pdata->glass_attenuation; |
|
|
|
chip->prox_threshold = BH1770_PROX_DEF_THRES; |
|
chip->prox_led = chip->pdata->led_def_curr; |
|
chip->prox_abs_thres = BH1770_PROX_DEF_ABS_THRES; |
|
chip->prox_persistence = BH1770_DEFAULT_PERSISTENCE; |
|
chip->prox_rate_threshold = BH1770_PROX_DEF_RATE_THRESH; |
|
chip->prox_rate = BH1770_PROX_DEFAULT_RATE; |
|
chip->prox_data = 0; |
|
|
|
chip->regs[0].supply = reg_vcc; |
|
chip->regs[1].supply = reg_vleds; |
|
|
|
err = devm_regulator_bulk_get(&client->dev, |
|
ARRAY_SIZE(chip->regs), chip->regs); |
|
if (err < 0) { |
|
dev_err(&client->dev, "Cannot get regulators\n"); |
|
return err; |
|
} |
|
|
|
err = regulator_bulk_enable(ARRAY_SIZE(chip->regs), |
|
chip->regs); |
|
if (err < 0) { |
|
dev_err(&client->dev, "Cannot enable regulators\n"); |
|
return err; |
|
} |
|
|
|
usleep_range(BH1770_STARTUP_DELAY, BH1770_STARTUP_DELAY * 2); |
|
err = bh1770_detect(chip); |
|
if (err < 0) |
|
goto fail0; |
|
|
|
/* Start chip */ |
|
bh1770_chip_on(chip); |
|
pm_runtime_set_active(&client->dev); |
|
pm_runtime_enable(&client->dev); |
|
|
|
chip->lux_corr = bh1770_get_corr_value(chip); |
|
if (chip->lux_corr == 0) { |
|
dev_err(&client->dev, "Improper correction values\n"); |
|
err = -EINVAL; |
|
goto fail0; |
|
} |
|
|
|
if (chip->pdata->setup_resources) { |
|
err = chip->pdata->setup_resources(); |
|
if (err) { |
|
err = -EINVAL; |
|
goto fail0; |
|
} |
|
} |
|
|
|
err = sysfs_create_group(&chip->client->dev.kobj, |
|
&bh1770_attribute_group); |
|
if (err < 0) { |
|
dev_err(&chip->client->dev, "Sysfs registration failed\n"); |
|
goto fail1; |
|
} |
|
|
|
/* |
|
* Chip needs level triggered interrupt to work. However, |
|
* level triggering doesn't work always correctly with power |
|
* management. Select both |
|
*/ |
|
err = request_threaded_irq(client->irq, NULL, |
|
bh1770_irq, |
|
IRQF_TRIGGER_FALLING | IRQF_ONESHOT | |
|
IRQF_TRIGGER_LOW, |
|
"bh1770", chip); |
|
if (err) { |
|
dev_err(&client->dev, "could not get IRQ %d\n", |
|
client->irq); |
|
goto fail2; |
|
} |
|
regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs); |
|
return err; |
|
fail2: |
|
sysfs_remove_group(&chip->client->dev.kobj, |
|
&bh1770_attribute_group); |
|
fail1: |
|
if (chip->pdata->release_resources) |
|
chip->pdata->release_resources(); |
|
fail0: |
|
regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs); |
|
return err; |
|
} |
|
|
|
static int bh1770_remove(struct i2c_client *client) |
|
{ |
|
struct bh1770_chip *chip = i2c_get_clientdata(client); |
|
|
|
free_irq(client->irq, chip); |
|
|
|
sysfs_remove_group(&chip->client->dev.kobj, |
|
&bh1770_attribute_group); |
|
|
|
if (chip->pdata->release_resources) |
|
chip->pdata->release_resources(); |
|
|
|
cancel_delayed_work_sync(&chip->prox_work); |
|
|
|
if (!pm_runtime_suspended(&client->dev)) |
|
bh1770_chip_off(chip); |
|
|
|
pm_runtime_disable(&client->dev); |
|
pm_runtime_set_suspended(&client->dev); |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_PM_SLEEP |
|
static int bh1770_suspend(struct device *dev) |
|
{ |
|
struct i2c_client *client = to_i2c_client(dev); |
|
struct bh1770_chip *chip = i2c_get_clientdata(client); |
|
|
|
bh1770_chip_off(chip); |
|
|
|
return 0; |
|
} |
|
|
|
static int bh1770_resume(struct device *dev) |
|
{ |
|
struct i2c_client *client = to_i2c_client(dev); |
|
struct bh1770_chip *chip = i2c_get_clientdata(client); |
|
int ret = 0; |
|
|
|
bh1770_chip_on(chip); |
|
|
|
if (!pm_runtime_suspended(dev)) { |
|
/* |
|
* If we were enabled at suspend time, it is expected |
|
* everything works nice and smoothly |
|
*/ |
|
ret = bh1770_lux_rate(chip, chip->lux_rate_index); |
|
ret |= bh1770_lux_interrupt_control(chip, BH1770_ENABLE); |
|
|
|
/* This causes interrupt after the next measurement cycle */ |
|
bh1770_lux_update_thresholds(chip, BH1770_LUX_DEF_THRES, |
|
BH1770_LUX_DEF_THRES); |
|
/* Inform that we are waiting for a result from ALS */ |
|
chip->lux_wait_result = true; |
|
bh1770_prox_mode_control(chip); |
|
} |
|
return ret; |
|
} |
|
#endif |
|
|
|
#ifdef CONFIG_PM |
|
static int bh1770_runtime_suspend(struct device *dev) |
|
{ |
|
struct i2c_client *client = to_i2c_client(dev); |
|
struct bh1770_chip *chip = i2c_get_clientdata(client); |
|
|
|
bh1770_chip_off(chip); |
|
|
|
return 0; |
|
} |
|
|
|
static int bh1770_runtime_resume(struct device *dev) |
|
{ |
|
struct i2c_client *client = to_i2c_client(dev); |
|
struct bh1770_chip *chip = i2c_get_clientdata(client); |
|
|
|
bh1770_chip_on(chip); |
|
|
|
return 0; |
|
} |
|
#endif |
|
|
|
static const struct i2c_device_id bh1770_id[] = { |
|
{"bh1770glc", 0 }, |
|
{"sfh7770", 0 }, |
|
{} |
|
}; |
|
|
|
MODULE_DEVICE_TABLE(i2c, bh1770_id); |
|
|
|
static const struct dev_pm_ops bh1770_pm_ops = { |
|
SET_SYSTEM_SLEEP_PM_OPS(bh1770_suspend, bh1770_resume) |
|
SET_RUNTIME_PM_OPS(bh1770_runtime_suspend, bh1770_runtime_resume, NULL) |
|
}; |
|
|
|
static struct i2c_driver bh1770_driver = { |
|
.driver = { |
|
.name = "bh1770glc", |
|
.pm = &bh1770_pm_ops, |
|
}, |
|
.probe = bh1770_probe, |
|
.remove = bh1770_remove, |
|
.id_table = bh1770_id, |
|
}; |
|
|
|
module_i2c_driver(bh1770_driver); |
|
|
|
MODULE_DESCRIPTION("BH1770GLC / SFH7770 combined ALS and proximity sensor"); |
|
MODULE_AUTHOR("Samu Onkalo, Nokia Corporation"); |
|
MODULE_LICENSE("GPL v2");
|
|
|