+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * This file is part of the APDS990x sensor driver.
- * Chip is combined proximity and ambient light sensor.
- *
- * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
- *
- * Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/i2c.h>
-#include <linux/interrupt.h>
-#include <linux/mutex.h>
-#include <linux/regulator/consumer.h>
-#include <linux/pm_runtime.h>
-#include <linux/delay.h>
-#include <linux/wait.h>
-#include <linux/slab.h>
-#include <linux/platform_data/apds990x.h>
-
-/* Register map */
-#define APDS990X_ENABLE 0x00 /* Enable of states and interrupts */
-#define APDS990X_ATIME 0x01 /* ALS ADC time */
-#define APDS990X_PTIME 0x02 /* Proximity ADC time */
-#define APDS990X_WTIME 0x03 /* Wait time */
-#define APDS990X_AILTL 0x04 /* ALS interrupt low threshold low byte */
-#define APDS990X_AILTH 0x05 /* ALS interrupt low threshold hi byte */
-#define APDS990X_AIHTL 0x06 /* ALS interrupt hi threshold low byte */
-#define APDS990X_AIHTH 0x07 /* ALS interrupt hi threshold hi byte */
-#define APDS990X_PILTL 0x08 /* Proximity interrupt low threshold low byte */
-#define APDS990X_PILTH 0x09 /* Proximity interrupt low threshold hi byte */
-#define APDS990X_PIHTL 0x0a /* Proximity interrupt hi threshold low byte */
-#define APDS990X_PIHTH 0x0b /* Proximity interrupt hi threshold hi byte */
-#define APDS990X_PERS 0x0c /* Interrupt persistence filters */
-#define APDS990X_CONFIG 0x0d /* Configuration */
-#define APDS990X_PPCOUNT 0x0e /* Proximity pulse count */
-#define APDS990X_CONTROL 0x0f /* Gain control register */
-#define APDS990X_REV 0x11 /* Revision Number */
-#define APDS990X_ID 0x12 /* Device ID */
-#define APDS990X_STATUS 0x13 /* Device status */
-#define APDS990X_CDATAL 0x14 /* Clear ADC low data register */
-#define APDS990X_CDATAH 0x15 /* Clear ADC high data register */
-#define APDS990X_IRDATAL 0x16 /* IR ADC low data register */
-#define APDS990X_IRDATAH 0x17 /* IR ADC high data register */
-#define APDS990X_PDATAL 0x18 /* Proximity ADC low data register */
-#define APDS990X_PDATAH 0x19 /* Proximity ADC high data register */
-
-/* Control */
-#define APDS990X_MAX_AGAIN 3
-
-/* Enable register */
-#define APDS990X_EN_PIEN (0x1 << 5)
-#define APDS990X_EN_AIEN (0x1 << 4)
-#define APDS990X_EN_WEN (0x1 << 3)
-#define APDS990X_EN_PEN (0x1 << 2)
-#define APDS990X_EN_AEN (0x1 << 1)
-#define APDS990X_EN_PON (0x1 << 0)
-#define APDS990X_EN_DISABLE_ALL 0
-
-/* Status register */
-#define APDS990X_ST_PINT (0x1 << 5)
-#define APDS990X_ST_AINT (0x1 << 4)
-
-/* I2C access types */
-#define APDS990x_CMD_TYPE_MASK (0x03 << 5)
-#define APDS990x_CMD_TYPE_RB (0x00 << 5) /* Repeated byte */
-#define APDS990x_CMD_TYPE_INC (0x01 << 5) /* Auto increment */
-#define APDS990x_CMD_TYPE_SPE (0x03 << 5) /* Special function */
-
-#define APDS990x_ADDR_SHIFT 0
-#define APDS990x_CMD 0x80
-
-/* Interrupt ack commands */
-#define APDS990X_INT_ACK_ALS 0x6
-#define APDS990X_INT_ACK_PS 0x5
-#define APDS990X_INT_ACK_BOTH 0x7
-
-/* ptime */
-#define APDS990X_PTIME_DEFAULT 0xff /* Recommended conversion time 2.7ms*/
-
-/* wtime */
-#define APDS990X_WTIME_DEFAULT 0xee /* ~50ms wait time */
-
-#define APDS990X_TIME_TO_ADC 1024 /* One timetick as ADC count value */
-
-/* Persistence */
-#define APDS990X_APERS_SHIFT 0
-#define APDS990X_PPERS_SHIFT 4
-
-/* Supported ID:s */
-#define APDS990X_ID_0 0x0
-#define APDS990X_ID_4 0x4
-#define APDS990X_ID_29 0x29
-
-/* pgain and pdiode settings */
-#define APDS_PGAIN_1X 0x0
-#define APDS_PDIODE_IR 0x2
-
-#define APDS990X_LUX_OUTPUT_SCALE 10
-
-/* Reverse chip factors for threshold calculation */
-struct reverse_factors {
- u32 afactor;
- int cf1;
- int irf1;
- int cf2;
- int irf2;
-};
-
-struct apds990x_chip {
- struct apds990x_platform_data *pdata;
- struct i2c_client *client;
- struct mutex mutex; /* avoid parallel access */
- struct regulator_bulk_data regs[2];
- wait_queue_head_t wait;
-
- int prox_en;
- bool prox_continuous_mode;
- bool lux_wait_fresh_res;
-
- /* Chip parameters */
- struct apds990x_chip_factors cf;
- struct reverse_factors rcf;
- u16 atime; /* als integration time */
- u16 arate; /* als reporting rate */
- u16 a_max_result; /* Max possible ADC value with current atime */
- u8 again_meas; /* Gain used in last measurement */
- u8 again_next; /* Next calculated gain */
- u8 pgain;
- u8 pdiode;
- u8 pdrive;
- u8 lux_persistence;
- u8 prox_persistence;
-
- u32 lux_raw;
- u32 lux;
- u16 lux_clear;
- u16 lux_ir;
- u16 lux_calib;
- u32 lux_thres_hi;
- u32 lux_thres_lo;
-
- u32 prox_thres;
- u16 prox_data;
- u16 prox_calib;
-
- char chipname[10];
- u8 revision;
-};
-
-#define APDS_CALIB_SCALER 8192
-#define APDS_LUX_NEUTRAL_CALIB_VALUE (1 * APDS_CALIB_SCALER)
-#define APDS_PROX_NEUTRAL_CALIB_VALUE (1 * APDS_CALIB_SCALER)
-
-#define APDS_PROX_DEF_THRES 600
-#define APDS_PROX_HYSTERESIS 50
-#define APDS_LUX_DEF_THRES_HI 101
-#define APDS_LUX_DEF_THRES_LO 100
-#define APDS_DEFAULT_PROX_PERS 1
-
-#define APDS_TIMEOUT 2000
-#define APDS_STARTUP_DELAY 25000 /* us */
-#define APDS_RANGE 65535
-#define APDS_PROX_RANGE 1023
-#define APDS_LUX_GAIN_LO_LIMIT 100
-#define APDS_LUX_GAIN_LO_LIMIT_STRICT 25
-
-#define TIMESTEP 87 /* 2.7ms is about 87 / 32 */
-#define TIME_STEP_SCALER 32
-
-#define APDS_LUX_AVERAGING_TIME 50 /* tolerates 50/60Hz ripple */
-#define APDS_LUX_DEFAULT_RATE 200
-
-static const u8 again[] = {1, 8, 16, 120}; /* ALS gain steps */
-
-/* Following two tables must match i.e 10Hz rate means 1 as persistence value */
-static const u16 arates_hz[] = {10, 5, 2, 1};
-static const u8 apersis[] = {1, 2, 4, 5};
-
-/* Regulators */
-static const char reg_vcc[] = "Vdd";
-static const char reg_vled[] = "Vled";
-
-static int apds990x_read_byte(struct apds990x_chip *chip, u8 reg, u8 *data)
-{
- struct i2c_client *client = chip->client;
- s32 ret;
-
- reg &= ~APDS990x_CMD_TYPE_MASK;
- reg |= APDS990x_CMD | APDS990x_CMD_TYPE_RB;
-
- ret = i2c_smbus_read_byte_data(client, reg);
- *data = ret;
- return (int)ret;
-}
-
-static int apds990x_read_word(struct apds990x_chip *chip, u8 reg, u16 *data)
-{
- struct i2c_client *client = chip->client;
- s32 ret;
-
- reg &= ~APDS990x_CMD_TYPE_MASK;
- reg |= APDS990x_CMD | APDS990x_CMD_TYPE_INC;
-
- ret = i2c_smbus_read_word_data(client, reg);
- *data = ret;
- return (int)ret;
-}
-
-static int apds990x_write_byte(struct apds990x_chip *chip, u8 reg, u8 data)
-{
- struct i2c_client *client = chip->client;
- s32 ret;
-
- reg &= ~APDS990x_CMD_TYPE_MASK;
- reg |= APDS990x_CMD | APDS990x_CMD_TYPE_RB;
-
- ret = i2c_smbus_write_byte_data(client, reg, data);
- return (int)ret;
-}
-
-static int apds990x_write_word(struct apds990x_chip *chip, u8 reg, u16 data)
-{
- struct i2c_client *client = chip->client;
- s32 ret;
-
- reg &= ~APDS990x_CMD_TYPE_MASK;
- reg |= APDS990x_CMD | APDS990x_CMD_TYPE_INC;
-
- ret = i2c_smbus_write_word_data(client, reg, data);
- return (int)ret;
-}
-
-static int apds990x_mode_on(struct apds990x_chip *chip)
-{
- /* ALS is mandatory, proximity optional */
- u8 reg = APDS990X_EN_AIEN | APDS990X_EN_PON | APDS990X_EN_AEN |
- APDS990X_EN_WEN;
-
- if (chip->prox_en)
- reg |= APDS990X_EN_PIEN | APDS990X_EN_PEN;
-
- return apds990x_write_byte(chip, APDS990X_ENABLE, reg);
-}
-
-static u16 apds990x_lux_to_threshold(struct apds990x_chip *chip, u32 lux)
-{
- u32 thres;
- u32 cpl;
- u32 ir;
-
- if (lux == 0)
- return 0;
- else if (lux == APDS_RANGE)
- return APDS_RANGE;
-
- /*
- * Reported LUX value is a combination of the IR and CLEAR channel
- * values. However, interrupt threshold is only for clear channel.
- * This function approximates needed HW threshold value for a given
- * LUX value in the current lightning type.
- * IR level compared to visible light varies heavily depending on the
- * source of the light
- *
- * Calculate threshold value for the next measurement period.
- * Math: threshold = lux * cpl where
- * cpl = atime * again / (glass_attenuation * device_factor)
- * (count-per-lux)
- *
- * First remove calibration. Division by four is to avoid overflow
- */
- lux = lux * (APDS_CALIB_SCALER / 4) / (chip->lux_calib / 4);
-
- /* Multiplication by 64 is to increase accuracy */
- cpl = ((u32)chip->atime * (u32)again[chip->again_next] *
- APDS_PARAM_SCALE * 64) / (chip->cf.ga * chip->cf.df);
-
- thres = lux * cpl / 64;
- /*
- * Convert IR light from the latest result to match with
- * new gain step. This helps to adapt with the current
- * source of light.
- */
- ir = (u32)chip->lux_ir * (u32)again[chip->again_next] /
- (u32)again[chip->again_meas];
-
- /*
- * Compensate count with IR light impact
- * IAC1 > IAC2 (see apds990x_get_lux for formulas)
- */
- if (chip->lux_clear * APDS_PARAM_SCALE >=
- chip->rcf.afactor * chip->lux_ir)
- thres = (chip->rcf.cf1 * thres + chip->rcf.irf1 * ir) /
- APDS_PARAM_SCALE;
- else
- thres = (chip->rcf.cf2 * thres + chip->rcf.irf2 * ir) /
- APDS_PARAM_SCALE;
-
- if (thres >= chip->a_max_result)
- thres = chip->a_max_result - 1;
- return thres;
-}
-
-static inline int apds990x_set_atime(struct apds990x_chip *chip, u32 time_ms)
-{
- u8 reg_value;
-
- chip->atime = time_ms;
- /* Formula is specified in the data sheet */
- reg_value = 256 - ((time_ms * TIME_STEP_SCALER) / TIMESTEP);
- /* Calculate max ADC value for given integration time */
- chip->a_max_result = (u16)(256 - reg_value) * APDS990X_TIME_TO_ADC;
- return apds990x_write_byte(chip, APDS990X_ATIME, reg_value);
-}
-
-/* Called always with mutex locked */
-static int apds990x_refresh_pthres(struct apds990x_chip *chip, int data)
-{
- int ret, lo, hi;
-
- /* If the chip is not in use, don't try to access it */
- if (pm_runtime_suspended(&chip->client->dev))
- return 0;
-
- if (data < chip->prox_thres) {
- lo = 0;
- hi = chip->prox_thres;
- } else {
- lo = chip->prox_thres - APDS_PROX_HYSTERESIS;
- if (chip->prox_continuous_mode)
- hi = chip->prox_thres;
- else
- hi = APDS_RANGE;
- }
-
- ret = apds990x_write_word(chip, APDS990X_PILTL, lo);
- ret |= apds990x_write_word(chip, APDS990X_PIHTL, hi);
- return ret;
-}
-
-/* Called always with mutex locked */
-static int apds990x_refresh_athres(struct apds990x_chip *chip)
-{
- int ret;
- /* If the chip is not in use, don't try to access it */
- if (pm_runtime_suspended(&chip->client->dev))
- return 0;
-
- ret = apds990x_write_word(chip, APDS990X_AILTL,
- apds990x_lux_to_threshold(chip, chip->lux_thres_lo));
- ret |= apds990x_write_word(chip, APDS990X_AIHTL,
- apds990x_lux_to_threshold(chip, chip->lux_thres_hi));
-
- return ret;
-}
-
-/* Called always with mutex locked */
-static void apds990x_force_a_refresh(struct apds990x_chip *chip)
-{
- /* This will force ALS interrupt after the next measurement. */
- apds990x_write_word(chip, APDS990X_AILTL, APDS_LUX_DEF_THRES_LO);
- apds990x_write_word(chip, APDS990X_AIHTL, APDS_LUX_DEF_THRES_HI);
-}
-
-/* Called always with mutex locked */
-static void apds990x_force_p_refresh(struct apds990x_chip *chip)
-{
- /* This will force proximity interrupt after the next measurement. */
- apds990x_write_word(chip, APDS990X_PILTL, APDS_PROX_DEF_THRES - 1);
- apds990x_write_word(chip, APDS990X_PIHTL, APDS_PROX_DEF_THRES);
-}
-
-/* Called always with mutex locked */
-static int apds990x_calc_again(struct apds990x_chip *chip)
-{
- int curr_again = chip->again_meas;
- int next_again = chip->again_meas;
- int ret = 0;
-
- /* Calculate suitable als gain */
- if (chip->lux_clear == chip->a_max_result)
- next_again -= 2; /* ALS saturated. Decrease gain by 2 steps */
- else if (chip->lux_clear > chip->a_max_result / 2)
- next_again--;
- else if (chip->lux_clear < APDS_LUX_GAIN_LO_LIMIT_STRICT)
- next_again += 2; /* Too dark. Increase gain by 2 steps */
- else if (chip->lux_clear < APDS_LUX_GAIN_LO_LIMIT)
- next_again++;
-
- /* Limit gain to available range */
- if (next_again < 0)
- next_again = 0;
- else if (next_again > APDS990X_MAX_AGAIN)
- next_again = APDS990X_MAX_AGAIN;
-
- /* Let's check can we trust the measured result */
- if (chip->lux_clear == chip->a_max_result)
- /* Result can be totally garbage due to saturation */
- ret = -ERANGE;
- else if (next_again != curr_again &&
- chip->lux_clear < APDS_LUX_GAIN_LO_LIMIT_STRICT)
- /*
- * Gain is changed and measurement result is very small.
- * Result can be totally garbage due to underflow
- */
- ret = -ERANGE;
-
- chip->again_next = next_again;
- apds990x_write_byte(chip, APDS990X_CONTROL,
- (chip->pdrive << 6) |
- (chip->pdiode << 4) |
- (chip->pgain << 2) |
- (chip->again_next << 0));
-
- /*
- * Error means bad result -> re-measurement is needed. The forced
- * refresh uses fastest possible persistence setting to get result
- * as soon as possible.
- */
- if (ret < 0)
- apds990x_force_a_refresh(chip);
- else
- apds990x_refresh_athres(chip);
-
- return ret;
-}
-
-/* Called always with mutex locked */
-static int apds990x_get_lux(struct apds990x_chip *chip, int clear, int ir)
-{
- int iac, iac1, iac2; /* IR adjusted counts */
- u32 lpc; /* Lux per count */
-
- /* Formulas:
- * iac1 = CF1 * CLEAR_CH - IRF1 * IR_CH
- * iac2 = CF2 * CLEAR_CH - IRF2 * IR_CH
- */
- iac1 = (chip->cf.cf1 * clear - chip->cf.irf1 * ir) / APDS_PARAM_SCALE;
- iac2 = (chip->cf.cf2 * clear - chip->cf.irf2 * ir) / APDS_PARAM_SCALE;
-
- iac = max(iac1, iac2);
- iac = max(iac, 0);
-
- lpc = APDS990X_LUX_OUTPUT_SCALE * (chip->cf.df * chip->cf.ga) /
- (u32)(again[chip->again_meas] * (u32)chip->atime);
-
- return (iac * lpc) / APDS_PARAM_SCALE;
-}
-
-static int apds990x_ack_int(struct apds990x_chip *chip, u8 mode)
-{
- struct i2c_client *client = chip->client;
- s32 ret;
- u8 reg = APDS990x_CMD | APDS990x_CMD_TYPE_SPE;
-
- switch (mode & (APDS990X_ST_AINT | APDS990X_ST_PINT)) {
- case APDS990X_ST_AINT:
- reg |= APDS990X_INT_ACK_ALS;
- break;
- case APDS990X_ST_PINT:
- reg |= APDS990X_INT_ACK_PS;
- break;
- default:
- reg |= APDS990X_INT_ACK_BOTH;
- break;
- }
-
- ret = i2c_smbus_read_byte_data(client, reg);
- return (int)ret;
-}
-
-static irqreturn_t apds990x_irq(int irq, void *data)
-{
- struct apds990x_chip *chip = data;
- u8 status;
-
- apds990x_read_byte(chip, APDS990X_STATUS, &status);
- apds990x_ack_int(chip, status);
-
- mutex_lock(&chip->mutex);
- if (!pm_runtime_suspended(&chip->client->dev)) {
- if (status & APDS990X_ST_AINT) {
- apds990x_read_word(chip, APDS990X_CDATAL,
- &chip->lux_clear);
- apds990x_read_word(chip, APDS990X_IRDATAL,
- &chip->lux_ir);
- /* Store used gain for calculations */
- chip->again_meas = chip->again_next;
-
- chip->lux_raw = apds990x_get_lux(chip,
- chip->lux_clear,
- chip->lux_ir);
-
- if (apds990x_calc_again(chip) == 0) {
- /* Result is valid */
- chip->lux = chip->lux_raw;
- chip->lux_wait_fresh_res = false;
- wake_up(&chip->wait);
- sysfs_notify(&chip->client->dev.kobj,
- NULL, "lux0_input");
- }
- }
-
- if ((status & APDS990X_ST_PINT) && chip->prox_en) {
- u16 clr_ch;
-
- apds990x_read_word(chip, APDS990X_CDATAL, &clr_ch);
- /*
- * If ALS channel is saturated at min gain,
- * proximity gives false posivite values.
- * Just ignore them.
- */
- if (chip->again_meas == 0 &&
- clr_ch == chip->a_max_result)
- chip->prox_data = 0;
- else
- apds990x_read_word(chip,
- APDS990X_PDATAL,
- &chip->prox_data);
-
- apds990x_refresh_pthres(chip, chip->prox_data);
- if (chip->prox_data < chip->prox_thres)
- chip->prox_data = 0;
- else if (!chip->prox_continuous_mode)
- chip->prox_data = APDS_PROX_RANGE;
- sysfs_notify(&chip->client->dev.kobj,
- NULL, "prox0_raw");
- }
- }
- mutex_unlock(&chip->mutex);
- return IRQ_HANDLED;
-}
-
-static int apds990x_configure(struct apds990x_chip *chip)
-{
- /* It is recommended to use disabled mode during these operations */
- apds990x_write_byte(chip, APDS990X_ENABLE, APDS990X_EN_DISABLE_ALL);
-
- /* conversion and wait times for different state machince states */
- apds990x_write_byte(chip, APDS990X_PTIME, APDS990X_PTIME_DEFAULT);
- apds990x_write_byte(chip, APDS990X_WTIME, APDS990X_WTIME_DEFAULT);
- apds990x_set_atime(chip, APDS_LUX_AVERAGING_TIME);
-
- apds990x_write_byte(chip, APDS990X_CONFIG, 0);
-
- /* Persistence levels */
- apds990x_write_byte(chip, APDS990X_PERS,
- (chip->lux_persistence << APDS990X_APERS_SHIFT) |
- (chip->prox_persistence << APDS990X_PPERS_SHIFT));
-
- apds990x_write_byte(chip, APDS990X_PPCOUNT, chip->pdata->ppcount);
-
- /* Start with relatively small gain */
- chip->again_meas = 1;
- chip->again_next = 1;
- apds990x_write_byte(chip, APDS990X_CONTROL,
- (chip->pdrive << 6) |
- (chip->pdiode << 4) |
- (chip->pgain << 2) |
- (chip->again_next << 0));
- return 0;
-}
-
-static int apds990x_detect(struct apds990x_chip *chip)
-{
- struct i2c_client *client = chip->client;
- int ret;
- u8 id;
-
- ret = apds990x_read_byte(chip, APDS990X_ID, &id);
- if (ret < 0) {
- dev_err(&client->dev, "ID read failed\n");
- return ret;
- }
-
- ret = apds990x_read_byte(chip, APDS990X_REV, &chip->revision);
- if (ret < 0) {
- dev_err(&client->dev, "REV read failed\n");
- return ret;
- }
-
- switch (id) {
- case APDS990X_ID_0:
- case APDS990X_ID_4:
- case APDS990X_ID_29:
- snprintf(chip->chipname, sizeof(chip->chipname), "APDS-990x");
- break;
- default:
- ret = -ENODEV;
- break;
- }
- return ret;
-}
-
-#ifdef CONFIG_PM
-static int apds990x_chip_on(struct apds990x_chip *chip)
-{
- int err = regulator_bulk_enable(ARRAY_SIZE(chip->regs),
- chip->regs);
- if (err < 0)
- return err;
-
- usleep_range(APDS_STARTUP_DELAY, 2 * APDS_STARTUP_DELAY);
-
- /* Refresh all configs in case of regulators were off */
- chip->prox_data = 0;
- apds990x_configure(chip);
- apds990x_mode_on(chip);
- return 0;
-}
-#endif
-
-static int apds990x_chip_off(struct apds990x_chip *chip)
-{
- apds990x_write_byte(chip, APDS990X_ENABLE, APDS990X_EN_DISABLE_ALL);
- regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
- return 0;
-}
-
-static ssize_t apds990x_lux_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct apds990x_chip *chip = dev_get_drvdata(dev);
- ssize_t ret;
- u32 result;
- long time_left;
-
- if (pm_runtime_suspended(dev))
- return -EIO;
-
- time_left = wait_event_interruptible_timeout(chip->wait,
- !chip->lux_wait_fresh_res,
- msecs_to_jiffies(APDS_TIMEOUT));
- if (!time_left)
- return -EIO;
-
- mutex_lock(&chip->mutex);
- result = (chip->lux * chip->lux_calib) / APDS_CALIB_SCALER;
- if (result > (APDS_RANGE * APDS990X_LUX_OUTPUT_SCALE))
- result = APDS_RANGE * APDS990X_LUX_OUTPUT_SCALE;
-
- ret = sprintf(buf, "%d.%d\n",
- result / APDS990X_LUX_OUTPUT_SCALE,
- result % APDS990X_LUX_OUTPUT_SCALE);
- mutex_unlock(&chip->mutex);
- return ret;
-}
-
-static DEVICE_ATTR(lux0_input, S_IRUGO, apds990x_lux_show, NULL);
-
-static ssize_t apds990x_lux_range_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return sprintf(buf, "%u\n", APDS_RANGE);
-}
-
-static DEVICE_ATTR(lux0_sensor_range, S_IRUGO, apds990x_lux_range_show, NULL);
-
-static ssize_t apds990x_lux_calib_format_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return sprintf(buf, "%u\n", APDS_CALIB_SCALER);
-}
-
-static DEVICE_ATTR(lux0_calibscale_default, S_IRUGO,
- apds990x_lux_calib_format_show, NULL);
-
-static ssize_t apds990x_lux_calib_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct apds990x_chip *chip = dev_get_drvdata(dev);
-
- return sprintf(buf, "%u\n", chip->lux_calib);
-}
-
-static ssize_t apds990x_lux_calib_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- struct apds990x_chip *chip = dev_get_drvdata(dev);
- unsigned long value;
- int ret;
-
- ret = kstrtoul(buf, 0, &value);
- if (ret)
- return ret;
-
- chip->lux_calib = value;
-
- return len;
-}
-
-static DEVICE_ATTR(lux0_calibscale, S_IRUGO | S_IWUSR, apds990x_lux_calib_show,
- apds990x_lux_calib_store);
-
-static ssize_t apds990x_rate_avail(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- int i;
- int pos = 0;
-
- for (i = 0; i < ARRAY_SIZE(arates_hz); i++)
- pos += sprintf(buf + pos, "%d ", arates_hz[i]);
- sprintf(buf + pos - 1, "\n");
- return pos;
-}
-
-static ssize_t apds990x_rate_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct apds990x_chip *chip = dev_get_drvdata(dev);
-
- return sprintf(buf, "%d\n", chip->arate);
-}
-
-static int apds990x_set_arate(struct apds990x_chip *chip, int rate)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(arates_hz); i++)
- if (rate >= arates_hz[i])
- break;
-
- if (i == ARRAY_SIZE(arates_hz))
- return -EINVAL;
-
- /* Pick up corresponding persistence value */
- chip->lux_persistence = apersis[i];
- chip->arate = arates_hz[i];
-
- /* If the chip is not in use, don't try to access it */
- if (pm_runtime_suspended(&chip->client->dev))
- return 0;
-
- /* Persistence levels */
- return apds990x_write_byte(chip, APDS990X_PERS,
- (chip->lux_persistence << APDS990X_APERS_SHIFT) |
- (chip->prox_persistence << APDS990X_PPERS_SHIFT));
-}
-
-static ssize_t apds990x_rate_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- struct apds990x_chip *chip = dev_get_drvdata(dev);
- unsigned long value;
- int ret;
-
- ret = kstrtoul(buf, 0, &value);
- if (ret)
- return ret;
-
- mutex_lock(&chip->mutex);
- ret = apds990x_set_arate(chip, value);
- mutex_unlock(&chip->mutex);
-
- if (ret < 0)
- return ret;
- return len;
-}
-
-static DEVICE_ATTR(lux0_rate_avail, S_IRUGO, apds990x_rate_avail, NULL);
-
-static DEVICE_ATTR(lux0_rate, S_IRUGO | S_IWUSR, apds990x_rate_show,
- apds990x_rate_store);
-
-static ssize_t apds990x_prox_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- ssize_t ret;
- struct apds990x_chip *chip = dev_get_drvdata(dev);
-
- if (pm_runtime_suspended(dev) || !chip->prox_en)
- return -EIO;
-
- mutex_lock(&chip->mutex);
- ret = sprintf(buf, "%d\n", chip->prox_data);
- mutex_unlock(&chip->mutex);
- return ret;
-}
-
-static DEVICE_ATTR(prox0_raw, S_IRUGO, apds990x_prox_show, NULL);
-
-static ssize_t apds990x_prox_range_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return sprintf(buf, "%u\n", APDS_PROX_RANGE);
-}
-
-static DEVICE_ATTR(prox0_sensor_range, S_IRUGO, apds990x_prox_range_show, NULL);
-
-static ssize_t apds990x_prox_enable_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct apds990x_chip *chip = dev_get_drvdata(dev);
-
- return sprintf(buf, "%d\n", chip->prox_en);
-}
-
-static ssize_t apds990x_prox_enable_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- struct apds990x_chip *chip = dev_get_drvdata(dev);
- unsigned long value;
- int ret;
-
- ret = kstrtoul(buf, 0, &value);
- if (ret)
- return ret;
-
- mutex_lock(&chip->mutex);
-
- if (!chip->prox_en)
- chip->prox_data = 0;
-
- if (value)
- chip->prox_en++;
- else if (chip->prox_en > 0)
- chip->prox_en--;
-
- if (!pm_runtime_suspended(dev))
- apds990x_mode_on(chip);
- mutex_unlock(&chip->mutex);
- return len;
-}
-
-static DEVICE_ATTR(prox0_raw_en, S_IRUGO | S_IWUSR, apds990x_prox_enable_show,
- apds990x_prox_enable_store);
-
-static const char *reporting_modes[] = {"trigger", "periodic"};
-
-static ssize_t apds990x_prox_reporting_mode_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct apds990x_chip *chip = dev_get_drvdata(dev);
-
- return sprintf(buf, "%s\n",
- reporting_modes[!!chip->prox_continuous_mode]);
-}
-
-static ssize_t apds990x_prox_reporting_mode_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- struct apds990x_chip *chip = dev_get_drvdata(dev);
- int ret;
-
- ret = sysfs_match_string(reporting_modes, buf);
- if (ret < 0)
- return ret;
-
- chip->prox_continuous_mode = ret;
- return len;
-}
-
-static DEVICE_ATTR(prox0_reporting_mode, S_IRUGO | S_IWUSR,
- apds990x_prox_reporting_mode_show,
- apds990x_prox_reporting_mode_store);
-
-static ssize_t apds990x_prox_reporting_avail_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return sprintf(buf, "%s %s\n", reporting_modes[0], reporting_modes[1]);
-}
-
-static DEVICE_ATTR(prox0_reporting_mode_avail, S_IRUGO | S_IWUSR,
- apds990x_prox_reporting_avail_show, NULL);
-
-
-static ssize_t apds990x_lux_thresh_above_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct apds990x_chip *chip = dev_get_drvdata(dev);
-
- return sprintf(buf, "%d\n", chip->lux_thres_hi);
-}
-
-static ssize_t apds990x_lux_thresh_below_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct apds990x_chip *chip = dev_get_drvdata(dev);
-
- return sprintf(buf, "%d\n", chip->lux_thres_lo);
-}
-
-static ssize_t apds990x_set_lux_thresh(struct apds990x_chip *chip, u32 *target,
- const char *buf)
-{
- unsigned long thresh;
- int ret;
-
- ret = kstrtoul(buf, 0, &thresh);
- if (ret)
- return ret;
-
- if (thresh > APDS_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_fresh_res)
- apds990x_refresh_athres(chip);
- mutex_unlock(&chip->mutex);
- return ret;
-
-}
-
-static ssize_t apds990x_lux_thresh_above_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- struct apds990x_chip *chip = dev_get_drvdata(dev);
- int ret = apds990x_set_lux_thresh(chip, &chip->lux_thres_hi, buf);
-
- if (ret < 0)
- return ret;
- return len;
-}
-
-static ssize_t apds990x_lux_thresh_below_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- struct apds990x_chip *chip = dev_get_drvdata(dev);
- int ret = apds990x_set_lux_thresh(chip, &chip->lux_thres_lo, buf);
-
- if (ret < 0)
- return ret;
- return len;
-}
-
-static DEVICE_ATTR(lux0_thresh_above_value, S_IRUGO | S_IWUSR,
- apds990x_lux_thresh_above_show,
- apds990x_lux_thresh_above_store);
-
-static DEVICE_ATTR(lux0_thresh_below_value, S_IRUGO | S_IWUSR,
- apds990x_lux_thresh_below_show,
- apds990x_lux_thresh_below_store);
-
-static ssize_t apds990x_prox_threshold_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct apds990x_chip *chip = dev_get_drvdata(dev);
-
- return sprintf(buf, "%d\n", chip->prox_thres);
-}
-
-static ssize_t apds990x_prox_threshold_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- struct apds990x_chip *chip = dev_get_drvdata(dev);
- unsigned long value;
- int ret;
-
- ret = kstrtoul(buf, 0, &value);
- if (ret)
- return ret;
-
- if ((value > APDS_RANGE) || (value == 0) ||
- (value < APDS_PROX_HYSTERESIS))
- return -EINVAL;
-
- mutex_lock(&chip->mutex);
- chip->prox_thres = value;
-
- apds990x_force_p_refresh(chip);
- mutex_unlock(&chip->mutex);
- return len;
-}
-
-static DEVICE_ATTR(prox0_thresh_above_value, S_IRUGO | S_IWUSR,
- apds990x_prox_threshold_show,
- apds990x_prox_threshold_store);
-
-static ssize_t apds990x_power_state_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return sprintf(buf, "%d\n", !pm_runtime_suspended(dev));
-}
-
-static ssize_t apds990x_power_state_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- struct apds990x_chip *chip = dev_get_drvdata(dev);
- unsigned long value;
- int ret;
-
- ret = kstrtoul(buf, 0, &value);
- if (ret)
- return ret;
-
- if (value) {
- pm_runtime_get_sync(dev);
- mutex_lock(&chip->mutex);
- chip->lux_wait_fresh_res = true;
- apds990x_force_a_refresh(chip);
- apds990x_force_p_refresh(chip);
- mutex_unlock(&chip->mutex);
- } else {
- if (!pm_runtime_suspended(dev))
- pm_runtime_put(dev);
- }
- return len;
-}
-
-static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR,
- apds990x_power_state_show,
- apds990x_power_state_store);
-
-static ssize_t apds990x_chip_id_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct apds990x_chip *chip = dev_get_drvdata(dev);
-
- return sprintf(buf, "%s %d\n", chip->chipname, chip->revision);
-}
-
-static DEVICE_ATTR(chip_id, S_IRUGO, apds990x_chip_id_show, NULL);
-
-static struct attribute *sysfs_attrs_ctrl[] = {
- &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_en.attr,
- &dev_attr_prox0_raw.attr,
- &dev_attr_prox0_sensor_range.attr,
- &dev_attr_prox0_thresh_above_value.attr,
- &dev_attr_prox0_reporting_mode.attr,
- &dev_attr_prox0_reporting_mode_avail.attr,
- &dev_attr_chip_id.attr,
- &dev_attr_power_state.attr,
- NULL
-};
-
-static const struct attribute_group apds990x_attribute_group[] = {
- {.attrs = sysfs_attrs_ctrl },
-};
-
-static int apds990x_probe(struct i2c_client *client)
-{
- struct apds990x_chip *chip;
- int err;
-
- chip = kzalloc_obj(*chip);
- if (!chip)
- return -ENOMEM;
-
- i2c_set_clientdata(client, chip);
- chip->client = client;
-
- init_waitqueue_head(&chip->wait);
- mutex_init(&chip->mutex);
- chip->pdata = client->dev.platform_data;
-
- if (chip->pdata == NULL) {
- dev_err(&client->dev, "platform data is mandatory\n");
- err = -EINVAL;
- goto fail1;
- }
-
- if (chip->pdata->cf.ga == 0) {
- /* set uncovered sensor default parameters */
- chip->cf.ga = 1966; /* 0.48 * APDS_PARAM_SCALE */
- chip->cf.cf1 = 4096; /* 1.00 * APDS_PARAM_SCALE */
- chip->cf.irf1 = 9134; /* 2.23 * APDS_PARAM_SCALE */
- chip->cf.cf2 = 2867; /* 0.70 * APDS_PARAM_SCALE */
- chip->cf.irf2 = 5816; /* 1.42 * APDS_PARAM_SCALE */
- chip->cf.df = 52;
- } else {
- chip->cf = chip->pdata->cf;
- }
-
- /* precalculate inverse chip factors for threshold control */
- chip->rcf.afactor =
- (chip->cf.irf1 - chip->cf.irf2) * APDS_PARAM_SCALE /
- (chip->cf.cf1 - chip->cf.cf2);
- chip->rcf.cf1 = APDS_PARAM_SCALE * APDS_PARAM_SCALE /
- chip->cf.cf1;
- chip->rcf.irf1 = chip->cf.irf1 * APDS_PARAM_SCALE /
- chip->cf.cf1;
- chip->rcf.cf2 = APDS_PARAM_SCALE * APDS_PARAM_SCALE /
- chip->cf.cf2;
- chip->rcf.irf2 = chip->cf.irf2 * APDS_PARAM_SCALE /
- chip->cf.cf2;
-
- /* Set something to start with */
- chip->lux_thres_hi = APDS_LUX_DEF_THRES_HI;
- chip->lux_thres_lo = APDS_LUX_DEF_THRES_LO;
- chip->lux_calib = APDS_LUX_NEUTRAL_CALIB_VALUE;
-
- chip->prox_thres = APDS_PROX_DEF_THRES;
- chip->pdrive = chip->pdata->pdrive;
- chip->pdiode = APDS_PDIODE_IR;
- chip->pgain = APDS_PGAIN_1X;
- chip->prox_calib = APDS_PROX_NEUTRAL_CALIB_VALUE;
- chip->prox_persistence = APDS_DEFAULT_PROX_PERS;
- chip->prox_continuous_mode = false;
-
- chip->regs[0].supply = reg_vcc;
- chip->regs[1].supply = reg_vled;
-
- err = regulator_bulk_get(&client->dev,
- ARRAY_SIZE(chip->regs), chip->regs);
- if (err < 0) {
- dev_err(&client->dev, "Cannot get regulators\n");
- goto fail1;
- }
-
- err = regulator_bulk_enable(ARRAY_SIZE(chip->regs), chip->regs);
- if (err < 0) {
- dev_err(&client->dev, "Cannot enable regulators\n");
- goto fail2;
- }
-
- usleep_range(APDS_STARTUP_DELAY, 2 * APDS_STARTUP_DELAY);
-
- err = apds990x_detect(chip);
- if (err < 0) {
- dev_err(&client->dev, "APDS990X not found\n");
- goto fail3;
- }
-
- pm_runtime_set_active(&client->dev);
-
- apds990x_configure(chip);
- apds990x_set_arate(chip, APDS_LUX_DEFAULT_RATE);
- apds990x_mode_on(chip);
-
- pm_runtime_enable(&client->dev);
-
- if (chip->pdata->setup_resources) {
- err = chip->pdata->setup_resources();
- if (err) {
- err = -EINVAL;
- goto fail4;
- }
- }
-
- err = sysfs_create_group(&chip->client->dev.kobj,
- apds990x_attribute_group);
- if (err < 0) {
- dev_err(&chip->client->dev, "Sysfs registration failed\n");
- goto fail5;
- }
-
- err = request_threaded_irq(client->irq, NULL,
- apds990x_irq,
- IRQF_TRIGGER_FALLING | IRQF_TRIGGER_LOW |
- IRQF_ONESHOT,
- "apds990x", chip);
- if (err) {
- dev_err(&client->dev, "could not get IRQ %d\n",
- client->irq);
- goto fail6;
- }
- return err;
-fail6:
- sysfs_remove_group(&chip->client->dev.kobj,
- &apds990x_attribute_group[0]);
-fail5:
- if (chip->pdata && chip->pdata->release_resources)
- chip->pdata->release_resources();
-fail4:
- pm_runtime_disable(&client->dev);
-fail3:
- regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs);
-fail2:
- regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs);
-fail1:
- kfree(chip);
- return err;
-}
-
-static void apds990x_remove(struct i2c_client *client)
-{
- struct apds990x_chip *chip = i2c_get_clientdata(client);
-
- free_irq(client->irq, chip);
- sysfs_remove_group(&chip->client->dev.kobj,
- apds990x_attribute_group);
-
- if (chip->pdata && chip->pdata->release_resources)
- chip->pdata->release_resources();
-
- if (!pm_runtime_suspended(&client->dev))
- apds990x_chip_off(chip);
-
- pm_runtime_disable(&client->dev);
- pm_runtime_set_suspended(&client->dev);
-
- regulator_bulk_free(ARRAY_SIZE(chip->regs), chip->regs);
-
- kfree(chip);
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int apds990x_suspend(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct apds990x_chip *chip = i2c_get_clientdata(client);
-
- apds990x_chip_off(chip);
- return 0;
-}
-
-static int apds990x_resume(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct apds990x_chip *chip = i2c_get_clientdata(client);
-
- /*
- * If we were enabled at suspend time, it is expected
- * everything works nice and smoothly. Chip_on is enough
- */
- apds990x_chip_on(chip);
-
- return 0;
-}
-#endif
-
-#ifdef CONFIG_PM
-static int apds990x_runtime_suspend(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct apds990x_chip *chip = i2c_get_clientdata(client);
-
- apds990x_chip_off(chip);
- return 0;
-}
-
-static int apds990x_runtime_resume(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct apds990x_chip *chip = i2c_get_clientdata(client);
-
- apds990x_chip_on(chip);
- return 0;
-}
-
-#endif
-
-static const struct i2c_device_id apds990x_id[] = {
- { "apds990x" },
- {}
-};
-
-MODULE_DEVICE_TABLE(i2c, apds990x_id);
-
-static const struct dev_pm_ops apds990x_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(apds990x_suspend, apds990x_resume)
- SET_RUNTIME_PM_OPS(apds990x_runtime_suspend,
- apds990x_runtime_resume,
- NULL)
-};
-
-static struct i2c_driver apds990x_driver = {
- .driver = {
- .name = "apds990x",
- .pm = &apds990x_pm_ops,
- },
- .probe = apds990x_probe,
- .remove = apds990x_remove,
- .id_table = apds990x_id,
-};
-
-module_i2c_driver(apds990x_driver);
-
-MODULE_DESCRIPTION("APDS990X combined ALS and proximity sensor");
-MODULE_AUTHOR("Samu Onkalo, Nokia Corporation");
-MODULE_LICENSE("GPL v2");
projects / thirdparty / kernel / linux.git / commitdiff
