This is a driver for ROHM BH1770GLC and OSRAM SFH7770 combined ALS and proximity sensor.
Interface is sysfs based. The driver uses interrupts to provide new data. The driver supports pm_runtime and regulator frameworks. See Documentation/misc-devices/bhsfh.txt for details Signed-off-by: Samu Onkalo <[email protected]> --- drivers/misc/bhsfh.c | 1443 +++++++++++++++++++++++++++++++++++++++++++++ include/linux/i2c/bhsfh.h | 42 ++ 2 files changed, 1485 insertions(+), 0 deletions(-) create mode 100644 drivers/misc/bhsfh.c create mode 100644 include/linux/i2c/bhsfh.h diff --git a/drivers/misc/bhsfh.c b/drivers/misc/bhsfh.c new file mode 100644 index 0000000..e82fadb --- /dev/null +++ b/drivers/misc/bhsfh.c @@ -0,0 +1,1443 @@ +/* + * This file is part of the ROHM BH1770GLC / OSRAM SFH7770 sensor driver. + * Chip is combined proximity and ambient light sensor. + * + * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). + * + * Contact: Samu Onkalo <[email protected]> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/mutex.h> +#include <linux/i2c/bhsfh.h> +#include <linux/regulator/consumer.h> +#include <linux/pm_runtime.h> +#include <linux/workqueue.h> +#include <linux/delay.h> +#include <linux/wait.h> +#include <linux/slab.h> + +#define BHSFH_ALS_CONTROL 0x80 /* ALS operation mode control */ +#define BHSFH_PS_CONTROL 0x81 /* PS operation mode control */ +#define BHSFH_I_LED 0x82 /* active LED and LED1, LED2 current */ +#define BHSFH_I_LED3 0x83 /* LED3 current setting */ +#define BHSFH_ALS_PS_MEAS 0x84 /* Forced mode trigger */ +#define BHSFH_PS_MEAS_RATE 0x85 /* PS meas. rate at stand alone mode */ +#define BHSFH_ALS_MEAS_RATE 0x86 /* ALS meas. rate at stand alone mode */ +#define BHSFH_PART_ID 0x8a /* Part number and revision ID */ +#define BHSFH_MANUFACT_ID 0x8b /* Manufacturerer ID */ +#define BHSFH_ALS_DATA_0 0x8c /* ALS DATA low byte */ +#define BHSFH_ALS_DATA_1 0x8d /* ALS DATA high byte */ +#define BHSFH_ALS_PS_STATUS 0x8e /* Measurement data and int status */ +#define BHSFH_PS_DATA_LED1 0x8f /* PS data from LED1 */ +#define BHSFH_PS_DATA_LED2 0x90 /* PS data from LED2 */ +#define BHSFH_PS_DATA_LED3 0x91 /* PS data from LED3 */ +#define BHSFH_INTERRUPT 0x92 /* Interrupt setting */ +#define BHSFH_PS_TH_LED1 0x93 /* PS interrupt threshold for LED1 */ +#define BHSFH_PS_TH_LED2 0x94 /* PS interrupt threshold for LED2 */ +#define BHSFH_PS_TH_LED3 0x95 /* PS interrupt threshold for LED3 */ +#define BHSFH_ALS_TH_UP_0 0x96 /* ALS upper threshold low byte */ +#define BHSFH_ALS_TH_UP_1 0x97 /* ALS upper threshold high byte */ +#define BHSFH_ALS_TH_LOW_0 0x98 /* ALS lower threshold low byte */ +#define BHSFH_ALS_TH_LOW_1 0x99 /* ALS lower threshold high byte */ + +/* MANUFACT_ID */ +#define BHSFH_MANUFACT_ROHM 0x01 +#define BHSFH_MANUFACT_OSRAM 0x03 + +/* PART_ID */ +#define BHSFH_PART 0x90 +#define BHSFH_PART_MASK 0xf0 +#define BHSFH_REV_MASK 0x0f +#define BHSFH_REV_SHIFT 0 +#define BHSFH_REV_0 0x00 +#define BHSFH_REV_1 0x01 + +/* ALS_MEAS_RATE */ +#define BHSFH_ALS_MAX_RATE 9 + +/* PS_MEAS_RATE */ +#define BHSFH_PS_MAX_RATE 4 + +/* Operating modes for both */ +#define BHSFH_STANDBY 0x00 +#define BHSFH_FORCED 0x02 +#define BHSFH_STANDALONE 0x03 +#define BHSFH_SWRESET (0x01 << 2) + +#define BHSFH_PS_TRIG_MEAS (1 << 0) +#define BHSFH_ALS_TRIG_MEAS (1 << 1) + +/* Interrupt control */ +#define BHSFH_INT_OUTPUT_MODE (1 << 3) /* 0 = latched */ +#define BHSFH_INT_POLARITY (1 << 2) /* 1 = active high */ +#define BHSFH_INT_ALS_ENA (1 << 1) +#define BHSFH_INT_PS_ENA (1 << 0) + +/* Interrupt status */ +#define BHSFH_INT_LED1_DATA (1 << 0) +#define BHSFH_INT_LED1_INT (1 << 1) +#define BHSFH_INT_LED2_DATA (1 << 2) +#define BHSFH_INT_LED2_INT (1 << 3) +#define BHSFH_INT_LED3_DATA (1 << 4) +#define BHSFH_INT_LED3_INT (1 << 5) +#define BHSFH_INT_LEDS_INT ((1 << 1) | (1 << 3) | (1 << 5)) +#define BHSFH_INT_ALS_DATA (1 << 6) +#define BHSFH_INT_ALS_INT (1 << 7) + +/* Led channels */ +#define BHSFH_LED1 0x00 + +#define BHSFH_DISABLE 0 +#define BHSFH_ENABLE 1 +#define BHSFH_PROX_CHANNELS 1 + +#define BHSFH_LUX_DEFAULT_RATE 1 /* Index to lux rate table */ +#define BHSFH_PROX_DEFAULT_RATE 50 /* in Hz */ +#define BHSFH_PROX_DEF_RATE_THRESH 5 /* in Hz */ +#define BHSFH_STARTUP_DELAY 50 +#define BHSFH_RESET_TIME 10 +#define BHSFH_TIMEOUT 2100 /* Timeout in 2.1 seconds */ + +#define BHSFH_LUX_RANGE 65535 +#define BHSFH_PROX_RANGE 255 +#define BHSFH_COEF_SCALER 1024 +#define BHSFH_CALIB_SCALER 8192 +#define BHSFH_LUX_NEUTRAL_CALIB_VALUE (1 * BHSFH_CALIB_SCALER) +#define BHSFH_LUX_DEF_THRES 1000 +#define BHSFH_PROX_DEF_THRES 70 +#define BHSFH_PROX_DEF_ABS_THRES 100 +#define BHSFH_DEFAULT_PERSISTENCE 10 +#define BHSFH_PROX_MAX_PERSISTENCE 50 +#define BHSFH_LUX_GA_SCALE 16384 +#define BHSFH_LUX_CF_SCALE 2048 /* CF ChipFactor */ +#define BHSFH_NEUTRAL_CF BHSFH_LUX_CF_SCALE +#define BHSFH_LUX_CORR_SCALE 4096 + +#define PROX_ABOVE_THRESHOLD 1 +#define PROX_BELOW_THRESHOLD 0 + +#define PROX_IGNORE_LUX_LIMIT 500 + +struct bhsfh_chip { + struct bhsfh_platform_data *pdata; + char chipname[10]; + u8 revision; + struct i2c_client *client; + struct regulator_bulk_data regs[2]; + struct mutex mutex; /* avoid parallel access */ + wait_queue_head_t wait; + + bool int_mode_prox; + bool int_mode_lux; + struct delayed_work prox_work; + u32 lux_cf; /* Chip specific factor */ + u32 lux_ga; + u32 lux_calib; + int lux_rate_index; + u32 lux_corr; + u16 lux_data_raw; + u16 lux_threshold_hi; + u16 lux_threshold_lo; + u16 lux_thres_hi_onchip; + u16 lux_thres_lo_onchip; + bool lux_wait_result; + + int prox_enable_count; + u16 prox_coef; + u16 prox_const; + int prox_rate; + int prox_rate_threshold; + u8 prox_persistence; + u8 prox_persistence_counter; + u8 prox_data; + u8 prox_threshold; + u8 prox_threshold_hw; + bool prox_force_update; + u8 prox_abs_thres; + u8 prox_led; + u8 prox_channels; /* nbr of leds */ +}; + +static const char reg_vcc[] = "Vcc"; +static const char reg_vleds[] = "Vleds"; + +/* + * Supported stand alone rates in ms from chip data sheet + * {10, 20, 30, 40, 70, 100, 200, 500, 1000, 2000}; + */ +static const s16 prox_rates_hz[] = {100, 50, 33, 25, 14, 10, 5, 2}; +static const s16 prox_rates_ms[] = {10, 20, 30, 40, 70, 100, 200, 500}; + +/* Supported IR-led currents in mA */ +static const u8 prox_curr_ma[] = {5, 10, 20, 50, 100, 150, 200}; + +/* + * Supported stand alone rates in ms from chip data sheet + * {100, 200, 500, 1000, 2000}; + */ +static const s16 lux_rates_hz[] = {10, 5, 2, 1, 0}; + +/* + * interrupt control functions are called while keeping chip->mutex + * excluding module probe / remove + */ +static inline int bhsfh_lux_interrupt_control(struct bhsfh_chip *chip, + int lux) +{ + chip->int_mode_lux = lux; + /* Set interrupt modes, interrupt active low, latched */ + return i2c_smbus_write_byte_data(chip->client, + BHSFH_INTERRUPT, + (lux << 1) | chip->int_mode_prox); +} + +static inline int bhsfh_prox_interrupt_control(struct bhsfh_chip *chip, + int ps) +{ + chip->int_mode_prox = ps; + return i2c_smbus_write_byte_data(chip->client, + BHSFH_INTERRUPT, + (chip->int_mode_lux << 1) | (ps << 0)); +} + +/* chip->mutex is always kept here */ +static int bhsfh_lux_rate(struct bhsfh_chip *chip, int rate_index) +{ + /* sysfs may call this when the chip is powered off */ + if (pm_runtime_suspended(&chip->client->dev)) + return 0; + + /* Proper proximity response needs fastest lux rate (100ms) */ + if (chip->prox_enable_count) + rate_index = 0; + + return i2c_smbus_write_byte_data(chip->client, + BHSFH_ALS_MEAS_RATE, + rate_index); +} + +static int bhsfh_prox_rate(struct bhsfh_chip *chip, int mode) +{ + int rate; + + rate = (mode == PROX_ABOVE_THRESHOLD) ? + chip->prox_rate_threshold : chip->prox_rate; + + return i2c_smbus_write_byte_data(chip->client, + BHSFH_PS_MEAS_RATE, + rate); +} + +/* InfraredLED is controlled by the chip during proximity scanning */ +static inline int bhsfh_led_cfg(struct bhsfh_chip *chip) +{ + /* LED cfg, current for leds 1 and 2 */ + return i2c_smbus_write_byte_data(chip->client, + BHSFH_I_LED, + (BHSFH_LED1 << 6) | + (BHSFH_LED_5mA << 3) | + chip->prox_led); +} + +/* + * Following two functions converts raw ps values from HW to normalized + * values. Purpose is to compensate differences between different sensor + * versions and variants so that result means about the same between + * versions. + */ +static inline u8 bhsfh_psraw_to_adjusted(struct bhsfh_chip *chip, u8 psraw) +{ + u16 adjusted; + adjusted = (u16)(((u32)(psraw + chip->prox_const) * chip->prox_coef) / + BHSFH_COEF_SCALER); + if (adjusted > BHSFH_PROX_RANGE) + adjusted = BHSFH_PROX_RANGE; + return adjusted; +} + +static inline u8 bhsfh_psadjusted_to_raw(struct bhsfh_chip *chip, u8 ps) +{ + u16 raw; + + raw = (((u32)ps * BHSFH_COEF_SCALER) / chip->prox_coef); + if (raw > chip->prox_const) + raw = raw - chip->prox_const; + else + raw = 0; + return raw; +} + +/* + * Following two functions converts raw lux values from HW to normalized + * values. Purpose is to compensate differences between different sensor + * versions and variants so that result means about the same between + * versions. Chip->mutex is kept when this is called. + */ +static int bhsfh_prox_set_threshold(struct bhsfh_chip *chip) +{ + u8 tmp = 0; + + /* sysfs may call this when the chip is powered off */ + if (pm_runtime_suspended(&chip->client->dev)) + return 0; + + tmp = bhsfh_psadjusted_to_raw(chip, chip->prox_threshold); + chip->prox_threshold_hw = tmp; + + return i2c_smbus_write_byte_data(chip->client, BHSFH_PS_TH_LED1, + tmp); +} + +static inline u16 bhsfh_lux_raw_to_adjusted(struct bhsfh_chip *chip, u16 raw) +{ + u32 lux; + lux = ((u32)raw * chip->lux_corr) / BHSFH_LUX_CORR_SCALE; + return min(lux, (u32)BHSFH_LUX_RANGE); +} + +static inline u16 bhsfh_lux_adjusted_to_raw(struct bhsfh_chip *chip, + u16 adjusted) +{ + return (u32)adjusted * BHSFH_LUX_CORR_SCALE / chip->lux_corr; +} + +/* chip->mutex is kept when this is called */ +static int bhsfh_lux_update_thresholds(struct bhsfh_chip *chip, + u16 threshold_hi, u16 threshold_lo) +{ + u8 data[4]; + int ret; + + /* sysfs may call this when the chip is powered off */ + if (pm_runtime_suspended(&chip->client->dev)) + return 0; + + /* + * Compensate threshold values with the correction factors if not + * set to minimum or maximum. + * Min & max values disables interrupts. + */ + if (threshold_hi != BHSFH_LUX_RANGE && threshold_hi != 0) + threshold_hi = bhsfh_lux_adjusted_to_raw(chip, threshold_hi); + + if (threshold_lo != BHSFH_LUX_RANGE && threshold_lo != 0) + threshold_lo = bhsfh_lux_adjusted_to_raw(chip, threshold_lo); + + if (chip->lux_thres_hi_onchip == threshold_hi && + chip->lux_thres_lo_onchip == threshold_lo) + return 0; + + chip->lux_thres_hi_onchip = threshold_hi; + chip->lux_thres_lo_onchip = threshold_lo; + + data[0] = threshold_hi; + data[1] = threshold_hi >> 8; + data[2] = threshold_lo; + data[3] = threshold_lo >> 8; + + ret = i2c_smbus_write_i2c_block_data(chip->client, + BHSFH_ALS_TH_UP_0, + ARRAY_SIZE(data), + data); + return ret; +} + +static int bhsfh_lux_get_result(struct bhsfh_chip *chip) +{ + u16 data; + int ret; + + ret = i2c_smbus_read_byte_data(chip->client, BHSFH_ALS_DATA_0); + if (ret < 0) + return ret; + + data = ret & 0xff; + ret = i2c_smbus_read_byte_data(chip->client, BHSFH_ALS_DATA_1); + if (ret < 0) + return ret; + + chip->lux_data_raw = data | ((ret & 0xff) << 8); + + return 0; +} + +/* Calculate correction value which contains chip and device specific parts */ +static u32 bhsfh_get_corr_value(struct bhsfh_chip *chip) +{ + u32 tmp; + /* Impact of glass attenuation correction */ + tmp = (BHSFH_LUX_CORR_SCALE * chip->lux_ga) / BHSFH_LUX_GA_SCALE; + /* Impact of chip factor correction */ + tmp = (tmp * chip->lux_cf) / BHSFH_LUX_CF_SCALE; + /* Impact of Device specific calibration correction */ + tmp = (tmp * chip->lux_calib) / BHSFH_CALIB_SCALER; + return tmp; +} + +static int bhsfh_lux_read_result(struct bhsfh_chip *chip) +{ + bhsfh_lux_get_result(chip); + return bhsfh_lux_raw_to_adjusted(chip, chip->lux_data_raw); +} + +/* + * Chip on / off functions are called while keeping mutex except probe + * or remove phase + */ +static int bhsfh_chip_on(struct bhsfh_chip *chip) +{ + int ret = regulator_bulk_enable(ARRAY_SIZE(chip->regs), + chip->regs); + if (ret < 0) + return ret; + + usleep_range(BHSFH_STARTUP_DELAY, BHSFH_STARTUP_DELAY * 2); + + /* Reset the chip */ + i2c_smbus_write_byte_data(chip->client, BHSFH_ALS_CONTROL, + BHSFH_SWRESET); + usleep_range(BHSFH_RESET_TIME, BHSFH_RESET_TIME * 2); + + /* + * ALS is started always since proximity needs als results + * for realibility estimation. + * Let's assume dark until the first ALS measurement is ready. + */ + chip->lux_data_raw = 0; + ret = i2c_smbus_write_byte_data(chip->client, + BHSFH_ALS_CONTROL, BHSFH_STANDALONE); + + /* Assume reset defaults */ + chip->lux_thres_hi_onchip = BHSFH_LUX_RANGE; + chip->lux_thres_lo_onchip = 0; + + return ret; +} + +static void bhsfh_chip_off(struct bhsfh_chip *chip) +{ + i2c_smbus_write_byte_data(chip->client, + BHSFH_INTERRUPT, BHSFH_DISABLE); + i2c_smbus_write_byte_data(chip->client, + BHSFH_ALS_CONTROL, BHSFH_STANDBY); + i2c_smbus_write_byte_data(chip->client, + BHSFH_PS_CONTROL, BHSFH_STANDBY); + regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs); +} + +/* chip->mutex is kept when this is called */ +static int bhsfh_prox_mode_control(struct bhsfh_chip *chip) +{ + if (chip->prox_enable_count) { + chip->prox_force_update = true; /* Force immediate update */ + + bhsfh_lux_rate(chip, chip->lux_rate_index); + bhsfh_prox_set_threshold(chip); + bhsfh_led_cfg(chip); + bhsfh_prox_rate(chip, PROX_BELOW_THRESHOLD); + bhsfh_prox_interrupt_control(chip, BHSFH_ENABLE); + i2c_smbus_write_byte_data(chip->client, + BHSFH_PS_CONTROL, BHSFH_STANDALONE); + } else { + chip->prox_data = 0; + bhsfh_lux_rate(chip, chip->lux_rate_index); + bhsfh_prox_interrupt_control(chip, BHSFH_DISABLE); + i2c_smbus_write_byte_data(chip->client, + BHSFH_PS_CONTROL, BHSFH_STANDBY); + } + return 0; +} + +static void bhsfh_prox_rate_above(struct bhsfh_chip *chip, int rate) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(prox_rates_hz); i++) + if (rate >= prox_rates_hz[i]) + break; + + if (i > BHSFH_PS_MAX_RATE) + i = BHSFH_PS_MAX_RATE; + + chip->prox_rate_threshold = i; +} + +static void bhsfh_prox_rate_below(struct bhsfh_chip *chip, int rate) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(prox_rates_hz); i++) + if (rate >= prox_rates_hz[i]) + break; + + if (i > BHSFH_PS_MAX_RATE) + i = BHSFH_PS_MAX_RATE; + + chip->prox_rate = i; +} + +/* chip->mutex is kept when this is called */ +static int bhsfh_prox_read_result(struct bhsfh_chip *chip) +{ + int ret; + bool above; + u8 mode; + + ret = i2c_smbus_read_byte_data(chip->client, BHSFH_PS_DATA_LED1); + if (ret < 0) + goto out; + + if (ret > chip->prox_threshold_hw) + above = true; + else + above = false; + + /* + * when ALS levels goes above limit, proximity result may be + * false proximity. Thus ignore the result. With real proximity + * there is a shadow causing low als levels. + */ + if (chip->lux_data_raw > PROX_IGNORE_LUX_LIMIT) + ret = 0; + + chip->prox_data = bhsfh_psraw_to_adjusted(chip, ret); + + /* Strong proximity level or force mode requires immediate response */ + if (chip->prox_data >= chip->prox_abs_thres || + chip->prox_force_update) + chip->prox_persistence_counter = chip->prox_persistence; + + chip->prox_force_update = false; + + /* Persistence filttering to reduce false proximity events */ + if (likely(above)) { + if (chip->prox_persistence_counter < chip->prox_persistence) { + chip->prox_persistence_counter++; + ret = -ENODATA; + } else { + mode = PROX_ABOVE_THRESHOLD; + ret = 0; + } + } else { + chip->prox_persistence_counter = 0; + mode = PROX_BELOW_THRESHOLD; + chip->prox_data = 0; + ret = 0; + } + + /* Set proximity detection rate based on above or below value */ + if (ret == 0) { + bhsfh_prox_rate(chip, mode); + sysfs_notify(&chip->client->dev.kobj, NULL, "prox0_raw"); + } +out: + return ret; +} + +static int bhsfh_detect(struct bhsfh_chip *chip) +{ + struct i2c_client *client = chip->client; + s32 ret; + u8 manu, part; + + ret = i2c_smbus_read_byte_data(client, BHSFH_MANUFACT_ID); + if (ret < 0) + goto error; + manu = (u8)ret; + + ret = i2c_smbus_read_byte_data(client, BHSFH_PART_ID); + if (ret < 0) + goto error; + part = (u8)ret; + + chip->revision = (part & BHSFH_REV_MASK) >> BHSFH_REV_SHIFT; + chip->prox_coef = BHSFH_COEF_SCALER; + chip->prox_const = 0; + chip->lux_cf = BHSFH_NEUTRAL_CF; + + if ((manu == BHSFH_MANUFACT_ROHM) && + ((part & BHSFH_PART_MASK) == BHSFH_PART)) { + snprintf(chip->chipname, sizeof(chip->chipname), "BH1770GLC"); + return 0; + } + + if ((manu == BHSFH_MANUFACT_OSRAM) && + ((part & BHSFH_PART_MASK) == BHSFH_PART)) { + snprintf(chip->chipname, sizeof(chip->chipname), "SFH7770"); + /* Values selected by comparing different versions */ + chip->prox_coef = 819; /* 0.8 * BHSFH_COEF_SCALER */ + chip->prox_const = 40; + return 0; + } + + ret = -ENODEV; +error: + dev_dbg(&client->dev, "BHSFH 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 bhsfh_prox_work(struct work_struct *work) +{ + struct bhsfh_chip *chip = + container_of(work, struct bhsfh_chip, prox_work.work); + + mutex_lock(&chip->mutex); + bhsfh_prox_read_result(chip); + mutex_unlock(&chip->mutex); +} + +/* This is threaded irq handler */ +static irqreturn_t bhsfh_irq(int irq, void *data) +{ + struct bhsfh_chip *chip = data; + int status; + int rate = 0; + + mutex_lock(&chip->mutex); + status = i2c_smbus_read_byte_data(chip->client, BHSFH_ALS_PS_STATUS); + + /* Acknowledge interrupt by reading this register */ + i2c_smbus_read_byte_data(chip->client, BHSFH_INTERRUPT); + + /* + * Check if there is fresh data available for als. + * If this is the very first data, update thresholds after that. + */ + if (status & BHSFH_INT_ALS_DATA) { + bhsfh_lux_get_result(chip); + if (unlikely(chip->lux_wait_result)) { + chip->lux_wait_result = false; + wake_up(&chip->wait); + bhsfh_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, BHSFH_INTERRUPT, + (0 << 1) | (0 << 0)); + + if ((status & BHSFH_INT_ALS_INT)) + sysfs_notify(&chip->client->dev.kobj, NULL, "lux0_input"); + + if (chip->int_mode_prox) + if (status & BHSFH_INT_LEDS_INT) { + rate = prox_rates_ms[chip->prox_rate_threshold]; + bhsfh_prox_read_result(chip); + } + + /* Re-enable interrupt logic */ + i2c_smbus_write_byte_data(chip->client, BHSFH_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 bhsfh_power_state_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + unsigned long value; + size_t ret; + + if (strict_strtoul(buf, 0, &value)) + return -EINVAL; + + mutex_lock(&chip->mutex); + if (value) { + pm_runtime_get_sync(dev); + + ret = bhsfh_lux_rate(chip, chip->lux_rate_index); + ret |= bhsfh_lux_interrupt_control(chip, BHSFH_ENABLE); + + if (ret < 0) { + pm_runtime_put(dev); + goto leave; + } + + /* This causes interrupt after the next measurement cycle */ + bhsfh_lux_update_thresholds(chip, BHSFH_LUX_DEF_THRES, + BHSFH_LUX_DEF_THRES); + /* Inform that we are waiting for a result from ALS */ + chip->lux_wait_result = true; + } else { + if (!pm_runtime_suspended(dev)) + pm_runtime_put(dev); + } + bhsfh_prox_mode_control(chip); + ret = count; +leave: + mutex_unlock(&chip->mutex); + return ret; +} + +static ssize_t bhsfh_power_state_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%d\n", !pm_runtime_suspended(dev)); +} + +static ssize_t bhsfh_lux_result_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct bhsfh_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(BHSFH_TIMEOUT)); + if (!timeout) + return -EIO; + + mutex_lock(&chip->mutex); + ret = sprintf(buf, "%d\n", bhsfh_lux_read_result(chip)); + mutex_unlock(&chip->mutex); + + return ret; +} + +static ssize_t bhsfh_lux_range_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%d\n", BHSFH_LUX_RANGE); +} + +static ssize_t bhsfh_prox_enable_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + unsigned long value; + + if (strict_strtoul(buf, 0, &value)) + return -EINVAL; + + mutex_lock(&chip->mutex); + if (value) { + /* Assume no proximity. Sensor will tell real state soon */ + if (!chip->prox_enable_count) + chip->prox_data = 0; + chip->prox_enable_count++; + } else if (chip->prox_enable_count > 0) { + chip->prox_enable_count--; + } else { + goto leave; + } + /* Run control only when chip is power on */ + if (!pm_runtime_suspended(dev)) + bhsfh_prox_mode_control(chip); +leave: + mutex_unlock(&chip->mutex); + return count; +} + +static ssize_t bhsfh_prox_enable_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct bhsfh_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 bhsfh_prox_result_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct bhsfh_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 bhsfh_prox_range_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%d\n", BHSFH_PROX_RANGE); +} + +static ssize_t bhsfh_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 bhsfh_get_prox_rate_above(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate_threshold]); +} + +static ssize_t bhsfh_get_prox_rate_below(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + return sprintf(buf, "%d\n", prox_rates_hz[chip->prox_rate]); +} + +static ssize_t bhsfh_set_prox_rate_above(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + unsigned long value; + + if (strict_strtoul(buf, 0, &value)) + return -EINVAL; + + mutex_lock(&chip->mutex); + bhsfh_prox_rate_above(chip, value); + mutex_unlock(&chip->mutex); + return count; +} + +static ssize_t bhsfh_set_prox_rate_below(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + unsigned long value; + + if (strict_strtoul(buf, 0, &value)) + return -EINVAL; + + mutex_lock(&chip->mutex); + bhsfh_prox_rate_below(chip, value); + mutex_unlock(&chip->mutex); + return count; +} + +static ssize_t bhsfh_get_prox_thres(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + return sprintf(buf, "%d\n", chip->prox_threshold); +} + +static ssize_t bhsfh_set_prox_thres(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + unsigned long value; + int ret; + + if (strict_strtoul(buf, 0, &value)) + return -EINVAL; + if (value > BHSFH_PROX_RANGE) + return -EINVAL; + + mutex_lock(&chip->mutex); + chip->prox_threshold = value; + ret = bhsfh_prox_set_threshold(chip); + mutex_unlock(&chip->mutex); + if (ret < 0) + return ret; + return count; +} + +static ssize_t bhsfh_prox_persistence_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + + return snprintf(buf, PAGE_SIZE, "%u\n", chip->prox_persistence); +} + +static ssize_t bhsfh_prox_persistence_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + unsigned long value; + + if (strict_strtoul(buf, 0, &value)) + return -EINVAL; + + if (value > BHSFH_PROX_MAX_PERSISTENCE) + return -EINVAL; + + chip->prox_persistence = value; + + return len; +} + +static ssize_t bhsfh_prox_abs_thres_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + return snprintf(buf, PAGE_SIZE, "%u\n", chip->prox_abs_thres); +} + +static ssize_t bhsfh_prox_abs_thres_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + unsigned long value; + + if (strict_strtoul(buf, 0, &value)) + return -EINVAL; + + if (value > BHSFH_PROX_RANGE) + return -EINVAL; + + chip->prox_abs_thres = value; + + return len; +} + +static ssize_t bhsfh_chip_id_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + return sprintf(buf, "%s rev %d\n", chip->chipname, chip->revision); +} + +static ssize_t bhsfh_lux_calib_default_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%u\n", BHSFH_CALIB_SCALER); +} + +static ssize_t bhsfh_lux_calib_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + ssize_t len; + + mutex_lock(&chip->mutex); + len = snprintf(buf, PAGE_SIZE, "%u\n", chip->lux_calib); + mutex_unlock(&chip->mutex); + return len; +} + +static ssize_t bhsfh_lux_calib_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + unsigned long value; + u32 old_calib; + u32 new_corr; + + if (strict_strtoul(buf, 0, &value)) + return -EINVAL; + + mutex_lock(&chip->mutex); + old_calib = chip->lux_calib; + chip->lux_calib = value; + new_corr = bhsfh_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 */ + bhsfh_lux_update_thresholds(chip, chip->lux_threshold_hi, + chip->lux_threshold_lo); + + mutex_unlock(&chip->mutex); + + return len; +} + +static ssize_t bhsfh_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 bhsfh_get_lux_rate(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + return sprintf(buf, "%d\n", lux_rates_hz[chip->lux_rate_index]); +} + +static ssize_t bhsfh_set_lux_rate(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + unsigned long rate_hz; + int ret, i; + + if (strict_strtoul(buf, 0, &rate_hz)) + return -EINVAL; + + mutex_lock(&chip->mutex); + + for (i = 0; i < ARRAY_SIZE(lux_rates_hz); i++) + if (rate_hz >= lux_rates_hz[i]) + break; + + if (i > BHSFH_ALS_MAX_RATE) + i = BHSFH_ALS_MAX_RATE; + + chip->lux_rate_index = i; + ret = bhsfh_lux_rate(chip, i); + mutex_unlock(&chip->mutex); + + if (ret < 0) + return ret; + + return count; +} + +static ssize_t bhsfh_get_lux_thresh_above(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + return sprintf(buf, "%d\n", chip->lux_threshold_hi); +} + +static ssize_t bhsfh_get_lux_thresh_below(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + return sprintf(buf, "%d\n", chip->lux_threshold_lo); +} + +static ssize_t bhsfh_set_lux_thresh(struct bhsfh_chip *chip, u16 *target, + const char *buf) +{ + int ret = 0; + unsigned long thresh; + + if (strict_strtoul(buf, 0, &thresh)) + return -EINVAL; + + if (thresh > BHSFH_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 = bhsfh_lux_update_thresholds(chip, chip->lux_threshold_hi, + chip->lux_threshold_lo); + mutex_unlock(&chip->mutex); + return ret; + +} + +static ssize_t bhsfh_set_lux_thresh_above(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + int ret = bhsfh_set_lux_thresh(chip, &chip->lux_threshold_hi, buf); + if (ret < 0) + return ret; + return len; +} + +static ssize_t bhsfh_set_lux_thresh_below(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct bhsfh_chip *chip = dev_get_drvdata(dev); + int ret = bhsfh_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, bhsfh_prox_enable_show, + bhsfh_prox_enable_store); +static DEVICE_ATTR(prox0_thresh_above1_value, S_IRUGO | S_IWUSR, + bhsfh_prox_abs_thres_show, + bhsfh_prox_abs_thres_store); +static DEVICE_ATTR(prox0_thresh_above0_value, S_IRUGO | S_IWUSR, + bhsfh_get_prox_thres, + bhsfh_set_prox_thres); +static DEVICE_ATTR(prox0_raw, S_IRUGO, bhsfh_prox_result_show, NULL); +static DEVICE_ATTR(prox0_sensor_range, S_IRUGO, bhsfh_prox_range_show, NULL); +static DEVICE_ATTR(prox0_thresh_above_count, S_IRUGO | S_IWUSR, + bhsfh_prox_persistence_show, + bhsfh_prox_persistence_store); +static DEVICE_ATTR(prox0_rate_above, S_IRUGO | S_IWUSR, + bhsfh_get_prox_rate_above, + bhsfh_set_prox_rate_above); +static DEVICE_ATTR(prox0_rate_below, S_IRUGO | S_IWUSR, + bhsfh_get_prox_rate_below, + bhsfh_set_prox_rate_below); +static DEVICE_ATTR(prox0_rate_avail, S_IRUGO, bhsfh_get_prox_rate_avail, NULL); + +static DEVICE_ATTR(lux0_calibscale, S_IRUGO | S_IWUSR, bhsfh_lux_calib_show, + bhsfh_lux_calib_store); +static DEVICE_ATTR(lux0_calibscale_default, S_IRUGO, + bhsfh_lux_calib_default_show, + NULL); +static DEVICE_ATTR(lux0_input, S_IRUGO, bhsfh_lux_result_show, NULL); +static DEVICE_ATTR(lux0_sensor_range, S_IRUGO, bhsfh_lux_range_show, NULL); +static DEVICE_ATTR(lux0_rate, S_IRUGO | S_IWUSR, bhsfh_get_lux_rate, + bhsfh_set_lux_rate); +static DEVICE_ATTR(lux0_rate_avail, S_IRUGO, bhsfh_get_lux_rate_avail, NULL); +static DEVICE_ATTR(lux0_thresh_above_value, S_IRUGO | S_IWUSR, + bhsfh_get_lux_thresh_above, + bhsfh_set_lux_thresh_above); +static DEVICE_ATTR(lux0_thresh_below_value, S_IRUGO | S_IWUSR, + bhsfh_get_lux_thresh_below, + bhsfh_set_lux_thresh_below); +static DEVICE_ATTR(chip_id, S_IRUGO, bhsfh_chip_id_show, NULL); +static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, bhsfh_power_state_show, + bhsfh_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 struct attribute_group bhsfh_attribute_group = { + .attrs = sysfs_attrs +}; + +static int __devinit bhsfh_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct bhsfh_chip *chip; + int err; + + chip = kzalloc(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, bhsfh_prox_work); + + if (client->dev.platform_data == NULL) { + dev_err(&client->dev, "platform data is mandatory\n"); + err = -EINVAL; + goto fail1; + } + + chip->pdata = client->dev.platform_data; + chip->lux_calib = BHSFH_LUX_NEUTRAL_CALIB_VALUE; + chip->lux_rate_index = BHSFH_LUX_DEFAULT_RATE; + chip->lux_threshold_lo = BHSFH_LUX_DEF_THRES; + chip->lux_threshold_hi = BHSFH_LUX_DEF_THRES; + + if (chip->pdata->glass_attenuation == 0) + chip->lux_ga = BHFSH_NEUTRAL_GA; + else + chip->lux_ga = chip->pdata->glass_attenuation; + + chip->prox_threshold = BHSFH_PROX_DEF_THRES; + chip->prox_led = chip->pdata->led_def_curr; + chip->prox_abs_thres = BHSFH_PROX_DEF_ABS_THRES; + chip->prox_persistence = BHSFH_DEFAULT_PERSISTENCE; + chip->prox_data = 0; + + + bhsfh_prox_rate_below(chip, BHSFH_PROX_DEFAULT_RATE); + bhsfh_prox_rate_above(chip, BHSFH_PROX_DEF_RATE_THRESH); + + chip->regs[0].supply = reg_vcc; + chip->regs[1].supply = reg_vleds; + + 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(BHSFH_STARTUP_DELAY, BHSFH_STARTUP_DELAY * 2); + err = bhsfh_detect(chip); + if (err < 0) + goto fail3; + + /* Start chip */ + bhsfh_chip_on(chip); + pm_runtime_set_active(&client->dev); + pm_runtime_enable(&client->dev); + + chip->lux_corr = bhsfh_get_corr_value(chip); + if (chip->lux_corr == 0) { + dev_err(&client->dev, "Improper correction values\n"); + err = -EINVAL; + goto fail3; + } + + if (chip->pdata->setup_resources) { + err = chip->pdata->setup_resources(); + if (err) { + err = -EINVAL; + goto fail3; + } + } + + err = sysfs_create_group(&chip->client->dev.kobj, + &bhsfh_attribute_group); + if (err < 0) { + dev_err(&chip->client->dev, "Sysfs registration failed\n"); + goto fail4; + } + + /* + * 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, + bhsfh_irq, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT | + IRQF_TRIGGER_LOW, + "bhsfh", chip); + if (err) { + dev_err(&client->dev, "could not get IRQ %d\n", + client->irq); + goto fail5; + } + regulator_bulk_disable(ARRAY_SIZE(chip->regs), chip->regs); + return err; +fail5: + sysfs_remove_group(&chip->client->dev.kobj, + &bhsfh_attribute_group); +fail4: + if (chip->pdata->release_resources) + chip->pdata->release_resources(); +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 int __devexit bhsfh_remove(struct i2c_client *client) +{ + struct bhsfh_chip *chip = i2c_get_clientdata(client); + + free_irq(client->irq, chip); + + sysfs_remove_group(&chip->client->dev.kobj, + &bhsfh_attribute_group); + + if (chip->pdata->release_resources) + chip->pdata->release_resources(); + + cancel_delayed_work_sync(&chip->prox_work); + + if (!pm_runtime_suspended(&client->dev)) + bhsfh_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); + return 0; +} + +#ifdef CONFIG_PM +static int bhsfh_suspend(struct device *dev) +{ + struct i2c_client *client = container_of(dev, struct i2c_client, dev); + struct bhsfh_chip *chip = i2c_get_clientdata(client); + + bhsfh_chip_off(chip); + + return 0; +} + +static int bhsfh_resume(struct device *dev) +{ + struct i2c_client *client = container_of(dev, struct i2c_client, dev); + struct bhsfh_chip *chip = i2c_get_clientdata(client); + int ret = 0; + + bhsfh_chip_on(chip); + + if (!pm_runtime_suspended(dev)) { + /* + * If we were enabled at suspend time, it is expected + * everything works nice and smoothly + */ + ret = bhsfh_lux_rate(chip, chip->lux_rate_index); + ret |= bhsfh_lux_interrupt_control(chip, BHSFH_ENABLE); + + /* This causes interrupt after the next measurement cycle */ + bhsfh_lux_update_thresholds(chip, BHSFH_LUX_DEF_THRES, + BHSFH_LUX_DEF_THRES); + /* Inform that we are waiting for a result from ALS */ + chip->lux_wait_result = true; + bhsfh_prox_mode_control(chip); + } + return ret; +} + +#else +#define bhsfh_suspend NULL +#define bhsfh_shutdown NULL +#define bhsfh_resume NULL +#endif + +#ifdef CONFIG_PM_RUNTIME +static int bhsfh_runtime_suspend(struct device *dev) +{ + struct i2c_client *client = container_of(dev, struct i2c_client, dev); + struct bhsfh_chip *chip = i2c_get_clientdata(client); + + bhsfh_chip_off(chip); + + return 0; +} + +static int bhsfh_runtime_resume(struct device *dev) +{ + struct i2c_client *client = container_of(dev, struct i2c_client, dev); + struct bhsfh_chip *chip = i2c_get_clientdata(client); + + bhsfh_chip_on(chip); + + return 0; +} +#endif + +static const struct i2c_device_id bhsfh_id[] = { + {"bh1770glc", 0 }, + {"sfh7770", 0 }, + {} +}; + +MODULE_DEVICE_TABLE(i2c, bhsfh_id); + +static const struct dev_pm_ops bhsfh_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(bhsfh_suspend, bhsfh_resume) + SET_RUNTIME_PM_OPS(bhsfh_runtime_suspend, bhsfh_runtime_resume, NULL) +}; + +static struct i2c_driver bhsfh_driver = { + .driver = { + .name = "bhsfh", + .owner = THIS_MODULE, + .pm = &bhsfh_pm_ops, + }, + .probe = bhsfh_probe, + .remove = __devexit_p(bhsfh_remove), + .id_table = bhsfh_id, +}; + +static int __init bhsfh_init(void) +{ + return i2c_add_driver(&bhsfh_driver); +} + +static void __exit bhsfh_exit(void) +{ + i2c_del_driver(&bhsfh_driver); +} + +MODULE_DESCRIPTION("BH1770GLC / SFH7770 combined ALS and proximity sensor"); +MODULE_AUTHOR("Samu Onkalo, Nokia Corporation"); +MODULE_LICENSE("GPL v2"); + +module_init(bhsfh_init); +module_exit(bhsfh_exit); diff --git a/include/linux/i2c/bhsfh.h b/include/linux/i2c/bhsfh.h new file mode 100644 index 0000000..a19e791 --- /dev/null +++ b/include/linux/i2c/bhsfh.h @@ -0,0 +1,42 @@ +/* + * This file is part of the ROHM BH1770GLC / OSRAM SFH7770 sensor driver. + * Chip is combined proximity and ambient light sensor. + * + * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). + * + * Contact: Samu Onkalo <[email protected]> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#ifndef __BHSFH_H__ +#define __BHSFH_H__ + +struct bhsfh_platform_data { +#define BHSFH_LED_5mA 0 +#define BHSFH_LED_10mA 1 +#define BHSFH_LED_20mA 2 +#define BHSFH_LED_50mA 3 +#define BHSFH_LED_100mA 4 +#define BHSFH_LED_150mA 5 +#define BHSFH_LED_200mA 6 + __u8 led_def_curr; +#define BHFSH_NEUTRAL_GA 16384 /* 16384 / 16384 = 1 */ + __u32 glass_attenuation; + int (*setup_resources)(void); + int (*release_resources)(void); +}; +#endif -- 1.6.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
