forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1592 lines
38 KiB
1592 lines
38 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* ltr501.c - Support for Lite-On LTR501 ambient light and proximity sensor |
|
* |
|
* Copyright 2014 Peter Meerwald <[email protected]> |
|
* |
|
* 7-bit I2C slave address 0x23 |
|
* |
|
* TODO: IR LED characteristics |
|
*/ |
|
|
|
#include <linux/module.h> |
|
#include <linux/i2c.h> |
|
#include <linux/err.h> |
|
#include <linux/delay.h> |
|
#include <linux/regmap.h> |
|
#include <linux/acpi.h> |
|
|
|
#include <linux/iio/iio.h> |
|
#include <linux/iio/events.h> |
|
#include <linux/iio/sysfs.h> |
|
#include <linux/iio/trigger_consumer.h> |
|
#include <linux/iio/buffer.h> |
|
#include <linux/iio/triggered_buffer.h> |
|
|
|
#define LTR501_DRV_NAME "ltr501" |
|
|
|
#define LTR501_ALS_CONTR 0x80 /* ALS operation mode, SW reset */ |
|
#define LTR501_PS_CONTR 0x81 /* PS operation mode */ |
|
#define LTR501_PS_MEAS_RATE 0x84 /* measurement rate*/ |
|
#define LTR501_ALS_MEAS_RATE 0x85 /* ALS integ time, measurement rate*/ |
|
#define LTR501_PART_ID 0x86 |
|
#define LTR501_MANUFAC_ID 0x87 |
|
#define LTR501_ALS_DATA1 0x88 /* 16-bit, little endian */ |
|
#define LTR501_ALS_DATA0 0x8a /* 16-bit, little endian */ |
|
#define LTR501_ALS_PS_STATUS 0x8c |
|
#define LTR501_PS_DATA 0x8d /* 16-bit, little endian */ |
|
#define LTR501_INTR 0x8f /* output mode, polarity, mode */ |
|
#define LTR501_PS_THRESH_UP 0x90 /* 11 bit, ps upper threshold */ |
|
#define LTR501_PS_THRESH_LOW 0x92 /* 11 bit, ps lower threshold */ |
|
#define LTR501_ALS_THRESH_UP 0x97 /* 16 bit, ALS upper threshold */ |
|
#define LTR501_ALS_THRESH_LOW 0x99 /* 16 bit, ALS lower threshold */ |
|
#define LTR501_INTR_PRST 0x9e /* ps thresh, als thresh */ |
|
#define LTR501_MAX_REG 0x9f |
|
|
|
#define LTR501_ALS_CONTR_SW_RESET BIT(2) |
|
#define LTR501_CONTR_PS_GAIN_MASK (BIT(3) | BIT(2)) |
|
#define LTR501_CONTR_PS_GAIN_SHIFT 2 |
|
#define LTR501_CONTR_ALS_GAIN_MASK BIT(3) |
|
#define LTR501_CONTR_ACTIVE BIT(1) |
|
|
|
#define LTR501_STATUS_ALS_INTR BIT(3) |
|
#define LTR501_STATUS_ALS_RDY BIT(2) |
|
#define LTR501_STATUS_PS_INTR BIT(1) |
|
#define LTR501_STATUS_PS_RDY BIT(0) |
|
|
|
#define LTR501_PS_DATA_MASK 0x7ff |
|
#define LTR501_PS_THRESH_MASK 0x7ff |
|
#define LTR501_ALS_THRESH_MASK 0xffff |
|
|
|
#define LTR501_ALS_DEF_PERIOD 500000 |
|
#define LTR501_PS_DEF_PERIOD 100000 |
|
|
|
#define LTR501_REGMAP_NAME "ltr501_regmap" |
|
|
|
#define LTR501_LUX_CONV(vis_coeff, vis_data, ir_coeff, ir_data) \ |
|
((vis_coeff * vis_data) - (ir_coeff * ir_data)) |
|
|
|
static const int int_time_mapping[] = {100000, 50000, 200000, 400000}; |
|
|
|
static const struct reg_field reg_field_it = |
|
REG_FIELD(LTR501_ALS_MEAS_RATE, 3, 4); |
|
static const struct reg_field reg_field_als_intr = |
|
REG_FIELD(LTR501_INTR, 1, 1); |
|
static const struct reg_field reg_field_ps_intr = |
|
REG_FIELD(LTR501_INTR, 0, 0); |
|
static const struct reg_field reg_field_als_rate = |
|
REG_FIELD(LTR501_ALS_MEAS_RATE, 0, 2); |
|
static const struct reg_field reg_field_ps_rate = |
|
REG_FIELD(LTR501_PS_MEAS_RATE, 0, 3); |
|
static const struct reg_field reg_field_als_prst = |
|
REG_FIELD(LTR501_INTR_PRST, 0, 3); |
|
static const struct reg_field reg_field_ps_prst = |
|
REG_FIELD(LTR501_INTR_PRST, 4, 7); |
|
|
|
struct ltr501_samp_table { |
|
int freq_val; /* repetition frequency in micro HZ*/ |
|
int time_val; /* repetition rate in micro seconds */ |
|
}; |
|
|
|
#define LTR501_RESERVED_GAIN -1 |
|
|
|
enum { |
|
ltr501 = 0, |
|
ltr559, |
|
ltr301, |
|
}; |
|
|
|
struct ltr501_gain { |
|
int scale; |
|
int uscale; |
|
}; |
|
|
|
static const struct ltr501_gain ltr501_als_gain_tbl[] = { |
|
{1, 0}, |
|
{0, 5000}, |
|
}; |
|
|
|
static const struct ltr501_gain ltr559_als_gain_tbl[] = { |
|
{1, 0}, |
|
{0, 500000}, |
|
{0, 250000}, |
|
{0, 125000}, |
|
{LTR501_RESERVED_GAIN, LTR501_RESERVED_GAIN}, |
|
{LTR501_RESERVED_GAIN, LTR501_RESERVED_GAIN}, |
|
{0, 20000}, |
|
{0, 10000}, |
|
}; |
|
|
|
static const struct ltr501_gain ltr501_ps_gain_tbl[] = { |
|
{1, 0}, |
|
{0, 250000}, |
|
{0, 125000}, |
|
{0, 62500}, |
|
}; |
|
|
|
static const struct ltr501_gain ltr559_ps_gain_tbl[] = { |
|
{0, 62500}, /* x16 gain */ |
|
{0, 31250}, /* x32 gain */ |
|
{0, 15625}, /* bits X1 are for x64 gain */ |
|
{0, 15624}, |
|
}; |
|
|
|
struct ltr501_chip_info { |
|
u8 partid; |
|
const struct ltr501_gain *als_gain; |
|
int als_gain_tbl_size; |
|
const struct ltr501_gain *ps_gain; |
|
int ps_gain_tbl_size; |
|
u8 als_mode_active; |
|
u8 als_gain_mask; |
|
u8 als_gain_shift; |
|
struct iio_chan_spec const *channels; |
|
const int no_channels; |
|
const struct iio_info *info; |
|
const struct iio_info *info_no_irq; |
|
}; |
|
|
|
struct ltr501_data { |
|
struct i2c_client *client; |
|
struct mutex lock_als, lock_ps; |
|
struct ltr501_chip_info *chip_info; |
|
u8 als_contr, ps_contr; |
|
int als_period, ps_period; /* period in micro seconds */ |
|
struct regmap *regmap; |
|
struct regmap_field *reg_it; |
|
struct regmap_field *reg_als_intr; |
|
struct regmap_field *reg_ps_intr; |
|
struct regmap_field *reg_als_rate; |
|
struct regmap_field *reg_ps_rate; |
|
struct regmap_field *reg_als_prst; |
|
struct regmap_field *reg_ps_prst; |
|
}; |
|
|
|
static const struct ltr501_samp_table ltr501_als_samp_table[] = { |
|
{20000000, 50000}, {10000000, 100000}, |
|
{5000000, 200000}, {2000000, 500000}, |
|
{1000000, 1000000}, {500000, 2000000}, |
|
{500000, 2000000}, {500000, 2000000} |
|
}; |
|
|
|
static const struct ltr501_samp_table ltr501_ps_samp_table[] = { |
|
{20000000, 50000}, {14285714, 70000}, |
|
{10000000, 100000}, {5000000, 200000}, |
|
{2000000, 500000}, {1000000, 1000000}, |
|
{500000, 2000000}, {500000, 2000000}, |
|
{500000, 2000000} |
|
}; |
|
|
|
static int ltr501_match_samp_freq(const struct ltr501_samp_table *tab, |
|
int len, int val, int val2) |
|
{ |
|
int i, freq; |
|
|
|
freq = val * 1000000 + val2; |
|
|
|
for (i = 0; i < len; i++) { |
|
if (tab[i].freq_val == freq) |
|
return i; |
|
} |
|
|
|
return -EINVAL; |
|
} |
|
|
|
static int ltr501_als_read_samp_freq(const struct ltr501_data *data, |
|
int *val, int *val2) |
|
{ |
|
int ret, i; |
|
|
|
ret = regmap_field_read(data->reg_als_rate, &i); |
|
if (ret < 0) |
|
return ret; |
|
|
|
if (i < 0 || i >= ARRAY_SIZE(ltr501_als_samp_table)) |
|
return -EINVAL; |
|
|
|
*val = ltr501_als_samp_table[i].freq_val / 1000000; |
|
*val2 = ltr501_als_samp_table[i].freq_val % 1000000; |
|
|
|
return IIO_VAL_INT_PLUS_MICRO; |
|
} |
|
|
|
static int ltr501_ps_read_samp_freq(const struct ltr501_data *data, |
|
int *val, int *val2) |
|
{ |
|
int ret, i; |
|
|
|
ret = regmap_field_read(data->reg_ps_rate, &i); |
|
if (ret < 0) |
|
return ret; |
|
|
|
if (i < 0 || i >= ARRAY_SIZE(ltr501_ps_samp_table)) |
|
return -EINVAL; |
|
|
|
*val = ltr501_ps_samp_table[i].freq_val / 1000000; |
|
*val2 = ltr501_ps_samp_table[i].freq_val % 1000000; |
|
|
|
return IIO_VAL_INT_PLUS_MICRO; |
|
} |
|
|
|
static int ltr501_als_write_samp_freq(struct ltr501_data *data, |
|
int val, int val2) |
|
{ |
|
int i, ret; |
|
|
|
i = ltr501_match_samp_freq(ltr501_als_samp_table, |
|
ARRAY_SIZE(ltr501_als_samp_table), |
|
val, val2); |
|
|
|
if (i < 0) |
|
return i; |
|
|
|
mutex_lock(&data->lock_als); |
|
ret = regmap_field_write(data->reg_als_rate, i); |
|
mutex_unlock(&data->lock_als); |
|
|
|
return ret; |
|
} |
|
|
|
static int ltr501_ps_write_samp_freq(struct ltr501_data *data, |
|
int val, int val2) |
|
{ |
|
int i, ret; |
|
|
|
i = ltr501_match_samp_freq(ltr501_ps_samp_table, |
|
ARRAY_SIZE(ltr501_ps_samp_table), |
|
val, val2); |
|
|
|
if (i < 0) |
|
return i; |
|
|
|
mutex_lock(&data->lock_ps); |
|
ret = regmap_field_write(data->reg_ps_rate, i); |
|
mutex_unlock(&data->lock_ps); |
|
|
|
return ret; |
|
} |
|
|
|
static int ltr501_als_read_samp_period(const struct ltr501_data *data, int *val) |
|
{ |
|
int ret, i; |
|
|
|
ret = regmap_field_read(data->reg_als_rate, &i); |
|
if (ret < 0) |
|
return ret; |
|
|
|
if (i < 0 || i >= ARRAY_SIZE(ltr501_als_samp_table)) |
|
return -EINVAL; |
|
|
|
*val = ltr501_als_samp_table[i].time_val; |
|
|
|
return IIO_VAL_INT; |
|
} |
|
|
|
static int ltr501_ps_read_samp_period(const struct ltr501_data *data, int *val) |
|
{ |
|
int ret, i; |
|
|
|
ret = regmap_field_read(data->reg_ps_rate, &i); |
|
if (ret < 0) |
|
return ret; |
|
|
|
if (i < 0 || i >= ARRAY_SIZE(ltr501_ps_samp_table)) |
|
return -EINVAL; |
|
|
|
*val = ltr501_ps_samp_table[i].time_val; |
|
|
|
return IIO_VAL_INT; |
|
} |
|
|
|
/* IR and visible spectrum coeff's are given in data sheet */ |
|
static unsigned long ltr501_calculate_lux(u16 vis_data, u16 ir_data) |
|
{ |
|
unsigned long ratio, lux; |
|
|
|
if (vis_data == 0) |
|
return 0; |
|
|
|
/* multiply numerator by 100 to avoid handling ratio < 1 */ |
|
ratio = DIV_ROUND_UP(ir_data * 100, ir_data + vis_data); |
|
|
|
if (ratio < 45) |
|
lux = LTR501_LUX_CONV(1774, vis_data, -1105, ir_data); |
|
else if (ratio >= 45 && ratio < 64) |
|
lux = LTR501_LUX_CONV(3772, vis_data, 1336, ir_data); |
|
else if (ratio >= 64 && ratio < 85) |
|
lux = LTR501_LUX_CONV(1690, vis_data, 169, ir_data); |
|
else |
|
lux = 0; |
|
|
|
return lux / 1000; |
|
} |
|
|
|
static int ltr501_drdy(const struct ltr501_data *data, u8 drdy_mask) |
|
{ |
|
int tries = 100; |
|
int ret, status; |
|
|
|
while (tries--) { |
|
ret = regmap_read(data->regmap, LTR501_ALS_PS_STATUS, &status); |
|
if (ret < 0) |
|
return ret; |
|
if ((status & drdy_mask) == drdy_mask) |
|
return 0; |
|
msleep(25); |
|
} |
|
|
|
dev_err(&data->client->dev, "ltr501_drdy() failed, data not ready\n"); |
|
return -EIO; |
|
} |
|
|
|
static int ltr501_set_it_time(struct ltr501_data *data, int it) |
|
{ |
|
int ret, i, index = -1, status; |
|
|
|
for (i = 0; i < ARRAY_SIZE(int_time_mapping); i++) { |
|
if (int_time_mapping[i] == it) { |
|
index = i; |
|
break; |
|
} |
|
} |
|
/* Make sure integ time index is valid */ |
|
if (index < 0) |
|
return -EINVAL; |
|
|
|
ret = regmap_read(data->regmap, LTR501_ALS_CONTR, &status); |
|
if (ret < 0) |
|
return ret; |
|
|
|
if (status & LTR501_CONTR_ALS_GAIN_MASK) { |
|
/* |
|
* 200 ms and 400 ms integ time can only be |
|
* used in dynamic range 1 |
|
*/ |
|
if (index > 1) |
|
return -EINVAL; |
|
} else |
|
/* 50 ms integ time can only be used in dynamic range 2 */ |
|
if (index == 1) |
|
return -EINVAL; |
|
|
|
return regmap_field_write(data->reg_it, index); |
|
} |
|
|
|
/* read int time in micro seconds */ |
|
static int ltr501_read_it_time(const struct ltr501_data *data, |
|
int *val, int *val2) |
|
{ |
|
int ret, index; |
|
|
|
ret = regmap_field_read(data->reg_it, &index); |
|
if (ret < 0) |
|
return ret; |
|
|
|
/* Make sure integ time index is valid */ |
|
if (index < 0 || index >= ARRAY_SIZE(int_time_mapping)) |
|
return -EINVAL; |
|
|
|
*val2 = int_time_mapping[index]; |
|
*val = 0; |
|
|
|
return IIO_VAL_INT_PLUS_MICRO; |
|
} |
|
|
|
static int ltr501_read_als(const struct ltr501_data *data, __le16 buf[2]) |
|
{ |
|
int ret; |
|
|
|
ret = ltr501_drdy(data, LTR501_STATUS_ALS_RDY); |
|
if (ret < 0) |
|
return ret; |
|
/* always read both ALS channels in given order */ |
|
return regmap_bulk_read(data->regmap, LTR501_ALS_DATA1, |
|
buf, 2 * sizeof(__le16)); |
|
} |
|
|
|
static int ltr501_read_ps(const struct ltr501_data *data) |
|
{ |
|
int ret, status; |
|
|
|
ret = ltr501_drdy(data, LTR501_STATUS_PS_RDY); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ret = regmap_bulk_read(data->regmap, LTR501_PS_DATA, |
|
&status, 2); |
|
if (ret < 0) |
|
return ret; |
|
|
|
return status; |
|
} |
|
|
|
static int ltr501_read_intr_prst(const struct ltr501_data *data, |
|
enum iio_chan_type type, |
|
int *val2) |
|
{ |
|
int ret, samp_period, prst; |
|
|
|
switch (type) { |
|
case IIO_INTENSITY: |
|
ret = regmap_field_read(data->reg_als_prst, &prst); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ret = ltr501_als_read_samp_period(data, &samp_period); |
|
|
|
if (ret < 0) |
|
return ret; |
|
*val2 = samp_period * prst; |
|
return IIO_VAL_INT_PLUS_MICRO; |
|
case IIO_PROXIMITY: |
|
ret = regmap_field_read(data->reg_ps_prst, &prst); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ret = ltr501_ps_read_samp_period(data, &samp_period); |
|
|
|
if (ret < 0) |
|
return ret; |
|
|
|
*val2 = samp_period * prst; |
|
return IIO_VAL_INT_PLUS_MICRO; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return -EINVAL; |
|
} |
|
|
|
static int ltr501_write_intr_prst(struct ltr501_data *data, |
|
enum iio_chan_type type, |
|
int val, int val2) |
|
{ |
|
int ret, samp_period, new_val; |
|
unsigned long period; |
|
|
|
if (val < 0 || val2 < 0) |
|
return -EINVAL; |
|
|
|
/* period in microseconds */ |
|
period = ((val * 1000000) + val2); |
|
|
|
switch (type) { |
|
case IIO_INTENSITY: |
|
ret = ltr501_als_read_samp_period(data, &samp_period); |
|
if (ret < 0) |
|
return ret; |
|
|
|
/* period should be atleast equal to sampling period */ |
|
if (period < samp_period) |
|
return -EINVAL; |
|
|
|
new_val = DIV_ROUND_UP(period, samp_period); |
|
if (new_val < 0 || new_val > 0x0f) |
|
return -EINVAL; |
|
|
|
mutex_lock(&data->lock_als); |
|
ret = regmap_field_write(data->reg_als_prst, new_val); |
|
mutex_unlock(&data->lock_als); |
|
if (ret >= 0) |
|
data->als_period = period; |
|
|
|
return ret; |
|
case IIO_PROXIMITY: |
|
ret = ltr501_ps_read_samp_period(data, &samp_period); |
|
if (ret < 0) |
|
return ret; |
|
|
|
/* period should be atleast equal to rate */ |
|
if (period < samp_period) |
|
return -EINVAL; |
|
|
|
new_val = DIV_ROUND_UP(period, samp_period); |
|
if (new_val < 0 || new_val > 0x0f) |
|
return -EINVAL; |
|
|
|
mutex_lock(&data->lock_ps); |
|
ret = regmap_field_write(data->reg_ps_prst, new_val); |
|
mutex_unlock(&data->lock_ps); |
|
if (ret >= 0) |
|
data->ps_period = period; |
|
|
|
return ret; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return -EINVAL; |
|
} |
|
|
|
static const struct iio_event_spec ltr501_als_event_spec[] = { |
|
{ |
|
.type = IIO_EV_TYPE_THRESH, |
|
.dir = IIO_EV_DIR_RISING, |
|
.mask_separate = BIT(IIO_EV_INFO_VALUE), |
|
}, { |
|
.type = IIO_EV_TYPE_THRESH, |
|
.dir = IIO_EV_DIR_FALLING, |
|
.mask_separate = BIT(IIO_EV_INFO_VALUE), |
|
}, { |
|
.type = IIO_EV_TYPE_THRESH, |
|
.dir = IIO_EV_DIR_EITHER, |
|
.mask_separate = BIT(IIO_EV_INFO_ENABLE) | |
|
BIT(IIO_EV_INFO_PERIOD), |
|
}, |
|
|
|
}; |
|
|
|
static const struct iio_event_spec ltr501_pxs_event_spec[] = { |
|
{ |
|
.type = IIO_EV_TYPE_THRESH, |
|
.dir = IIO_EV_DIR_RISING, |
|
.mask_separate = BIT(IIO_EV_INFO_VALUE), |
|
}, { |
|
.type = IIO_EV_TYPE_THRESH, |
|
.dir = IIO_EV_DIR_FALLING, |
|
.mask_separate = BIT(IIO_EV_INFO_VALUE), |
|
}, { |
|
.type = IIO_EV_TYPE_THRESH, |
|
.dir = IIO_EV_DIR_EITHER, |
|
.mask_separate = BIT(IIO_EV_INFO_ENABLE) | |
|
BIT(IIO_EV_INFO_PERIOD), |
|
}, |
|
}; |
|
|
|
#define LTR501_INTENSITY_CHANNEL(_idx, _addr, _mod, _shared, \ |
|
_evspec, _evsize) { \ |
|
.type = IIO_INTENSITY, \ |
|
.modified = 1, \ |
|
.address = (_addr), \ |
|
.channel2 = (_mod), \ |
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ |
|
.info_mask_shared_by_type = (_shared), \ |
|
.scan_index = (_idx), \ |
|
.scan_type = { \ |
|
.sign = 'u', \ |
|
.realbits = 16, \ |
|
.storagebits = 16, \ |
|
.endianness = IIO_CPU, \ |
|
}, \ |
|
.event_spec = _evspec,\ |
|
.num_event_specs = _evsize,\ |
|
} |
|
|
|
#define LTR501_LIGHT_CHANNEL() { \ |
|
.type = IIO_LIGHT, \ |
|
.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \ |
|
.scan_index = -1, \ |
|
} |
|
|
|
static const struct iio_chan_spec ltr501_channels[] = { |
|
LTR501_LIGHT_CHANNEL(), |
|
LTR501_INTENSITY_CHANNEL(0, LTR501_ALS_DATA0, IIO_MOD_LIGHT_BOTH, 0, |
|
ltr501_als_event_spec, |
|
ARRAY_SIZE(ltr501_als_event_spec)), |
|
LTR501_INTENSITY_CHANNEL(1, LTR501_ALS_DATA1, IIO_MOD_LIGHT_IR, |
|
BIT(IIO_CHAN_INFO_SCALE) | |
|
BIT(IIO_CHAN_INFO_INT_TIME) | |
|
BIT(IIO_CHAN_INFO_SAMP_FREQ), |
|
NULL, 0), |
|
{ |
|
.type = IIO_PROXIMITY, |
|
.address = LTR501_PS_DATA, |
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | |
|
BIT(IIO_CHAN_INFO_SCALE), |
|
.scan_index = 2, |
|
.scan_type = { |
|
.sign = 'u', |
|
.realbits = 11, |
|
.storagebits = 16, |
|
.endianness = IIO_CPU, |
|
}, |
|
.event_spec = ltr501_pxs_event_spec, |
|
.num_event_specs = ARRAY_SIZE(ltr501_pxs_event_spec), |
|
}, |
|
IIO_CHAN_SOFT_TIMESTAMP(3), |
|
}; |
|
|
|
static const struct iio_chan_spec ltr301_channels[] = { |
|
LTR501_LIGHT_CHANNEL(), |
|
LTR501_INTENSITY_CHANNEL(0, LTR501_ALS_DATA0, IIO_MOD_LIGHT_BOTH, 0, |
|
ltr501_als_event_spec, |
|
ARRAY_SIZE(ltr501_als_event_spec)), |
|
LTR501_INTENSITY_CHANNEL(1, LTR501_ALS_DATA1, IIO_MOD_LIGHT_IR, |
|
BIT(IIO_CHAN_INFO_SCALE) | |
|
BIT(IIO_CHAN_INFO_INT_TIME) | |
|
BIT(IIO_CHAN_INFO_SAMP_FREQ), |
|
NULL, 0), |
|
IIO_CHAN_SOFT_TIMESTAMP(2), |
|
}; |
|
|
|
static int ltr501_read_raw(struct iio_dev *indio_dev, |
|
struct iio_chan_spec const *chan, |
|
int *val, int *val2, long mask) |
|
{ |
|
struct ltr501_data *data = iio_priv(indio_dev); |
|
__le16 buf[2]; |
|
int ret, i; |
|
|
|
switch (mask) { |
|
case IIO_CHAN_INFO_PROCESSED: |
|
switch (chan->type) { |
|
case IIO_LIGHT: |
|
ret = iio_device_claim_direct_mode(indio_dev); |
|
if (ret) |
|
return ret; |
|
|
|
mutex_lock(&data->lock_als); |
|
ret = ltr501_read_als(data, buf); |
|
mutex_unlock(&data->lock_als); |
|
iio_device_release_direct_mode(indio_dev); |
|
if (ret < 0) |
|
return ret; |
|
*val = ltr501_calculate_lux(le16_to_cpu(buf[1]), |
|
le16_to_cpu(buf[0])); |
|
return IIO_VAL_INT; |
|
default: |
|
return -EINVAL; |
|
} |
|
case IIO_CHAN_INFO_RAW: |
|
ret = iio_device_claim_direct_mode(indio_dev); |
|
if (ret) |
|
return ret; |
|
|
|
switch (chan->type) { |
|
case IIO_INTENSITY: |
|
mutex_lock(&data->lock_als); |
|
ret = ltr501_read_als(data, buf); |
|
mutex_unlock(&data->lock_als); |
|
if (ret < 0) |
|
break; |
|
*val = le16_to_cpu(chan->address == LTR501_ALS_DATA1 ? |
|
buf[0] : buf[1]); |
|
ret = IIO_VAL_INT; |
|
break; |
|
case IIO_PROXIMITY: |
|
mutex_lock(&data->lock_ps); |
|
ret = ltr501_read_ps(data); |
|
mutex_unlock(&data->lock_ps); |
|
if (ret < 0) |
|
break; |
|
*val = ret & LTR501_PS_DATA_MASK; |
|
ret = IIO_VAL_INT; |
|
break; |
|
default: |
|
ret = -EINVAL; |
|
break; |
|
} |
|
|
|
iio_device_release_direct_mode(indio_dev); |
|
return ret; |
|
|
|
case IIO_CHAN_INFO_SCALE: |
|
switch (chan->type) { |
|
case IIO_INTENSITY: |
|
i = (data->als_contr & data->chip_info->als_gain_mask) |
|
>> data->chip_info->als_gain_shift; |
|
*val = data->chip_info->als_gain[i].scale; |
|
*val2 = data->chip_info->als_gain[i].uscale; |
|
return IIO_VAL_INT_PLUS_MICRO; |
|
case IIO_PROXIMITY: |
|
i = (data->ps_contr & LTR501_CONTR_PS_GAIN_MASK) >> |
|
LTR501_CONTR_PS_GAIN_SHIFT; |
|
*val = data->chip_info->ps_gain[i].scale; |
|
*val2 = data->chip_info->ps_gain[i].uscale; |
|
return IIO_VAL_INT_PLUS_MICRO; |
|
default: |
|
return -EINVAL; |
|
} |
|
case IIO_CHAN_INFO_INT_TIME: |
|
switch (chan->type) { |
|
case IIO_INTENSITY: |
|
return ltr501_read_it_time(data, val, val2); |
|
default: |
|
return -EINVAL; |
|
} |
|
case IIO_CHAN_INFO_SAMP_FREQ: |
|
switch (chan->type) { |
|
case IIO_INTENSITY: |
|
return ltr501_als_read_samp_freq(data, val, val2); |
|
case IIO_PROXIMITY: |
|
return ltr501_ps_read_samp_freq(data, val, val2); |
|
default: |
|
return -EINVAL; |
|
} |
|
} |
|
return -EINVAL; |
|
} |
|
|
|
static int ltr501_get_gain_index(const struct ltr501_gain *gain, int size, |
|
int val, int val2) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < size; i++) |
|
if (val == gain[i].scale && val2 == gain[i].uscale) |
|
return i; |
|
|
|
return -1; |
|
} |
|
|
|
static int ltr501_write_raw(struct iio_dev *indio_dev, |
|
struct iio_chan_spec const *chan, |
|
int val, int val2, long mask) |
|
{ |
|
struct ltr501_data *data = iio_priv(indio_dev); |
|
int i, ret, freq_val, freq_val2; |
|
struct ltr501_chip_info *info = data->chip_info; |
|
|
|
ret = iio_device_claim_direct_mode(indio_dev); |
|
if (ret) |
|
return ret; |
|
|
|
switch (mask) { |
|
case IIO_CHAN_INFO_SCALE: |
|
switch (chan->type) { |
|
case IIO_INTENSITY: |
|
i = ltr501_get_gain_index(info->als_gain, |
|
info->als_gain_tbl_size, |
|
val, val2); |
|
if (i < 0) { |
|
ret = -EINVAL; |
|
break; |
|
} |
|
|
|
data->als_contr &= ~info->als_gain_mask; |
|
data->als_contr |= i << info->als_gain_shift; |
|
|
|
ret = regmap_write(data->regmap, LTR501_ALS_CONTR, |
|
data->als_contr); |
|
break; |
|
case IIO_PROXIMITY: |
|
i = ltr501_get_gain_index(info->ps_gain, |
|
info->ps_gain_tbl_size, |
|
val, val2); |
|
if (i < 0) { |
|
ret = -EINVAL; |
|
break; |
|
} |
|
data->ps_contr &= ~LTR501_CONTR_PS_GAIN_MASK; |
|
data->ps_contr |= i << LTR501_CONTR_PS_GAIN_SHIFT; |
|
|
|
ret = regmap_write(data->regmap, LTR501_PS_CONTR, |
|
data->ps_contr); |
|
break; |
|
default: |
|
ret = -EINVAL; |
|
break; |
|
} |
|
break; |
|
|
|
case IIO_CHAN_INFO_INT_TIME: |
|
switch (chan->type) { |
|
case IIO_INTENSITY: |
|
if (val != 0) { |
|
ret = -EINVAL; |
|
break; |
|
} |
|
mutex_lock(&data->lock_als); |
|
ret = ltr501_set_it_time(data, val2); |
|
mutex_unlock(&data->lock_als); |
|
break; |
|
default: |
|
ret = -EINVAL; |
|
break; |
|
} |
|
break; |
|
|
|
case IIO_CHAN_INFO_SAMP_FREQ: |
|
switch (chan->type) { |
|
case IIO_INTENSITY: |
|
ret = ltr501_als_read_samp_freq(data, &freq_val, |
|
&freq_val2); |
|
if (ret < 0) |
|
break; |
|
|
|
ret = ltr501_als_write_samp_freq(data, val, val2); |
|
if (ret < 0) |
|
break; |
|
|
|
/* update persistence count when changing frequency */ |
|
ret = ltr501_write_intr_prst(data, chan->type, |
|
0, data->als_period); |
|
|
|
if (ret < 0) |
|
ret = ltr501_als_write_samp_freq(data, freq_val, |
|
freq_val2); |
|
break; |
|
case IIO_PROXIMITY: |
|
ret = ltr501_ps_read_samp_freq(data, &freq_val, |
|
&freq_val2); |
|
if (ret < 0) |
|
break; |
|
|
|
ret = ltr501_ps_write_samp_freq(data, val, val2); |
|
if (ret < 0) |
|
break; |
|
|
|
/* update persistence count when changing frequency */ |
|
ret = ltr501_write_intr_prst(data, chan->type, |
|
0, data->ps_period); |
|
|
|
if (ret < 0) |
|
ret = ltr501_ps_write_samp_freq(data, freq_val, |
|
freq_val2); |
|
break; |
|
default: |
|
ret = -EINVAL; |
|
break; |
|
} |
|
break; |
|
|
|
default: |
|
ret = -EINVAL; |
|
break; |
|
} |
|
|
|
iio_device_release_direct_mode(indio_dev); |
|
return ret; |
|
} |
|
|
|
static int ltr501_read_thresh(const struct iio_dev *indio_dev, |
|
const struct iio_chan_spec *chan, |
|
enum iio_event_type type, |
|
enum iio_event_direction dir, |
|
enum iio_event_info info, |
|
int *val, int *val2) |
|
{ |
|
const struct ltr501_data *data = iio_priv(indio_dev); |
|
int ret, thresh_data; |
|
|
|
switch (chan->type) { |
|
case IIO_INTENSITY: |
|
switch (dir) { |
|
case IIO_EV_DIR_RISING: |
|
ret = regmap_bulk_read(data->regmap, |
|
LTR501_ALS_THRESH_UP, |
|
&thresh_data, 2); |
|
if (ret < 0) |
|
return ret; |
|
*val = thresh_data & LTR501_ALS_THRESH_MASK; |
|
return IIO_VAL_INT; |
|
case IIO_EV_DIR_FALLING: |
|
ret = regmap_bulk_read(data->regmap, |
|
LTR501_ALS_THRESH_LOW, |
|
&thresh_data, 2); |
|
if (ret < 0) |
|
return ret; |
|
*val = thresh_data & LTR501_ALS_THRESH_MASK; |
|
return IIO_VAL_INT; |
|
default: |
|
return -EINVAL; |
|
} |
|
case IIO_PROXIMITY: |
|
switch (dir) { |
|
case IIO_EV_DIR_RISING: |
|
ret = regmap_bulk_read(data->regmap, |
|
LTR501_PS_THRESH_UP, |
|
&thresh_data, 2); |
|
if (ret < 0) |
|
return ret; |
|
*val = thresh_data & LTR501_PS_THRESH_MASK; |
|
return IIO_VAL_INT; |
|
case IIO_EV_DIR_FALLING: |
|
ret = regmap_bulk_read(data->regmap, |
|
LTR501_PS_THRESH_LOW, |
|
&thresh_data, 2); |
|
if (ret < 0) |
|
return ret; |
|
*val = thresh_data & LTR501_PS_THRESH_MASK; |
|
return IIO_VAL_INT; |
|
default: |
|
return -EINVAL; |
|
} |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return -EINVAL; |
|
} |
|
|
|
static int ltr501_write_thresh(struct iio_dev *indio_dev, |
|
const struct iio_chan_spec *chan, |
|
enum iio_event_type type, |
|
enum iio_event_direction dir, |
|
enum iio_event_info info, |
|
int val, int val2) |
|
{ |
|
struct ltr501_data *data = iio_priv(indio_dev); |
|
int ret; |
|
|
|
if (val < 0) |
|
return -EINVAL; |
|
|
|
switch (chan->type) { |
|
case IIO_INTENSITY: |
|
if (val > LTR501_ALS_THRESH_MASK) |
|
return -EINVAL; |
|
switch (dir) { |
|
case IIO_EV_DIR_RISING: |
|
mutex_lock(&data->lock_als); |
|
ret = regmap_bulk_write(data->regmap, |
|
LTR501_ALS_THRESH_UP, |
|
&val, 2); |
|
mutex_unlock(&data->lock_als); |
|
return ret; |
|
case IIO_EV_DIR_FALLING: |
|
mutex_lock(&data->lock_als); |
|
ret = regmap_bulk_write(data->regmap, |
|
LTR501_ALS_THRESH_LOW, |
|
&val, 2); |
|
mutex_unlock(&data->lock_als); |
|
return ret; |
|
default: |
|
return -EINVAL; |
|
} |
|
case IIO_PROXIMITY: |
|
if (val > LTR501_PS_THRESH_MASK) |
|
return -EINVAL; |
|
switch (dir) { |
|
case IIO_EV_DIR_RISING: |
|
mutex_lock(&data->lock_ps); |
|
ret = regmap_bulk_write(data->regmap, |
|
LTR501_PS_THRESH_UP, |
|
&val, 2); |
|
mutex_unlock(&data->lock_ps); |
|
return ret; |
|
case IIO_EV_DIR_FALLING: |
|
mutex_lock(&data->lock_ps); |
|
ret = regmap_bulk_write(data->regmap, |
|
LTR501_PS_THRESH_LOW, |
|
&val, 2); |
|
mutex_unlock(&data->lock_ps); |
|
return ret; |
|
default: |
|
return -EINVAL; |
|
} |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return -EINVAL; |
|
} |
|
|
|
static int ltr501_read_event(struct iio_dev *indio_dev, |
|
const struct iio_chan_spec *chan, |
|
enum iio_event_type type, |
|
enum iio_event_direction dir, |
|
enum iio_event_info info, |
|
int *val, int *val2) |
|
{ |
|
int ret; |
|
|
|
switch (info) { |
|
case IIO_EV_INFO_VALUE: |
|
return ltr501_read_thresh(indio_dev, chan, type, dir, |
|
info, val, val2); |
|
case IIO_EV_INFO_PERIOD: |
|
ret = ltr501_read_intr_prst(iio_priv(indio_dev), |
|
chan->type, val2); |
|
*val = *val2 / 1000000; |
|
*val2 = *val2 % 1000000; |
|
return ret; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return -EINVAL; |
|
} |
|
|
|
static int ltr501_write_event(struct iio_dev *indio_dev, |
|
const struct iio_chan_spec *chan, |
|
enum iio_event_type type, |
|
enum iio_event_direction dir, |
|
enum iio_event_info info, |
|
int val, int val2) |
|
{ |
|
switch (info) { |
|
case IIO_EV_INFO_VALUE: |
|
if (val2 != 0) |
|
return -EINVAL; |
|
return ltr501_write_thresh(indio_dev, chan, type, dir, |
|
info, val, val2); |
|
case IIO_EV_INFO_PERIOD: |
|
return ltr501_write_intr_prst(iio_priv(indio_dev), chan->type, |
|
val, val2); |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return -EINVAL; |
|
} |
|
|
|
static int ltr501_read_event_config(struct iio_dev *indio_dev, |
|
const struct iio_chan_spec *chan, |
|
enum iio_event_type type, |
|
enum iio_event_direction dir) |
|
{ |
|
struct ltr501_data *data = iio_priv(indio_dev); |
|
int ret, status; |
|
|
|
switch (chan->type) { |
|
case IIO_INTENSITY: |
|
ret = regmap_field_read(data->reg_als_intr, &status); |
|
if (ret < 0) |
|
return ret; |
|
return status; |
|
case IIO_PROXIMITY: |
|
ret = regmap_field_read(data->reg_ps_intr, &status); |
|
if (ret < 0) |
|
return ret; |
|
return status; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return -EINVAL; |
|
} |
|
|
|
static int ltr501_write_event_config(struct iio_dev *indio_dev, |
|
const struct iio_chan_spec *chan, |
|
enum iio_event_type type, |
|
enum iio_event_direction dir, int state) |
|
{ |
|
struct ltr501_data *data = iio_priv(indio_dev); |
|
int ret; |
|
|
|
/* only 1 and 0 are valid inputs */ |
|
if (state != 1 && state != 0) |
|
return -EINVAL; |
|
|
|
switch (chan->type) { |
|
case IIO_INTENSITY: |
|
mutex_lock(&data->lock_als); |
|
ret = regmap_field_write(data->reg_als_intr, state); |
|
mutex_unlock(&data->lock_als); |
|
return ret; |
|
case IIO_PROXIMITY: |
|
mutex_lock(&data->lock_ps); |
|
ret = regmap_field_write(data->reg_ps_intr, state); |
|
mutex_unlock(&data->lock_ps); |
|
return ret; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return -EINVAL; |
|
} |
|
|
|
static ssize_t ltr501_show_proximity_scale_avail(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct ltr501_data *data = iio_priv(dev_to_iio_dev(dev)); |
|
struct ltr501_chip_info *info = data->chip_info; |
|
ssize_t len = 0; |
|
int i; |
|
|
|
for (i = 0; i < info->ps_gain_tbl_size; i++) { |
|
if (info->ps_gain[i].scale == LTR501_RESERVED_GAIN) |
|
continue; |
|
len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06d ", |
|
info->ps_gain[i].scale, |
|
info->ps_gain[i].uscale); |
|
} |
|
|
|
buf[len - 1] = '\n'; |
|
|
|
return len; |
|
} |
|
|
|
static ssize_t ltr501_show_intensity_scale_avail(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct ltr501_data *data = iio_priv(dev_to_iio_dev(dev)); |
|
struct ltr501_chip_info *info = data->chip_info; |
|
ssize_t len = 0; |
|
int i; |
|
|
|
for (i = 0; i < info->als_gain_tbl_size; i++) { |
|
if (info->als_gain[i].scale == LTR501_RESERVED_GAIN) |
|
continue; |
|
len += scnprintf(buf + len, PAGE_SIZE - len, "%d.%06d ", |
|
info->als_gain[i].scale, |
|
info->als_gain[i].uscale); |
|
} |
|
|
|
buf[len - 1] = '\n'; |
|
|
|
return len; |
|
} |
|
|
|
static IIO_CONST_ATTR_INT_TIME_AVAIL("0.05 0.1 0.2 0.4"); |
|
static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("20 10 5 2 1 0.5"); |
|
|
|
static IIO_DEVICE_ATTR(in_proximity_scale_available, S_IRUGO, |
|
ltr501_show_proximity_scale_avail, NULL, 0); |
|
static IIO_DEVICE_ATTR(in_intensity_scale_available, S_IRUGO, |
|
ltr501_show_intensity_scale_avail, NULL, 0); |
|
|
|
static struct attribute *ltr501_attributes[] = { |
|
&iio_dev_attr_in_proximity_scale_available.dev_attr.attr, |
|
&iio_dev_attr_in_intensity_scale_available.dev_attr.attr, |
|
&iio_const_attr_integration_time_available.dev_attr.attr, |
|
&iio_const_attr_sampling_frequency_available.dev_attr.attr, |
|
NULL |
|
}; |
|
|
|
static struct attribute *ltr301_attributes[] = { |
|
&iio_dev_attr_in_intensity_scale_available.dev_attr.attr, |
|
&iio_const_attr_integration_time_available.dev_attr.attr, |
|
&iio_const_attr_sampling_frequency_available.dev_attr.attr, |
|
NULL |
|
}; |
|
|
|
static const struct attribute_group ltr501_attribute_group = { |
|
.attrs = ltr501_attributes, |
|
}; |
|
|
|
static const struct attribute_group ltr301_attribute_group = { |
|
.attrs = ltr301_attributes, |
|
}; |
|
|
|
static const struct iio_info ltr501_info_no_irq = { |
|
.read_raw = ltr501_read_raw, |
|
.write_raw = ltr501_write_raw, |
|
.attrs = <r501_attribute_group, |
|
}; |
|
|
|
static const struct iio_info ltr501_info = { |
|
.read_raw = ltr501_read_raw, |
|
.write_raw = ltr501_write_raw, |
|
.attrs = <r501_attribute_group, |
|
.read_event_value = <r501_read_event, |
|
.write_event_value = <r501_write_event, |
|
.read_event_config = <r501_read_event_config, |
|
.write_event_config = <r501_write_event_config, |
|
}; |
|
|
|
static const struct iio_info ltr301_info_no_irq = { |
|
.read_raw = ltr501_read_raw, |
|
.write_raw = ltr501_write_raw, |
|
.attrs = <r301_attribute_group, |
|
}; |
|
|
|
static const struct iio_info ltr301_info = { |
|
.read_raw = ltr501_read_raw, |
|
.write_raw = ltr501_write_raw, |
|
.attrs = <r301_attribute_group, |
|
.read_event_value = <r501_read_event, |
|
.write_event_value = <r501_write_event, |
|
.read_event_config = <r501_read_event_config, |
|
.write_event_config = <r501_write_event_config, |
|
}; |
|
|
|
static struct ltr501_chip_info ltr501_chip_info_tbl[] = { |
|
[ltr501] = { |
|
.partid = 0x08, |
|
.als_gain = ltr501_als_gain_tbl, |
|
.als_gain_tbl_size = ARRAY_SIZE(ltr501_als_gain_tbl), |
|
.ps_gain = ltr501_ps_gain_tbl, |
|
.ps_gain_tbl_size = ARRAY_SIZE(ltr501_ps_gain_tbl), |
|
.als_mode_active = BIT(0) | BIT(1), |
|
.als_gain_mask = BIT(3), |
|
.als_gain_shift = 3, |
|
.info = <r501_info, |
|
.info_no_irq = <r501_info_no_irq, |
|
.channels = ltr501_channels, |
|
.no_channels = ARRAY_SIZE(ltr501_channels), |
|
}, |
|
[ltr559] = { |
|
.partid = 0x09, |
|
.als_gain = ltr559_als_gain_tbl, |
|
.als_gain_tbl_size = ARRAY_SIZE(ltr559_als_gain_tbl), |
|
.ps_gain = ltr559_ps_gain_tbl, |
|
.ps_gain_tbl_size = ARRAY_SIZE(ltr559_ps_gain_tbl), |
|
.als_mode_active = BIT(1), |
|
.als_gain_mask = BIT(2) | BIT(3) | BIT(4), |
|
.als_gain_shift = 2, |
|
.info = <r501_info, |
|
.info_no_irq = <r501_info_no_irq, |
|
.channels = ltr501_channels, |
|
.no_channels = ARRAY_SIZE(ltr501_channels), |
|
}, |
|
[ltr301] = { |
|
.partid = 0x08, |
|
.als_gain = ltr501_als_gain_tbl, |
|
.als_gain_tbl_size = ARRAY_SIZE(ltr501_als_gain_tbl), |
|
.als_mode_active = BIT(0) | BIT(1), |
|
.als_gain_mask = BIT(3), |
|
.als_gain_shift = 3, |
|
.info = <r301_info, |
|
.info_no_irq = <r301_info_no_irq, |
|
.channels = ltr301_channels, |
|
.no_channels = ARRAY_SIZE(ltr301_channels), |
|
}, |
|
}; |
|
|
|
static int ltr501_write_contr(struct ltr501_data *data, u8 als_val, u8 ps_val) |
|
{ |
|
int ret; |
|
|
|
ret = regmap_write(data->regmap, LTR501_ALS_CONTR, als_val); |
|
if (ret < 0) |
|
return ret; |
|
|
|
return regmap_write(data->regmap, LTR501_PS_CONTR, ps_val); |
|
} |
|
|
|
static irqreturn_t ltr501_trigger_handler(int irq, void *p) |
|
{ |
|
struct iio_poll_func *pf = p; |
|
struct iio_dev *indio_dev = pf->indio_dev; |
|
struct ltr501_data *data = iio_priv(indio_dev); |
|
struct { |
|
u16 channels[3]; |
|
s64 ts __aligned(8); |
|
} scan; |
|
__le16 als_buf[2]; |
|
u8 mask = 0; |
|
int j = 0; |
|
int ret, psdata; |
|
|
|
memset(&scan, 0, sizeof(scan)); |
|
|
|
/* figure out which data needs to be ready */ |
|
if (test_bit(0, indio_dev->active_scan_mask) || |
|
test_bit(1, indio_dev->active_scan_mask)) |
|
mask |= LTR501_STATUS_ALS_RDY; |
|
if (test_bit(2, indio_dev->active_scan_mask)) |
|
mask |= LTR501_STATUS_PS_RDY; |
|
|
|
ret = ltr501_drdy(data, mask); |
|
if (ret < 0) |
|
goto done; |
|
|
|
if (mask & LTR501_STATUS_ALS_RDY) { |
|
ret = regmap_bulk_read(data->regmap, LTR501_ALS_DATA1, |
|
als_buf, sizeof(als_buf)); |
|
if (ret < 0) |
|
return ret; |
|
if (test_bit(0, indio_dev->active_scan_mask)) |
|
scan.channels[j++] = le16_to_cpu(als_buf[1]); |
|
if (test_bit(1, indio_dev->active_scan_mask)) |
|
scan.channels[j++] = le16_to_cpu(als_buf[0]); |
|
} |
|
|
|
if (mask & LTR501_STATUS_PS_RDY) { |
|
ret = regmap_bulk_read(data->regmap, LTR501_PS_DATA, |
|
&psdata, 2); |
|
if (ret < 0) |
|
goto done; |
|
scan.channels[j++] = psdata & LTR501_PS_DATA_MASK; |
|
} |
|
|
|
iio_push_to_buffers_with_timestamp(indio_dev, &scan, |
|
iio_get_time_ns(indio_dev)); |
|
|
|
done: |
|
iio_trigger_notify_done(indio_dev->trig); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static irqreturn_t ltr501_interrupt_handler(int irq, void *private) |
|
{ |
|
struct iio_dev *indio_dev = private; |
|
struct ltr501_data *data = iio_priv(indio_dev); |
|
int ret, status; |
|
|
|
ret = regmap_read(data->regmap, LTR501_ALS_PS_STATUS, &status); |
|
if (ret < 0) { |
|
dev_err(&data->client->dev, |
|
"irq read int reg failed\n"); |
|
return IRQ_HANDLED; |
|
} |
|
|
|
if (status & LTR501_STATUS_ALS_INTR) |
|
iio_push_event(indio_dev, |
|
IIO_UNMOD_EVENT_CODE(IIO_INTENSITY, 0, |
|
IIO_EV_TYPE_THRESH, |
|
IIO_EV_DIR_EITHER), |
|
iio_get_time_ns(indio_dev)); |
|
|
|
if (status & LTR501_STATUS_PS_INTR) |
|
iio_push_event(indio_dev, |
|
IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 0, |
|
IIO_EV_TYPE_THRESH, |
|
IIO_EV_DIR_EITHER), |
|
iio_get_time_ns(indio_dev)); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static int ltr501_init(struct ltr501_data *data) |
|
{ |
|
int ret, status; |
|
|
|
ret = regmap_read(data->regmap, LTR501_ALS_CONTR, &status); |
|
if (ret < 0) |
|
return ret; |
|
|
|
data->als_contr = status | data->chip_info->als_mode_active; |
|
|
|
ret = regmap_read(data->regmap, LTR501_PS_CONTR, &status); |
|
if (ret < 0) |
|
return ret; |
|
|
|
data->ps_contr = status | LTR501_CONTR_ACTIVE; |
|
|
|
ret = ltr501_read_intr_prst(data, IIO_INTENSITY, &data->als_period); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ret = ltr501_read_intr_prst(data, IIO_PROXIMITY, &data->ps_period); |
|
if (ret < 0) |
|
return ret; |
|
|
|
return ltr501_write_contr(data, data->als_contr, data->ps_contr); |
|
} |
|
|
|
static bool ltr501_is_volatile_reg(struct device *dev, unsigned int reg) |
|
{ |
|
switch (reg) { |
|
case LTR501_ALS_DATA1: |
|
case LTR501_ALS_DATA0: |
|
case LTR501_ALS_PS_STATUS: |
|
case LTR501_PS_DATA: |
|
return true; |
|
default: |
|
return false; |
|
} |
|
} |
|
|
|
static const struct regmap_config ltr501_regmap_config = { |
|
.name = LTR501_REGMAP_NAME, |
|
.reg_bits = 8, |
|
.val_bits = 8, |
|
.max_register = LTR501_MAX_REG, |
|
.cache_type = REGCACHE_RBTREE, |
|
.volatile_reg = ltr501_is_volatile_reg, |
|
}; |
|
|
|
static int ltr501_powerdown(struct ltr501_data *data) |
|
{ |
|
return ltr501_write_contr(data, data->als_contr & |
|
~data->chip_info->als_mode_active, |
|
data->ps_contr & ~LTR501_CONTR_ACTIVE); |
|
} |
|
|
|
static const char *ltr501_match_acpi_device(struct device *dev, int *chip_idx) |
|
{ |
|
const struct acpi_device_id *id; |
|
|
|
id = acpi_match_device(dev->driver->acpi_match_table, dev); |
|
if (!id) |
|
return NULL; |
|
*chip_idx = id->driver_data; |
|
return dev_name(dev); |
|
} |
|
|
|
static int ltr501_probe(struct i2c_client *client, |
|
const struct i2c_device_id *id) |
|
{ |
|
struct ltr501_data *data; |
|
struct iio_dev *indio_dev; |
|
struct regmap *regmap; |
|
int ret, partid, chip_idx = 0; |
|
const char *name = NULL; |
|
|
|
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); |
|
if (!indio_dev) |
|
return -ENOMEM; |
|
|
|
regmap = devm_regmap_init_i2c(client, <r501_regmap_config); |
|
if (IS_ERR(regmap)) { |
|
dev_err(&client->dev, "Regmap initialization failed.\n"); |
|
return PTR_ERR(regmap); |
|
} |
|
|
|
data = iio_priv(indio_dev); |
|
i2c_set_clientdata(client, indio_dev); |
|
data->client = client; |
|
data->regmap = regmap; |
|
mutex_init(&data->lock_als); |
|
mutex_init(&data->lock_ps); |
|
|
|
data->reg_it = devm_regmap_field_alloc(&client->dev, regmap, |
|
reg_field_it); |
|
if (IS_ERR(data->reg_it)) { |
|
dev_err(&client->dev, "Integ time reg field init failed.\n"); |
|
return PTR_ERR(data->reg_it); |
|
} |
|
|
|
data->reg_als_intr = devm_regmap_field_alloc(&client->dev, regmap, |
|
reg_field_als_intr); |
|
if (IS_ERR(data->reg_als_intr)) { |
|
dev_err(&client->dev, "ALS intr mode reg field init failed\n"); |
|
return PTR_ERR(data->reg_als_intr); |
|
} |
|
|
|
data->reg_ps_intr = devm_regmap_field_alloc(&client->dev, regmap, |
|
reg_field_ps_intr); |
|
if (IS_ERR(data->reg_ps_intr)) { |
|
dev_err(&client->dev, "PS intr mode reg field init failed.\n"); |
|
return PTR_ERR(data->reg_ps_intr); |
|
} |
|
|
|
data->reg_als_rate = devm_regmap_field_alloc(&client->dev, regmap, |
|
reg_field_als_rate); |
|
if (IS_ERR(data->reg_als_rate)) { |
|
dev_err(&client->dev, "ALS samp rate field init failed.\n"); |
|
return PTR_ERR(data->reg_als_rate); |
|
} |
|
|
|
data->reg_ps_rate = devm_regmap_field_alloc(&client->dev, regmap, |
|
reg_field_ps_rate); |
|
if (IS_ERR(data->reg_ps_rate)) { |
|
dev_err(&client->dev, "PS samp rate field init failed.\n"); |
|
return PTR_ERR(data->reg_ps_rate); |
|
} |
|
|
|
data->reg_als_prst = devm_regmap_field_alloc(&client->dev, regmap, |
|
reg_field_als_prst); |
|
if (IS_ERR(data->reg_als_prst)) { |
|
dev_err(&client->dev, "ALS prst reg field init failed\n"); |
|
return PTR_ERR(data->reg_als_prst); |
|
} |
|
|
|
data->reg_ps_prst = devm_regmap_field_alloc(&client->dev, regmap, |
|
reg_field_ps_prst); |
|
if (IS_ERR(data->reg_ps_prst)) { |
|
dev_err(&client->dev, "PS prst reg field init failed.\n"); |
|
return PTR_ERR(data->reg_ps_prst); |
|
} |
|
|
|
ret = regmap_read(data->regmap, LTR501_PART_ID, &partid); |
|
if (ret < 0) |
|
return ret; |
|
|
|
if (id) { |
|
name = id->name; |
|
chip_idx = id->driver_data; |
|
} else if (ACPI_HANDLE(&client->dev)) { |
|
name = ltr501_match_acpi_device(&client->dev, &chip_idx); |
|
} else { |
|
return -ENODEV; |
|
} |
|
|
|
data->chip_info = <r501_chip_info_tbl[chip_idx]; |
|
|
|
if ((partid >> 4) != data->chip_info->partid) |
|
return -ENODEV; |
|
|
|
indio_dev->info = data->chip_info->info; |
|
indio_dev->channels = data->chip_info->channels; |
|
indio_dev->num_channels = data->chip_info->no_channels; |
|
indio_dev->name = name; |
|
indio_dev->modes = INDIO_DIRECT_MODE; |
|
|
|
ret = ltr501_init(data); |
|
if (ret < 0) |
|
return ret; |
|
|
|
if (client->irq > 0) { |
|
ret = devm_request_threaded_irq(&client->dev, client->irq, |
|
NULL, ltr501_interrupt_handler, |
|
IRQF_TRIGGER_FALLING | |
|
IRQF_ONESHOT, |
|
"ltr501_thresh_event", |
|
indio_dev); |
|
if (ret) { |
|
dev_err(&client->dev, "request irq (%d) failed\n", |
|
client->irq); |
|
return ret; |
|
} |
|
} else { |
|
indio_dev->info = data->chip_info->info_no_irq; |
|
} |
|
|
|
ret = iio_triggered_buffer_setup(indio_dev, NULL, |
|
ltr501_trigger_handler, NULL); |
|
if (ret) |
|
goto powerdown_on_error; |
|
|
|
ret = iio_device_register(indio_dev); |
|
if (ret) |
|
goto error_unreg_buffer; |
|
|
|
return 0; |
|
|
|
error_unreg_buffer: |
|
iio_triggered_buffer_cleanup(indio_dev); |
|
powerdown_on_error: |
|
ltr501_powerdown(data); |
|
return ret; |
|
} |
|
|
|
static int ltr501_remove(struct i2c_client *client) |
|
{ |
|
struct iio_dev *indio_dev = i2c_get_clientdata(client); |
|
|
|
iio_device_unregister(indio_dev); |
|
iio_triggered_buffer_cleanup(indio_dev); |
|
ltr501_powerdown(iio_priv(indio_dev)); |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_PM_SLEEP |
|
static int ltr501_suspend(struct device *dev) |
|
{ |
|
struct ltr501_data *data = iio_priv(i2c_get_clientdata( |
|
to_i2c_client(dev))); |
|
return ltr501_powerdown(data); |
|
} |
|
|
|
static int ltr501_resume(struct device *dev) |
|
{ |
|
struct ltr501_data *data = iio_priv(i2c_get_clientdata( |
|
to_i2c_client(dev))); |
|
|
|
return ltr501_write_contr(data, data->als_contr, |
|
data->ps_contr); |
|
} |
|
#endif |
|
|
|
static SIMPLE_DEV_PM_OPS(ltr501_pm_ops, ltr501_suspend, ltr501_resume); |
|
|
|
static const struct acpi_device_id ltr_acpi_match[] = { |
|
{"LTER0501", ltr501}, |
|
{"LTER0559", ltr559}, |
|
{"LTER0301", ltr301}, |
|
{ }, |
|
}; |
|
MODULE_DEVICE_TABLE(acpi, ltr_acpi_match); |
|
|
|
static const struct i2c_device_id ltr501_id[] = { |
|
{ "ltr501", ltr501}, |
|
{ "ltr559", ltr559}, |
|
{ "ltr301", ltr301}, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, ltr501_id); |
|
|
|
static struct i2c_driver ltr501_driver = { |
|
.driver = { |
|
.name = LTR501_DRV_NAME, |
|
.pm = <r501_pm_ops, |
|
.acpi_match_table = ACPI_PTR(ltr_acpi_match), |
|
}, |
|
.probe = ltr501_probe, |
|
.remove = ltr501_remove, |
|
.id_table = ltr501_id, |
|
}; |
|
|
|
module_i2c_driver(ltr501_driver); |
|
|
|
MODULE_AUTHOR("Peter Meerwald <[email protected]>"); |
|
MODULE_DESCRIPTION("Lite-On LTR501 ambient light and proximity sensor driver"); |
|
MODULE_LICENSE("GPL");
|
|
|