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.
636 lines
16 KiB
636 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* max30102.c - Support for MAX30102 heart rate and pulse oximeter sensor |
|
* |
|
* Copyright (C) 2017 Matt Ranostay <[email protected]> |
|
* |
|
* Support for MAX30105 optical particle sensor |
|
* Copyright (C) 2017 Peter Meerwald-Stadler <[email protected]> |
|
* |
|
* 7-bit I2C chip address: 0x57 |
|
* TODO: proximity power saving feature |
|
*/ |
|
|
|
#include <linux/module.h> |
|
#include <linux/init.h> |
|
#include <linux/interrupt.h> |
|
#include <linux/delay.h> |
|
#include <linux/err.h> |
|
#include <linux/irq.h> |
|
#include <linux/i2c.h> |
|
#include <linux/mutex.h> |
|
#include <linux/mod_devicetable.h> |
|
#include <linux/regmap.h> |
|
#include <linux/iio/iio.h> |
|
#include <linux/iio/buffer.h> |
|
#include <linux/iio/kfifo_buf.h> |
|
|
|
#define MAX30102_REGMAP_NAME "max30102_regmap" |
|
#define MAX30102_DRV_NAME "max30102" |
|
#define MAX30102_PART_NUMBER 0x15 |
|
|
|
enum max30102_chip_id { |
|
max30102, |
|
max30105, |
|
}; |
|
|
|
enum max3012_led_idx { |
|
MAX30102_LED_RED, |
|
MAX30102_LED_IR, |
|
MAX30105_LED_GREEN, |
|
}; |
|
|
|
#define MAX30102_REG_INT_STATUS 0x00 |
|
#define MAX30102_REG_INT_STATUS_PWR_RDY BIT(0) |
|
#define MAX30102_REG_INT_STATUS_PROX_INT BIT(4) |
|
#define MAX30102_REG_INT_STATUS_ALC_OVF BIT(5) |
|
#define MAX30102_REG_INT_STATUS_PPG_RDY BIT(6) |
|
#define MAX30102_REG_INT_STATUS_FIFO_RDY BIT(7) |
|
|
|
#define MAX30102_REG_INT_ENABLE 0x02 |
|
#define MAX30102_REG_INT_ENABLE_PROX_INT_EN BIT(4) |
|
#define MAX30102_REG_INT_ENABLE_ALC_OVF_EN BIT(5) |
|
#define MAX30102_REG_INT_ENABLE_PPG_EN BIT(6) |
|
#define MAX30102_REG_INT_ENABLE_FIFO_EN BIT(7) |
|
#define MAX30102_REG_INT_ENABLE_MASK 0xf0 |
|
#define MAX30102_REG_INT_ENABLE_MASK_SHIFT 4 |
|
|
|
#define MAX30102_REG_FIFO_WR_PTR 0x04 |
|
#define MAX30102_REG_FIFO_OVR_CTR 0x05 |
|
#define MAX30102_REG_FIFO_RD_PTR 0x06 |
|
#define MAX30102_REG_FIFO_DATA 0x07 |
|
#define MAX30102_REG_FIFO_DATA_BYTES 3 |
|
|
|
#define MAX30102_REG_FIFO_CONFIG 0x08 |
|
#define MAX30102_REG_FIFO_CONFIG_AVG_4SAMPLES BIT(1) |
|
#define MAX30102_REG_FIFO_CONFIG_AVG_SHIFT 5 |
|
#define MAX30102_REG_FIFO_CONFIG_AFULL BIT(0) |
|
|
|
#define MAX30102_REG_MODE_CONFIG 0x09 |
|
#define MAX30102_REG_MODE_CONFIG_MODE_NONE 0x00 |
|
#define MAX30102_REG_MODE_CONFIG_MODE_HR 0x02 /* red LED */ |
|
#define MAX30102_REG_MODE_CONFIG_MODE_HR_SPO2 0x03 /* red + IR LED */ |
|
#define MAX30102_REG_MODE_CONFIG_MODE_MULTI 0x07 /* multi-LED mode */ |
|
#define MAX30102_REG_MODE_CONFIG_MODE_MASK GENMASK(2, 0) |
|
#define MAX30102_REG_MODE_CONFIG_PWR BIT(7) |
|
|
|
#define MAX30102_REG_MODE_CONTROL_SLOT21 0x11 /* multi-LED control */ |
|
#define MAX30102_REG_MODE_CONTROL_SLOT43 0x12 |
|
#define MAX30102_REG_MODE_CONTROL_SLOT_MASK (GENMASK(6, 4) | GENMASK(2, 0)) |
|
#define MAX30102_REG_MODE_CONTROL_SLOT_SHIFT 4 |
|
|
|
#define MAX30102_REG_SPO2_CONFIG 0x0a |
|
#define MAX30102_REG_SPO2_CONFIG_PULSE_411_US 0x03 |
|
#define MAX30102_REG_SPO2_CONFIG_SR_400HZ 0x03 |
|
#define MAX30102_REG_SPO2_CONFIG_SR_MASK 0x07 |
|
#define MAX30102_REG_SPO2_CONFIG_SR_MASK_SHIFT 2 |
|
#define MAX30102_REG_SPO2_CONFIG_ADC_4096_STEPS BIT(0) |
|
#define MAX30102_REG_SPO2_CONFIG_ADC_MASK_SHIFT 5 |
|
|
|
#define MAX30102_REG_RED_LED_CONFIG 0x0c |
|
#define MAX30102_REG_IR_LED_CONFIG 0x0d |
|
#define MAX30105_REG_GREEN_LED_CONFIG 0x0e |
|
|
|
#define MAX30102_REG_TEMP_CONFIG 0x21 |
|
#define MAX30102_REG_TEMP_CONFIG_TEMP_EN BIT(0) |
|
|
|
#define MAX30102_REG_TEMP_INTEGER 0x1f |
|
#define MAX30102_REG_TEMP_FRACTION 0x20 |
|
|
|
#define MAX30102_REG_REV_ID 0xfe |
|
#define MAX30102_REG_PART_ID 0xff |
|
|
|
struct max30102_data { |
|
struct i2c_client *client; |
|
struct iio_dev *indio_dev; |
|
struct mutex lock; |
|
struct regmap *regmap; |
|
enum max30102_chip_id chip_id; |
|
|
|
u8 buffer[12]; |
|
__be32 processed_buffer[3]; /* 3 x 18-bit (padded to 32-bits) */ |
|
}; |
|
|
|
static const struct regmap_config max30102_regmap_config = { |
|
.name = MAX30102_REGMAP_NAME, |
|
|
|
.reg_bits = 8, |
|
.val_bits = 8, |
|
}; |
|
|
|
static const unsigned long max30102_scan_masks[] = { |
|
BIT(MAX30102_LED_RED) | BIT(MAX30102_LED_IR), |
|
0 |
|
}; |
|
|
|
static const unsigned long max30105_scan_masks[] = { |
|
BIT(MAX30102_LED_RED) | BIT(MAX30102_LED_IR), |
|
BIT(MAX30102_LED_RED) | BIT(MAX30102_LED_IR) | |
|
BIT(MAX30105_LED_GREEN), |
|
0 |
|
}; |
|
|
|
#define MAX30102_INTENSITY_CHANNEL(_si, _mod) { \ |
|
.type = IIO_INTENSITY, \ |
|
.channel2 = _mod, \ |
|
.modified = 1, \ |
|
.scan_index = _si, \ |
|
.scan_type = { \ |
|
.sign = 'u', \ |
|
.shift = 8, \ |
|
.realbits = 18, \ |
|
.storagebits = 32, \ |
|
.endianness = IIO_BE, \ |
|
}, \ |
|
} |
|
|
|
static const struct iio_chan_spec max30102_channels[] = { |
|
MAX30102_INTENSITY_CHANNEL(MAX30102_LED_RED, IIO_MOD_LIGHT_RED), |
|
MAX30102_INTENSITY_CHANNEL(MAX30102_LED_IR, IIO_MOD_LIGHT_IR), |
|
{ |
|
.type = IIO_TEMP, |
|
.info_mask_separate = |
|
BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), |
|
.scan_index = -1, |
|
}, |
|
}; |
|
|
|
static const struct iio_chan_spec max30105_channels[] = { |
|
MAX30102_INTENSITY_CHANNEL(MAX30102_LED_RED, IIO_MOD_LIGHT_RED), |
|
MAX30102_INTENSITY_CHANNEL(MAX30102_LED_IR, IIO_MOD_LIGHT_IR), |
|
MAX30102_INTENSITY_CHANNEL(MAX30105_LED_GREEN, IIO_MOD_LIGHT_GREEN), |
|
{ |
|
.type = IIO_TEMP, |
|
.info_mask_separate = |
|
BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), |
|
.scan_index = -1, |
|
}, |
|
}; |
|
|
|
static int max30102_set_power(struct max30102_data *data, bool en) |
|
{ |
|
return regmap_update_bits(data->regmap, MAX30102_REG_MODE_CONFIG, |
|
MAX30102_REG_MODE_CONFIG_PWR, |
|
en ? 0 : MAX30102_REG_MODE_CONFIG_PWR); |
|
} |
|
|
|
static int max30102_set_powermode(struct max30102_data *data, u8 mode, bool en) |
|
{ |
|
u8 reg = mode; |
|
|
|
if (!en) |
|
reg |= MAX30102_REG_MODE_CONFIG_PWR; |
|
|
|
return regmap_update_bits(data->regmap, MAX30102_REG_MODE_CONFIG, |
|
MAX30102_REG_MODE_CONFIG_PWR | |
|
MAX30102_REG_MODE_CONFIG_MODE_MASK, reg); |
|
} |
|
|
|
#define MAX30102_MODE_CONTROL_LED_SLOTS(slot2, slot1) \ |
|
((slot2 << MAX30102_REG_MODE_CONTROL_SLOT_SHIFT) | slot1) |
|
|
|
static int max30102_buffer_postenable(struct iio_dev *indio_dev) |
|
{ |
|
struct max30102_data *data = iio_priv(indio_dev); |
|
int ret; |
|
u8 reg; |
|
|
|
switch (*indio_dev->active_scan_mask) { |
|
case BIT(MAX30102_LED_RED) | BIT(MAX30102_LED_IR): |
|
reg = MAX30102_REG_MODE_CONFIG_MODE_HR_SPO2; |
|
break; |
|
case BIT(MAX30102_LED_RED) | BIT(MAX30102_LED_IR) | |
|
BIT(MAX30105_LED_GREEN): |
|
ret = regmap_update_bits(data->regmap, |
|
MAX30102_REG_MODE_CONTROL_SLOT21, |
|
MAX30102_REG_MODE_CONTROL_SLOT_MASK, |
|
MAX30102_MODE_CONTROL_LED_SLOTS(2, 1)); |
|
if (ret) |
|
return ret; |
|
|
|
ret = regmap_update_bits(data->regmap, |
|
MAX30102_REG_MODE_CONTROL_SLOT43, |
|
MAX30102_REG_MODE_CONTROL_SLOT_MASK, |
|
MAX30102_MODE_CONTROL_LED_SLOTS(0, 3)); |
|
if (ret) |
|
return ret; |
|
|
|
reg = MAX30102_REG_MODE_CONFIG_MODE_MULTI; |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return max30102_set_powermode(data, reg, true); |
|
} |
|
|
|
static int max30102_buffer_predisable(struct iio_dev *indio_dev) |
|
{ |
|
struct max30102_data *data = iio_priv(indio_dev); |
|
|
|
return max30102_set_powermode(data, MAX30102_REG_MODE_CONFIG_MODE_NONE, |
|
false); |
|
} |
|
|
|
static const struct iio_buffer_setup_ops max30102_buffer_setup_ops = { |
|
.postenable = max30102_buffer_postenable, |
|
.predisable = max30102_buffer_predisable, |
|
}; |
|
|
|
static inline int max30102_fifo_count(struct max30102_data *data) |
|
{ |
|
unsigned int val; |
|
int ret; |
|
|
|
ret = regmap_read(data->regmap, MAX30102_REG_INT_STATUS, &val); |
|
if (ret) |
|
return ret; |
|
|
|
/* FIFO has one sample slot left */ |
|
if (val & MAX30102_REG_INT_STATUS_FIFO_RDY) |
|
return 1; |
|
|
|
return 0; |
|
} |
|
|
|
#define MAX30102_COPY_DATA(i) \ |
|
memcpy(&data->processed_buffer[(i)], \ |
|
&buffer[(i) * MAX30102_REG_FIFO_DATA_BYTES], \ |
|
MAX30102_REG_FIFO_DATA_BYTES) |
|
|
|
static int max30102_read_measurement(struct max30102_data *data, |
|
unsigned int measurements) |
|
{ |
|
int ret; |
|
u8 *buffer = (u8 *) &data->buffer; |
|
|
|
ret = i2c_smbus_read_i2c_block_data(data->client, |
|
MAX30102_REG_FIFO_DATA, |
|
measurements * |
|
MAX30102_REG_FIFO_DATA_BYTES, |
|
buffer); |
|
|
|
switch (measurements) { |
|
case 3: |
|
MAX30102_COPY_DATA(2); |
|
fallthrough; |
|
case 2: |
|
MAX30102_COPY_DATA(1); |
|
fallthrough; |
|
case 1: |
|
MAX30102_COPY_DATA(0); |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return (ret == measurements * MAX30102_REG_FIFO_DATA_BYTES) ? |
|
0 : -EINVAL; |
|
} |
|
|
|
static irqreturn_t max30102_interrupt_handler(int irq, void *private) |
|
{ |
|
struct iio_dev *indio_dev = private; |
|
struct max30102_data *data = iio_priv(indio_dev); |
|
unsigned int measurements = bitmap_weight(indio_dev->active_scan_mask, |
|
indio_dev->masklength); |
|
int ret, cnt = 0; |
|
|
|
mutex_lock(&data->lock); |
|
|
|
while (cnt || (cnt = max30102_fifo_count(data)) > 0) { |
|
ret = max30102_read_measurement(data, measurements); |
|
if (ret) |
|
break; |
|
|
|
iio_push_to_buffers(data->indio_dev, data->processed_buffer); |
|
cnt--; |
|
} |
|
|
|
mutex_unlock(&data->lock); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static int max30102_get_current_idx(unsigned int val, int *reg) |
|
{ |
|
/* each step is 0.200 mA */ |
|
*reg = val / 200; |
|
|
|
return *reg > 0xff ? -EINVAL : 0; |
|
} |
|
|
|
static int max30102_led_init(struct max30102_data *data) |
|
{ |
|
struct device *dev = &data->client->dev; |
|
unsigned int val; |
|
int reg, ret; |
|
|
|
ret = device_property_read_u32(dev, "maxim,red-led-current-microamp", &val); |
|
if (ret) { |
|
dev_info(dev, "no red-led-current-microamp set\n"); |
|
|
|
/* Default to 7 mA RED LED */ |
|
val = 7000; |
|
} |
|
|
|
ret = max30102_get_current_idx(val, ®); |
|
if (ret) { |
|
dev_err(dev, "invalid RED LED current setting %d\n", val); |
|
return ret; |
|
} |
|
|
|
ret = regmap_write(data->regmap, MAX30102_REG_RED_LED_CONFIG, reg); |
|
if (ret) |
|
return ret; |
|
|
|
if (data->chip_id == max30105) { |
|
ret = device_property_read_u32(dev, |
|
"maxim,green-led-current-microamp", &val); |
|
if (ret) { |
|
dev_info(dev, "no green-led-current-microamp set\n"); |
|
|
|
/* Default to 7 mA green LED */ |
|
val = 7000; |
|
} |
|
|
|
ret = max30102_get_current_idx(val, ®); |
|
if (ret) { |
|
dev_err(dev, "invalid green LED current setting %d\n", |
|
val); |
|
return ret; |
|
} |
|
|
|
ret = regmap_write(data->regmap, MAX30105_REG_GREEN_LED_CONFIG, |
|
reg); |
|
if (ret) |
|
return ret; |
|
} |
|
|
|
ret = device_property_read_u32(dev, "maxim,ir-led-current-microamp", &val); |
|
if (ret) { |
|
dev_info(dev, "no ir-led-current-microamp set\n"); |
|
|
|
/* Default to 7 mA IR LED */ |
|
val = 7000; |
|
} |
|
|
|
ret = max30102_get_current_idx(val, ®); |
|
if (ret) { |
|
dev_err(dev, "invalid IR LED current setting %d\n", val); |
|
return ret; |
|
} |
|
|
|
return regmap_write(data->regmap, MAX30102_REG_IR_LED_CONFIG, reg); |
|
} |
|
|
|
static int max30102_chip_init(struct max30102_data *data) |
|
{ |
|
int ret; |
|
|
|
/* setup LED current settings */ |
|
ret = max30102_led_init(data); |
|
if (ret) |
|
return ret; |
|
|
|
/* configure 18-bit HR + SpO2 readings at 400Hz */ |
|
ret = regmap_write(data->regmap, MAX30102_REG_SPO2_CONFIG, |
|
(MAX30102_REG_SPO2_CONFIG_ADC_4096_STEPS |
|
<< MAX30102_REG_SPO2_CONFIG_ADC_MASK_SHIFT) | |
|
(MAX30102_REG_SPO2_CONFIG_SR_400HZ |
|
<< MAX30102_REG_SPO2_CONFIG_SR_MASK_SHIFT) | |
|
MAX30102_REG_SPO2_CONFIG_PULSE_411_US); |
|
if (ret) |
|
return ret; |
|
|
|
/* average 4 samples + generate FIFO interrupt */ |
|
ret = regmap_write(data->regmap, MAX30102_REG_FIFO_CONFIG, |
|
(MAX30102_REG_FIFO_CONFIG_AVG_4SAMPLES |
|
<< MAX30102_REG_FIFO_CONFIG_AVG_SHIFT) | |
|
MAX30102_REG_FIFO_CONFIG_AFULL); |
|
if (ret) |
|
return ret; |
|
|
|
/* enable FIFO interrupt */ |
|
return regmap_update_bits(data->regmap, MAX30102_REG_INT_ENABLE, |
|
MAX30102_REG_INT_ENABLE_MASK, |
|
MAX30102_REG_INT_ENABLE_FIFO_EN); |
|
} |
|
|
|
static int max30102_read_temp(struct max30102_data *data, int *val) |
|
{ |
|
int ret; |
|
unsigned int reg; |
|
|
|
ret = regmap_read(data->regmap, MAX30102_REG_TEMP_INTEGER, ®); |
|
if (ret < 0) |
|
return ret; |
|
*val = reg << 4; |
|
|
|
ret = regmap_read(data->regmap, MAX30102_REG_TEMP_FRACTION, ®); |
|
if (ret < 0) |
|
return ret; |
|
|
|
*val |= reg & 0xf; |
|
*val = sign_extend32(*val, 11); |
|
|
|
return 0; |
|
} |
|
|
|
static int max30102_get_temp(struct max30102_data *data, int *val, bool en) |
|
{ |
|
int ret; |
|
|
|
if (en) { |
|
ret = max30102_set_power(data, true); |
|
if (ret) |
|
return ret; |
|
} |
|
|
|
/* start acquisition */ |
|
ret = regmap_update_bits(data->regmap, MAX30102_REG_TEMP_CONFIG, |
|
MAX30102_REG_TEMP_CONFIG_TEMP_EN, |
|
MAX30102_REG_TEMP_CONFIG_TEMP_EN); |
|
if (ret) |
|
goto out; |
|
|
|
msleep(35); |
|
ret = max30102_read_temp(data, val); |
|
|
|
out: |
|
if (en) |
|
max30102_set_power(data, false); |
|
|
|
return ret; |
|
} |
|
|
|
static int max30102_read_raw(struct iio_dev *indio_dev, |
|
struct iio_chan_spec const *chan, |
|
int *val, int *val2, long mask) |
|
{ |
|
struct max30102_data *data = iio_priv(indio_dev); |
|
int ret = -EINVAL; |
|
|
|
switch (mask) { |
|
case IIO_CHAN_INFO_RAW: |
|
/* |
|
* Temperature reading can only be acquired when not in |
|
* shutdown; leave shutdown briefly when buffer not running |
|
*/ |
|
mutex_lock(&indio_dev->mlock); |
|
if (!iio_buffer_enabled(indio_dev)) |
|
ret = max30102_get_temp(data, val, true); |
|
else |
|
ret = max30102_get_temp(data, val, false); |
|
mutex_unlock(&indio_dev->mlock); |
|
if (ret) |
|
return ret; |
|
|
|
ret = IIO_VAL_INT; |
|
break; |
|
case IIO_CHAN_INFO_SCALE: |
|
*val = 1000; /* 62.5 */ |
|
*val2 = 16; |
|
ret = IIO_VAL_FRACTIONAL; |
|
break; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static const struct iio_info max30102_info = { |
|
.read_raw = max30102_read_raw, |
|
}; |
|
|
|
static int max30102_probe(struct i2c_client *client, |
|
const struct i2c_device_id *id) |
|
{ |
|
struct max30102_data *data; |
|
struct iio_buffer *buffer; |
|
struct iio_dev *indio_dev; |
|
int ret; |
|
unsigned int reg; |
|
|
|
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); |
|
if (!indio_dev) |
|
return -ENOMEM; |
|
|
|
buffer = devm_iio_kfifo_allocate(&client->dev); |
|
if (!buffer) |
|
return -ENOMEM; |
|
|
|
iio_device_attach_buffer(indio_dev, buffer); |
|
|
|
indio_dev->name = MAX30102_DRV_NAME; |
|
indio_dev->info = &max30102_info; |
|
indio_dev->modes = (INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE); |
|
indio_dev->setup_ops = &max30102_buffer_setup_ops; |
|
|
|
data = iio_priv(indio_dev); |
|
data->indio_dev = indio_dev; |
|
data->client = client; |
|
data->chip_id = id->driver_data; |
|
|
|
mutex_init(&data->lock); |
|
i2c_set_clientdata(client, indio_dev); |
|
|
|
switch (data->chip_id) { |
|
case max30105: |
|
indio_dev->channels = max30105_channels; |
|
indio_dev->num_channels = ARRAY_SIZE(max30105_channels); |
|
indio_dev->available_scan_masks = max30105_scan_masks; |
|
break; |
|
case max30102: |
|
indio_dev->channels = max30102_channels; |
|
indio_dev->num_channels = ARRAY_SIZE(max30102_channels); |
|
indio_dev->available_scan_masks = max30102_scan_masks; |
|
break; |
|
default: |
|
return -ENODEV; |
|
} |
|
|
|
data->regmap = devm_regmap_init_i2c(client, &max30102_regmap_config); |
|
if (IS_ERR(data->regmap)) { |
|
dev_err(&client->dev, "regmap initialization failed\n"); |
|
return PTR_ERR(data->regmap); |
|
} |
|
|
|
/* check part ID */ |
|
ret = regmap_read(data->regmap, MAX30102_REG_PART_ID, ®); |
|
if (ret) |
|
return ret; |
|
if (reg != MAX30102_PART_NUMBER) |
|
return -ENODEV; |
|
|
|
/* show revision ID */ |
|
ret = regmap_read(data->regmap, MAX30102_REG_REV_ID, ®); |
|
if (ret) |
|
return ret; |
|
dev_dbg(&client->dev, "max3010x revision %02x\n", reg); |
|
|
|
/* clear mode setting, chip shutdown */ |
|
ret = max30102_set_powermode(data, MAX30102_REG_MODE_CONFIG_MODE_NONE, |
|
false); |
|
if (ret) |
|
return ret; |
|
|
|
ret = max30102_chip_init(data); |
|
if (ret) |
|
return ret; |
|
|
|
if (client->irq <= 0) { |
|
dev_err(&client->dev, "no valid irq defined\n"); |
|
return -EINVAL; |
|
} |
|
|
|
ret = devm_request_threaded_irq(&client->dev, client->irq, |
|
NULL, max30102_interrupt_handler, |
|
IRQF_TRIGGER_FALLING | IRQF_ONESHOT, |
|
"max30102_irq", indio_dev); |
|
if (ret) { |
|
dev_err(&client->dev, "request irq (%d) failed\n", client->irq); |
|
return ret; |
|
} |
|
|
|
return iio_device_register(indio_dev); |
|
} |
|
|
|
static int max30102_remove(struct i2c_client *client) |
|
{ |
|
struct iio_dev *indio_dev = i2c_get_clientdata(client); |
|
struct max30102_data *data = iio_priv(indio_dev); |
|
|
|
iio_device_unregister(indio_dev); |
|
max30102_set_power(data, false); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct i2c_device_id max30102_id[] = { |
|
{ "max30102", max30102 }, |
|
{ "max30105", max30105 }, |
|
{} |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, max30102_id); |
|
|
|
static const struct of_device_id max30102_dt_ids[] = { |
|
{ .compatible = "maxim,max30102" }, |
|
{ .compatible = "maxim,max30105" }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(of, max30102_dt_ids); |
|
|
|
static struct i2c_driver max30102_driver = { |
|
.driver = { |
|
.name = MAX30102_DRV_NAME, |
|
.of_match_table = max30102_dt_ids, |
|
}, |
|
.probe = max30102_probe, |
|
.remove = max30102_remove, |
|
.id_table = max30102_id, |
|
}; |
|
module_i2c_driver(max30102_driver); |
|
|
|
MODULE_AUTHOR("Matt Ranostay <[email protected]>"); |
|
MODULE_DESCRIPTION("MAX30102 heart rate/pulse oximeter and MAX30105 particle sensor driver"); |
|
MODULE_LICENSE("GPL");
|
|
|