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.
621 lines
16 KiB
621 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* AFE4403 Heart Rate Monitors and Low-Cost Pulse Oximeters |
|
* |
|
* Copyright (C) 2015-2016 Texas Instruments Incorporated - https://www.ti.com/ |
|
* Andrew F. Davis <[email protected]> |
|
*/ |
|
|
|
#include <linux/device.h> |
|
#include <linux/err.h> |
|
#include <linux/interrupt.h> |
|
#include <linux/kernel.h> |
|
#include <linux/module.h> |
|
#include <linux/regmap.h> |
|
#include <linux/spi/spi.h> |
|
#include <linux/sysfs.h> |
|
#include <linux/regulator/consumer.h> |
|
|
|
#include <linux/iio/iio.h> |
|
#include <linux/iio/sysfs.h> |
|
#include <linux/iio/buffer.h> |
|
#include <linux/iio/trigger.h> |
|
#include <linux/iio/triggered_buffer.h> |
|
#include <linux/iio/trigger_consumer.h> |
|
|
|
#include <asm/unaligned.h> |
|
|
|
#include "afe440x.h" |
|
|
|
#define AFE4403_DRIVER_NAME "afe4403" |
|
|
|
/* AFE4403 Registers */ |
|
#define AFE4403_TIAGAIN 0x20 |
|
#define AFE4403_TIA_AMB_GAIN 0x21 |
|
|
|
enum afe4403_fields { |
|
/* Gains */ |
|
F_RF_LED1, F_CF_LED1, |
|
F_RF_LED, F_CF_LED, |
|
|
|
/* LED Current */ |
|
F_ILED1, F_ILED2, |
|
|
|
/* sentinel */ |
|
F_MAX_FIELDS |
|
}; |
|
|
|
static const struct reg_field afe4403_reg_fields[] = { |
|
/* Gains */ |
|
[F_RF_LED1] = REG_FIELD(AFE4403_TIAGAIN, 0, 2), |
|
[F_CF_LED1] = REG_FIELD(AFE4403_TIAGAIN, 3, 7), |
|
[F_RF_LED] = REG_FIELD(AFE4403_TIA_AMB_GAIN, 0, 2), |
|
[F_CF_LED] = REG_FIELD(AFE4403_TIA_AMB_GAIN, 3, 7), |
|
/* LED Current */ |
|
[F_ILED1] = REG_FIELD(AFE440X_LEDCNTRL, 0, 7), |
|
[F_ILED2] = REG_FIELD(AFE440X_LEDCNTRL, 8, 15), |
|
}; |
|
|
|
/** |
|
* struct afe4403_data - AFE4403 device instance data |
|
* @dev: Device structure |
|
* @spi: SPI device handle |
|
* @regmap: Register map of the device |
|
* @fields: Register fields of the device |
|
* @regulator: Pointer to the regulator for the IC |
|
* @trig: IIO trigger for this device |
|
* @irq: ADC_RDY line interrupt number |
|
* @buffer: Used to construct data layout to push into IIO buffer. |
|
*/ |
|
struct afe4403_data { |
|
struct device *dev; |
|
struct spi_device *spi; |
|
struct regmap *regmap; |
|
struct regmap_field *fields[F_MAX_FIELDS]; |
|
struct regulator *regulator; |
|
struct iio_trigger *trig; |
|
int irq; |
|
/* Ensure suitable alignment for timestamp */ |
|
s32 buffer[8] __aligned(8); |
|
}; |
|
|
|
enum afe4403_chan_id { |
|
LED2 = 1, |
|
ALED2, |
|
LED1, |
|
ALED1, |
|
LED2_ALED2, |
|
LED1_ALED1, |
|
}; |
|
|
|
static const unsigned int afe4403_channel_values[] = { |
|
[LED2] = AFE440X_LED2VAL, |
|
[ALED2] = AFE440X_ALED2VAL, |
|
[LED1] = AFE440X_LED1VAL, |
|
[ALED1] = AFE440X_ALED1VAL, |
|
[LED2_ALED2] = AFE440X_LED2_ALED2VAL, |
|
[LED1_ALED1] = AFE440X_LED1_ALED1VAL, |
|
}; |
|
|
|
static const unsigned int afe4403_channel_leds[] = { |
|
[LED2] = F_ILED2, |
|
[LED1] = F_ILED1, |
|
}; |
|
|
|
static const struct iio_chan_spec afe4403_channels[] = { |
|
/* ADC values */ |
|
AFE440X_INTENSITY_CHAN(LED2, 0), |
|
AFE440X_INTENSITY_CHAN(ALED2, 0), |
|
AFE440X_INTENSITY_CHAN(LED1, 0), |
|
AFE440X_INTENSITY_CHAN(ALED1, 0), |
|
AFE440X_INTENSITY_CHAN(LED2_ALED2, 0), |
|
AFE440X_INTENSITY_CHAN(LED1_ALED1, 0), |
|
/* LED current */ |
|
AFE440X_CURRENT_CHAN(LED2), |
|
AFE440X_CURRENT_CHAN(LED1), |
|
}; |
|
|
|
static const struct afe440x_val_table afe4403_res_table[] = { |
|
{ 500000 }, { 250000 }, { 100000 }, { 50000 }, |
|
{ 25000 }, { 10000 }, { 1000000 }, { 0 }, |
|
}; |
|
AFE440X_TABLE_ATTR(in_intensity_resistance_available, afe4403_res_table); |
|
|
|
static const struct afe440x_val_table afe4403_cap_table[] = { |
|
{ 0, 5000 }, { 0, 10000 }, { 0, 20000 }, { 0, 25000 }, |
|
{ 0, 30000 }, { 0, 35000 }, { 0, 45000 }, { 0, 50000 }, |
|
{ 0, 55000 }, { 0, 60000 }, { 0, 70000 }, { 0, 75000 }, |
|
{ 0, 80000 }, { 0, 85000 }, { 0, 95000 }, { 0, 100000 }, |
|
{ 0, 155000 }, { 0, 160000 }, { 0, 170000 }, { 0, 175000 }, |
|
{ 0, 180000 }, { 0, 185000 }, { 0, 195000 }, { 0, 200000 }, |
|
{ 0, 205000 }, { 0, 210000 }, { 0, 220000 }, { 0, 225000 }, |
|
{ 0, 230000 }, { 0, 235000 }, { 0, 245000 }, { 0, 250000 }, |
|
}; |
|
AFE440X_TABLE_ATTR(in_intensity_capacitance_available, afe4403_cap_table); |
|
|
|
static ssize_t afe440x_show_register(struct device *dev, |
|
struct device_attribute *attr, |
|
char *buf) |
|
{ |
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev); |
|
struct afe4403_data *afe = iio_priv(indio_dev); |
|
struct afe440x_attr *afe440x_attr = to_afe440x_attr(attr); |
|
unsigned int reg_val; |
|
int vals[2]; |
|
int ret; |
|
|
|
ret = regmap_field_read(afe->fields[afe440x_attr->field], ®_val); |
|
if (ret) |
|
return ret; |
|
|
|
if (reg_val >= afe440x_attr->table_size) |
|
return -EINVAL; |
|
|
|
vals[0] = afe440x_attr->val_table[reg_val].integer; |
|
vals[1] = afe440x_attr->val_table[reg_val].fract; |
|
|
|
return iio_format_value(buf, IIO_VAL_INT_PLUS_MICRO, 2, vals); |
|
} |
|
|
|
static ssize_t afe440x_store_register(struct device *dev, |
|
struct device_attribute *attr, |
|
const char *buf, size_t count) |
|
{ |
|
struct iio_dev *indio_dev = dev_to_iio_dev(dev); |
|
struct afe4403_data *afe = iio_priv(indio_dev); |
|
struct afe440x_attr *afe440x_attr = to_afe440x_attr(attr); |
|
int val, integer, fract, ret; |
|
|
|
ret = iio_str_to_fixpoint(buf, 100000, &integer, &fract); |
|
if (ret) |
|
return ret; |
|
|
|
for (val = 0; val < afe440x_attr->table_size; val++) |
|
if (afe440x_attr->val_table[val].integer == integer && |
|
afe440x_attr->val_table[val].fract == fract) |
|
break; |
|
if (val == afe440x_attr->table_size) |
|
return -EINVAL; |
|
|
|
ret = regmap_field_write(afe->fields[afe440x_attr->field], val); |
|
if (ret) |
|
return ret; |
|
|
|
return count; |
|
} |
|
|
|
static AFE440X_ATTR(in_intensity1_resistance, F_RF_LED, afe4403_res_table); |
|
static AFE440X_ATTR(in_intensity1_capacitance, F_CF_LED, afe4403_cap_table); |
|
|
|
static AFE440X_ATTR(in_intensity2_resistance, F_RF_LED, afe4403_res_table); |
|
static AFE440X_ATTR(in_intensity2_capacitance, F_CF_LED, afe4403_cap_table); |
|
|
|
static AFE440X_ATTR(in_intensity3_resistance, F_RF_LED1, afe4403_res_table); |
|
static AFE440X_ATTR(in_intensity3_capacitance, F_CF_LED1, afe4403_cap_table); |
|
|
|
static AFE440X_ATTR(in_intensity4_resistance, F_RF_LED1, afe4403_res_table); |
|
static AFE440X_ATTR(in_intensity4_capacitance, F_CF_LED1, afe4403_cap_table); |
|
|
|
static struct attribute *afe440x_attributes[] = { |
|
&dev_attr_in_intensity_resistance_available.attr, |
|
&dev_attr_in_intensity_capacitance_available.attr, |
|
&afe440x_attr_in_intensity1_resistance.dev_attr.attr, |
|
&afe440x_attr_in_intensity1_capacitance.dev_attr.attr, |
|
&afe440x_attr_in_intensity2_resistance.dev_attr.attr, |
|
&afe440x_attr_in_intensity2_capacitance.dev_attr.attr, |
|
&afe440x_attr_in_intensity3_resistance.dev_attr.attr, |
|
&afe440x_attr_in_intensity3_capacitance.dev_attr.attr, |
|
&afe440x_attr_in_intensity4_resistance.dev_attr.attr, |
|
&afe440x_attr_in_intensity4_capacitance.dev_attr.attr, |
|
NULL |
|
}; |
|
|
|
static const struct attribute_group afe440x_attribute_group = { |
|
.attrs = afe440x_attributes |
|
}; |
|
|
|
static int afe4403_read(struct afe4403_data *afe, unsigned int reg, u32 *val) |
|
{ |
|
u8 tx[4] = {AFE440X_CONTROL0, 0x0, 0x0, AFE440X_CONTROL0_READ}; |
|
u8 rx[3]; |
|
int ret; |
|
|
|
/* Enable reading from the device */ |
|
ret = spi_write_then_read(afe->spi, tx, 4, NULL, 0); |
|
if (ret) |
|
return ret; |
|
|
|
ret = spi_write_then_read(afe->spi, ®, 1, rx, sizeof(rx)); |
|
if (ret) |
|
return ret; |
|
|
|
*val = get_unaligned_be24(&rx[0]); |
|
|
|
/* Disable reading from the device */ |
|
tx[3] = AFE440X_CONTROL0_WRITE; |
|
ret = spi_write_then_read(afe->spi, tx, 4, NULL, 0); |
|
if (ret) |
|
return ret; |
|
|
|
return 0; |
|
} |
|
|
|
static int afe4403_read_raw(struct iio_dev *indio_dev, |
|
struct iio_chan_spec const *chan, |
|
int *val, int *val2, long mask) |
|
{ |
|
struct afe4403_data *afe = iio_priv(indio_dev); |
|
unsigned int reg = afe4403_channel_values[chan->address]; |
|
unsigned int field = afe4403_channel_leds[chan->address]; |
|
int ret; |
|
|
|
switch (chan->type) { |
|
case IIO_INTENSITY: |
|
switch (mask) { |
|
case IIO_CHAN_INFO_RAW: |
|
ret = afe4403_read(afe, reg, val); |
|
if (ret) |
|
return ret; |
|
return IIO_VAL_INT; |
|
} |
|
break; |
|
case IIO_CURRENT: |
|
switch (mask) { |
|
case IIO_CHAN_INFO_RAW: |
|
ret = regmap_field_read(afe->fields[field], val); |
|
if (ret) |
|
return ret; |
|
return IIO_VAL_INT; |
|
case IIO_CHAN_INFO_SCALE: |
|
*val = 0; |
|
*val2 = 800000; |
|
return IIO_VAL_INT_PLUS_MICRO; |
|
} |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
return -EINVAL; |
|
} |
|
|
|
static int afe4403_write_raw(struct iio_dev *indio_dev, |
|
struct iio_chan_spec const *chan, |
|
int val, int val2, long mask) |
|
{ |
|
struct afe4403_data *afe = iio_priv(indio_dev); |
|
unsigned int field = afe4403_channel_leds[chan->address]; |
|
|
|
switch (chan->type) { |
|
case IIO_CURRENT: |
|
switch (mask) { |
|
case IIO_CHAN_INFO_RAW: |
|
return regmap_field_write(afe->fields[field], val); |
|
} |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
return -EINVAL; |
|
} |
|
|
|
static const struct iio_info afe4403_iio_info = { |
|
.attrs = &afe440x_attribute_group, |
|
.read_raw = afe4403_read_raw, |
|
.write_raw = afe4403_write_raw, |
|
}; |
|
|
|
static irqreturn_t afe4403_trigger_handler(int irq, void *private) |
|
{ |
|
struct iio_poll_func *pf = private; |
|
struct iio_dev *indio_dev = pf->indio_dev; |
|
struct afe4403_data *afe = iio_priv(indio_dev); |
|
int ret, bit, i = 0; |
|
u8 tx[4] = {AFE440X_CONTROL0, 0x0, 0x0, AFE440X_CONTROL0_READ}; |
|
u8 rx[3]; |
|
|
|
/* Enable reading from the device */ |
|
ret = spi_write_then_read(afe->spi, tx, 4, NULL, 0); |
|
if (ret) |
|
goto err; |
|
|
|
for_each_set_bit(bit, indio_dev->active_scan_mask, |
|
indio_dev->masklength) { |
|
ret = spi_write_then_read(afe->spi, |
|
&afe4403_channel_values[bit], 1, |
|
rx, sizeof(rx)); |
|
if (ret) |
|
goto err; |
|
|
|
afe->buffer[i++] = get_unaligned_be24(&rx[0]); |
|
} |
|
|
|
/* Disable reading from the device */ |
|
tx[3] = AFE440X_CONTROL0_WRITE; |
|
ret = spi_write_then_read(afe->spi, tx, 4, NULL, 0); |
|
if (ret) |
|
goto err; |
|
|
|
iio_push_to_buffers_with_timestamp(indio_dev, afe->buffer, |
|
pf->timestamp); |
|
err: |
|
iio_trigger_notify_done(indio_dev->trig); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static const struct iio_trigger_ops afe4403_trigger_ops = { |
|
}; |
|
|
|
#define AFE4403_TIMING_PAIRS \ |
|
{ AFE440X_LED2STC, 0x000050 }, \ |
|
{ AFE440X_LED2ENDC, 0x0003e7 }, \ |
|
{ AFE440X_LED1LEDSTC, 0x0007d0 }, \ |
|
{ AFE440X_LED1LEDENDC, 0x000bb7 }, \ |
|
{ AFE440X_ALED2STC, 0x000438 }, \ |
|
{ AFE440X_ALED2ENDC, 0x0007cf }, \ |
|
{ AFE440X_LED1STC, 0x000820 }, \ |
|
{ AFE440X_LED1ENDC, 0x000bb7 }, \ |
|
{ AFE440X_LED2LEDSTC, 0x000000 }, \ |
|
{ AFE440X_LED2LEDENDC, 0x0003e7 }, \ |
|
{ AFE440X_ALED1STC, 0x000c08 }, \ |
|
{ AFE440X_ALED1ENDC, 0x000f9f }, \ |
|
{ AFE440X_LED2CONVST, 0x0003ef }, \ |
|
{ AFE440X_LED2CONVEND, 0x0007cf }, \ |
|
{ AFE440X_ALED2CONVST, 0x0007d7 }, \ |
|
{ AFE440X_ALED2CONVEND, 0x000bb7 }, \ |
|
{ AFE440X_LED1CONVST, 0x000bbf }, \ |
|
{ AFE440X_LED1CONVEND, 0x009c3f }, \ |
|
{ AFE440X_ALED1CONVST, 0x000fa7 }, \ |
|
{ AFE440X_ALED1CONVEND, 0x001387 }, \ |
|
{ AFE440X_ADCRSTSTCT0, 0x0003e8 }, \ |
|
{ AFE440X_ADCRSTENDCT0, 0x0003eb }, \ |
|
{ AFE440X_ADCRSTSTCT1, 0x0007d0 }, \ |
|
{ AFE440X_ADCRSTENDCT1, 0x0007d3 }, \ |
|
{ AFE440X_ADCRSTSTCT2, 0x000bb8 }, \ |
|
{ AFE440X_ADCRSTENDCT2, 0x000bbb }, \ |
|
{ AFE440X_ADCRSTSTCT3, 0x000fa0 }, \ |
|
{ AFE440X_ADCRSTENDCT3, 0x000fa3 }, \ |
|
{ AFE440X_PRPCOUNT, 0x009c3f }, \ |
|
{ AFE440X_PDNCYCLESTC, 0x001518 }, \ |
|
{ AFE440X_PDNCYCLEENDC, 0x00991f } |
|
|
|
static const struct reg_sequence afe4403_reg_sequences[] = { |
|
AFE4403_TIMING_PAIRS, |
|
{ AFE440X_CONTROL1, AFE440X_CONTROL1_TIMEREN }, |
|
{ AFE4403_TIAGAIN, AFE440X_TIAGAIN_ENSEPGAIN }, |
|
}; |
|
|
|
static const struct regmap_range afe4403_yes_ranges[] = { |
|
regmap_reg_range(AFE440X_LED2VAL, AFE440X_LED1_ALED1VAL), |
|
}; |
|
|
|
static const struct regmap_access_table afe4403_volatile_table = { |
|
.yes_ranges = afe4403_yes_ranges, |
|
.n_yes_ranges = ARRAY_SIZE(afe4403_yes_ranges), |
|
}; |
|
|
|
static const struct regmap_config afe4403_regmap_config = { |
|
.reg_bits = 8, |
|
.val_bits = 24, |
|
|
|
.max_register = AFE440X_PDNCYCLEENDC, |
|
.cache_type = REGCACHE_RBTREE, |
|
.volatile_table = &afe4403_volatile_table, |
|
}; |
|
|
|
static const struct of_device_id afe4403_of_match[] = { |
|
{ .compatible = "ti,afe4403", }, |
|
{ /* sentinel */ } |
|
}; |
|
MODULE_DEVICE_TABLE(of, afe4403_of_match); |
|
|
|
static int __maybe_unused afe4403_suspend(struct device *dev) |
|
{ |
|
struct iio_dev *indio_dev = spi_get_drvdata(to_spi_device(dev)); |
|
struct afe4403_data *afe = iio_priv(indio_dev); |
|
int ret; |
|
|
|
ret = regmap_update_bits(afe->regmap, AFE440X_CONTROL2, |
|
AFE440X_CONTROL2_PDN_AFE, |
|
AFE440X_CONTROL2_PDN_AFE); |
|
if (ret) |
|
return ret; |
|
|
|
ret = regulator_disable(afe->regulator); |
|
if (ret) { |
|
dev_err(dev, "Unable to disable regulator\n"); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int __maybe_unused afe4403_resume(struct device *dev) |
|
{ |
|
struct iio_dev *indio_dev = spi_get_drvdata(to_spi_device(dev)); |
|
struct afe4403_data *afe = iio_priv(indio_dev); |
|
int ret; |
|
|
|
ret = regulator_enable(afe->regulator); |
|
if (ret) { |
|
dev_err(dev, "Unable to enable regulator\n"); |
|
return ret; |
|
} |
|
|
|
ret = regmap_update_bits(afe->regmap, AFE440X_CONTROL2, |
|
AFE440X_CONTROL2_PDN_AFE, 0); |
|
if (ret) |
|
return ret; |
|
|
|
return 0; |
|
} |
|
|
|
static SIMPLE_DEV_PM_OPS(afe4403_pm_ops, afe4403_suspend, afe4403_resume); |
|
|
|
static int afe4403_probe(struct spi_device *spi) |
|
{ |
|
struct iio_dev *indio_dev; |
|
struct afe4403_data *afe; |
|
int i, ret; |
|
|
|
indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*afe)); |
|
if (!indio_dev) |
|
return -ENOMEM; |
|
|
|
afe = iio_priv(indio_dev); |
|
spi_set_drvdata(spi, indio_dev); |
|
|
|
afe->dev = &spi->dev; |
|
afe->spi = spi; |
|
afe->irq = spi->irq; |
|
|
|
afe->regmap = devm_regmap_init_spi(spi, &afe4403_regmap_config); |
|
if (IS_ERR(afe->regmap)) { |
|
dev_err(afe->dev, "Unable to allocate register map\n"); |
|
return PTR_ERR(afe->regmap); |
|
} |
|
|
|
for (i = 0; i < F_MAX_FIELDS; i++) { |
|
afe->fields[i] = devm_regmap_field_alloc(afe->dev, afe->regmap, |
|
afe4403_reg_fields[i]); |
|
if (IS_ERR(afe->fields[i])) { |
|
dev_err(afe->dev, "Unable to allocate regmap fields\n"); |
|
return PTR_ERR(afe->fields[i]); |
|
} |
|
} |
|
|
|
afe->regulator = devm_regulator_get(afe->dev, "tx_sup"); |
|
if (IS_ERR(afe->regulator)) { |
|
dev_err(afe->dev, "Unable to get regulator\n"); |
|
return PTR_ERR(afe->regulator); |
|
} |
|
ret = regulator_enable(afe->regulator); |
|
if (ret) { |
|
dev_err(afe->dev, "Unable to enable regulator\n"); |
|
return ret; |
|
} |
|
|
|
ret = regmap_write(afe->regmap, AFE440X_CONTROL0, |
|
AFE440X_CONTROL0_SW_RESET); |
|
if (ret) { |
|
dev_err(afe->dev, "Unable to reset device\n"); |
|
goto err_disable_reg; |
|
} |
|
|
|
ret = regmap_multi_reg_write(afe->regmap, afe4403_reg_sequences, |
|
ARRAY_SIZE(afe4403_reg_sequences)); |
|
if (ret) { |
|
dev_err(afe->dev, "Unable to set register defaults\n"); |
|
goto err_disable_reg; |
|
} |
|
|
|
indio_dev->modes = INDIO_DIRECT_MODE; |
|
indio_dev->channels = afe4403_channels; |
|
indio_dev->num_channels = ARRAY_SIZE(afe4403_channels); |
|
indio_dev->name = AFE4403_DRIVER_NAME; |
|
indio_dev->info = &afe4403_iio_info; |
|
|
|
if (afe->irq > 0) { |
|
afe->trig = devm_iio_trigger_alloc(afe->dev, |
|
"%s-dev%d", |
|
indio_dev->name, |
|
indio_dev->id); |
|
if (!afe->trig) { |
|
dev_err(afe->dev, "Unable to allocate IIO trigger\n"); |
|
ret = -ENOMEM; |
|
goto err_disable_reg; |
|
} |
|
|
|
iio_trigger_set_drvdata(afe->trig, indio_dev); |
|
|
|
afe->trig->ops = &afe4403_trigger_ops; |
|
afe->trig->dev.parent = afe->dev; |
|
|
|
ret = iio_trigger_register(afe->trig); |
|
if (ret) { |
|
dev_err(afe->dev, "Unable to register IIO trigger\n"); |
|
goto err_disable_reg; |
|
} |
|
|
|
ret = devm_request_threaded_irq(afe->dev, afe->irq, |
|
iio_trigger_generic_data_rdy_poll, |
|
NULL, IRQF_ONESHOT, |
|
AFE4403_DRIVER_NAME, |
|
afe->trig); |
|
if (ret) { |
|
dev_err(afe->dev, "Unable to request IRQ\n"); |
|
goto err_trig; |
|
} |
|
} |
|
|
|
ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, |
|
afe4403_trigger_handler, NULL); |
|
if (ret) { |
|
dev_err(afe->dev, "Unable to setup buffer\n"); |
|
goto err_trig; |
|
} |
|
|
|
ret = iio_device_register(indio_dev); |
|
if (ret) { |
|
dev_err(afe->dev, "Unable to register IIO device\n"); |
|
goto err_buff; |
|
} |
|
|
|
return 0; |
|
|
|
err_buff: |
|
iio_triggered_buffer_cleanup(indio_dev); |
|
err_trig: |
|
if (afe->irq > 0) |
|
iio_trigger_unregister(afe->trig); |
|
err_disable_reg: |
|
regulator_disable(afe->regulator); |
|
|
|
return ret; |
|
} |
|
|
|
static int afe4403_remove(struct spi_device *spi) |
|
{ |
|
struct iio_dev *indio_dev = spi_get_drvdata(spi); |
|
struct afe4403_data *afe = iio_priv(indio_dev); |
|
int ret; |
|
|
|
iio_device_unregister(indio_dev); |
|
|
|
iio_triggered_buffer_cleanup(indio_dev); |
|
|
|
if (afe->irq > 0) |
|
iio_trigger_unregister(afe->trig); |
|
|
|
ret = regulator_disable(afe->regulator); |
|
if (ret) { |
|
dev_err(afe->dev, "Unable to disable regulator\n"); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static const struct spi_device_id afe4403_ids[] = { |
|
{ "afe4403", 0 }, |
|
{ /* sentinel */ } |
|
}; |
|
MODULE_DEVICE_TABLE(spi, afe4403_ids); |
|
|
|
static struct spi_driver afe4403_spi_driver = { |
|
.driver = { |
|
.name = AFE4403_DRIVER_NAME, |
|
.of_match_table = afe4403_of_match, |
|
.pm = &afe4403_pm_ops, |
|
}, |
|
.probe = afe4403_probe, |
|
.remove = afe4403_remove, |
|
.id_table = afe4403_ids, |
|
}; |
|
module_spi_driver(afe4403_spi_driver); |
|
|
|
MODULE_AUTHOR("Andrew F. Davis <[email protected]>"); |
|
MODULE_DESCRIPTION("TI AFE4403 Heart Rate Monitor and Pulse Oximeter AFE"); |
|
MODULE_LICENSE("GPL v2");
|
|
|