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iio: accel: adxl380: add support for ADXL318 and ADXL319 

The ADXL318 and ADXL319 are low noise density, low power, 3-axis
accelerometers based on ADXL380 and ADXL382, respectively. The main
difference between the new parts and the existing ones are the absence
of interrupts and events like tap detection, activity/inactivity, and
free-fall detection.

Other differences in the new parts are fewer power modes, basically
allowing only idle and measurement modes, and the removal of the 12-bit
SAR ADC path for the 3-axis signals (known as lower signal chain),
being excluisive for the temperature sensor in the ADXL318/319.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Santos <Jonathan.Santos@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
pull/1354/merge
Jonathan Santos 2025-11-14 19:14:02 -03:00 committed by Jonathan Cameron
parent 8775ebd25a
commit 0ecad19643
4 changed files with 107 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

134
drivers/iio/accel/adxl380.c
View File

@ -26,7 +26,9 @@
#include "adxl380.h"
#define ADXL380_ID_VAL 380
#define ADXL318_ID_VAL 380
#define ADXL382_ID_VAL 382
#define ADXL319_ID_VAL 382
#define ADXL380_DEVID_AD_REG 0x00
#define ADLX380_PART_ID_REG 0x02
@ -178,41 +180,6 @@ enum adxl380_tap_time_type {
static const int adxl380_range_scale_factor_tbl[] = { 1, 2, 4 };
const struct adxl380_chip_info adxl380_chip_info = {
.name = "adxl380",
.chip_id = ADXL380_ID_VAL,
.scale_tbl = {
[ADXL380_OP_MODE_4G_RANGE] = { 0, 1307226 },
[ADXL380_OP_MODE_8G_RANGE] = { 0, 2615434 },
[ADXL380_OP_MODE_16G_RANGE] = { 0, 5229886 },
},
.samp_freq_tbl = { 8000, 16000, 32000 },
/*
* The datasheet defines an intercept of 470 LSB at 25 degC
* and a sensitivity of 10.2 LSB/C.
*/
.temp_offset = 25 * 102 / 10 - 470,
};
EXPORT_SYMBOL_NS_GPL(adxl380_chip_info, "IIO_ADXL380");
const struct adxl380_chip_info adxl382_chip_info = {
.name = "adxl382",
.chip_id = ADXL382_ID_VAL,
.scale_tbl = {
[ADXL382_OP_MODE_15G_RANGE] = { 0, 4903325 },
[ADXL382_OP_MODE_30G_RANGE] = { 0, 9806650 },
[ADXL382_OP_MODE_60G_RANGE] = { 0, 19613300 },
},
.samp_freq_tbl = { 16000, 32000, 64000 },
/*
* The datasheet defines an intercept of 570 LSB at 25 degC
* and a sensitivity of 10.2 LSB/C.
*/
.temp_offset = 25 * 102 / 10 - 570,
};
EXPORT_SYMBOL_NS_GPL(adxl382_chip_info, "IIO_ADXL380");
static const unsigned int adxl380_th_reg_high_addr[2] = {
[ADXL380_ACTIVITY] = ADXL380_THRESH_ACT_H_REG,
[ADXL380_INACTIVITY] = ADXL380_THRESH_INACT_H_REG,
@ -276,9 +243,14 @@ static int adxl380_set_measure_en(struct adxl380_state *st, bool en)
if (ret)
return ret;
/* Activity/ Inactivity detection available only in VLP/ULP mode */
if (FIELD_GET(ADXL380_ACT_EN_MSK, act_inact_ctl) ||
FIELD_GET(ADXL380_INACT_EN_MSK, act_inact_ctl))
/*
* Activity/Inactivity detection available only in VLP/ULP
* mode and for devices that support low power modes. Otherwise
* go straight to measure mode (same bits as ADXL380_OP_MODE_HP).
*/
if (st->chip_info->has_low_power &&
(FIELD_GET(ADXL380_ACT_EN_MSK, act_inact_ctl) ||
FIELD_GET(ADXL380_INACT_EN_MSK, act_inact_ctl)))
op_mode = ADXL380_OP_MODE_VLP;
else
op_mode = ADXL380_OP_MODE_HP;
@ -1618,6 +1590,15 @@ static int adxl380_set_watermark(struct iio_dev *indio_dev, unsigned int val)
return 0;
}
static const struct iio_info adxl318_info = {
.read_raw = adxl380_read_raw,
.read_avail = &adxl380_read_avail,
.write_raw = adxl380_write_raw,
.write_raw_get_fmt = adxl380_write_raw_get_fmt,
.debugfs_reg_access = &adxl380_reg_access,
.hwfifo_set_watermark = adxl380_set_watermark,
};
static const struct iio_info adxl380_info = {
.read_raw = adxl380_read_raw,
.read_avail = &adxl380_read_avail,
@ -1632,6 +1613,81 @@ static const struct iio_info adxl380_info = {
.hwfifo_set_watermark = adxl380_set_watermark,
};
const struct adxl380_chip_info adxl318_chip_info = {
.name = "adxl318",
.chip_id = ADXL318_ID_VAL,
.scale_tbl = {
[ADXL380_OP_MODE_4G_RANGE] = { 0, 1307226 },
[ADXL380_OP_MODE_8G_RANGE] = { 0, 2615434 },
[ADXL380_OP_MODE_16G_RANGE] = { 0, 5229886 },
},
.samp_freq_tbl = { 8000, 16000, 32000 },
/*
* The datasheet defines an intercept of 550 LSB at 25 degC
* and a sensitivity of 10.2 LSB/C.
*/
.temp_offset = 25 * 102 / 10 - 550,
.info = &adxl318_info,
};
EXPORT_SYMBOL_NS_GPL(adxl318_chip_info, "IIO_ADXL380");
const struct adxl380_chip_info adxl319_chip_info = {
.name = "adxl319",
.chip_id = ADXL319_ID_VAL,
.scale_tbl = {
[ADXL382_OP_MODE_15G_RANGE] = { 0, 4903325 },
[ADXL382_OP_MODE_30G_RANGE] = { 0, 9806650 },
[ADXL382_OP_MODE_60G_RANGE] = { 0, 19613300 },
},
.samp_freq_tbl = { 16000, 32000, 64000 },
/*
* The datasheet defines an intercept of 550 LSB at 25 degC
* and a sensitivity of 10.2 LSB/C.
*/
.temp_offset = 25 * 102 / 10 - 550,
.info = &adxl318_info,
};
EXPORT_SYMBOL_NS_GPL(adxl319_chip_info, "IIO_ADXL380");
const struct adxl380_chip_info adxl380_chip_info = {
.name = "adxl380",
.chip_id = ADXL380_ID_VAL,
.scale_tbl = {
[ADXL380_OP_MODE_4G_RANGE] = { 0, 1307226 },
[ADXL380_OP_MODE_8G_RANGE] = { 0, 2615434 },
[ADXL380_OP_MODE_16G_RANGE] = { 0, 5229886 },
},
.samp_freq_tbl = { 8000, 16000, 32000 },
/*
* The datasheet defines an intercept of 470 LSB at 25 degC
* and a sensitivity of 10.2 LSB/C.
*/
.temp_offset = 25 * 102 / 10 - 470,
.has_low_power = true,
.info = &adxl380_info,
};
EXPORT_SYMBOL_NS_GPL(adxl380_chip_info, "IIO_ADXL380");
const struct adxl380_chip_info adxl382_chip_info = {
.name = "adxl382",
.chip_id = ADXL382_ID_VAL,
.scale_tbl = {
[ADXL382_OP_MODE_15G_RANGE] = { 0, 4903325 },
[ADXL382_OP_MODE_30G_RANGE] = { 0, 9806650 },
[ADXL382_OP_MODE_60G_RANGE] = { 0, 19613300 },
},
.samp_freq_tbl = { 16000, 32000, 64000 },
/*
* The datasheet defines an intercept of 570 LSB at 25 degC
* and a sensitivity of 10.2 LSB/C.
*/
.temp_offset = 25 * 102 / 10 - 570,
.has_low_power = true,
.info = &adxl380_info,
};
EXPORT_SYMBOL_NS_GPL(adxl382_chip_info, "IIO_ADXL380");
static const struct iio_event_spec adxl380_events[] = {
{
.type = IIO_EV_TYPE_THRESH,
@ -1866,7 +1922,7 @@ int adxl380_probe(struct device *dev, struct regmap *regmap,
indio_dev->channels = adxl380_channels;
indio_dev->num_channels = ARRAY_SIZE(adxl380_channels);
indio_dev->name = chip_info->name;
indio_dev->info = &adxl380_info;
indio_dev->info = chip_info->info;
indio_dev->modes = INDIO_DIRECT_MODE;
ret = devm_regulator_get_enable(dev, "vddio");

4
drivers/iio/accel/adxl380.h
View File

@ -12,10 +12,14 @@ struct adxl380_chip_info {
const char *name;
const int scale_tbl[3][2];
const int samp_freq_tbl[3];
const struct iio_info *info;
const int temp_offset;
const u16 chip_id;
const bool has_low_power;
};
extern const struct adxl380_chip_info adxl318_chip_info;
extern const struct adxl380_chip_info adxl319_chip_info;
extern const struct adxl380_chip_info adxl380_chip_info;
extern const struct adxl380_chip_info adxl382_chip_info;

4
drivers/iio/accel/adxl380_i2c.c
View File

@ -33,6 +33,8 @@ static int adxl380_i2c_probe(struct i2c_client *client)
}
static const struct i2c_device_id adxl380_i2c_id[] = {
{ "adxl318", (kernel_ulong_t)&adxl318_chip_info },
{ "adxl319", (kernel_ulong_t)&adxl319_chip_info },
{ "adxl380", (kernel_ulong_t)&adxl380_chip_info },
{ "adxl382", (kernel_ulong_t)&adxl382_chip_info },
{ }
@ -40,6 +42,8 @@ static const struct i2c_device_id adxl380_i2c_id[] = {
MODULE_DEVICE_TABLE(i2c, adxl380_i2c_id);
static const struct of_device_id adxl380_of_match[] = {
{ .compatible = "adi,adxl318", .data = &adxl318_chip_info },
{ .compatible = "adi,adxl319", .data = &adxl319_chip_info },
{ .compatible = "adi,adxl380", .data = &adxl380_chip_info },
{ .compatible = "adi,adxl382", .data = &adxl382_chip_info },
{ }

4
drivers/iio/accel/adxl380_spi.c
View File

@ -35,6 +35,8 @@ static int adxl380_spi_probe(struct spi_device *spi)
}
static const struct spi_device_id adxl380_spi_id[] = {
{ "adxl318", (kernel_ulong_t)&adxl318_chip_info },
{ "adxl319", (kernel_ulong_t)&adxl319_chip_info },
{ "adxl380", (kernel_ulong_t)&adxl380_chip_info },
{ "adxl382", (kernel_ulong_t)&adxl382_chip_info },
{ }
@ -42,6 +44,8 @@ static const struct spi_device_id adxl380_spi_id[] = {
MODULE_DEVICE_TABLE(spi, adxl380_spi_id);
static const struct of_device_id adxl380_of_match[] = {
{ .compatible = "adi,adxl318", .data = &adxl318_chip_info },
{ .compatible = "adi,adxl319", .data = &adxl319_chip_info },
{ .compatible = "adi,adxl380", .data = &adxl380_chip_info },
{ .compatible = "adi,adxl382", .data = &adxl382_chip_info },
{ }