ADXL355 is 3-axis MEMS Accelerometer. It offers low noise density, low 0g offset drift, low power with selectable measurement ranges. It also features programmable high-pass and low-pass filters. Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/adxl354_adxl355.pdf Signed-off-by: Puranjay Mohan <puranjay12@xxxxxxxxx> --- MAINTAINERS | 7 + drivers/iio/accel/Kconfig | 29 ++ drivers/iio/accel/Makefile | 3 + drivers/iio/accel/adxl355.h | 77 +++++ drivers/iio/accel/adxl355_core.c | 542 +++++++++++++++++++++++++++++++ drivers/iio/accel/adxl355_i2c.c | 63 ++++ drivers/iio/accel/adxl355_spi.c | 66 ++++ 7 files changed, 787 insertions(+) create mode 100644 drivers/iio/accel/adxl355.h create mode 100644 drivers/iio/accel/adxl355_core.c create mode 100644 drivers/iio/accel/adxl355_i2c.c create mode 100644 drivers/iio/accel/adxl355_spi.c diff --git a/MAINTAINERS b/MAINTAINERS index bd7aff0c1..461f2a192 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -586,6 +586,13 @@ W: http://ez.analog.com/community/linux-device-drivers F: Documentation/devicetree/bindings/iio/accel/adi,adxl345.yaml F: drivers/input/misc/adxl34x.c +ADXL355 THREE-AXIS DIGITAL ACCELEROMETER DRIVER +M: Puranjay Mohan <puranjay12@xxxxxxxxx> +L: linux-iio@xxxxxxxxxxxxxxx +S: Supported +F: drivers/iio/accel/adxl34x.c +F: Documentation/devicetree/bindings/iio/accel/adi,adxl355.yaml + ADXL372 THREE-AXIS DIGITAL ACCELEROMETER DRIVER M: Michael Hennerich <michael.hennerich@xxxxxxxxxx> S: Supported diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig index cceda3cec..d0c45c809 100644 --- a/drivers/iio/accel/Kconfig +++ b/drivers/iio/accel/Kconfig @@ -61,6 +61,35 @@ config ADXL345_SPI will be called adxl345_spi and you will also get adxl345_core for the core module. +config ADXL355 + tristate + +config ADXL355_I2C + tristate "Analog Devices ADXL355 3-Axis Digital Accelerometer I2C Driver" + depends on I2C + select ADXL355 + select REGMAP_I2C + help + Say Y here if you want to build i2c support for the Analog Devices + ADXL355 3-axis digital accelerometer. + + To compile this driver as a module, choose M here: the module + will be called adxl355_i2c and you will also get adxl355_core + for the core module. + +config ADXL355_SPI + tristate "Analog Devices ADXL355 3-Axis Digital Accelerometer SPI Driver" + depends on SPI + select ADXL355 + select REGMAP_SPI + help + Say Y here if you want to build spi support for the Analog Devices + ADXL355 3-axis digital accelerometer. + + To compile this driver as a module, choose M here: the module + will be called adxl355_spi and you will also get adxl355_core + for the core module. + config ADXL372 tristate select IIO_BUFFER diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile index 32cd1342a..0e4721d2d 100644 --- a/drivers/iio/accel/Makefile +++ b/drivers/iio/accel/Makefile @@ -9,6 +9,9 @@ obj-$(CONFIG_ADIS16209) += adis16209.o obj-$(CONFIG_ADXL345) += adxl345_core.o obj-$(CONFIG_ADXL345_I2C) += adxl345_i2c.o obj-$(CONFIG_ADXL345_SPI) += adxl345_spi.o +obj-$(CONFIG_ADXL355) += adxl355_core.o +obj-$(CONFIG_ADXL355_I2C) += adxl355_i2c.o +obj-$(CONFIG_ADXL355_SPI) += adxl355_spi.o obj-$(CONFIG_ADXL372) += adxl372.o obj-$(CONFIG_ADXL372_I2C) += adxl372_i2c.o obj-$(CONFIG_ADXL372_SPI) += adxl372_spi.o diff --git a/drivers/iio/accel/adxl355.h b/drivers/iio/accel/adxl355.h new file mode 100644 index 000000000..77d0d0a28 --- /dev/null +++ b/drivers/iio/accel/adxl355.h @@ -0,0 +1,77 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * ADXL355 3-Axis Digital Accelerometer + * + * Copyright (c) 2021 Puranjay Mohan <puranjay12@xxxxxxxxx> + */ + +#ifndef _ADXL355_H_ +#define _ADXL355_H_ + +#include <linux/regmap.h> + +/* ADXL355 Register Definitions */ +#define ADXL355_DEVID_AD 0x00 +#define ADXL355_DEVID_MST 0x01 +#define ADXL355_PARTID 0x02 +#define ADXL355_REVID 0x03 +#define ADXL355_STATUS 0x04 +#define ADXL355_FIFO_ENTRIES 0x05 +#define ADXL355_TEMP2 0x06 +#define ADXL355_XDATA3 0x08 +#define ADXL355_YDATA3 0x0B +#define ADXL355_ZDATA3 0x0E +#define ADXL355_FIFO_DATA 0x11 +#define ADXL355_OFFSET_X_H 0x1E +#define ADXL355_OFFSET_Y_H 0x20 +#define ADXL355_OFFSET_Z_H 0x22 +#define ADXL355_ACT_EN 0x24 +#define ADXL355_ACT_THRESH_H 0x25 +#define ADXL355_ACT_THRESH_L 0x26 +#define ADXL355_ACT_COUNT 0x27 +#define ADXL355_FILTER 0x28 +#define ADXL355_FIFO_SAMPLES 0x29 +#define ADXL355_INT_MAP 0x2A +#define ADXL355_SYNC 0x2B +#define ADXL355_RANGE 0x2C +#define ADXL355_POWER_CTL 0x2D +#define ADXL355_SELF_TEST 0x2E +#define ADXL355_RESET 0x2F + +#define ADXL355_DEVID_AD_VAL 0xAD +#define ADXL355_DEVID_MST_VAL 0x1D +#define ADXL355_PARTID_VAL 0xED +#define ADXL355_REVID_VAL 0x01 +#define ADXL355_RESET_CODE 0x52 + +#define ADXL355_POWER_CTL_MODE_MSK GENMASK(1, 0) + +#define ADXL355_FILTER_ODR_MSK GENMASK(3, 0) +#define ADXL355_FILTER_HPF_MSK GENMASK(6, 4) + +/* + * The datasheet defines an intercept of 1885 LSB at 25 degC + * and a slope of -9.05 LSB/C. The following formula can be used to find the + * temperature: + * Temp = ((RAW - 1885)/(-9.05)) + 25 but this doesn't follow the format of + * the IIO which is Temp = (RAW + OFFSET) * SCALE. Hence using some rearranging + * we get the scale as -110.49723 and offset as -2111.25 + */ +#define TEMP_SCALE_VAL -110 +#define TEMP_SCALE_VAL2 497238 +#define TEMP_OFFSET_VAL -2111 +#define TEMP_OFFSET_VAL2 250000 + +/* + * At +/- 2g with 20-bit resolution, scale is given in datasheet as + * 3.9ug/LSB = 0.0000039 * 9.80665 = 0.00003824593 m/s^2 + */ +#define ADXL355_NSCALE 38245 + +extern const struct regmap_access_table adxl355_readable_regs_tbl; + +extern const struct regmap_access_table adxl355_writeable_regs_tbl; + +int adxl355_core_probe(struct device *dev, struct regmap *regmap, + const char *name); +#endif /* _ADXL355_H_ */ diff --git a/drivers/iio/accel/adxl355_core.c b/drivers/iio/accel/adxl355_core.c new file mode 100644 index 000000000..313a3d2d1 --- /dev/null +++ b/drivers/iio/accel/adxl355_core.c @@ -0,0 +1,542 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * ADXL355 3-Axis Digital Accelerometer IIO core driver + * + * Copyright (c) 2021 Puranjay Mohan <puranjay12@xxxxxxxxx> + * + * Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/adxl354_adxl355.pdf + */ +#include <linux/bitfield.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/limits.h> +#include <linux/math64.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/regmap.h> + +#include "adxl355.h" + +static const struct regmap_range adxl355_read_reg_range[] = { + regmap_reg_range(ADXL355_DEVID_AD, ADXL355_FIFO_DATA), + regmap_reg_range(ADXL355_OFFSET_X_H, ADXL355_SELF_TEST) +}; + +const struct regmap_access_table adxl355_readable_regs_tbl = { + .yes_ranges = adxl355_read_reg_range, + .n_yes_ranges = ARRAY_SIZE(adxl355_read_reg_range), +}; +EXPORT_SYMBOL_GPL(adxl355_readable_regs_tbl); + +static const struct regmap_range adxl355_write_reg_range[] = { + regmap_reg_range(ADXL355_OFFSET_X_H, ADXL355_RESET) +}; + +const struct regmap_access_table adxl355_writeable_regs_tbl = { + .yes_ranges = adxl355_write_reg_range, + .n_yes_ranges = ARRAY_SIZE(adxl355_write_reg_range), +}; +EXPORT_SYMBOL_GPL(adxl355_writeable_regs_tbl); + +enum adxl355_op_mode { + ADXL355_MEASUREMENT, + ADXL355_STANDBY, + ADXL355_TEMP_OFF +}; + +enum adxl355_odr { + ADXL355_ODR_4000HZ, + ADXL355_ODR_2000HZ, + ADXL355_ODR_1000HZ, + ADXL355_ODR_500HZ, + ADXL355_ODR_250HZ, + ADXL355_ODR_125HZ, + ADXL355_ODR_62_5HZ, + ADXL355_ODR_31_25HZ, + ADXL355_ODR_15_625HZ, + ADXL355_ODR_7_813HZ, + ADXL355_ODR_3_906HZ +}; + +enum adxl355_hpf_3db { + ADXL355_HPF_OFF, + ADXL355_HPF_24_7, + ADXL355_HPF_6_2084, + ADXL355_HPF_1_5545, + ADXL355_HPF_0_3862, + ADXL355_HPF_0_0954, + ADXL355_HPF_0_0238 +}; + +static const int adxl355_odr_table[][2] = { + [0] = {4000, 0}, + [1] = {2000, 0}, + [2] = {1000, 0}, + [3] = {500, 0}, + [4] = {250, 0}, + [5] = {125, 0}, + [6] = {62, 500000}, + [7] = {31, 250000}, + [8] = {15, 625000}, + [9] = {7, 813000}, + [10] = {3, 906000} +}; + +static const int adxl355_hpf_3db_multipliers[] = { + 0, + 247000, + 62084, + 15545, + 3862, + 954, + 238 +}; + +struct adxl355_data { + struct regmap *regmap; + struct device *dev; + struct mutex lock; /* lock to protect op_mode */ + enum adxl355_op_mode op_mode; + enum adxl355_odr odr; + enum adxl355_hpf_3db hpf_3db; + int x_calibbias; + int y_calibbias; + int z_calibbias; + int adxl355_hpf_3db_table[7][2]; + u8 transf_buf[3] ____cacheline_aligned; +}; + +static int adxl355_set_op_mode(struct adxl355_data *data, + enum adxl355_op_mode op_mode) +{ + int ret; + + if (data->op_mode == op_mode) + return 0; + + ret = regmap_update_bits(data->regmap, ADXL355_POWER_CTL, + ADXL355_POWER_CTL_MODE_MSK, op_mode); + if (ret < 0) + return ret; + + data->op_mode = op_mode; + + return ret; +} + +static void adxl355_fill_3db_frequency_table(struct adxl355_data *data) +{ + int i; + u64 rem; + u64 div; + u32 multiplier; + u64 odr = mul_u64_u32_shr(adxl355_odr_table[data->odr][0], 1000000, 0) + + adxl355_odr_table[data->odr][1]; + + for (i = 0; i < ARRAY_SIZE(adxl355_hpf_3db_multipliers); i++) { + multiplier = adxl355_hpf_3db_multipliers[i]; + div = div64_u64_rem(mul_u64_u32_shr(odr, multiplier, 0), + 100000000000000UL, &rem); + + data->adxl355_hpf_3db_table[i][0] = div; + data->adxl355_hpf_3db_table[i][1] = div_u64(rem, 100000000); + } +} + +static int adxl355_setup(struct adxl355_data *data) +{ + unsigned int regval; + int ret; + + ret = regmap_read(data->regmap, ADXL355_DEVID_AD, ®val); + if (ret) + return ret; + + if (regval != ADXL355_DEVID_AD_VAL) { + dev_err(data->dev, "Invalid ADI ID 0x%02x\n", regval); + return -ENODEV; + } + + ret = regmap_read(data->regmap, ADXL355_DEVID_MST, ®val); + if (ret) + return ret; + + if (regval != ADXL355_DEVID_MST_VAL) { + dev_err(data->dev, "Invalid MEMS ID 0x%02x\n", regval); + return -ENODEV; + } + + ret = regmap_read(data->regmap, ADXL355_PARTID, ®val); + if (ret) + return ret; + + if (regval != ADXL355_PARTID_VAL) { + dev_err(data->dev, "Invalid DEV ID 0x%02x\n", regval); + return -ENODEV; + } + + /* + * Perform a software reset to make sure the device is in a consistent + * state after start up. + */ + ret = regmap_write(data->regmap, ADXL355_RESET, ADXL355_RESET_CODE); + if (ret) + return ret; + + adxl355_fill_3db_frequency_table(data); + + return adxl355_set_op_mode(data, ADXL355_MEASUREMENT); +} + +static int adxl355_get_temp_data(struct adxl355_data *data, u8 addr) +{ + return regmap_bulk_read(data->regmap, addr, data->transf_buf, 2); +} + +static int adxl355_read_axis(struct adxl355_data *data, u8 addr) +{ + int ret; + + ret = regmap_bulk_read(data->regmap, addr, data->transf_buf, 3); + if (ret < 0) + return ret; + ret = (data->transf_buf[0] << 16) + (data->transf_buf[1] << 8) + + (data->transf_buf[2] >> 4); + + return ret; +} + +static int adxl355_find_match(const int (*freq_tbl)[2], const int n, + const int val, const int val2) +{ + int i; + + for (i = 0; i < n; i++) { + if (freq_tbl[i][0] == val && freq_tbl[i][1] == val2) + return i; + } + + return -EINVAL; +} + +static int adxl355_set_odr(struct adxl355_data *data, + enum adxl355_odr odr) +{ + int ret = 0; + + mutex_lock(&data->lock); + + if (data->odr == odr) + goto out_unlock; + + ret = adxl355_set_op_mode(data, ADXL355_STANDBY); + if (ret < 0) + goto out_unlock; + + ret = regmap_update_bits(data->regmap, ADXL355_FILTER, + ADXL355_FILTER_ODR_MSK, + FIELD_PREP(ADXL355_FILTER_ODR_MSK, odr)); + if (ret < 0) + goto out_unlock; + + data->odr = odr; + adxl355_fill_3db_frequency_table(data); + +out_unlock: + ret = adxl355_set_op_mode(data, ADXL355_MEASUREMENT); + mutex_unlock(&data->lock); + return ret; +} + +static int adxl355_set_hpf_3db(struct adxl355_data *data, + enum adxl355_hpf_3db hpf) +{ + int ret = 0; + + mutex_lock(&data->lock); + + if (data->hpf_3db == hpf) + goto out_unlock; + + ret = adxl355_set_op_mode(data, ADXL355_STANDBY); + if (ret < 0) + goto out_unlock; + + ret = regmap_update_bits(data->regmap, ADXL355_FILTER, + ADXL355_FILTER_HPF_MSK, + FIELD_PREP(ADXL355_FILTER_HPF_MSK, hpf)); + if (!ret) + data->hpf_3db = hpf; + +out_unlock: + ret = adxl355_set_op_mode(data, ADXL355_MEASUREMENT); + mutex_unlock(&data->lock); + return ret; +} + +static int adxl355_set_calibbias(struct adxl355_data *data, + int channel2, int calibbias) +{ + int ret = 0; + + data->transf_buf[0] = (calibbias >> 8) & 0xFF; + data->transf_buf[1] = calibbias & 0xFF; + data->transf_buf[2] = 0; + + mutex_lock(&data->lock); + + ret = adxl355_set_op_mode(data, ADXL355_STANDBY); + if (ret < 0) + goto out_unlock; + + switch (channel2) { + case IIO_MOD_X: + ret = regmap_bulk_write(data->regmap, ADXL355_OFFSET_X_H, + data->transf_buf, 2); + if (ret < 0) + goto out_unlock; + data->x_calibbias = calibbias; + break; + case IIO_MOD_Y: + ret = regmap_bulk_write(data->regmap, ADXL355_OFFSET_Y_H, + data->transf_buf, 2); + if (ret < 0) + goto out_unlock; + data->y_calibbias = calibbias; + break; + case IIO_MOD_Z: + ret = regmap_bulk_write(data->regmap, ADXL355_OFFSET_Z_H, + data->transf_buf, 2); + if (ret < 0) + goto out_unlock; + data->z_calibbias = calibbias; + break; + default: + ret = -EINVAL; + break; + } + +out_unlock: + ret = adxl355_set_op_mode(data, ADXL355_MEASUREMENT); + mutex_unlock(&data->lock); + return ret; +} + +static int adxl355_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct adxl355_data *data = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + switch (chan->type) { + case IIO_TEMP: + ret = adxl355_get_temp_data(data, chan->address); + if (ret < 0) + return ret; + *val = (data->transf_buf[0] << 8) + data->transf_buf[1]; + + return IIO_VAL_INT; + case IIO_ACCEL: + ret = adxl355_read_axis(data, chan->address); + if (ret < 0) + return ret; + *val = sign_extend32(ret >> (chan->scan_type.shift), + chan->scan_type.realbits - 1); + return IIO_VAL_INT; + default: + return -EINVAL; + } + + case IIO_CHAN_INFO_SCALE: + switch (chan->type) { + case IIO_TEMP: + *val = TEMP_SCALE_VAL; + *val2 = TEMP_SCALE_VAL2; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_ACCEL: + *val = 0; + *val2 = ADXL355_NSCALE; + return IIO_VAL_INT_PLUS_NANO; + default: + return -EINVAL; + } + case IIO_CHAN_INFO_OFFSET: + *val = TEMP_OFFSET_VAL; + *val2 = TEMP_OFFSET_VAL2; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_CALIBBIAS: + if (chan->channel2 == IIO_MOD_X) + *val = data->x_calibbias; + else if (chan->channel2 == IIO_MOD_Y) + *val = data->y_calibbias; + else + *val = data->z_calibbias; + *val = sign_extend32(*val, 15); + return IIO_VAL_INT; + case IIO_CHAN_INFO_SAMP_FREQ: + *val = adxl355_odr_table[data->odr][0]; + *val2 = adxl355_odr_table[data->odr][1]; + return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY: + *val = data->adxl355_hpf_3db_table[data->hpf_3db][0]; + *val2 = data->adxl355_hpf_3db_table[data->hpf_3db][1]; + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } +} + +static int adxl355_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct adxl355_data *data = iio_priv(indio_dev); + int odr_idx, hpf_idx, calibbias; + + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + odr_idx = adxl355_find_match(adxl355_odr_table, + ARRAY_SIZE(adxl355_odr_table), + val, val2); + if (odr_idx < 0) + return odr_idx; + + return adxl355_set_odr(data, odr_idx); + case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY: + hpf_idx = adxl355_find_match(data->adxl355_hpf_3db_table, + ARRAY_SIZE(data->adxl355_hpf_3db_table), + val, val2); + if (hpf_idx < 0) + return hpf_idx; + + return adxl355_set_hpf_3db(data, hpf_idx); + case IIO_CHAN_INFO_CALIBBIAS: + calibbias = clamp_t(int, val, S16_MIN, S16_MAX); + + return adxl355_set_calibbias(data, chan->channel2, calibbias); + default: + return -EINVAL; + } +} + +static int adxl355_read_avail(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + const int **vals, int *type, int *length, + long mask) +{ + struct adxl355_data *data = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + *vals = (const int *)adxl355_odr_table; + *type = IIO_VAL_INT_PLUS_MICRO; + /* Values are stored in a 2D matrix */ + *length = ARRAY_SIZE(adxl355_odr_table) * 2; + + return IIO_AVAIL_LIST; + case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY: + *vals = (const int *)(data->adxl355_hpf_3db_table); + *type = IIO_VAL_INT_PLUS_MICRO; + /* Values are stored in a 2D matrix */ + *length = ARRAY_SIZE(data->adxl355_hpf_3db_table) * 2; + + return IIO_AVAIL_LIST; + default: + return -EINVAL; + } +} + +static const unsigned long adxl355_avail_scan_masks[] = { + GENMASK(3, 0), + 0 +}; + +static const struct iio_info adxl355_info = { + .read_raw = adxl355_read_raw, + .write_raw = adxl355_write_raw, + .read_avail = &adxl355_read_avail +}; + +#define ADXL355_ACCEL_CHANNEL(index, reg, axis) { \ + .type = IIO_ACCEL, \ + .address = reg, \ + .modified = 1, \ + .channel2 = IIO_MOD_##axis, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ + BIT(IIO_CHAN_INFO_CALIBBIAS), \ + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ + BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ + BIT(IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY), \ + .info_mask_shared_by_type_available = \ + BIT(IIO_CHAN_INFO_SAMP_FREQ) | \ + BIT(IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY), \ + .scan_index = index, \ + .scan_type = { \ + .sign = 's', \ + .realbits = 20, \ + .storagebits = 32, \ + .shift = 4, \ + .endianness = IIO_BE, \ + } \ +} + +static const struct iio_chan_spec adxl355_channels[] = { + ADXL355_ACCEL_CHANNEL(0, ADXL355_XDATA3, X), + ADXL355_ACCEL_CHANNEL(1, ADXL355_YDATA3, Y), + ADXL355_ACCEL_CHANNEL(2, ADXL355_ZDATA3, Z), + { + .type = IIO_TEMP, + .address = ADXL355_TEMP2, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_OFFSET), + .scan_index = 3, + .scan_type = { + .sign = 's', + .realbits = 12, + .storagebits = 16, + .endianness = IIO_BE, + }, + } +}; + +int adxl355_core_probe(struct device *dev, struct regmap *regmap, + const char *name) +{ + struct adxl355_data *data; + struct iio_dev *indio_dev; + int ret; + + indio_dev = devm_iio_device_alloc(dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + data = iio_priv(indio_dev); + data->regmap = regmap; + data->dev = dev; + data->op_mode = ADXL355_STANDBY; + mutex_init(&data->lock); + + indio_dev->name = name; + indio_dev->info = &adxl355_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = adxl355_channels; + indio_dev->num_channels = ARRAY_SIZE(adxl355_channels); + indio_dev->available_scan_masks = adxl355_avail_scan_masks; + + ret = adxl355_setup(data); + if (ret < 0) { + dev_err(dev, "ADXL355 setup failed\n"); + return ret; + } + + return devm_iio_device_register(dev, indio_dev); +} +EXPORT_SYMBOL_GPL(adxl355_core_probe); + +MODULE_AUTHOR("Puranjay Mohan <puranjay12@xxxxxxxxx>"); +MODULE_DESCRIPTION("ADXL355 3-Axis Digital Accelerometer core driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/accel/adxl355_i2c.c b/drivers/iio/accel/adxl355_i2c.c new file mode 100644 index 000000000..6b84d8df2 --- /dev/null +++ b/drivers/iio/accel/adxl355_i2c.c @@ -0,0 +1,63 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * ADXL355 3-Axis Digital Accelerometer I2C driver + * + * Copyright (c) 2021 Puranjay Mohan <puranjay12@xxxxxxxxx> + */ + +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/regmap.h> + +#include "adxl355.h" + +static const struct regmap_config adxl355_i2c_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0x2F, + .rd_table = &adxl355_readable_regs_tbl, + .wr_table = &adxl355_writeable_regs_tbl +}; + +static int adxl355_i2c_probe(struct i2c_client *client) +{ + struct regmap *regmap; + + regmap = devm_regmap_init_i2c(client, &adxl355_i2c_regmap_config); + if (IS_ERR(regmap)) { + dev_err(&client->dev, "Error initializing i2c regmap: %ld\n", + PTR_ERR(regmap)); + return PTR_ERR(regmap); + } + + return adxl355_core_probe(&client->dev, regmap, client->name); +} + +static const struct i2c_device_id adxl355_i2c_id[] = { + { "adxl355", 0 }, + { } +}; + +MODULE_DEVICE_TABLE(i2c, adxl355_i2c_id); + +static const struct of_device_id adxl355_of_match[] = { + { .compatible = "adi,adxl355" }, + { } +}; + +MODULE_DEVICE_TABLE(of, adxl355_of_match); + +static struct i2c_driver adxl355_i2c_driver = { + .driver = { + .name = "adxl355_i2c", + .of_match_table = adxl355_of_match, + }, + .probe_new = adxl355_i2c_probe, + .id_table = adxl355_i2c_id, +}; + +module_i2c_driver(adxl355_i2c_driver); + +MODULE_AUTHOR("Puranjay Mohan <puranjay12@xxxxxxxxx>"); +MODULE_DESCRIPTION("ADXL355 3-Axis Digital Accelerometer I2C driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/accel/adxl355_spi.c b/drivers/iio/accel/adxl355_spi.c new file mode 100644 index 000000000..108d1b308 --- /dev/null +++ b/drivers/iio/accel/adxl355_spi.c @@ -0,0 +1,66 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * ADXL355 3-Axis Digital Accelerometer SPI driver + * + * Copyright (c) 2021 Puranjay Mohan <puranjay12@xxxxxxxxx> + */ + +#include <linux/module.h> +#include <linux/regmap.h> +#include <linux/spi/spi.h> + +#include "adxl355.h" + +static const struct regmap_config adxl355_spi_regmap_config = { + .reg_bits = 7, + .pad_bits = 1, + .val_bits = 8, + .read_flag_mask = BIT(0), + .max_register = 0x2F, + .rd_table = &adxl355_readable_regs_tbl, + .wr_table = &adxl355_writeable_regs_tbl +}; + +static int adxl355_spi_probe(struct spi_device *spi) +{ + const struct spi_device_id *id = spi_get_device_id(spi); + struct regmap *regmap; + + regmap = devm_regmap_init_spi(spi, &adxl355_spi_regmap_config); + if (IS_ERR(regmap)) { + dev_err(&spi->dev, "Error initializing spi regmap: %ld\n", + PTR_ERR(regmap)); + return PTR_ERR(regmap); + } + + return adxl355_core_probe(&spi->dev, regmap, id->name); +} + +static const struct spi_device_id adxl355_spi_id[] = { + { "adxl355", 0 }, + { } +}; + +MODULE_DEVICE_TABLE(spi, adxl355_spi_id); + +static const struct of_device_id adxl355_of_match[] = { + { .compatible = "adi,adxl355" }, + { } +}; + +MODULE_DEVICE_TABLE(of, adxl355_of_match); + +static struct spi_driver adxl355_spi_driver = { + .driver = { + .name = "adxl355_spi", + .of_match_table = adxl355_of_match, + }, + .probe = adxl355_spi_probe, + .id_table = adxl355_spi_id, +}; + +module_spi_driver(adxl355_spi_driver); + +MODULE_AUTHOR("Puranjay Mohan <puranjay12@xxxxxxxxx>"); +MODULE_DESCRIPTION("ADXL355 3-Axis Digital Accelerometer SPI driver"); +MODULE_LICENSE("GPL v2"); -- 2.30.1
