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drivers: iio: accel: Add support for ADXL359 device
Add support for ADXL359 device in already existing ADXL355 driver. Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/adxl359.pdf Signed-off-by: Ramona Bolboaca <ramona.bolboaca@analog.com> Link: https://lore.kernel.org/r/20221031105129.47740-4-ramona.bolboaca@analog.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Ramona Bolboaca
Jonathan Cameron
parent
b311d2e170
commit
d3532d6975
@ -10,12 +10,30 @@
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#include <linux/regmap.h>
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enum adxl355_device_type {
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ADXL355,
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ADXL359,
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};
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struct adxl355_fractional_type {
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int integer;
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int decimal;
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};
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struct device;
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struct adxl355_chip_info {
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const char *name;
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u8 part_id;
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struct adxl355_fractional_type accel_scale;
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struct adxl355_fractional_type temp_offset;
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};
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extern const struct regmap_access_table adxl355_readable_regs_tbl;
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extern const struct regmap_access_table adxl355_writeable_regs_tbl;
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extern const struct adxl355_chip_info adxl35x_chip_info[];
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int adxl355_core_probe(struct device *dev, struct regmap *regmap,
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const char *name);
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const struct adxl355_chip_info *chip_info);
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#endif /* _ADXL355_H_ */
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@ -60,6 +60,7 @@
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#define ADXL355_DEVID_AD_VAL 0xAD
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#define ADXL355_DEVID_MST_VAL 0x1D
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#define ADXL355_PARTID_VAL 0xED
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#define ADXL359_PARTID_VAL 0xE9
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#define ADXL355_RESET_CODE 0x52
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static const struct regmap_range adxl355_read_reg_range[] = {
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@ -83,6 +84,60 @@ const struct regmap_access_table adxl355_writeable_regs_tbl = {
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};
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EXPORT_SYMBOL_NS_GPL(adxl355_writeable_regs_tbl, IIO_ADXL355);
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const struct adxl355_chip_info adxl35x_chip_info[] = {
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[ADXL355] = {
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.name = "adxl355",
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.part_id = ADXL355_PARTID_VAL,
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/*
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* At +/- 2g with 20-bit resolution, scale is given in datasheet
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* as 3.9ug/LSB = 0.0000039 * 9.80665 = 0.00003824593 m/s^2.
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*/
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.accel_scale = {
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.integer = 0,
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.decimal = 38245,
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},
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/*
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* The datasheet defines an intercept of 1885 LSB at 25 degC
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* and a slope of -9.05 LSB/C. The following formula can be used
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* to find the temperature:
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* Temp = ((RAW - 1885)/(-9.05)) + 25 but this doesn't follow
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* the format of the IIO which is Temp = (RAW + OFFSET) * SCALE.
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* Hence using some rearranging we get the scale as -110.497238
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* and offset as -2111.25.
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*/
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.temp_offset = {
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.integer = -2111,
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.decimal = 250000,
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},
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},
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[ADXL359] = {
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.name = "adxl359",
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.part_id = ADXL359_PARTID_VAL,
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/*
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* At +/- 10g with 20-bit resolution, scale is given in datasheet
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* as 19.5ug/LSB = 0.0000195 * 9.80665 = 0.0.00019122967 m/s^2.
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*/
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.accel_scale = {
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.integer = 0,
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.decimal = 191229,
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},
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/*
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* The datasheet defines an intercept of 1852 LSB at 25 degC
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* and a slope of -9.05 LSB/C. The following formula can be used
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* to find the temperature:
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* Temp = ((RAW - 1852)/(-9.05)) + 25 but this doesn't follow
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* the format of the IIO which is Temp = (RAW + OFFSET) * SCALE.
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* Hence using some rearranging we get the scale as -110.497238
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* and offset as -2079.25.
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*/
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.temp_offset = {
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.integer = -2079,
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.decimal = 250000,
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},
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},
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};
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EXPORT_SYMBOL_NS_GPL(adxl35x_chip_info, IIO_ADXL355);
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enum adxl355_op_mode {
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ADXL355_MEASUREMENT,
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ADXL355_STANDBY,
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@ -162,6 +217,7 @@ static const struct adxl355_chan_info adxl355_chans[] = {
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};
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struct adxl355_data {
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const struct adxl355_chip_info *chip_info;
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struct regmap *regmap;
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struct device *dev;
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struct mutex lock; /* lock to protect op_mode */
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@ -456,33 +512,25 @@ static int adxl355_read_raw(struct iio_dev *indio_dev,
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case IIO_CHAN_INFO_SCALE:
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switch (chan->type) {
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/*
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* The datasheet defines an intercept of 1885 LSB at 25 degC
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* and a slope of -9.05 LSB/C. The following formula can be used
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* to find the temperature:
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* Temp = ((RAW - 1885)/(-9.05)) + 25 but this doesn't follow
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* the format of the IIO which is Temp = (RAW + OFFSET) * SCALE.
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* Hence using some rearranging we get the scale as -110.497238
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* and offset as -2111.25.
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*/
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case IIO_TEMP:
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/*
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* Temperature scale is -110.497238.
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* See the detailed explanation in adxl35x_chip_info
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* definition above.
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*/
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*val = -110;
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*val2 = 497238;
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return IIO_VAL_INT_PLUS_MICRO;
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/*
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* At +/- 2g with 20-bit resolution, scale is given in datasheet
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* as 3.9ug/LSB = 0.0000039 * 9.80665 = 0.00003824593 m/s^2.
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*/
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case IIO_ACCEL:
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*val = 0;
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*val2 = 38245;
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*val = data->chip_info->accel_scale.integer;
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*val2 = data->chip_info->accel_scale.decimal;
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return IIO_VAL_INT_PLUS_NANO;
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default:
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return -EINVAL;
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}
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case IIO_CHAN_INFO_OFFSET:
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*val = -2111;
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*val2 = 250000;
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*val = data->chip_info->temp_offset.integer;
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*val2 = data->chip_info->temp_offset.decimal;
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return IIO_VAL_INT_PLUS_MICRO;
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case IIO_CHAN_INFO_CALIBBIAS:
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*val = sign_extend32(data->calibbias[chan->address], 15);
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@ -705,7 +753,7 @@ static int adxl355_probe_trigger(struct iio_dev *indio_dev, int irq)
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}
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int adxl355_core_probe(struct device *dev, struct regmap *regmap,
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const char *name)
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const struct adxl355_chip_info *chip_info)
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{
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struct adxl355_data *data;
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struct iio_dev *indio_dev;
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@ -720,9 +768,10 @@ int adxl355_core_probe(struct device *dev, struct regmap *regmap,
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data->regmap = regmap;
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data->dev = dev;
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data->op_mode = ADXL355_STANDBY;
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data->chip_info = chip_info;
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mutex_init(&data->lock);
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indio_dev->name = name;
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indio_dev->name = chip_info->name;
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indio_dev->info = &adxl355_info;
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indio_dev->modes = INDIO_DIRECT_MODE;
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indio_dev->channels = adxl355_channels;
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@ -23,6 +23,20 @@ static const struct regmap_config adxl355_i2c_regmap_config = {
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static int adxl355_i2c_probe(struct i2c_client *client)
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{
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struct regmap *regmap;
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const struct adxl355_chip_info *chip_data;
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const struct i2c_device_id *adxl355;
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chip_data = device_get_match_data(&client->dev);
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if (!chip_data) {
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adxl355 = to_i2c_driver(client->dev.driver)->id_table;
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if (!adxl355)
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return -EINVAL;
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chip_data = (void *)i2c_match_id(adxl355, client)->driver_data;
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if (!chip_data)
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return -EINVAL;
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}
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regmap = devm_regmap_init_i2c(client, &adxl355_i2c_regmap_config);
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if (IS_ERR(regmap)) {
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@ -32,17 +46,19 @@ static int adxl355_i2c_probe(struct i2c_client *client)
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return PTR_ERR(regmap);
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}
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return adxl355_core_probe(&client->dev, regmap, client->name);
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return adxl355_core_probe(&client->dev, regmap, chip_data);
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}
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static const struct i2c_device_id adxl355_i2c_id[] = {
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{ "adxl355", 0 },
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{ "adxl355", (kernel_ulong_t)&adxl35x_chip_info[ADXL355] },
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{ "adxl359", (kernel_ulong_t)&adxl35x_chip_info[ADXL359] },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, adxl355_i2c_id);
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static const struct of_device_id adxl355_of_match[] = {
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{ .compatible = "adi,adxl355" },
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{ .compatible = "adi,adxl355", .data = &adxl35x_chip_info[ADXL355] },
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{ .compatible = "adi,adxl359", .data = &adxl35x_chip_info[ADXL359] },
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{ }
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};
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MODULE_DEVICE_TABLE(of, adxl355_of_match);
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@ -9,6 +9,7 @@
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#include <linux/mod_devicetable.h>
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#include <linux/regmap.h>
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#include <linux/spi/spi.h>
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#include <linux/property.h>
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#include "adxl355.h"
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@ -24,9 +25,17 @@ static const struct regmap_config adxl355_spi_regmap_config = {
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static int adxl355_spi_probe(struct spi_device *spi)
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{
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const struct spi_device_id *id = spi_get_device_id(spi);
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const struct adxl355_chip_info *chip_data;
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struct regmap *regmap;
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chip_data = device_get_match_data(&spi->dev);
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if (!chip_data) {
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chip_data = (void *)spi_get_device_id(spi)->driver_data;
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if (!chip_data)
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return -EINVAL;
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}
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regmap = devm_regmap_init_spi(spi, &adxl355_spi_regmap_config);
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if (IS_ERR(regmap)) {
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dev_err(&spi->dev, "Error initializing spi regmap: %ld\n",
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@ -35,17 +44,19 @@ static int adxl355_spi_probe(struct spi_device *spi)
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return PTR_ERR(regmap);
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}
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return adxl355_core_probe(&spi->dev, regmap, id->name);
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return adxl355_core_probe(&spi->dev, regmap, chip_data);
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}
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static const struct spi_device_id adxl355_spi_id[] = {
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{ "adxl355", 0 },
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{ "adxl355", (kernel_ulong_t)&adxl35x_chip_info[ADXL355] },
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{ "adxl359", (kernel_ulong_t)&adxl35x_chip_info[ADXL359] },
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{ }
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};
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MODULE_DEVICE_TABLE(spi, adxl355_spi_id);
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static const struct of_device_id adxl355_of_match[] = {
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{ .compatible = "adi,adxl355" },
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{ .compatible = "adi,adxl355", .data = &adxl35x_chip_info[ADXL355] },
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{ .compatible = "adi,adxl359", .data = &adxl35x_chip_info[ADXL359] },
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{ }
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};
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MODULE_DEVICE_TABLE(of, adxl355_of_match);
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