diff options
Diffstat (limited to 'drivers/iio/accel/bmc150-accel-core.c')
| -rw-r--r-- | drivers/iio/accel/bmc150-accel-core.c | 46 |
1 files changed, 24 insertions, 22 deletions
diff --git a/drivers/iio/accel/bmc150-accel-core.c b/drivers/iio/accel/bmc150-accel-core.c index 43aecd4bf3a4..5ce384ebe6c7 100644 --- a/drivers/iio/accel/bmc150-accel-core.c +++ b/drivers/iio/accel/bmc150-accel-core.c @@ -1088,19 +1088,21 @@ static const struct iio_chan_spec bmc150_accel_channels[] = static const struct iio_chan_spec bma280_accel_channels[] = BMC150_ACCEL_CHANNELS(14); +/* + * The range for the Bosch sensors is typically +-2g/4g/8g/16g, distributed + * over the amount of bits (see above). The scale table can be calculated using + * (range / 2^bits) * g = (range / 2^bits) * 9.80665 m/s^2 + * e.g. for +-2g and 12 bits: (4 / 2^12) * 9.80665 m/s^2 = 0.0095768... m/s^2 + * Multiply 10^6 and round to get the values listed below. + */ static const struct bmc150_accel_chip_info bmc150_accel_chip_info_tbl[] = { { .name = "BMA222", .chip_id = 0x03, .channels = bma222e_accel_channels, .num_channels = ARRAY_SIZE(bma222e_accel_channels), - /* - * The datasheet page 17 says: - * 15.6, 31.3, 62.5 and 125 mg per LSB. - * IIO unit is m/s^2 so multiply by g = 9.80665 m/s^2. - */ - .scale_table = { {152984, BMC150_ACCEL_DEF_RANGE_2G}, - {306948, BMC150_ACCEL_DEF_RANGE_4G}, + .scale_table = { {153229, BMC150_ACCEL_DEF_RANGE_2G}, + {306458, BMC150_ACCEL_DEF_RANGE_4G}, {612916, BMC150_ACCEL_DEF_RANGE_8G}, {1225831, BMC150_ACCEL_DEF_RANGE_16G} }, }, @@ -1109,9 +1111,9 @@ static const struct bmc150_accel_chip_info bmc150_accel_chip_info_tbl[] = { .chip_id = 0xF8, .channels = bma222e_accel_channels, .num_channels = ARRAY_SIZE(bma222e_accel_channels), - .scale_table = { {153277, BMC150_ACCEL_DEF_RANGE_2G}, - {306457, BMC150_ACCEL_DEF_RANGE_4G}, - {612915, BMC150_ACCEL_DEF_RANGE_8G}, + .scale_table = { {153229, BMC150_ACCEL_DEF_RANGE_2G}, + {306458, BMC150_ACCEL_DEF_RANGE_4G}, + {612916, BMC150_ACCEL_DEF_RANGE_8G}, {1225831, BMC150_ACCEL_DEF_RANGE_16G} }, }, { @@ -1119,30 +1121,30 @@ static const struct bmc150_accel_chip_info bmc150_accel_chip_info_tbl[] = { .chip_id = 0xF9, .channels = bma250e_accel_channels, .num_channels = ARRAY_SIZE(bma250e_accel_channels), - .scale_table = { {38344, BMC150_ACCEL_DEF_RANGE_2G}, - {76590, BMC150_ACCEL_DEF_RANGE_4G}, - {153277, BMC150_ACCEL_DEF_RANGE_8G}, - {306457, BMC150_ACCEL_DEF_RANGE_16G} }, + .scale_table = { {38307, BMC150_ACCEL_DEF_RANGE_2G}, + {76614, BMC150_ACCEL_DEF_RANGE_4G}, + {153229, BMC150_ACCEL_DEF_RANGE_8G}, + {306458, BMC150_ACCEL_DEF_RANGE_16G} }, }, { .name = "BMA253/BMA254/BMA255/BMC150/BMI055", .chip_id = 0xFA, .channels = bmc150_accel_channels, .num_channels = ARRAY_SIZE(bmc150_accel_channels), - .scale_table = { {9610, BMC150_ACCEL_DEF_RANGE_2G}, - {19122, BMC150_ACCEL_DEF_RANGE_4G}, - {38344, BMC150_ACCEL_DEF_RANGE_8G}, - {76590, BMC150_ACCEL_DEF_RANGE_16G} }, + .scale_table = { {9577, BMC150_ACCEL_DEF_RANGE_2G}, + {19154, BMC150_ACCEL_DEF_RANGE_4G}, + {38307, BMC150_ACCEL_DEF_RANGE_8G}, + {76614, BMC150_ACCEL_DEF_RANGE_16G} }, }, { .name = "BMA280", .chip_id = 0xFB, .channels = bma280_accel_channels, .num_channels = ARRAY_SIZE(bma280_accel_channels), - .scale_table = { {2392, BMC150_ACCEL_DEF_RANGE_2G}, - {4785, BMC150_ACCEL_DEF_RANGE_4G}, - {9581, BMC150_ACCEL_DEF_RANGE_8G}, - {19152, BMC150_ACCEL_DEF_RANGE_16G} }, + .scale_table = { {2394, BMC150_ACCEL_DEF_RANGE_2G}, + {4788, BMC150_ACCEL_DEF_RANGE_4G}, + {9577, BMC150_ACCEL_DEF_RANGE_8G}, + {19154, BMC150_ACCEL_DEF_RANGE_16G} }, }, }; |