The IIO_CHAN_INFO_SCALE previously reported for accelerometer channels used 0.4624 mg/LSB. This value matches the datasheet specification for the offset calibration registers (X/YACCL_OFFS_REG, pg 18).
However, the scale should reflect the sensor output data registers (X/YACCL_OUT, pg 15, Tables 7 & 8), which use 0.4625 mg/LSB. This is also consistent with the typical sensitivity in Table 1 (1 / 2.162 ≈ 0.4625).
Fixes: 57f9386405a2 ("Staging: iio: accel: adis16201: Add comments about units in read_raw()") Cc: stable@vger.kernel.org Signed-off-by: Gabriel Shahrouzi gshahrouzi@gmail.com --- drivers/iio/accel/adis16201.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iio/accel/adis16201.c b/drivers/iio/accel/adis16201.c index 8601b9a8b8e75..982b33f6eccac 100644 --- a/drivers/iio/accel/adis16201.c +++ b/drivers/iio/accel/adis16201.c @@ -133,7 +133,7 @@ static int adis16201_read_raw(struct iio_dev *indio_dev, * 1 LSB represents 0.244 mg. */ *val = 0; - *val2 = IIO_G_TO_M_S_2(462400); + *val2 = IIO_G_TO_M_S_2(462500); return IIO_VAL_INT_PLUS_NANO; case IIO_INCLI: *val = 0;
LGTM. Minor comments inline.
On 04/19, Gabriel Shahrouzi wrote:
The IIO_CHAN_INFO_SCALE previously reported for accelerometer channels used 0.4624 mg/LSB. This value matches the datasheet specification for the offset calibration registers (X/YACCL_OFFS_REG, pg 18).
However, the scale should reflect the sensor output data registers (X/YACCL_OUT, pg 15, Tables 7 & 8), which use 0.4625 mg/LSB. This is also consistent with the typical sensitivity in Table 1 (1 / 2.162 ≈ 0.4625).
Fixes: 57f9386405a2 ("Staging: iio: accel: adis16201: Add comments about units in read_raw()") Cc: stable@vger.kernel.org Signed-off-by: Gabriel Shahrouzi gshahrouzi@gmail.com
drivers/iio/accel/adis16201.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iio/accel/adis16201.c b/drivers/iio/accel/adis16201.c index 8601b9a8b8e75..982b33f6eccac 100644 --- a/drivers/iio/accel/adis16201.c +++ b/drivers/iio/accel/adis16201.c @@ -133,7 +133,7 @@ static int adis16201_read_raw(struct iio_dev *indio_dev, * 1 LSB represents 0.244 mg.
Maybe also update the comment?
*/ *val = 0;
*val2 = IIO_G_TO_M_S_2(462400);
*val2 = IIO_G_TO_M_S_2(462500);
If we do the math with more decimal digitis we have 1 / 2.162 == 0.46253469010176 Would it make sense to do *val2 = IIO_G_TO_M_S_2(462535); ?
return IIO_VAL_INT_PLUS_NANO; case IIO_INCLI: *val = 0;
On Sat, Apr 19, 2025 at 2:13 PM Marcelo Schmitt marcelo.schmitt1@gmail.com wrote:
LGTM. Minor comments inline.
On 04/19, Gabriel Shahrouzi wrote:
The IIO_CHAN_INFO_SCALE previously reported for accelerometer channels used 0.4624 mg/LSB. This value matches the datasheet specification for the offset calibration registers (X/YACCL_OFFS_REG, pg 18).
However, the scale should reflect the sensor output data registers (X/YACCL_OUT, pg 15, Tables 7 & 8), which use 0.4625 mg/LSB. This is also consistent with the typical sensitivity in Table 1 (1 / 2.162 ≈ 0.4625).
Fixes: 57f9386405a2 ("Staging: iio: accel: adis16201: Add comments about units in read_raw()") Cc: stable@vger.kernel.org Signed-off-by: Gabriel Shahrouzi gshahrouzi@gmail.com
drivers/iio/accel/adis16201.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iio/accel/adis16201.c b/drivers/iio/accel/adis16201.c index 8601b9a8b8e75..982b33f6eccac 100644 --- a/drivers/iio/accel/adis16201.c +++ b/drivers/iio/accel/adis16201.c @@ -133,7 +133,7 @@ static int adis16201_read_raw(struct iio_dev *indio_dev, * 1 LSB represents 0.244 mg.
Maybe also update the comment?
Good catch. I will update that for v2.
*/ *val = 0;
*val2 = IIO_G_TO_M_S_2(462400);
*val2 = IIO_G_TO_M_S_2(462500);If we do the math with more decimal digitis we have 1 / 2.162 == 0.46253469010176 Would it make sense to do *val2 = IIO_G_TO_M_S_2(462535); ?
Since the datasheet lists the scale factor as 0.4625 mg, I believe using *val2 = IIO_G_TO_M_S_2(462500); is correct. However, I'm not sure so I'll postpone v2.
return IIO_VAL_INT_PLUS_NANO; case IIO_INCLI: *val = 0;
linux-stable-mirror@lists.linaro.org
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Gabriel Shahrouzi -
Marcelo Schmitt