linux-kernel - [PATCH] iio: adis16201: Correct accelerometer scale factor

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Message-ID: <20250419125413.679290-1-gshahrouzi@gmail.com>
Date: Sat, 19 Apr 2025 08:54:13 -0400
From: Gabriel Shahrouzi <gshahrouzi@...il.com>
To: himanshujha199640@...il.com,
	jic23@...nel.org,
	lars@...afoo.de,
	linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Michael.Hennerich@...log.com
Cc: gshahrouzi@...il.com,
	skhan@...uxfoundation.org,
	linux-kernel-mentees@...ts.linux.dev,
	stable@...r.kernel.org
Subject: [PATCH] iio: adis16201: Correct accelerometer scale factor

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@...r.kernel.org
Signed-off-by: Gabriel Shahrouzi <gshahrouzi@...il.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;
-- 
2.43.0