From 9cc19b81d7363f630593ad7ceab9fa12a105fc25 Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Mon, 15 Oct 2012 10:35:00 +0100
Subject: [PATCH] staging:iio: Fix adis16204 channel offsets and scales
Most of the channel offsets and scales in the adis16204 are incorrect:
* Temperature scale is off by a factor of 1000
* Voltage scale is off by a factor of 1000
* Acceleration is scale is in g instead of m/(s**2)
* Temperature offset is completely wrong
This patch fixes these issues.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
---
drivers/staging/iio/accel/adis16204_core.c | 22 ++++++++++++----------
1 file changed, 12 insertions(+), 10 deletions(-)
diff --git a/drivers/staging/iio/accel/adis16204_core.c b/drivers/staging/iio/accel/adis16204_core.c
index 05bdb7c2c8e3..c6234c2f46aa 100644
--- a/drivers/staging/iio/accel/adis16204_core.c
+++ b/drivers/staging/iio/accel/adis16204_core.c
@@ -317,26 +317,28 @@ static int adis16204_read_raw(struct iio_dev *indio_dev,
case IIO_CHAN_INFO_SCALE:
switch (chan->type) {
case IIO_VOLTAGE:
- *val = 0;
- if (chan->channel == 0)
- *val2 = 1220;
- else
- *val2 = 610;
+ if (chan->channel == 0) {
+ *val = 1;
+ *val2 = 220000; /* 1.22 mV */
+ } else {
+ *val = 0;
+ *val2 = 610000; /* 0.61 mV */
+ }
return IIO_VAL_INT_PLUS_MICRO;
case IIO_TEMP:
- *val = 0;
- *val2 = -470000;
+ *val = -470; /* 0.47 C */
+ *val2 = 0;
return IIO_VAL_INT_PLUS_MICRO;
case IIO_ACCEL:
*val = 0;
switch (chan->channel2) {
case IIO_MOD_X:
case IIO_MOD_ROOT_SUM_SQUARED_X_Y:
- *val2 = 17125;
+ *val2 = IIO_G_TO_M_S_2(17125); /* 17.125 mg */
break;
case IIO_MOD_Y:
case IIO_MOD_Z:
- *val2 = 8407;
+ *val2 = IIO_G_TO_M_S_2(8407); /* 8.407 mg */
break;
}
return IIO_VAL_INT_PLUS_MICRO;
@@ -345,7 +347,7 @@ static int adis16204_read_raw(struct iio_dev *indio_dev,
}
break;
case IIO_CHAN_INFO_OFFSET:
- *val = 25;
+ *val = 25000 / -470 - 1278; /* 25 C = 1278 */
return IIO_VAL_INT;
case IIO_CHAN_INFO_CALIBBIAS:
case IIO_CHAN_INFO_PEAK:
--
2.34.1