staging:iio: Fix adis16240 channel offsets and scales

Most of the channel offsets and scales in the adis16240 are incorrect:
    * Temperature scale is of by a factor of 1000
    * Voltage scale is of by a factor of 1000
    * Temperature offset is completely wrong
	* Peak scale is completely wrong

This patch fixes these issues. Also use the IIO_G_TO_M_S_2 macro for the
acceleration scale since this makes it much easier to compare it to the value
given in the datasheet.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 12 insertions, 11 deletions

diff --git a/drivers/staging/iio/accel/adis16240_core.c b/drivers/staging/iio/accel/adis16240_core.c
index 0fc26a49d681..35e093973d5c 100644
--- a/drivers/staging/iio/accel/adis16240_core.c
+++ b/drivers/staging/iio/accel/adis16240_core.c
@@ -373,30 +373,31 @@ static int adis16240_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 = 4880;
-                        else
+                        if (chan->channel == 0) {
+                                *val = 4;
+                                *val2 = 880000; /* 4.88 mV */
+                                return IIO_VAL_INT_PLUS_MICRO;
+                        } else {
                                 return -EINVAL;
-                        return IIO_VAL_INT_PLUS_MICRO;
+                        }
                 case IIO_TEMP:
-                        *val = 0;
-                        *val2 = 244000;
+                        *val = 244; /* 0.244 C */
+                        *val2 = 0;
                         return IIO_VAL_INT_PLUS_MICRO;
                 case IIO_ACCEL:
                         *val = 0;
-                        *val2 = 504062;
+                        *val2 = IIO_G_TO_M_S_2(51400); /* 51.4 mg */
                         return IIO_VAL_INT_PLUS_MICRO;
                 default:
                         return -EINVAL;
                 }
                 break;
         case IIO_CHAN_INFO_PEAK_SCALE:
-                *val = 6;
-                *val2 = 629295;
+                *val = 0;
+                *val2 = IIO_G_TO_M_S_2(51400); /* 51.4 mg */
                 return IIO_VAL_INT_PLUS_MICRO;
         case IIO_CHAN_INFO_OFFSET:
-                *val = 25;
+                *val = 25000 / 244 - 0x133; /* 25 C = 0x133 */
                 return IIO_VAL_INT;
         case IIO_CHAN_INFO_CALIBBIAS:
                 bits = 10;