staging:iio: Fix adis16220 channel offsets and scales

Most of the channel offsets and scales in the adis16220 are incorrect:
	* Temperature scale is off by a factor of 1000
	* Voltage scale is off by a factor of 1000
	* Acceleration seems to have a typo "187042" since it should be instead of
	  "1887042"
	* 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>

diff --git a/drivers/staging/iio/accel/adis16220_core.c b/drivers/staging/iio/accel/adis16220_core.c
index c755089..eaadd9d 100644 (file)
--- a/drivers/staging/iio/accel/adis16220_core.c
+++ b/drivers/staging/iio/accel/adis16220_core.c
@@ -486,7 +486,7 @@ static int adis16220_read_raw(struct iio_dev *indio_dev,
                break;
        case IIO_CHAN_INFO_OFFSET:
                if (chan->type == IIO_TEMP) {
-                       *val = 25;
+                       *val = 25000 / -470 - 1278; /* 25 C = 1278 */
                        return IIO_VAL_INT;
                }
                addrind = 1;
@@ -495,19 +495,22 @@ static int adis16220_read_raw(struct iio_dev *indio_dev,
                addrind = 2;
                break;
        case IIO_CHAN_INFO_SCALE:
-               *val = 0;
                switch (chan->type) {
                case IIO_TEMP:
-                       *val2 = -470000;
+                       *val = -470; /* -0.47 C */
+                       *val2 = 0;
                        return IIO_VAL_INT_PLUS_MICRO;
                case IIO_ACCEL:
-                       *val2 = 1887042;
+                       *val2 = IIO_G_TO_M_S_2(19073); /* 19.073 g */
                        return IIO_VAL_INT_PLUS_MICRO;
                case IIO_VOLTAGE:
-                       if (chan->channel == 0)
-                               *val2 = 0012221;
-                       else /* Should really be dependent on VDD */
-                               *val2 = 305;
+                       if (chan->channel == 0) {
+                               *val = 1;
+                               *val2 = 220700; /* 1.2207 mV */
+                       } else {
+                               /* Should really be dependent on VDD */
+                               *val2 = 305180; /* 305.18 uV */
+                       }
                        return IIO_VAL_INT_PLUS_MICRO;
                default:
                        return -EINVAL;