staging:iio: Fix adis16209 channel offsets and scales

Most of the channel offsets and scales in the adis16209 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
	* Rotational position scale is missing

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 with the value
given in the datasheet.

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

diff --git a/drivers/staging/iio/accel/adis16209_core.c b/drivers/staging/iio/accel/adis16209_core.c
index b7333bfe0b2f1312a51548a731e73f2f41bd36ba..7ee974b45d7d3a3eb354ef073a1094c9183f26c3 100644 (file)
--- a/drivers/staging/iio/accel/adis16209_core.c
+++ b/drivers/staging/iio/accel/adis16209_core.c
@@ -343,28 +343,29 @@ static int adis16209_read_raw(struct iio_dev *indio_dev,
                case IIO_VOLTAGE:
                        *val = 0;
                        if (chan->channel == 0)
-                               *val2 = 305180;
+                               *val2 = 305180; /* 0.30518 mV */
                        else
-                               *val2 = 610500;
+                               *val2 = 610500; /* 0.6105 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;
-                       *val2 = 2394;
-                       return IIO_VAL_INT_PLUS_MICRO;
+                       *val2 = IIO_G_TO_M_S_2(244140); /* 0.244140 mg */
+                       return IIO_VAL_INT_PLUS_NANO;
                case IIO_INCLI:
+               case IIO_ROT:
                        *val = 0;
-                       *val2 = 436;
+                       *val2 = 25000; /* 0.025 degree */
                        return IIO_VAL_INT_PLUS_MICRO;
                default:
                        return -EINVAL;
                }
                break;
        case IIO_CHAN_INFO_OFFSET:
-               *val = 25;
+               *val = 25000 / -470 - 0x4FE; /* 25 C = 0x4FE */
                return IIO_VAL_INT;
        case IIO_CHAN_INFO_CALIBBIAS:
                switch (chan->type) {
@@ -491,6 +492,7 @@ static const struct iio_chan_spec adis16209_channels[] = {
                .modified = 1,
                .channel2 = IIO_MOD_X,
                .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
+               IIO_CHAN_INFO_SCALE_SHARED_BIT,
                .address = rot,
                .scan_index = ADIS16209_SCAN_ROT,
                .scan_type = {