iio:bma180: Fix scale factors to report correct acceleration units

commit 381676d5e86596b11e22a62f196e192df6091373 upstream.

The userspace interface for acceleration sensors is documented as using
m/s^2 units [Documentation/ABI/testing/sysfs-bus-iio]

The fullscale raw values for the BMA80 corresponds to -/+ 1, 1.5, 2, etc G
depending on the selected mode.

The scale table was converting to G rather than m/s^2.
Change the scaling table to match the documented interface.

See commit 71702e6e, iio: mma8452: Use correct acceleration units,
for a related fix.

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Cc: Oleksandr Kravchenko <o.v.kravchenko@globallogic.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/iio/accel/bma180.c b/drivers/iio/accel/bma180.c
index bfec313..ecea3ad 100644 (file)
--- a/drivers/iio/accel/bma180.c
+++ b/drivers/iio/accel/bma180.c
@@ -68,13 +68,13 @@
 /* Defaults values */
 #define BMA180_DEF_PMODE       0
 #define BMA180_DEF_BW          20
-#define BMA180_DEF_SCALE       250
+#define BMA180_DEF_SCALE       2452
 
 /* Available values for sysfs */
 #define BMA180_FLP_FREQ_AVAILABLE \
        "10 20 40 75 150 300"
 #define BMA180_SCALE_AVAILABLE \
-       "0.000130 0.000190 0.000250 0.000380 0.000500 0.000990 0.001980"
+       "0.001275 0.001863 0.002452 0.003727 0.004903 0.009709 0.019417"
 
 struct bma180_data {
        struct i2c_client *client;
@@ -94,7 +94,7 @@ enum bma180_axis {
 };
 
 static int bw_table[] = { 10, 20, 40, 75, 150, 300 }; /* Hz */
-static int scale_table[] = { 130, 190, 250, 380, 500, 990, 1980 };
+static int scale_table[] = { 1275, 1863, 2452, 3727, 4903, 9709, 19417 };
 
 static int bma180_get_acc_reg(struct bma180_data *data, enum bma180_axis axis)
 {