This is a note to let you know that I've just added the patch titled
iio:bma180: Fix scale factors to report correct acceleration units
to the 3.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iio-bma180-fix-scale-factors-to-report-correct-acceleration-units.patch
and it can be found in the queue-3.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 381676d5e86596b11e22a62f196e192df6091373 Mon Sep 17 00:00:00 2001
From: Peter Meerwald <pmeerw@xxxxxxxxxx>
Date: Wed, 16 Jul 2014 19:32:00 +0100
Subject: iio:bma180: Fix scale factors to report correct acceleration units
From: Peter Meerwald <pmeerw@xxxxxxxxxx>
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@xxxxxxxxxx>
Cc: Oleksandr Kravchenko <o.v.kravchenko@xxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iio/accel/bma180.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- 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)
{
Patches currently in stable-queue which might be from pmeerw@xxxxxxxxxx are
queue-3.15/iio-bma180-missing-check-for-frequency-fractional-part.patch
queue-3.15/iio-bma180-fix-scale-factors-to-report-correct-acceleration-units.patch
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