[3.13.y.z extended stable] Patch "iio:bma180: Fix scale factors to report correct acceleration units" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

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

to the linux-3.13.y-queue branch of the 3.13.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.13.y-queue

This patch is scheduled to be released in version 3.13.11.6.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.13.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From c3c5c254be5650e5dade23d317e04c2389f7110f Mon Sep 17 00:00:00 2001
From: Peter Meerwald <pmeerw at pmeerw.net>
Date: Wed, 16 Jul 2014 19:32:00 +0100
Subject: 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 at pmeerw.net>
Cc: Oleksandr Kravchenko <o.v.kravchenko at globallogic.com>
Signed-off-by: Jonathan Cameron <jic23 at kernel.org>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/iio/accel/bma180.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/iio/accel/bma180.c b/drivers/iio/accel/bma180.c
index 28b3928..8d5ea9b 100644
--- 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)
 {
--
1.9.1