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Subject[PATCH 3/8] iio: core: Introduce SPEED channel type
Date
Some devices export the current speed value of the user.

One of this devices is Freescale's MMA9553L
(http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf)
that computes the speed of the user based on the number of steps and
stride length.

Introduce a new channel type SPEED to export these values.

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
---
Documentation/ABI/testing/sysfs-bus-iio | 9 +++++++++
drivers/iio/industrialio-core.c | 1 +
include/linux/iio/types.h | 1 +
3 files changed, 11 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index a5c1dcc..07acef7 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -295,6 +295,7 @@ What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_tilt_comp_scale
What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_scale
What: /sys/bus/iio/devices/iio:deviceX/in_pressure_scale
What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_scale
+What: /sys/bus/iio/devices/iio:deviceX/in_speed_scale
KernelVersion: 2.6.35
Contact: linux-iio@vger.kernel.org
Description:
@@ -1146,6 +1147,14 @@ Description:
present, output should be considered as processed with the
unit in milliamps.

+What: /sys/.../iio:deviceX/in_speed_input
+What: /sys/.../iio:deviceX/in_speed_raw
+KernelVersion: 3.19
+Contact: linux-iio@vger.kernel.org
+Description:
+ This attribute is used to read the current speed value of the user.
+ Units after application of scale are m/s.
+
What: /sys/.../iio:deviceX/in_steps_en
KernelVersion: 3.19
Contact: linux-iio@vger.kernel.org
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 4a10d31..5e50aca 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -74,6 +74,7 @@ static const char * const iio_chan_type_name_spec[] = {
[IIO_STEPS] = "steps",
[IIO_CALORIES] = "calories",
[IIO_DISTANCE] = "distance",
+ [IIO_SPEED] = "speed",
};

static const char * const iio_modifier_names[] = {
diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index b98f751..c848f45 100644
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -34,6 +34,7 @@ enum iio_chan_type {
IIO_STEPS,
IIO_CALORIES,
IIO_DISTANCE,
+ IIO_SPEED,
};

enum iio_modifier {
--
1.7.9.5


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