From cc3c9eecaed65b26ee0661e9e9491fd8d48e3907 Mon Sep 17 00:00:00 2001
From: Irina Tirdea <irina.tirdea@intel.com>
Date: Sun, 11 Jan 2015 21:10:08 +0200
Subject: [PATCH] iio: core: Introduce DISTANCE channel type
Some devices export an estimation of the distance the user has covered
since the last reset.
One of this devices is Freescale's MMA9553L
(http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf)
that computes the distance based on the stride length and step rate.
Introduce a new channel type DISTANCE to export these values.
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
---
Documentation/ABI/testing/sysfs-bus-iio | 10 ++++++++++
drivers/iio/industrialio-core.c | 1 +
include/linux/iio/types.h | 1 +
3 files changed, 12 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 33118862fb8bb..c627a9a1cd56b 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -283,6 +283,7 @@ What: /sys/bus/iio/devices/iio:deviceX/in_accel_scale
What: /sys/bus/iio/devices/iio:deviceX/in_accel_peak_scale
What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_scale
What: /sys/bus/iio/devices/iio:deviceX/in_energy_scale
+What: /sys/bus/iio/devices/iio:deviceX/in_distance_scale
What: /sys/bus/iio/devices/iio:deviceX/in_magn_scale
What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_scale
What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_scale
@@ -1059,6 +1060,15 @@ Description:
device (e.g.: human activity sensors report energy burnt by the
user). Units after application of scale are Joules.
+What: /sys/.../iio:deviceX/in_distance_input
+What: /sys/.../iio:deviceX/in_distance_raw
+KernelVersion: 3.20
+Contact: linux-iio@vger.kernel.org
+Description:
+ This attribute is used to read the distance covered by the user
+ since the last reboot while activated. Units after application
+ of scale are meters.
+
What: /sys/bus/iio/devices/iio:deviceX/store_eeprom
KernelVersion: 3.4.0
Contact: linux-iio@vger.kernel.org
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 8d2c9ba85fd72..655755b49ccdd 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -73,6 +73,7 @@ static const char * const iio_chan_type_name_spec[] = {
[IIO_ACTIVITY] = "activity",
[IIO_STEPS] = "steps",
[IIO_ENERGY] = "energy",
+ [IIO_DISTANCE] = "distance",
};
static const char * const iio_modifier_names[] = {
diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index 26b8a1c5e2af1..a7de445222f42 100644
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -33,6 +33,7 @@ enum iio_chan_type {
IIO_ACTIVITY,
IIO_STEPS,
IIO_ENERGY,
+ IIO_DISTANCE,
};
enum iio_modifier {
--
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