Re: [PATCH 1/3] IIO: Add iio magn_north ABI documentation

From: Srinivas Pandruvada
Date: Mon Jun 02 2014 - 11:50:55 EST

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On 05/29/2014 09:46 AM, Jonathan Cameron wrote:

On 28/05/14 22:06, Reyad Attiyat wrote:

Update documentation for HID compass true/magnetic north sensor.

Signed-off-by: Reyad Attiyat <reyad.attiyat@xxxxxxxxx>
---
Documentation/ABI/testing/sysfs-bus-iio | 76 +++++++++++++++++++++++++++++++++
1 file changed, 76 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 6e02c50..0341b2f 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -165,6 +165,10 @@ Description:
What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_raw
What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_raw
What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_raw

Hmm. The question to my mind is whether people would expect a simple north to give
them which direction north is?
Also is it actually relevant whether they find north from a magnetometer or some other method?
I wonder if we want to make these some sort of north referenced rotation?
in_rot_from_true_north_raw
in_rot_from_magnetic_north_raw

Technically it is possible to get some direction information from some GPS receivers or to
to maintain a knowledge of its location with good gyroscopes.

Ultimately userspace doesn't care about it. When we were using the axial magnetic functions we
were measuring the field magnitude in that direction. As I understand it here it is just an angle?

Yes, they are angles. Default units are degrees, which we should convert to radians as a standard unit for IIO.
Thanks,
Srinivas

J

+What: /sys/bus/iio/devices/iio:deviceX/in_magn_north_raw
+What: /sys/bus/iio/devices/iio:deviceX/in_magn_north_true_raw
+What: /sys/bus/iio/devices/iio:deviceX/in_magn_north_tilt_comp_raw
+What: /sys/bus/iio/devices/iio:deviceX/in_magn_north_true_tilt_comp_raw
KernelVersion: 2.6.35
Contact: linux-iio@xxxxxxxxxxxxxxx
Description:
@@ -249,6 +253,10 @@ 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
What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_scale
+What: /sys/bus/iio/devices/iio:deviceX/in_magn_north_scale
+What: /sys/bus/iio/devices/iio:deviceX/in_magn_north_true_scale
+What: /sys/bus/iio/devices/iio:deviceX/in_magn_north_tilt_comp_scale
+What: /sys/bus/iio/devices/iio:deviceX/in_magn_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
KernelVersion: 2.6.35
@@ -436,6 +444,14 @@ What: /sys/.../iio:deviceX/events/in_magn_y_thresh_rising_en
What: /sys/.../iio:deviceX/events/in_magn_y_thresh_falling_en
What: /sys/.../iio:deviceX/events/in_magn_z_thresh_rising_en
What: /sys/.../iio:deviceX/events/in_magn_z_thresh_falling_en
+What: /sys/.../iio:deviceX/events/in_magn_north_thresh_rising_en
+What: /sys/.../iio:deviceX/events/in_magn_north_thresh_falling_en
+What: /sys/.../iio:deviceX/events/in_magn_north_true_thresh_rising_en
+What: /sys/.../iio:deviceX/events/in_magn_north_true_thresh_falling_en
+What: /sys/.../iio:deviceX/events/in_magn_north_tilt_comp_thresh_rising_en
+What: /sys/.../iio:deviceX/events/in_magn_north_tilt_comp_thresh_falling_en
+What: /sys/.../iio:deviceX/events/in_magn_north_true_tilt_comp_thresh_rising_en
+What: /sys/.../iio:deviceX/events/in_magn_north_true_tilt_comp_thresh_falling_en
What: /sys/.../iio:deviceX/events/in_voltageY_supply_thresh_rising_en
What: /sys/.../iio:deviceX/events/in_voltageY_supply_thresh_falling_en
What: /sys/.../iio:deviceX/events/in_voltageY_thresh_rising_en
@@ -481,6 +497,14 @@ What: /sys/.../iio:deviceX/events/in_magn_y_roc_rising_en
What: /sys/.../iio:deviceX/events/in_magn_y_roc_falling_en
What: /sys/.../iio:deviceX/events/in_magn_z_roc_rising_en
What: /sys/.../iio:deviceX/events/in_magn_z_roc_falling_en
+What: /sys/.../iio:deviceX/events/in_magn_north_roc_rising_en
+What: /sys/.../iio:deviceX/events/in_magn_north_roc_falling_en
+What: /sys/.../iio:deviceX/events/in_magn_north_true_roc_rising_en
+What: /sys/.../iio:deviceX/events/in_magn_north_true_roc_falling_en
+What: /sys/.../iio:deviceX/events/in_magn_north_tilt_comp_roc_rising_en
+What: /sys/.../iio:deviceX/events/in_magn_north_tilt_comp_roc_falling_en
+What: /sys/.../iio:deviceX/events/in_magn_north_true_tilt_comp_roc_rising_en
+What: /sys/.../iio:deviceX/events/in_magn_north_true_tilt_comp_roc_falling_en
What: /sys/.../iio:deviceX/events/in_voltageY_supply_roc_rising_en
What: /sys/.../iio:deviceX/events/in_voltageY_supply_roc_falling_en
What: /sys/.../iio:deviceX/events/in_voltageY_roc_rising_en
@@ -527,6 +551,14 @@ What: /sys/.../events/in_magn_y_raw_thresh_rising_value
What: /sys/.../events/in_magn_y_raw_thresh_falling_value
What: /sys/.../events/in_magn_z_raw_thresh_rising_value
What: /sys/.../events/in_magn_z_raw_thresh_falling_value
+What: /sys/.../events/in_magn_north_raw_thresh_rising_value
+What: /sys/.../events/in_magn_north_raw_thresh_falling_value
+What: /sys/.../events/in_magn_north_true_raw_thresh_rising_value
+What: /sys/.../events/in_magn_north_true_raw_thresh_falling_value
+What: /sys/.../events/in_magn_north_tilt_comp_raw_thresh_rising_value
+What: /sys/.../events/in_magn_north_tilt_comp_raw_thresh_falling_value
+What: /sys/.../events/in_magn_north_true_tilt_comp_raw_thresh_rising_value
+What: /sys/.../events/in_magn_north_true_tilt_comp_raw_thresh_falling_value
What: /sys/.../events/in_voltageY_supply_raw_thresh_rising_value
What: /sys/.../events/in_voltageY_supply_raw_thresh_falling_value
What: /sys/.../events/in_voltageY_raw_thresh_rising_value
@@ -577,6 +609,18 @@ What: /sys/.../events/in_magn_y_thresh_either_hysteresis
What: /sys/.../events/in_magn_z_thresh_rising_hysteresis
What: /sys/.../events/in_magn_z_thresh_falling_hysteresis
What: /sys/.../events/in_magn_z_thresh_either_hysteresis
+What: /sys/.../events/in_magn_north_thresh_rising_hysteresis
+What: /sys/.../events/in_magn_north_thresh_falling_hysteresis
+What: /sys/.../events/in_magn_north_thresh_either_hysteresis
+What: /sys/.../events/in_magn_north_true_thresh_rising_hysteresis
+What: /sys/.../events/in_magn_north_true_thresh_falling_hysteresis
+What: /sys/.../events/in_magn_north_true_thresh_either_hysteresis
+What: /sys/.../events/in_magn_north_tilt_comp_thresh_rising_hysteresis
+What: /sys/.../events/in_magn_north_tilt_comp_thresh_falling_hysteresis
+What: /sys/.../events/in_magn_north_tilt_comp_thresh_either_hysteresis
+What: /sys/.../events/in_magn_north_true_tilt_comp_thresh_rising_hysteresis
+What: /sys/.../events/in_magn_north_true_tilt_comp_thresh_falling_hysteresis
+What: /sys/.../events/in_magn_north_true_tilt_comp_thresh_either_hysteresis
What: /sys/.../events/in_voltageY_thresh_rising_hysteresis
What: /sys/.../events/in_voltageY_thresh_falling_hysteresis
What: /sys/.../events/in_voltageY_thresh_either_hysteresis
@@ -624,6 +668,14 @@ What: /sys/.../events/in_magn_y_raw_roc_rising_value
What: /sys/.../events/in_magn_y_raw_roc_falling_value
What: /sys/.../events/in_magn_z_raw_roc_rising_value
What: /sys/.../events/in_magn_z_raw_roc_falling_value
+What: /sys/.../events/in_magn_north_raw_roc_rising_value
+What: /sys/.../events/in_magn_north_raw_roc_falling_value
+What: /sys/.../events/in_magn_north_true_raw_roc_rising_value
+What: /sys/.../events/in_magn_north_true_raw_roc_falling_value
+What: /sys/.../events/in_magn_north_tilt_comp_raw_roc_rising_value
+What: /sys/.../events/in_magn_north_tilt_comp_raw_roc_falling_value
+What: /sys/.../events/in_magn_north_true_tilt_comp_raw_roc_rising_value
+What: /sys/.../events/in_magn_north_true_tilt_comp_raw_roc_falling_value
What: /sys/.../events/in_voltageY_supply_raw_roc_rising_value
What: /sys/.../events/in_voltageY_supply_raw_roc_falling_value
What: /sys/.../events/in_voltageY_raw_roc_rising_value
@@ -679,6 +731,22 @@ What: /sys/.../events/in_magn_z_thresh_rising_period
What: /sys/.../events/in_magn_z_thresh_falling_period
What: /sys/.../events/in_magn_z_roc_rising_period
What: /sys/.../events/in_magn_z_roc_falling_period
+What: /sys/.../events/in_magn_north_thresh_rising_period
+What: /sys/.../events/in_magn_north_thresh_falling_period
+What: /sys/.../events/in_magn_north_roc_rising_period
+What: /sys/.../events/in_magn_north_roc_falling_period
+What: /sys/.../events/in_magn_north_true_thresh_rising_period
+What: /sys/.../events/in_magn_north_true_thresh_falling_period
+What: /sys/.../events/in_magn_north_true_roc_rising_period
+What: /sys/.../events/in_magn_north_true_roc_falling_period
+What: /sys/.../events/in_magn_north_tilt_comp_thresh_rising_period
+What: /sys/.../events/in_magn_north_tilt_comp_thresh_falling_period
+What: /sys/.../events/in_magn_north_tilt_comp_roc_rising_period
+What: /sys/.../events/in_magn_north_tilt_comp_roc_falling_period
+What: /sys/.../events/in_magn_north_true_tilt_comp_thresh_rising_period
+What: /sys/.../events/in_magn_north_true_tilt_comp_thresh_falling_period
+What: /sys/.../events/in_magn_north_true_tilt_comp_roc_rising_period
+What: /sys/.../events/in_magn_north_true_tilt_comp_roc_falling_period
What: /sys/.../events/in_voltageY_supply_thresh_rising_period
What: /sys/.../events/in_voltageY_supply_thresh_falling_period
What: /sys/.../events/in_voltageY_supply_roc_rising_period
@@ -776,6 +844,10 @@ What: /sys/.../iio:deviceX/scan_elements/in_anglvel_z_en
What: /sys/.../iio:deviceX/scan_elements/in_magn_x_en
What: /sys/.../iio:deviceX/scan_elements/in_magn_y_en
What: /sys/.../iio:deviceX/scan_elements/in_magn_z_en
+What: /sys/.../iio:deviceX/scan_elements/in_magn_north_en
+What: /sys/.../iio:deviceX/scan_elements/in_magn_north_true_en
+What: /sys/.../iio:deviceX/scan_elements/in_magn_north_tilt_comp_en
+What: /sys/.../iio:deviceX/scan_elements/in_magn_north_true_tilt_comp_en
What: /sys/.../iio:deviceX/scan_elements/in_timestamp_en
What: /sys/.../iio:deviceX/scan_elements/in_voltageY_supply_en
What: /sys/.../iio:deviceX/scan_elements/in_voltageY_en
@@ -840,6 +912,10 @@ What: /sys/.../iio:deviceX/scan_elements/in_anglvel_z_index
What: /sys/.../iio:deviceX/scan_elements/in_magn_x_index
What: /sys/.../iio:deviceX/scan_elements/in_magn_y_index
What: /sys/.../iio:deviceX/scan_elements/in_magn_z_index
+What: /sys/.../iio:deviceX/scan_elements/in_magn_north_index
+What: /sys/.../iio:deviceX/scan_elements/in_magn_north_true_index
+What: /sys/.../iio:deviceX/scan_elements/in_magn_north_tilt_comp_index
+What: /sys/.../iio:deviceX/scan_elements/in_magn_north_true_tilt_comp_index
What: /sys/.../iio:deviceX/scan_elements/in_incli_x_index
What: /sys/.../iio:deviceX/scan_elements/in_incli_y_index
What: /sys/.../iio:deviceX/scan_elements/in_timestamp_index

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