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Date:	Sat, 31 May 2014 11:20:32 +0100
From:	Jonathan Cameron <jic23@...nel.org>
To:	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	Reyad Attiyat <reyad.attiyat@...il.com>
CC:	linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org
Subject: Re: [PATCH] IIO: Added iio magn_north ABI documentation

On 27/05/14 16:27, Srinivas Pandruvada wrote:
> On 05/26/2014 08:20 PM, Reyad Attiyat wrote:
>> Added documentation for HID magnometer true/magnetic north sensor.
>> ---
>>   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..3305fe8 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
>> +What:        /sys/bus/iio/devices/iio:deviceX/in_magn_north_magnetic_raw
>> +What:        /sys/bus/iio/devices/iio:deviceX/in_magn_north_true_raw
>> +What:        /sys/bus/iio/devices/iio:deviceX/in_magn_north_magnetic_tilt_compensated_raw
>> +What:        /sys/bus/iio/devices/iio:deviceX/in_magn_north_true_tilt_compensated_raw
> These names are very long. May be we remove work "magnetic" as there attributes only apply to magnetometer.
Not necessarily true - could be a gps bearing.  I'd actually argue that these are rotation measures and userspace doesn't
care where they come from.  See other thread for my suggestions on that.  Also, I'd much rather have  along
and clear name for the attribute than the possibility of any confusion.  Hence I've just asked Reyad to
put the magnetic back in the first one ;) (in other thread).  Sorry for the slow response
been travelling and working nights for the last week...

We might even want to introduce a 'bearing' base type.  Whilst these are rotations they are referenced
to a very particular location.
>>   KernelVersion:    2.6.35
>>   Contact:    linux-iio@...r.kernel.org
>>   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_magnetic_scale
>> +What:        /sys/bus/iio/devices/iio:deviceX/in_magn_north_true_scale
>> +What:        /sys/bus/iio/devices/iio:deviceX/in_magn_north_magnetic_tilt_compensated_scale
>> +What:        /sys/bus/iio/devices/iio:deviceX/in_magn_north_true_tilt_compensated_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_magnetic_thresh_rising_en
>> +What:        /sys/.../iio:deviceX/events/in_magn_north_magnetic_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_magnetic_tilt_compensated_thresh_rising_en
>> +What:        /sys/.../iio:deviceX/events/in_magn_north_magnetic_tilt_compensated_thresh_falling_en
>> +What:        /sys/.../iio:deviceX/events/in_magn_north_true_tilt_compensated_thresh_rising_en
>> +What:        /sys/.../iio:deviceX/events/in_magn_north_true_tilt_compensated_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_magnetic_roc_rising_en
>> +What:        /sys/.../iio:deviceX/events/in_magn_north_magnetic_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_magnetic_tilt_compensated_roc_rising_en
>> +What:        /sys/.../iio:deviceX/events/in_magn_north_magnetic_tilt_compensated_roc_falling_en
>> +What:        /sys/.../iio:deviceX/events/in_magn_north_true_tilt_compensated_roc_rising_en
>> +What:        /sys/.../iio:deviceX/events/in_magn_north_true_tilt_compensated_roc_falling_en
> Same as above. Names are very long.
>
> Thanks,
> Srinivas
>>   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_magnetic_raw_thresh_rising_value
>> +What:        /sys/.../events/in_magn_north_magnetic_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_magnetic_tilt_compensated_raw_thresh_rising_value
>> +What:        /sys/.../events/in_magn_north_magnetic_tilt_compensated_raw_thresh_falling_value
>> +What:        /sys/.../events/in_magn_north_true_tilt_compensated_raw_thresh_rising_value
>> +What:        /sys/.../events/in_magn_north_true_tilt_compensated_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_magnetic_thresh_rising_hysteresis
>> +What:        /sys/.../events/in_magn_north_magnetic_thresh_falling_hysteresis
>> +What:        /sys/.../events/in_magn_north_magnetic_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_magnetic_tilt_compensated_thresh_rising_hysteresis
>> +What:        /sys/.../events/in_magn_north_magnetic_tilt_compensated_thresh_falling_hysteresis
>> +What:        /sys/.../events/in_magn_north_magnetic_tilt_compensated_thresh_either_hysteresis
>> +What:        /sys/.../events/in_magn_north_true_tilt_compensated_thresh_rising_hysteresis
>> +What:        /sys/.../events/in_magn_north_true_tilt_compensated_thresh_falling_hysteresis
>> +What:        /sys/.../events/in_magn_north_true_tilt_compensated_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_magnetic_raw_roc_rising_value
>> +What:        /sys/.../events/in_magn_north_magnetic_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_magnetic_tilt_compensated_raw_roc_rising_value
>> +What:        /sys/.../events/in_magn_north_magnetic_tilt_compensated_raw_roc_falling_value
>> +What:        /sys/.../events/in_magn_north_true_tilt_compensated_raw_roc_rising_value
>> +What:        /sys/.../events/in_magn_north_true_tilt_compensated_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_magnetic_thresh_rising_period
>> +What:        /sys/.../events/in_magn_north_magnetic_thresh_falling_period
>> +What:        /sys/.../events/in_magn_north_magnetic_roc_rising_period
>> +What:        /sys/.../events/in_magn_north_magnetic_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_magnetic_tilt_compensated_thresh_rising_period
>> +What:        /sys/.../events/in_magn_north_magnetic_tilt_compensated_thresh_falling_period
>> +What:        /sys/.../events/in_magn_north_magnetic_tilt_compensated_roc_rising_period
>> +What:        /sys/.../events/in_magn_north_magnetic_tilt_compensated_roc_falling_period
>> +What:        /sys/.../events/in_magn_north_true_tilt_compensated_thresh_rising_period
>> +What:        /sys/.../events/in_magn_north_true_tilt_compensated_thresh_falling_period
>> +What:        /sys/.../events/in_magn_north_true_tilt_compensated_roc_rising_period
>> +What:        /sys/.../events/in_magn_north_true_tilt_compensated_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_magnetic_en
>> +What:        /sys/.../iio:deviceX/scan_elements/in_magn_north_true_en
>> +What:        /sys/.../iio:deviceX/scan_elements/in_magn_north_magnetic_tilt_compensated_en
>> +What:        /sys/.../iio:deviceX/scan_elements/in_magn_north_true_tilt_compensated_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_magnetic_index
>> +What:        /sys/.../iio:deviceX/scan_elements/in_magn_north_true_index
>> +What:        /sys/.../iio:deviceX/scan_elements/in_magn_north_magnetic_tilt_compensated_index
>> +What:        /sys/.../iio:deviceX/scan_elements/in_magn_north_true_tilt_compensated_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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