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Date: Fri, 11 Nov 2011 11:41:12 +0100 From: Michael Hennerich <michael.hennerich@...log.com> To: "jic23@....ac.uk" <jic23@....ac.uk> CC: "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "guenter.roeck@...csson.com" <guenter.roeck@...csson.com>, "khali@...ux-fr.org" <khali@...ux-fr.org>, "dmitry.torokhov@...il.com" <dmitry.torokhov@...il.com>, "broonie@...nsource.wolfsonmicro.com" <broonie@...nsource.wolfsonmicro.com>, "gregkh@...e.de" <gregkh@...e.de>, "alan@...rguk.ukuu.org.uk" <alan@...rguk.ukuu.org.uk>, "arnd@...db.de" <arnd@...db.de>, "linus.walleij@...aro.org" <linus.walleij@...aro.org>, "lars@...afoo.de" <lars@...afoo.de>, "maxime.ripard@...e-electrons.com" <maxime.ripard@...e-electrons.com> Subject: Re: [PATCH 6/6] IIO: ABI documetation. On 11/07/2011 03:52 PM, jic23@....ac.uk wrote: > From: Jonathan Cameron<jic23@....ac.uk> > > Elements lifted from staging documentation, > drivers/staging/iio/Documentation/sysfs-bus-iio > > Signed-off-by: Jonathan Cameron<jic23@....ac.uk> Acked-by: Michael Hennerich <michael.hennerich@...log.com> > --- > Documentation/ABI/testing/sysfs-bus-iio | 223 +++++++++++++++++++++++++++++++ > 1 files changed, 223 insertions(+), 0 deletions(-) > > diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio > new file mode 100644 > index 0000000..965c7cf > --- /dev/null > +++ b/Documentation/ABI/testing/sysfs-bus-iio > @@ -0,0 +1,223 @@ > +What: /sys/bus/iio/devices/iio:deviceX > +KernelVersion: 2.6.35 > +Contact: linux-iio@...r.kernel.org > +Description: > + Hardware chip or device accessed by one communication port. > + Corresponds to a grouping of sensor channels. X is the IIO > + index of the device. > + > +What: /sys/bus/iio/devices/iio:deviceX/name > +KernelVersion: 2.6.35 > +Contact: linux-iio@...r.kernel.org > +Description: > + Description of the physical chip / device for device X. > + Typically a part number. > + > +What: /sys/bus/iio/devices/iio:deviceX/sampling_frequency > +KernelVersion: 2.6.35 > +Contact: linux-iio@...r.kernel.org > +Description: > + Some devices have internal clocks. This parameter sets the > + resulting sampling frequency. > + > +What: /sys/bus/iio/devices/iio:deviceX/sampling_frequency_available > +KernelVersion: 2.6.35 > +Contact: linux-iio@...r.kernel.org > +Description: > + When the internal sampling clock can only take a small > + discrete set of values, this file lists those available. > + > +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_raw > +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_raw > +KernelVersion: 2.6.35 > +Contact: linux-iio@...r.kernel.org > +Description: > + Raw (unscaled no bias removal etc) voltage measurement from > + channel Y. In special cases where the channel does not > + correspond to externally available input one of the named > + versions may be used. The number must always be specified and > + unique to allow association with event codes. Units after > + application of scale and offset are microvolts. > + > +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY-voltageZ_raw > +KernelVersion: 2.6.35 > +Contact: linux-iio@...r.kernel.org > +Description: > + Raw (unscaled) differential voltage measurement equivalent to > + channel Y - channel Z where these channel numbers apply to the > + physically equivalent inputs when non differential readings are > + separately available. In differential only parts, then all that > + is required is a consistent labeling. Units after application > + of scale and offset are microvolts. > + > +What: /sys/bus/iio/devices/iio:deviceX/in_temp_raw > +What: /sys/bus/iio/devices/iio:deviceX/in_tempX_raw > +What: /sys/bus/iio/devices/iio:deviceX/in_temp_x_raw > +What: /sys/bus/iio/devices/iio:deviceX/in_temp_y_raw > +What: /sys/bus/iio/devices/iio:deviceX/in_temp_z_raw > +KernelVersion: 2.6.35 > +Contact: linux-iio@...r.kernel.org > +Description: > + Raw (unscaled no bias removal etc) temperature measurement. > + It an axis is specified it generally means that the temperature > + sensor is associated with one part of a compound device (e.g. > + a gyroscope axis). Units after application of scale and offset > + are milli degrees Celsuis. > + > +What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_raw > +What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_raw > +What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_raw > +KernelVersion: 2.6.35 > +Contact: linux-iio@...r.kernel.org > +Description: > + Acceleration in direction x, y or z (may be arbitrarily assigned > + but should match other such assignments on device). > + Has all of the equivalent parameters as per voltageY. Units > + after application of scale and offset are m/s^2. > + > +What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_raw > +What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_raw > +What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_raw > +KernelVersion: 2.6.35 > +Contact: linux-iio@...r.kernel.org > +Description: > + Angular velocity about axis x, y or z (may be arbitrarily > + assigned) Data converted by application of offset then scale to > + radians per second. Has all the equivalent parameters as > + per voltageY. Units after application of scale and offset are > + radians per second. > + > +What: /sys/bus/iio/devices/iio:deviceX/in_incli_x_raw > +What: /sys/bus/iio/devices/iio:deviceX/in_incli_y_raw > +What: /sys/bus/iio/devices/iio:deviceX/in_incli_z_raw > +KernelVersion: 2.6.35 > +Contact: linux-iio@...r.kernel.org > +Description: > + Inclination raw reading about axis x, y or z (may be > + arbitrarily assigned). Data converted by application of offset > + and scale to Degrees. > + > +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 > +KernelVersion: 2.6.35 > +Contact: linux-iio@...r.kernel.org > +Description: > + Magnetic field along axis x, y or z (may be arbitrarily > + assigned). Data converted by application of offset > + then scale to Gauss. > + > +What: /sys/bus/iio/devices/device[n]/illuminance0_input > +KernelVersion: 2.6.35 > +Contact: linux-iio@...r.kernel.org > +Description: > + This should return the calculated lux from the light sensor. > + Units are lumens. > + > +What: /sys/bus/iio/devices/iio:deviceX/in_intensityY_infrared_input > +KernelVersion: 2.6.37 > +Contact: linux-iio@...r.kernel.org > +Description: > + This property is supported by sensors that have an infrared > + sensitive element. Unfortunately this reading is very > + frequency range dependent and hence tends not to have well > + defined units. > + > +What: /sys/bus/iio/devices/iio:deviceX/in_intensityY_both_input > +KernelVersion: 2.6.37 > +Contact: linux-iio@...r.kernel.org > +Description: > + This property is supported by sensors that have an infrared > + and visible light sensing element. The visible portion is > + usually extracted by subtracting the value from a separate > + infrared only sensor. Unfortunately this reading is very > + frequency range dependent and hence tends not to have well > + defined units. > + > +What: /sys/bus/iio/devices/iio:deviceX/in_accel_offset > +What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_offset > +What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_offset > +What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_offset > +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_offset > +What: /sys/bus/iio/devices/iio:deviceX/in_voltage_offset > +What: /sys/bus/iio/devices/iio:deviceX/in_tempY_offset > +What: /sys/bus/iio/devices/iio:deviceX/in_temp_offset > +KernelVersion: 2.6.35 > +Contact: linux-iio@...r.kernel.org > +Description: > + If known for a device, offset to be added to<type>[Y]_raw prior > + to scaling by<type>[Y]_scale in order to obtain value in the > +<type> units as specified in<type>[y]_raw documentation. > + Not present if the offset is always 0 or unknown. If Y or > + axis<x|y|z> is not present, then the offset applies to all > + in channels of<type>. > + May be writable if a variable offset can be applied on the > + device. Note that this is different to calibbias which > + is for devices (or drivers) that apply offsets to compensate > + for variation between different instances of the part, typically > + adjusted by using some hardware supported calibration procedure. > + Calibbias is applied internally, offset is applied in userspace > + to the _raw output. > + > +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_scale > +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_scale > +What: /sys/bus/iio/devices/iio:deviceX/in_voltage_scale > +What: /sys/bus/iio/devices/iio:deviceX/out_voltageY_scale > +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_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 > +KernelVersion: 2.6.35 > +Contact: linux-iio@...r.kernel.org > +Description: > + If known for a device, scale to be applied to<type>Y[_name]_raw > + post addition of<type>[Y][_name]_offset in order to obtain the > + measured value in<type> units as specified in > +<type>[Y][_name]_raw documentation.. If shared across all in > + channels then Y and<x|y|z> are not present and the value is > + called<type>[Y][_name]_scale. The peak modifier means this > + value is applied to<type>Y[_name]_peak_raw values. > + > +What: /sys/bus/iio/devices/iio:deviceX/in_accel_scale_available > +What: /sys/.../iio:deviceX/in_voltageX_scale_available > +What: /sys/.../iio:deviceX/in_voltage-voltage_scale_available > +What: /sys/.../iio:deviceX/out_voltageX_scale_available > +What: /sys/.../iio:deviceX/in_capacitance_scale_available > +KernelVersion: 2.635 > +Contact: linux-iio@...r.kernel.org > +Description: > + If a discrete set of scale values are available, they > + are listed in this attribute. > + > +What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_calibbias > +What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_calibbias > +What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibbias > +What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibbias > +What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibbias > +What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibbias > +KernelVersion: 2.6.35 > +Contact: linux-iio@...r.kernel.org > +Description: > + Hardware applied calibration offset. (assumed to fix production > + inaccuracies). > + > +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_calibscale > +What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_calibscale > +What: /sys/bus/iio/devices/iio:deviceX/in_voltage_calibscale > +What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_calibscale > +What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_calibscale > +What: /sys/bus/iio/devices/iio:deviceX/in_accel_z_calibscale > +What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_calibscale > +What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibscale > +What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibscale > +What: /sys/.../iio:deviceX/in_intensityY_infrared_calibscale > +What: /sys/.../iio:deviceX/in_intensityY_both_calibscale > +KernelVersion: 2.6.35 > +Contact: linux-iio@...r.kernel.org > +Description: > + Hardware applied calibration scale factor. (assumed to fix > + production inaccuracies). If shared across all channels, > +<type>_calibscale is used. > \ No newline at end of file > -- > 1.7.7.2 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-iio" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- Greetings, Michael -- Analog Devices GmbH Wilhelm-Wagenfeld-Str. 6 80807 Muenchen Sitz der Gesellschaft: Muenchen; Registergericht: Muenchen HRB 40368; Geschaeftsfuehrer:Dr.Carsten Suckrow, Thomas Wessel, William A. Martin, Margaret Seif -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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