kernel/linux.git/include/linux/iio/sysfs.h, branch v6.18.21

iio: Add IIO_STATIC_CONST_DEVICE_ATTR

2022-11-23T19:44:03+00:00

Add IIO_STATIC_CONST_DEVICE_ATTR macro for creating an read-only iio_dev_attr which returns constant value. This macro is intended to be used when replacing the IIO_CONST_ATTR - attributes for triggered buffers because the triggered buffer attributes must be of type iio_dev_attr. Signed-off-by: Matti Vaittinen Link: https://lore.kernel.org/r/8dd853dd0ef8eb40cb980cc6f6e7a43166de3afb.1664782676.git.mazziesaccount@gmail.com Signed-off-by: Jonathan Cameron

iio: add reference to iio buffer on iio_dev_attr

2021-03-11T20:47:04+00:00

This change adds a reference to a 'struct iio_buffer' object on the iio_dev_attr object. This way, we can use the created iio_dev_attr objects on per-buffer basis (since they're allocated anyway). A minor downside of this change is that the number of parameters on __iio_add_chan_devattr() grows by 1. This looks like it could do with a bit of a re-think. Signed-off-by: Alexandru Ardelean Link: https://lore.kernel.org/r/20210215104043.91251-14-alexandru.ardelean@analog.com Signed-off-by: Jonathan Cameron

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19T15:09:55+00:00

Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Enrico Weigelt Reviewed-by: Kate Stewart Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman

include: linux: iio: add IIO_ATTR_{RO, WO, RW} and IIO_DEVICE_ATTR_{RO, WO, RW} macros

2016-10-01T13:43:59+00:00

Add new macros: IIO_ATTR_RO, IIO_ATTR_WO, IIO_ATTR_RW, IIO_DEVICE_ATTR_RO, IIO_DEVICE_ATTR_WO and IIO_DEVICE_ATTR_RW to reduce the amount of boiler plate code that is needed for creating new attributes. This mimics the *_RO, *_WO, and *_RW macros that are found in include/linux/device.h and include/linux/sysfs.h. Signed-off-by: Brian Masney Acked-by: Greg Kroah-Hartman Signed-off-by: Jonathan Cameron

include: linux: iio: Add missing kernel doc field

2015-08-02T17:36:05+00:00

Fix kernel doc for the iio_dev_attr structure by adding its missing field. Signed-off-by: Cristina Opriceana Signed-off-by: Jonathan Cameron

iio: Add INT_TIME (integration time) channel info attribute

2013-09-14T20:16:44+00:00

Integration time is in seconds; it controls the measurement time and influences the gain of a sensor. There are two typical ways that scaling is implemented in a device: 1) input amplifier, 2) reference to the ADC is changed. These both result in the accuracy of the ADC varying (by applying its sampling over a more relevant range). Integration time is a way of dealing with noise inherent in the analog sensor itself. In the case of a light sensor, a mixture of photon noise and device specific noise. Photon noise is dealt with by either improving the efficiency of the sensor, (more photons actually captured) which is not easily varied dynamically, or by integrating the measurement over a longer time period. Note that this can also be thought of as an averaging of a number of individual samples and is infact sometimes implemented this way. Altering integration time implies that the duration of a measurement changes, a fact the device's user may be interested in. Hence it makes sense to distinguish between integration time and simple scale. In some devices both types of control are present and whilst they will have similar effects on the amplitude of the reading, their effect on the noise of the measurements will differ considerably. Used by adjd_s311, tsl4531, tcs3472 The following drivers have similar controls (and could be adapted): * tsl2563 (integration time is controlled via CALIBSCALE among other things) * tsl2583 (has integration_time device_attr, but driver doesn't use channels yet) * tsl2x7x (has integration_time attr) Signed-off-by: Peter Meerwald Cc: Jon Brenner Signed-off-by: Jonathan Cameron

iio: Remove IIO_DEV_ATTR_RESET macro

2013-08-03T17:40:37+00:00

There are no users of this macro left and we have come to the conclusion that it is not a good idea to expose the raw chip reset to userspace so the macro is very unlikely to be used in new drivers. Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron

iio: correct documentation for IIO_CONST_ATTR_SAMP_FREQ_AVAIL, match name of #define

2012-06-19T00:31:42+00:00

Signed-off-by: Peter Meerwald Acked-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman

IIO: Move core headers to include/linux/iio

2012-04-25T18:01:43+00:00

Step 1 in moving the IIO core out of staging. Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman