pm24.git/include/linux/iio, branch v3.7-rc8

iio: Add some helper macros for unit conversion

2012-10-19T15:12:38Z

Some datasheets use a different unit to specify the channel scale than what IIO expects it to be. This patch adds two helper macros which allow to convert units commonly used in datasheets to IIO units: * acceleration: g -> meter / second**2 * angular velocity: degree (/ second) -> rad (/ second) This makes it much more convenient to specify and also easier to verify a channel's scale attribute. Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron

iio:inkern: Add function to read the processed value

2012-09-17T20:48:51Z

Add a function to read a processed value from a channel. The function will first attempt to read the IIO_CHAN_INFO_PROCESSED attribute. If that fails it will read the IIO_CHAN_INFO_RAW attribute and convert the result from a raw value to a processed value. The patch also introduces a function to convert raw value to a processed value and exports it, in case a user needs or wants to do the conversion by itself. Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron

iio: consumer.h: Fix kernel doc incosistency

2012-09-17T20:41:26Z

For the iio_read_channel_raw and iio_read_channel_scale the kerneldoc comment refers to an argument called "channel", while the argument is called "chan" in the function signature. This leads to the following warnings from kerneldoc: Warning(include/linux/iio/consumer.h:71): No description found for parameter 'chan' Warning(include/linux/iio/consumer.h:71): Excess function parameter 'channel' description in 'iio_read_channel_raw' Warning(include/linux/iio/consumer.h:109): No description found for parameter 'chan' Warning(include/linux/iio/consumer.h:109): Excess function parameter 'channel' description in 'iio_read_channel_scale' This patch fixes the warnings by naming them consistently. Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron

iio: Introduce a new fractional value type

2012-09-15T09:12:22Z

Currently IIO uses a decimal fixed point representations for real type numbers. This patch introduces a new representation for rational type numbers. The number will be expressed by specifying a numerator and denominator. For converting a raw value to a processed value multiply it by the numerator and divide it by the denominator. The reasoning for introducing this new type is that for a lot of devices the scale can be represented easily by a fractional number, but it is not possible to represent it as fixed point number without rounding. E.g. for a simple DAC the scale is often the reference voltage divided by the number of possible values (Usually 2**n_bits - 1). Each driver currently implements the conversion of this fraction to a fixed point number on its own. Also when it comes to the in-kernel interface this allows to directly use the fractional factors to convert a raw value to a processed value. This should on one hand require less instructions and on the other hand increase the precision. Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron

iio: Drop timestamp parameter from buffer store_to callback

2012-09-08T09:14:34Z

Drop timestamp parameter from buffer store_to callback and subsequently from iio_push_to_buffer. The timestamp parameter is unused and it seems likely that it will stay unused in the future, so it should be safe to remove it. Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron

iio: core: Add hysteresis in channel spec

2012-09-06T18:04:45Z

Added hysteresis to the list of channel info enumeration, shared /separate bit defines and to postfix channel info strings. Signed-off-by: srinivas pandruvada Signed-off-by: Jonathan Cameron

iio: whitespace cleanup and removal of semicolon after functions

2012-09-03T19:26:43Z

Signed-off-by: Peter Meerwald Signed-off-by: Jonathan Cameron

iio: fix typos

2012-09-03T19:26:43Z

Signed-off-by: Peter Meerwald Signed-off-by: Jonathan Cameron

iio: document missing elements

2012-09-03T19:26:42Z

Signed-off-by: Peter Meerwald Signed-off-by: Jonathan Cameron

iio:trigger_consumer.h: Add missing includes and forward declarations

2012-08-27T17:57:59Z

Add includes and forward declarations for types used in this file. This avoids compile errors if the other files have not been included before. Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron