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staging:iio: Add documentation for IIO_EVENT_CODE
Document the different parameters of the IIO_EVENT_CODE macro and friends. While we are at it standardise the name of channel type parameter. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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@ -40,6 +40,18 @@ enum iio_event_direction {
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IIO_EV_DIR_FALLING,
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};
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/**
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* IIO_EVENT_CODE() - create event identifier
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* @chan_type: Type of the channel. Should be one of enum iio_chan_type.
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* @diff: Whether the event is for an differential channel or not.
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* @modifier: Modifier for the channel. Should be one of enum iio_modifier.
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* @direction: Direction of the event. One of enum iio_event_direction.
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* @type: Type of the event. Should be one enum iio_event_type.
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* @chan: Channel number for non-differential channels.
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* @chan1: First channel number for differential channels.
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* @chan2: Second channel number for differential channels.
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*/
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#define IIO_EVENT_CODE(chan_type, diff, modifier, direction, \
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type, chan, chan1, chan2) \
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(((u64)type << 56) | ((u64)diff << 55) | \
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@ -51,12 +63,29 @@ enum iio_event_direction {
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#define IIO_EV_BIT(type, direction) \
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(1 << (type*IIO_EV_DIR_MAX + direction))
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#define IIO_MOD_EVENT_CODE(channelclass, number, modifier, \
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type, direction) \
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IIO_EVENT_CODE(channelclass, 0, modifier, direction, type, number, 0, 0)
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/**
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* IIO_MOD_EVENT_CODE() - create event identifier for modified channels
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* @chan_type: Type of the channel. Should be one of enum iio_chan_type.
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* @number: Channel number.
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* @modifier: Modifier for the channel. Should be one of enum iio_modifier.
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* @type: Type of the event. Should be one enum iio_event_type.
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* @direction: Direction of the event. One of enum iio_event_direction.
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*/
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#define IIO_UNMOD_EVENT_CODE(channelclass, number, type, direction) \
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IIO_EVENT_CODE(channelclass, 0, 0, direction, type, number, 0, 0)
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#define IIO_MOD_EVENT_CODE(chan_type, number, modifier, \
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type, direction) \
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IIO_EVENT_CODE(chan_type, 0, modifier, direction, type, number, 0, 0)
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/**
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* IIO_UNMOD_EVENT_CODE() - create event identifier for unmodified channels
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* @chan_type: Type of the channel. Should be one of enum iio_chan_type.
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* @number: Channel number.
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* @type: Type of the event. Should be one enum iio_event_type.
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* @direction: Direction of the event. One of enum iio_event_direction.
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*/
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#define IIO_UNMOD_EVENT_CODE(chan_type, number, type, direction) \
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IIO_EVENT_CODE(chan_type, 0, 0, direction, type, number, 0, 0)
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#define IIO_EVENT_CODE_EXTRACT_TYPE(mask) ((mask >> 56) & 0xFF)
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