On Sat, Oct 16, 2021 at 08:33:43PM -0500, David Lechner wrote: > This adds documentation for new counter subsystem edge_capture_unit_* > sysfs attributes. > > Signed-off-by: David Lechner <david@xxxxxxxxxxxxxx> > --- > Documentation/ABI/testing/sysfs-bus-counter | 37 +++++++++++++++++++++ > 1 file changed, 37 insertions(+) > > diff --git a/Documentation/ABI/testing/sysfs-bus-counter b/Documentation/ABI/testing/sysfs-bus-counter > index 78bb1a501007..6c192c8c2b55 100644 > --- a/Documentation/ABI/testing/sysfs-bus-counter > +++ b/Documentation/ABI/testing/sysfs-bus-counter > @@ -59,6 +59,7 @@ What: /sys/bus/counter/devices/counterX/countY/error_noise_available > What: /sys/bus/counter/devices/counterX/countY/function_available > What: /sys/bus/counter/devices/counterX/countY/prescaler_available > What: /sys/bus/counter/devices/counterX/countY/signalZ_action_available > +What: /sys/bus/counter/devices/counterX/edge_capture_unit_prescaler_available > What: /sys/bus/counter/devices/counterX/latch_mode_available > What: /sys/bus/counter/devices/counterX/signalY/index_polarity_available > What: /sys/bus/counter/devices/counterX/signalY/synchronous_mode_available > @@ -230,6 +231,10 @@ What: /sys/bus/counter/devices/counterX/signalY/cable_fault_enable_component_id > What: /sys/bus/counter/devices/counterX/signalY/filter_clock_prescaler_component_id > What: /sys/bus/counter/devices/counterX/signalY/index_polarity_component_id > What: /sys/bus/counter/devices/counterX/signalY/synchronous_mode_component_id > +What: /sys/bus/counter/devices/edge_capture_unit_enable_component_id > +What: /sys/bus/counter/devices/edge_capture_unit_latched_period_component_id > +What: /sys/bus/counter/devices/edge_capture_unit_max_period_component_id > +What: /sys/bus/counter/devices/edge_capture_unit_prescaler_component_id > What: /sys/bus/counter/devices/latch_mode_component_id > What: /sys/bus/counter/devices/unit_timer_enable_component_id > What: /sys/bus/counter/devices/unit_timer_period_component_id > @@ -249,6 +254,38 @@ Description: > shorter or equal to configured value are ignored. Value 0 means > filter is disabled. > > +What: /sys/bus/counter/devices/edge_capture_unit_enable > +KernelVersion: 5.16 > +Contact: linux-iio@xxxxxxxxxxxxxxx > +Description: > + Read/write attribute that starts or stops the Edge Capture Unit. > + Valid values are boolean. > + > +What: /sys/bus/counter/devices/edge_capture_unit_latched_period > +KernelVersion: 5.16 > +Contact: linux-iio@xxxxxxxxxxxxxxx > +Description: > + Latched period of the Edge Capture Unit represented as a string. > + The value is latched in based on the trigger selected by the > + counterX/latch_mode attribute. Units are nanoseconds. > + > +What: /sys/bus/counter/devices/edge_capture_unit_max_period > +KernelVersion: 5.16 > +Contact: linux-iio@xxxxxxxxxxxxxxx > +Description: > + Read/write attribute that selects the maximum period that can > + be measured by the Edge Capture Unit. Units are nanoseconds. > + > +What: /sys/bus/counter/devices/edge_capture_unit_prescaler > +KernelVersion: 5.16 > +Contact: linux-iio@xxxxxxxxxxxxxxx > +Description: > + Read/write attribute that selects the how the > + counterX/countY/count value is scaled coming in to the Edge > + Capture Unit. This acts like a clock divider, e.g. if a value > + of 4 is selected, the Edge Capture Unit will measure the period > + between every 4 counts. > + I'd like to see that naming for this made more generic if possible so that other drivers can use these extensions in the future. For example, instead of the "edge_capture_unit_*" prefix, perhaps "latched_count_*" would be appropriate. Would this be feasible? William Breathitt Gray > What: /sys/bus/counter/devices/counterX/events_queue_size > KernelVersion: 5.16 > Contact: linux-iio@xxxxxxxxxxxxxxx > -- > 2.25.1 >
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