Merge tag 'counter-for-5.16a-take2' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into char-misc-next

Jonathan writes:

First set of counter subsystem new feature support for the 5.16 cycle

Most interesting element this time is the new chrdev based interface
for the counter subsystem.  Affects all drivers. Some minor precursor
patches.

Major parts:
* Bring all the sysfs attribute setup into the counter core rather than
  leaving it to individual drivers.  Docs updates accompany these changes.
* Move various definitions to a uapi header as now needed from userspace.
* Add the chardev interface + extensive documentation and example tool
* Add new ABI needed to identify indexes needed for chrdev interface
* Implement new interface for the 104-quad-8
* Follow up deals with wrong path for documentation build
* Various trivial cleanups and missing feature additions related to this
  series

* tag 'counter-for-5.16a-take2' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio:
  docs: counter: Include counter-chrdev kernel-doc to generic-counter.rst
  counter: fix docum. build problems after filename change
  counter: microchip-tcb-capture: Tidy up a false kernel-doc /** marking.
  counter: 104-quad-8: Add IRQ support for the ACCES 104-QUAD-8
  counter: 104-quad-8: Replace mutex with spinlock
  counter: Implement events_queue_size sysfs attribute
  counter: Implement *_component_id sysfs attributes
  counter: Implement signalZ_action_component_id sysfs attribute
  tools/counter: Create Counter tools
  docs: counter: Document character device interface
  counter: Add character device interface
  counter: Move counter enums to uapi header
  docs: counter: Update to reflect sysfs internalization
  counter: Update counter.h comments to reflect sysfs internalization
  counter: Internalize sysfs interface code
  counter: stm32-timer-cnt: Provide defines for slave mode selection
  counter: stm32-lptimer-cnt: Provide defines for clock polarities

Author: gregkh

Documentation/ABI/testing/sysfs-bus-counter

@@ -203,6 +203,27 @@ Description:
 		both edges:
 			Any state transition.
 
+What:		/sys/bus/counter/devices/counterX/countY/ceiling_component_id
+What:		/sys/bus/counter/devices/counterX/countY/floor_component_id
+What:		/sys/bus/counter/devices/counterX/countY/count_mode_component_id
+What:		/sys/bus/counter/devices/counterX/countY/direction_component_id
+What:		/sys/bus/counter/devices/counterX/countY/enable_component_id
+What:		/sys/bus/counter/devices/counterX/countY/error_noise_component_id
+What:		/sys/bus/counter/devices/counterX/countY/prescaler_component_id
+What:		/sys/bus/counter/devices/counterX/countY/preset_component_id
+What:		/sys/bus/counter/devices/counterX/countY/preset_enable_component_id
+What:		/sys/bus/counter/devices/counterX/countY/signalZ_action_component_id
+What:		/sys/bus/counter/devices/counterX/signalY/cable_fault_component_id
+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
+KernelVersion:	5.16
+Contact:	[email protected]
+Description:
+		Read-only attribute that indicates the component ID of the
+		respective extension or Synapse.
+
 What:		/sys/bus/counter/devices/counterX/countY/spike_filter_ns
 KernelVersion:	5.14
 Contact:	[email protected]
@@ -212,6 +233,14 @@ Description:
 		shorter or equal to configured value are ignored. Value 0 means
 		filter is disabled.
 
+What:		/sys/bus/counter/devices/counterX/events_queue_size
+KernelVersion:	5.16
+Contact:	[email protected]
+Description:
+		Size of the Counter events queue in number of struct
+		counter_event data structures. The number of elements will be
+		rounded-up to a power of 2.
+
 What:		/sys/bus/counter/devices/counterX/name
 KernelVersion:	5.2
 Contact:	[email protected]
@@ -286,7 +315,14 @@ What:		/sys/bus/counter/devices/counterX/signalY/signal
 KernelVersion:	5.2
 Contact:	[email protected]
 Description:
-		Signal data of Signal Y represented as a string.
+		Signal level state of Signal Y. The following signal level
+		states are available:
+
+		low:
+			Low level state.
+
+		high:
+			High level state.
 
 What:		/sys/bus/counter/devices/counterX/signalY/synchronous_mode
 KernelVersion:	5.2