user/sven/linux.git/include/linux/counter.h, branch v5.10.221Linux Kernel
https://git.stealer.net/cgit.cgi/user/sven/linux.git/atom?h=v5.10.2212019-10-18T18:47:49Zcounter: Fix typo in action_get description2019-10-18T18:47:49ZWilliam Breathitt Grayvilhelm.gray@gmail.com2019-10-06T20:03:11Zurn:sha1:c5d550fb6e126a73247d4a98d6314a84f4805b98
The action_get callback returns a Synapse's action mode.
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
counter: Simplify the count_read and count_write callbacks2019-10-18T18:47:27ZWilliam Breathitt Grayvilhelm.gray@gmail.com2019-10-06T20:03:09Zurn:sha1:d49e6ee2d6c2b654c5eeb9aa1c4986cd1bec2582
The count_read and count_write callbacks are simplified to pass val as
unsigned long rather than as an opaque data structure. The opaque
counter_count_read_value and counter_count_write_value structures,
counter_count_value_type enum, and relevant counter_count_read_value_set
and counter_count_write_value_get functions, are removed as they are no
longer used.
Cc: Patrick Havelange <patrick.havelange@essensium.com>
Acked-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Acked-by: David Lechner <david@lechnology.com>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
counter: Introduce the Generic Counter interface2019-04-25T19:33:37ZWilliam Breathitt Grayvilhelm.gray@gmail.com2019-04-02T06:30:36Zurn:sha1:0040a390d2fde44a03b3a05cf0cdf3e692ece60f
This patch introduces the Generic Counter interface for supporting
counter devices.
In the context of the Generic Counter interface, a counter is defined as
a device that reports one or more "counts" based on the state changes of
one or more "signals" as evaluated by a defined "count function."
Driver callbacks should be provided to communicate with the device: to
read and write various Signals and Counts, and to set and get the
"action mode" and "count function" for various Synapses and Counts
respectively.
To support a counter device, a driver must first allocate the available
Counter Signals via counter_signal structures. These Signals should
be stored as an array and set to the signals array member of an
allocated counter_device structure before the Counter is registered to
the system.
Counter Counts may be allocated via counter_count structures, and
respective Counter Signal associations (Synapses) made via
counter_synapse structures. Associated counter_synapse structures are
stored as an array and set to the the synapses array member of the
respective counter_count structure. These counter_count structures are
set to the counts array member of an allocated counter_device structure
before the Counter is registered to the system.
A counter device is registered to the system by passing the respective
initialized counter_device structure to the counter_register function;
similarly, the counter_unregister function unregisters the respective
Counter. The devm_counter_register and devm_counter_unregister functions
serve as device memory-managed versions of the counter_register and
counter_unregister functions respectively.
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>