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| author | William Breathitt Gray | 2019-04-02 08:30:36 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2019-04-25 21:33:37 +0200 |
| commit | 0040a390d2fde44a03b3a05cf0cdf3e692ece60f (patch) | |
| tree | 29901e0b8bc3a2e4387509bb35203b6f79f70f59 /MAINTAINERS | |
| parent | staging: kpc2000: Add DMA driver (diff) | |
| download | kernel-qcow2-linux-0040a390d2fde44a03b3a05cf0cdf3e692ece60f.tar.gz kernel-qcow2-linux-0040a390d2fde44a03b3a05cf0cdf3e692ece60f.tar.xz kernel-qcow2-linux-0040a390d2fde44a03b3a05cf0cdf3e692ece60f.zip | |
counter: Introduce the Generic Counter interface
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>
Diffstat (limited to 'MAINTAINERS')
| -rw-r--r-- | MAINTAINERS | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 8c4ee2479498..5038b36867e9 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4054,6 +4054,14 @@ W: http://www.fi.muni.cz/~kas/cosa/ S: Maintained F: drivers/net/wan/cosa* +COUNTER SUBSYSTEM +M: William Breathitt Gray <vilhelm.gray@gmail.com> +L: linux-iio@vger.kernel.org +S: Maintained +F: drivers/counter/ +F: include/linux/counter.h +F: include/linux/counter_enum.h + CPMAC ETHERNET DRIVER M: Florian Fainelli <f.fainelli@gmail.com> L: netdev@vger.kernel.org |