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counter: Introduce the Signal polarity component

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The Signal polarity component represents the active level of a
respective Signal. There are two possible states: positive (rising edge)
and negative (falling edge); enum counter_signal_polarity represents
these states. A convenience macro COUNTER_COMP_POLARITY() is provided
for driver authors to declare a Signal polarity component.

Cc: Julien Panis <jpanis@baylibre.com>
Link: https://lore.kernel.org/r/8f47d6e1db71a11bb1e2666f8e2a6e9d256d4131.1664204990.git.william.gray@linaro.org/
Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
Link: https://lore.kernel.org/r/b6e53438badcb6318997d13dd2fc052f97d808ac.1664318353.git.william.gray@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
William Breathitt Gray 2022-09-27 18:53:38 -04:00 • committed by Greg Kroah-Hartman
parent 7bbf842cdc
commit 650ae67bbf
5 changed files with 43 additions and 0 deletions
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6
include/uapi/linux/counter.h
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@ -153,4 +153,10 @@ enum counter_synapse_action {
COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
};
/* Signal polarity values */
enum counter_signal_polarity {
COUNTER_SIGNAL_POLARITY_POSITIVE,
COUNTER_SIGNAL_POLARITY_NEGATIVE,
};
#endif /* _UAPI_COUNTER_H_ */