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| author | William Breathitt Gray <william.gray@linaro.org> | 2022-09-28 01:53:38 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-30 15:32:35 +0300 |
| commit | 650ae67bbf7ba5ac193f053969612fbb93247b64 (patch) | |
| tree | bf80c0c98c877ded950722bbb4001d9d264ebb54 /include/linux/counter.h | |
| parent | 7bbf842cdcff30ddd1da4ab9059cf92f9d1a4326 (diff) | |
| download | linux-650ae67bbf7ba5ac193f053969612fbb93247b64.tar.xz | |
counter: Introduce the Signal polarity component
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>
Diffstat (limited to 'include/linux/counter.h')
| -rw-r--r-- | include/linux/counter.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/counter.h b/include/linux/counter.h index a81234bc8ea8..b3fb6b68881a 100644 --- a/include/linux/counter.h +++ b/include/linux/counter.h @@ -31,6 +31,7 @@ enum counter_comp_type { COUNTER_COMP_ENUM, COUNTER_COMP_COUNT_DIRECTION, COUNTER_COMP_COUNT_MODE, + COUNTER_COMP_SIGNAL_POLARITY, }; /** @@ -477,6 +478,15 @@ struct counter_available { #define COUNTER_COMP_FLOOR(_read, _write) \ COUNTER_COMP_COUNT_U64("floor", _read, _write) +#define COUNTER_COMP_POLARITY(_read, _write, _available) \ +{ \ + .type = COUNTER_COMP_SIGNAL_POLARITY, \ + .name = "polarity", \ + .signal_u32_read = (_read), \ + .signal_u32_write = (_write), \ + .priv = &(_available), \ +} + #define COUNTER_COMP_PRESET(_read, _write) \ COUNTER_COMP_COUNT_U64("preset", _read, _write) |