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| author | Oleksij Rempel <o.rempel@pengutronix.de> | 2021-03-01 09:04:01 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-03-25 19:13:51 +0000 |
| commit | a55ebd47f21f6f0472766fb52c973849e31d1466 (patch) | |
| tree | 80af6b63962442b5a719f22a7adcc128e479cfbe /drivers/counter/Kconfig | |
| parent | 0b8061c340b643e01da431dd60c75a41bb1d31ec (diff) | |
| download | lwn-a55ebd47f21f6f0472766fb52c973849e31d1466.tar.gz lwn-a55ebd47f21f6f0472766fb52c973849e31d1466.zip | |
counter: add IRQ or GPIO based counter
Add simple IRQ or GPIO base counter. This device is used to measure
rotation speed of some agricultural devices, so no high frequency on the
counter pin is expected.
The maximal measurement frequency depends on the CPU and system load. On
the idle iMX6S I was able to measure up to 20kHz without count drops.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Reviewed-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Link: https://lore.kernel.org/r/20210301080401.22190-3-o.rempel@pengutronix.de
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/counter/Kconfig')
| -rw-r--r-- | drivers/counter/Kconfig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/counter/Kconfig b/drivers/counter/Kconfig index 1391e8ea64fe..5328705aa09c 100644 --- a/drivers/counter/Kconfig +++ b/drivers/counter/Kconfig @@ -29,6 +29,16 @@ config 104_QUAD_8 The base port addresses for the devices may be configured via the base array module parameter. +config INTERRUPT_CNT + tristate "Interrupt counter driver" + depends on GPIOLIB + help + Select this option to enable interrupt counter driver. Any interrupt + source can be used by this driver as the event source. + + To compile this driver as a module, choose M here: the + module will be called interrupt-cnt. + config STM32_TIMER_CNT tristate "STM32 Timer encoder counter driver" depends on MFD_STM32_TIMERS || COMPILE_TEST |