diff options
| author | William Breathitt Gray <vilhelm.gray@gmail.com> | 2021-09-29 12:16:06 +0900 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-10-17 10:55:55 +0100 |
| commit | 7aa2ba0df651e3193c24b5da4887759ed788578c (patch) | |
| tree | 598f2430887c0ff14bacf7dbdc1e39723639bd83 /drivers/counter/Kconfig | |
| parent | 09db4678bfbb429df259e1ce43854a0e2720c355 (diff) | |
counter: 104-quad-8: Add IRQ support for the ACCES 104-QUAD-8
The LSI/CSI LS7266R1 chip provides programmable output via the FLG pins.
When interrupts are enabled on the ACCES 104-QUAD-8, they occur whenever
FLG1 is active. Four functions are available for the FLG1 signal: Carry,
Compare, Carry-Borrow, and Index.
Carry:
Interrupt generated on active low Carry signal. Carry
signal toggles every time the respective channel's
counter overflows.
Compare:
Interrupt generated on active low Compare signal.
Compare signal toggles every time respective channel's
preset register is equal to the respective channel's
counter.
Carry-Borrow:
Interrupt generated on active low Carry signal and
active low Borrow signal. Carry signal toggles every
time the respective channel's counter overflows. Borrow
signal toggles every time the respective channel's
counter underflows.
Index:
Interrupt generated on active high Index signal.
These four functions correspond respectivefly to the following four
Counter event types: COUNTER_EVENT_OVERFLOW, COUNTER_EVENT_THRESHOLD,
COUNTER_EVENT_OVERFLOW_UNDERFLOW, and COUNTER_EVENT_INDEX. Interrupts
push Counter events to event channel X, where 'X' is the respective
channel whose FLG1 activated.
This patch adds IRQ support for the ACCES 104-QUAD-8. The interrupt line
numbers for the devices may be configured via the irq array module
parameter.
Acked-by: Syed Nayyar Waris <syednwaris@gmail.com>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Link: https://lore.kernel.org/r/e3a28e100840e3a336fa93fce77445f0e9d9a674.1632884256.git.vilhelm.gray@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/counter/Kconfig')
| -rw-r--r-- | drivers/counter/Kconfig | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/counter/Kconfig b/drivers/counter/Kconfig index d5d2540b30c2..3dcdb681c4e4 100644 --- a/drivers/counter/Kconfig +++ b/drivers/counter/Kconfig @@ -23,11 +23,11 @@ config 104_QUAD_8 A counter's respective error flag may be cleared by performing a write operation on the respective count value attribute. Although the 104-QUAD-8 counters have a 25-bit range, only the lower 24 bits may be - set, either directly or via the counter's preset attribute. Interrupts - are not supported by this driver. + set, either directly or via the counter's preset attribute. The base port addresses for the devices may be configured via the base - array module parameter. + array module parameter. The interrupt line numbers for the devices may + be configured via the irq array module parameter. config INTERRUPT_CNT tristate "Interrupt counter driver" |