[PATCH v4 0/2] microchip-tcb-capture: Add Capture, Compare, Overflow etc. events

Bence Csókás
2025-02-11T15:21:21Z

The TCB has three R/W-able "general purpose" hardware registers:
RA, RB and RC. The hardware is capable of:
* sampling Counter Value Register (CV) to RA/RB on a trigger edge
* sending an interrupt of this change
* sending an interrupt on CV change due to trigger
* triggering an interrupt on CV compare to RC
* stop counting after sampling to RB

To enable using these features in user-space, an interrupt handler
was added, generating the necessary counter events. On top, RA/B/C
registers are added as Count Extensions. To aid interoperation, a
uapi header was also added, containing the various numeral IDs of
the Extensions, Event channels etc.

Bence Csókás (2):
counter: microchip-tcb-capture: Add IRQ handling
counter: microchip-tcb-capture: Add capture extensions for registers
RA-RC

MAINTAINERS | 1 +
drivers/counter/microchip-tcb-capture.c | 137 ++++++++++++++++++
.../linux/counter/microchip-tcb-capture.h | 49 +++++++
3 files changed, 187 insertions(+)
create mode 100644 include/uapi/linux/counter/microchip-tcb-capture.h

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2.48.1