On Fri, Sep 22, 2023 at 04:39:14PM +0200, Fabrice Gasnier wrote: > This series combines some fix and improvements to the counter interface, > found while stm32 timer counter driver developements. > It also introduces a new tool that can be used for testing. > > Then, it improves the stm32 timer counter driver by introducing new signals, > e.g. counting frequency, and missing channels. > It also adds support for interrupt based events using the chrdev interface. > Two event types are added in this series: overflows and capture. > > Up to now, stm32 timer counter driver focused mainly on quadrature > encoder feature. With this series, all timer instances can be enabled > for simple counting (with overflow and capture events). Hi Fabrice, Would you give a brief summary of the possible configurations we can have for these devices. For example, the existing driver supports a quadrature counting mode where Channel 1 and Channel 2 serve as A and B inputs; I also see that another mode is a simple tally counter with the internal clock serving as the input. How do Channel 3 and Channel 4 fit in here? If you list out all the possible arrangements, I think it'll help me understand how the signals match up with each particular mode. Thanks, William Breathitt Gray > > Changes in v2: > - counter fix and improvement patch applied, hence dropped in v2 series > - mfd patch applied, hence dropped in v2 series > - revisit watch events tool (mainly command line interface) > - add one patch to rename STM32 Timer counter > - various review comments from v1 > > Fabrice Gasnier (6): > tools/counter: add a flexible watch events tool > counter: stm32-timer-cnt: rename quadrature signal > counter: stm32-timer-cnt: rename counter > counter: stm32-timer-cnt: introduce clock signal > counter: stm32-timer-cnt: populate capture channels and check encoder > counter: stm32-timer-cnt: add support for events > > drivers/counter/stm32-timer-cnt.c | 558 ++++++++++++++++++++++++++- > include/linux/mfd/stm32-timers.h | 15 + > tools/counter/Build | 1 + > tools/counter/Makefile | 12 +- > tools/counter/counter_watch_events.c | 368 ++++++++++++++++++ > 5 files changed, 934 insertions(+), 20 deletions(-) > create mode 100644 tools/counter/counter_watch_events.c > > -- > 2.25.1 >
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