On 06/21/2018 04:06 PM, William Breathitt Gray wrote:
I decided to strip down these devices to arrive at the core essence of what constitutes a "counter device" and therefore design a "generic counter" abstraction to better represent these devices and prevent the ambiguity we discovered with the existing IIO Counter interface. This abstraction became the Generic Counter paradigm, which is explained in detail within the Documentation/driver-api/generic-counter.rst file introduced by this patchset.
I'm curious if you have given any thought to the time aspect of counters. I am interested in the rate at which the counters are counting (e.g. how many counts per second). I realize that you can calculate this in userspace or in the kernel using the system timer, but it is not very accurate since Linux is not a realtime OS. So, I would like to get the rate directly from the hardware. For example, the TI eQEP[1], like the one found in BeagleBones, has a couple ways of measuring time (see link for details). [1]: http://www.ti.com/lit/ug/sprug05a/sprug05a.pdf -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
