Re: [Patch 0/4] IndustrialIO subsystem (ADCs, accelerometers etc)

[David Brownell <david-b@pacbell.net>]

On Wednesday 23 July 2008, Jonathan Cameron wrote:
> * Software ring buffer support to allow semi regular capture of data form the
>   device.  Typically this will be driven from either datardy events, or from
>   a periodic timer interrupt (to this end a very simple wrapper for periodic
>   RTC's is included. This will move to more generic timer interfaces as and when
>   they become available.  For now available rtc's must be registered with the
>   subsystem via the industrialio_register_ptimer function form within a board
>   init.

Could you elaborate a bit on why you'd want hardware supported
periodic timers, rather than either an hrtimer or a timer?
Maybe provide some real-world scenarios where those software
abstractions are inappropriate.

I can imagine numerous reasons, but those might not be yours...

- Dave