On 27 November 2012 08:10, Viresh Kumar <[email protected]> wrote: > On 27 November 2012 00:10, Grant Likely <[email protected]> wrote: >> It would actually be good to ask the interrupt controller driver what >> kind of interrupt signal it expects for a given interrupt line. That >> should also solve the problem and I think it would be more useful to >> other devices. Can you investigate whether or not >> irqd_get_trigger_type() returns the information you need? > > That's a pretty cool function to use. :) > > Will check it out :)
I was thinking about this logic in my earlier mail, don't know what stopped me from thinking it is wrong. :( Problem is with invert polarity, which the interrupt controller is not aware of. For example, suppose interrupt controller needs Rising edge interrupt, but the board has inverted the line between stmpe and IC. So, we will get Rising high from the routine you mentioned, but we need to generate opposite of that to make it rising high. And so interrupt polarity field is still required. -- viresh -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
