On 02/22/11 22:35, Mike Frysinger wrote: > On Tue, Feb 22, 2011 at 10:03, Jonathan Cameron wrote: >> On 02/16/11 13:42, michael.hennerich@xxxxxxxxxx wrote: >>> This driver allows any Blackfin system timer to be used as IIO trigger. >>> It supports trigger rates from 0 to 100kHz in Hz resolution. >> >> The reason we ended up with a rtc based trigger in the first place, was that >> I had a very similar set of timers on the pxa271 that I mainly develop with. >> >> At the time some debate opened up on whether there was a use case here for >> a more general way of providing access to system periodic timers for exactly >> this sort of device. The view seemed to be that there was, but I certainly didn't >> have time to do it at the time and no one else seems to have looked at it since. >> My dirty solution was an rtc driver that just added a lot of rtcs. It was never >> going to merge though... >> >> Right now I can only track down a previous email from myself saying this has >> been discussed a number of times, but naturally with no references at all. Oops. >> >> Anyhow, such a general subsystem for cpu timers doesn't exist AFAIK so for now >> lets just go with your approach. Perhaps if we find other possible users we can >> talk again about how best to support these. > > does this offer functionality that is not available in the new PWM framework ? > http://thread.gmane.org/gmane.linux.kernel.embedded/3400 It's certainly conceivable that we could treat these as some sort of 'virtual' pwm, possibly with rather more limited controls than you usual get. -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
