On Wed, May 06, 2015 at 11:48:59PM -0700, Andrea Venturi wrote: > hello, > > i have an issue about external interrupts, following this clear example: > http://linux-sunxi.org/External_interrupts > > it works for EINT up to EINT21 in PH port, but if i try in an Olimex A20 > SOM (on a A20 SOM EVB who have a schematic available showing no hints > AFAICS) an EINT in PI port (EINT22-EINT31) nothing is raised when i put the > pin to GND. > > i slightly more thorough description is in Olimex forum > https://www.olimex.com/forum/index.php?topic=4400.0 but i suppose it's more > general issue, that's why i post here too (sorry if it's seen as a bad > attitude..) > > BTW the A20 PIO page on linux-sunxi.org doesn't talk about these higher > EINT22-EINT31 so i smell something fishy here: > http://linux-sunxi.org/A20/PIO > > any advice for further investigation?
There's more to it. I don't think that ever supposed to work that way, most notably because it just wouldn't work with SoCs that multiple interrupt banks (like the A31, A23, etc.) I think it worked by accident, because it's somewhat compatible with the default interrupt property parsing code, but that probably need some additional development. What's mainly missing would be an irq_xlate function in the pinctrl driver that would parse the interrupt property with the same format than we have for gpios (phandle excluded, of course), which would mean something like that in your case. interrupt-parent = <&pio>; interrups = <8 10 flags>; That function would then need to lookup in our pin array that it's indeed an interrupt, and would return the number of the interrupt within the interupt controller (which would be 22 in your case). I can try to cook something during the weekend, and send you a patch for you to test. Maxime -- Maxime Ripard, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
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