On Tue, Sep 27, 2011 at 04:59:28PM +0300, Felix Radensky wrote: > Hi, > > Looks like 8xxx GPIO driver cannot properly handle interrupts > when multiple GPIO controllers exist in the system. > > On Freescale P1022 there are 3 GPIO controllers. All 3 use > the same interrupt line, internal interrupt 31. If all controllers > are defined in device tree set_irq_chained_handler() is invoked > 3 times with same hardware irq number. The result is interrupt > storm, mpc8xxx_gpio_irq_cascade() is invoked indefinitely. > > What would be the best way to fix the problem ?
The solution is to make the gpio driver register as a regular interrupt handler, and not as a chained handler. g. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
