On Monday 04 June 2007 17:37, DI BACCO ANTONIO - technolabs wrote: > I have a component named pca9555 (on the i2c bus) that is an I/O expander. > It can generate an interrupt to the MPC8xx processor (SIU_IRQ1 pin). This > pin will be active till I read registers of pca9555. Because I cannot > access the i2c bus in the interrupt handler I queue a work on a work queue. > Just at the end of the interrupt handler should I disable the interrupt on > the mpc8xx? I think that otherwise the interrupt will pop up again till I > execute the work in the work queue finally reading the pca9555 and shutting > off the source of the interrupt.
Well, why don't you simply program the interrupt to be edge-triggered in the SIEL register? This way it will only occur again after the pin level is cleared. HTH, Ricardo. _______________________________________________ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
