• Bastian Hecht's avatar
    irqchip: intc-irqpin: Add support for shared interrupt lines · 427cc720
    Bastian Hecht authored
    On some hardware we don't have a 1-1 mapping from the external
    interrupts coming from INTC to the GIC SPI pins. We can however
    share lines to demux incoming IRQs on these SoCs.
    This patch enables the intc_irqpin driver to detect requests for shared
    interrupt lines and demuxes them properly by querying the INTC INTREQx0A
    If you need multiple shared intc_irqpin device instances, be sure to mask
    out all interrupts on the INTC that share the one line before you start
    to register them. Else you run into IRQ floods that would be caused by
    interrupts for which no handler has been set up yet when the first
    intc_irqpin device is registered.
    Signed-off-by: default avatarBastian Hecht <hechtb+renesas@gmail.com>
    Acked-by: default avatarMagnus Damm <damm@opensource.se>
    Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
irq-renesas-intc-irqpin.c 14.7 KB