• Kevin Hilman's avatar
    ARM: OMAP3: PM: fix shared PRCM interrupts: leave disabled at boot · 99b59df0
    Kevin Hilman authored
    By default, request_irq() will auto-enable the requested IRQ.
    
    For PRCM interrupts, we may want to avoid that until the PM core code
    is fully ready to handle the interrupts.  This is particularily true
    for IO pad interrupts on OMAP3, which are shared between the hwmod
    core and the PRM core.
    
    In order to avoid PRCM IO-chain interrupts until the PM core is ready
    to handle them, ready, set the IRQ_NOAUTOEN flag for the PRCM IO-chain
    interrupt,  which means it will remain disabled after request_irq().
    
    Then, explicitly enable the PRCM interrupts after the request_irq() in
    the PM core (but not in the hwmod core.)
    
    Special thanks to Tero Kristo for suggesting to isolate the fix to
    only the IO-chain interrupt on OMAP3 instead of all PRCM interrupts.
    
    Cc: Tero Kristo <t-kristo@ti.com>
    Acked-by: default avatarPaul Walmsley <paul@pwsan.com>
    Signed-off-by: default avatarKevin Hilman <khilman@ti.com>
    99b59df0
pm34xx.c 22 KB