• Max Filippov's avatar
    xtensa: don't use linux IRQ #0 · a2f68276
    Max Filippov authored
    commit e5c86679 upstream.
    
    Linux IRQ #0 is reserved for error reporting and may not be used.
    Increase NR_IRQS for one additional slot and increase
    irq_domain_add_legacy parameter first_irq value to 1, so that linux
    IRQ #0 is not associated with hardware IRQ #0 in legacy IRQ domains.
    Introduce macro XTENSA_PIC_LINUX_IRQ for static translation of xtensa
    PIC hardware IRQ # to linux IRQ #. Use this macro in XTFPGA platform
    data definitions.
    
    This fixes inability to use hardware IRQ #0 in configurations that don't
    use device tree and allows for non-identity mapping between linux IRQ #
    and hardware IRQ #.
    Signed-off-by: 's avatarMax Filippov <jcmvbkbc@gmail.com>
    Signed-off-by: 's avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    a2f68276
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