Max Filippov a2f6827682 xtensa: don't use linux IRQ #0 ...

commit e5c86679d5 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: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2017-06-17 06:41:58 +02:00

..

iss

xtensa: ISS: allow simdisk to use high memory buffers

2016-09-20 20:43:22 -07:00

xt2000

Merge tag 'xtensa-20161005' of git://github.com/jcmvbkbc/linux-xtensa

2016-10-05 17:44:48 -07:00

xtfpga

xtensa: don't use linux IRQ #0

2017-06-17 06:41:58 +02:00