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| author | Max Filippov <jcmvbkbc@gmail.com> | 2017-06-05 12:43:51 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-17 07:39:38 +0300 |
| commit | afb415f72daa0d9d8169a20f3ea3efbf05f630ca (patch) | |
| tree | fb835faaa0562ed1283c85859e5c5fb136cd075c /arch/xtensa/include | |
| parent | 8b1aa267981223474cb5699b1c96eb7fa8eb08a8 (diff) | |
| download | linux-afb415f72daa0d9d8169a20f3ea3efbf05f630ca.tar.xz | |
xtensa: don't use linux IRQ #0
commit e5c86679d5e864947a52fb31e45a425dea3e7fa9 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>
Diffstat (limited to 'arch/xtensa/include')
| -rw-r--r-- | arch/xtensa/include/asm/irq.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/xtensa/include/asm/irq.h b/arch/xtensa/include/asm/irq.h index f71f88ea7646..19707db966f1 100644 --- a/arch/xtensa/include/asm/irq.h +++ b/arch/xtensa/include/asm/irq.h @@ -29,7 +29,8 @@ static inline void variant_irq_disable(unsigned int irq) { } # define PLATFORM_NR_IRQS 0 #endif #define XTENSA_NR_IRQS XCHAL_NUM_INTERRUPTS -#define NR_IRQS (XTENSA_NR_IRQS + VARIANT_NR_IRQS + PLATFORM_NR_IRQS) +#define NR_IRQS (XTENSA_NR_IRQS + VARIANT_NR_IRQS + PLATFORM_NR_IRQS + 1) +#define XTENSA_PIC_LINUX_IRQ(hwirq) ((hwirq) + 1) #if VARIANT_NR_IRQS == 0 static inline void variant_init_irq(void) { } |