diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2017-06-05 02:43:51 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-17 06:41:58 +0200 |
| commit | a2f68276822cd3a09ed9ae23e5c5e1cd8259af65 (patch) | |
| tree | 9bc3a7182cd01be8aee33ef098a1f37b843fd907 /arch/xtensa/include/asm/irq.h | |
| parent | 57211e84dda0583b85326c07909c442ba950e0f0 (diff) | |
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/asm/irq.h')
| -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) { } |