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Subject[PATCH v2 1/2] xtensa: allow variant to initialize own irq chips
Date
There was already a PLATFORM_NR_IRQS define, which is now accompanied
by a VARIANT_NR_IRQS. To be able to initialize these interrupts,
init_IRQ now calls a variant specific hook.

Changes compared to v1:
- adapted to new CONFIG_VARIANT_IRQ_EXT
- removed definition and call of platform_init_IRQ as there already
is a platform_init_irq defined in asm/platform.h with a weak default
in kernel/platform.c
- renamed variant_init_IRQ to variant_init_irq

Note that I could not find the call site of platform_init_irq although
it is stated in platform.h that it is called from init_IRQ.

Signed-off-by: Daniel Glöckner <dg@emlix.com>
---
arch/xtensa/include/asm/irq.h | 12 +++++++++++-
arch/xtensa/kernel/irq.c | 2 ++
2 files changed, 13 insertions(+), 1 deletions(-)

diff --git a/arch/xtensa/include/asm/irq.h b/arch/xtensa/include/asm/irq.h
index 4a39bb5..f10ee86 100644
--- a/arch/xtensa/include/asm/irq.h
+++ b/arch/xtensa/include/asm/irq.h
@@ -11,6 +11,7 @@
#ifndef _XTENSA_IRQ_H
#define _XTENSA_IRQ_H

+#include <linux/init.h>
#include <platform/hardware.h>
#include <variant/core.h>

@@ -23,11 +24,20 @@ static inline void variant_irq_enable(unsigned int irq) { }
static inline void variant_irq_disable(unsigned int irq) { }
#endif

+#ifndef VARIANT_NR_IRQS
+# define VARIANT_NR_IRQS 0
+#endif
#ifndef PLATFORM_NR_IRQS
# define PLATFORM_NR_IRQS 0
#endif
#define XTENSA_NR_IRQS XCHAL_NUM_INTERRUPTS
-#define NR_IRQS (XTENSA_NR_IRQS + PLATFORM_NR_IRQS)
+#define NR_IRQS (XTENSA_NR_IRQS + VARIANT_NR_IRQS + PLATFORM_NR_IRQS)
+
+#if VARIANT_NR_IRQS == 0
+static inline void variant_init_irq(void) { }
+#else
+void variant_init_irq(void) __init;
+#endif

static __inline__ int irq_canonicalize(int irq)
{
diff --git a/arch/xtensa/kernel/irq.c b/arch/xtensa/kernel/irq.c
index a36c85e..a1badb3 100644
--- a/arch/xtensa/kernel/irq.c
+++ b/arch/xtensa/kernel/irq.c
@@ -197,4 +197,6 @@ void __init init_IRQ(void)
}

cached_irq_mask = 0;
+
+ variant_init_irq();
}
--
1.6.1.3
--
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