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Subject[patch 09/12] xtensa: allow platform and variant to initialize own irq chips
Date
From: Daniel Glöckner <dg@emlix.com>

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 variant and platform specific hooks.

Signed-off-by: Daniel Glöckner <dg@emlix.com>
---
arch/xtensa/include/asm/irq.h | 21 ++++++++++++++++++---
arch/xtensa/kernel/irq.c | 3 +++
arch/xtensa/variants/dc232b/include/variant/irq.h | 4 ++++
arch/xtensa/variants/fsf/include/variant/irq.h | 4 ++++
arch/xtensa/variants/s6000/include/variant/irq.h | 1 +
5 files changed, 30 insertions(+), 3 deletions(-)
create mode 100644 arch/xtensa/variants/dc232b/include/variant/irq.h
create mode 100644 arch/xtensa/variants/fsf/include/variant/irq.h

diff --git a/arch/xtensa/include/asm/irq.h b/arch/xtensa/include/asm/irq.h
index dfac82d..c3c10a7 100644
--- a/arch/xtensa/include/asm/irq.h
+++ b/arch/xtensa/include/asm/irq.h
@@ -11,21 +11,36 @@
#ifndef _XTENSA_IRQ_H
#define _XTENSA_IRQ_H

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

-#ifdef CONFIG_VARIANT_IRQ_SWITCH
#include <variant/irq.h>
-#else
+#ifndef CONFIG_VARIANT_IRQ_SWITCH
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
+
+#if PLATFORM_NR_IRQS == 0
+static inline void platform_init_IRQ(void) { }
+#else
+void platform_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..61c03a3 100644
--- a/arch/xtensa/kernel/irq.c
+++ b/arch/xtensa/kernel/irq.c
@@ -197,4 +197,7 @@ void __init init_IRQ(void)
}

cached_irq_mask = 0;
+
+ variant_init_IRQ();
+ platform_init_IRQ();
}
diff --git a/arch/xtensa/variants/dc232b/include/variant/irq.h b/arch/xtensa/variants/dc232b/include/variant/irq.h
new file mode 100644
index 0000000..070b9f5
--- /dev/null
+++ b/arch/xtensa/variants/dc232b/include/variant/irq.h
@@ -0,0 +1,4 @@
+#ifndef __XTENSA_VARIANT_IRQ_H
+#define __XTENSA_VARIANT_IRQ_H
+
+#endif
diff --git a/arch/xtensa/variants/fsf/include/variant/irq.h b/arch/xtensa/variants/fsf/include/variant/irq.h
new file mode 100644
index 0000000..070b9f5
--- /dev/null
+++ b/arch/xtensa/variants/fsf/include/variant/irq.h
@@ -0,0 +1,4 @@
+#ifndef __XTENSA_VARIANT_IRQ_H
+#define __XTENSA_VARIANT_IRQ_H
+
+#endif
diff --git a/arch/xtensa/variants/s6000/include/variant/irq.h b/arch/xtensa/variants/s6000/include/variant/irq.h
index fa031cb..55403d1 100644
--- a/arch/xtensa/variants/s6000/include/variant/irq.h
+++ b/arch/xtensa/variants/s6000/include/variant/irq.h
@@ -2,6 +2,7 @@
#define __XTENSA_S6000_IRQ_H

#define NO_IRQ (-1)
+#define VARIANT_NR_IRQS 8 /* GPIO interrupts */

extern void variant_irq_enable(unsigned int irq);
extern void variant_irq_disable(unsigned int irq);
--
1.6.2.107.ge47ee
--
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