sh: rework intc2 code

The shared intc2 code currently contains cpu-specific #ifdefs.
This is a tad unclean and it prevents us from using the shared code
to drive board-specific irqs on the se7780 board.

This patch reworks the intc2 code by moving the base addresses of
the intc2 registers into struct intc2_desc. This new structure also
contains the name of the controller in struct irq_chip. The idea
behind putting struct irq_chip in there is that we can use offsetof()
to locate the base addresses in the irq_chip callbacks.

One logic change has been made - the original shared intc2 code
enabled the interrupts by default but with this patch they are all
disabled by default.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 19 insertions, 0 deletions

diff --git a/include/asm-sh/hw_irq.h b/include/asm-sh/hw_irq.h
index 80ee1cd..f9dfdc0 100644
--- a/include/asm-sh/hw_irq.h
+++ b/include/asm-sh/hw_irq.h
@@ -5,4 +5,23 @@
 
 extern atomic_t irq_err_count;
 
+struct intc2_data {
+	unsigned short irq;
+	unsigned char ipr_offset, ipr_shift;
+	unsigned char msk_offset, msk_shift;
+	unsigned char priority;
+};
+
+struct intc2_desc {
+	unsigned long prio_base;
+	unsigned long msk_base;
+	unsigned long mskclr_base;
+	struct intc2_data *intc2_data;
+	unsigned int nr_irqs;
+	struct irq_chip chip;
+};
+
+void register_intc2_controller(struct intc2_desc *);
+void init_IRQ_intc2(void);
+
 #endif /* __ASM_SH_HW_IRQ_H */