sh: rework ipr code

This patch reworks the ipr code by grouping the offset array together
with the ipr_data structure in a new data structure called ipr_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. This strategy has much in common with the recently merged
intc2 code.

One logic change has been made - the original ipr 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, 23 insertions, 0 deletions

diff --git a/include/asm-sh/hw_irq.h b/include/asm-sh/hw_irq.h
index f9dfdc04aef5..4ca3f765bacc 100644
--- a/include/asm-sh/hw_irq.h
+++ b/include/asm-sh/hw_irq.h
@@ -24,4 +24,27 @@ struct intc2_desc {
 void register_intc2_controller(struct intc2_desc *);
 void init_IRQ_intc2(void);
 
+struct ipr_data {
+        unsigned char irq;
+        unsigned char ipr_idx;          /* Index for the IPR registered */
+        unsigned char shift;            /* Number of bits to shift the data */
+        unsigned char priority;         /* The priority */
+};
+
+struct ipr_desc {
+        unsigned long *ipr_offsets;
+        unsigned int nr_offsets;
+        struct ipr_data *ipr_data;
+        unsigned int nr_irqs;
+        struct irq_chip chip;
+};
+
+void register_ipr_controller(struct ipr_desc *);
+void init_IRQ_ipr(void);
+
+/*
+ * Enable individual interrupt mode for external IPR IRQs.
+ */
+void ipr_irq_enable_irlm(void);
+
 #endif /* __ASM_SH_HW_IRQ_H */