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, 22 insertions, 18 deletions

diff --git a/arch/sh/kernel/cpu/sh3/setup-sh7705.c b/arch/sh/kernel/cpu/sh3/setup-sh7705.c
index 1983fb7ad6ea..a55b8ce2c54c 100644
--- a/arch/sh/kernel/cpu/sh3/setup-sh7705.c
+++ b/arch/sh/kernel/cpu/sh3/setup-sh7705.c
@@ -48,7 +48,7 @@ static int __init sh7705_devices_setup(void)
 }
 __initcall(sh7705_devices_setup);
 
-static struct ipr_data sh7705_ipr_map[] = {
+static struct ipr_data ipr_irq_table[] = {
         /* IRQ, IPR-idx, shift, priority */
         { 16, 0, 12, 2 }, /* TMU0 TUNI*/
         { 17, 0,  8, 2 }, /* TMU1 TUNI */
@@ -70,25 +70,29 @@ static struct ipr_data sh7705_ipr_map[] = {
 };
 
 static unsigned long ipr_offsets[] = {
-        0xFFFFFEE2      /* 0: IPRA */
-,       0xFFFFFEE4      /* 1: IPRB */
-,       0xA4000016      /* 2: IPRC */
-,       0xA4000018      /* 3: IPRD */
-,       0xA400001A      /* 4: IPRE */
-,       0xA4080000      /* 5: IPRF */
-,       0xA4080002      /* 6: IPRG */
-,       0xA4080004      /* 7: IPRH */
+        0xFFFFFEE2,     /* 0: IPRA */
+        0xFFFFFEE4,     /* 1: IPRB */
+        0xA4000016,     /* 2: IPRC */
+        0xA4000018,     /* 3: IPRD */
+        0xA400001A,     /* 4: IPRE */
+        0xA4080000,     /* 5: IPRF */
+        0xA4080002,     /* 6: IPRG */
+        0xA4080004,     /* 7: IPRH */
 };
 
-/* given the IPR index return the address of the IPR register */
-unsigned int map_ipridx_to_addr(int idx)
-{
-        if (idx >= ARRAY_SIZE(ipr_offsets))
-                return 0;
-        return ipr_offsets[idx];
-}
+static struct ipr_desc ipr_irq_desc = {
+        .ipr_offsets    = ipr_offsets,
+        .nr_offsets     = ARRAY_SIZE(ipr_offsets),
+
+        .ipr_data       = ipr_irq_table,
+        .nr_irqs        = ARRAY_SIZE(ipr_irq_table),
+
+        .chip = {
+                .name   = "IPR-sh7705",
+        },
+};
 
-void __init init_IRQ_ipr()
+void __init init_IRQ_ipr(void)
 {
-        make_ipr_irq(sh7705_ipr_map, ARRAY_SIZE(sh7705_ipr_map));
+        register_ipr_controller(&ipr_irq_desc);
 }