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, 6 deletions

diff --git a/arch/sh/boards/snapgear/setup.c b/arch/sh/boards/snapgear/setup.c
index b40124c092f..84271d85a8d 100644
--- a/arch/sh/boards/snapgear/setup.c
+++ b/arch/sh/boards/snapgear/setup.c
@@ -68,11 +68,27 @@ module_init(eraseconfig_init);
  * IRL3 = crypto
  */
 
-static struct ipr_data snapgear_ipr_map[] = {
-        make_ipr_irq(IRL0_IRQ, IRL0_IPR_ADDR, IRL0_IPR_POS, IRL0_PRIORITY);
-        make_ipr_irq(IRL1_IRQ, IRL1_IPR_ADDR, IRL1_IPR_POS, IRL1_PRIORITY);
-        make_ipr_irq(IRL2_IRQ, IRL2_IPR_ADDR, IRL2_IPR_POS, IRL2_PRIORITY);
-        make_ipr_irq(IRL3_IRQ, IRL3_IPR_ADDR, IRL3_IPR_POS, IRL3_PRIORITY);
+static struct ipr_data ipr_irq_table[] = {
+        { IRL0_IRQ, 0, IRL0_IPR_POS, IRL0_PRIORITY },
+        { IRL1_IRQ, 0, IRL1_IPR_POS, IRL1_PRIORITY },
+        { IRL2_IRQ, 0, IRL2_IPR_POS, IRL2_PRIORITY },
+        { IRL3_IRQ, 0, IRL3_IPR_POS, IRL3_PRIORITY },
+};
+
+static unsigned long ipr_offsets[] = {
+        INTC_IPRD,
+};
+
+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-snapgear",
+        },
 };
 
 static void __init init_snapgear_IRQ(void)
@@ -82,7 +98,7 @@ static void __init init_snapgear_IRQ(void)
 
         printk("Setup SnapGear IRQ/IPR ...\n");
 
-        make_ipr_irq(snapgear_ipr_map, ARRAY_SIZE(snapgear_ipr_map));
+        register_ipr_controller(&ipr_irq_desc);
 }
 
 /*