sh: hd6446x: Convert to sparseirq.

Follows the se7724 change and converts the hd64461 IRQ handling to
sparseirq.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

2 files changed, 20 insertions, 3 deletions

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 0f023bb62f99..9e565d962dc0 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -731,7 +731,7 @@ config GUSA_RB
 config SPARSE_IRQ
         def_bool y
         depends on SUPERH32 && !SH_DREAMCAST && !SH_HIGHLANDER && \
-                   !SH_RTS7751R2D && !HD64461
+                   !SH_RTS7751R2D
         help
           This enables support for sparse irqs. This is useful in general
           as most CPUs have a fairly sparse array of IRQ vectors, which
diff --git a/arch/sh/cchips/hd6446x/hd64461.c b/arch/sh/cchips/hd6446x/hd64461.c
index cbfedfb42e04..b447091fc064 100644
--- a/arch/sh/cchips/hd6446x/hd64461.c
+++ b/arch/sh/cchips/hd6446x/hd64461.c
@@ -73,7 +73,7 @@ static void hd64461_irq_demux(unsigned int irq, struct irq_desc *desc)
 
 int __init setup_hd64461(void)
 {
-        int i;
+        int i, nid = cpu_to_node(boot_cpu_data);
 
         if (!MACH_HD64461)
                 return 0;
@@ -90,9 +90,26 @@ int __init setup_hd64461(void)
         __raw_writew(0xffff, HD64461_NIMR);
 
         /*  IRQ 80 -> 95 belongs to HD64461  */
-        for (i = HD64461_IRQBASE; i < HD64461_IRQBASE + 16; i++)
+        for (i = HD64461_IRQBASE; i < HD64461_IRQBASE + 16; i++) {
+                unsigned int irq;
+
+                irq = create_irq_nr(i, nid);
+                if (unlikely(irq == 0)) {
+                        pr_err("%s: failed hooking irq %d for HD64461\n",
+                               __func__, i);
+                        return -EBUSY;
+                }
+
+                if (unlikely(irq != i)) {
+                        pr_err("%s: got irq %d but wanted %d, bailing.\n",
+                               __func__, irq, i);
+                        destroy_irq(irq);
+                        return -EINVAL;
+                }
+
                 set_irq_chip_and_handler(i, &hd64461_irq_chip,
                                          handle_level_irq);
+        }
 
         set_irq_chained_handler(CONFIG_HD64461_IRQ, hd64461_irq_demux);
         set_irq_type(CONFIG_HD64461_IRQ, IRQ_TYPE_LEVEL_LOW);