OMAP hwmod: add names to module MPU IRQ lines

Replace the existing u8 array of module MPU IRQ lines with a struct
that includes a name - similar to the existing struct
omap_hwmod_dma_info.  Device drivers can then use
platform_get_resource_byname() to retrieve specific IRQs without nasty
dependencies on array ordering.

Thanks to Benoît Cousson <b-cousson@ti.com> and Kevin Hilman
<khilman@deeprootsystems.com> for feedback on this approach.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoît Cousson <b-cousson@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>

2 files changed, 19 insertions, 4 deletions

diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index b01da1ed822d..61d220c5d488 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -1386,8 +1386,9 @@ int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res)
         /* For each IRQ, DMA, memory area, fill in array.*/
 
         for (i = 0; i < oh->mpu_irqs_cnt; i++) {
-                (res + r)->start = *(oh->mpu_irqs + i);
-                (res + r)->end = *(oh->mpu_irqs + i);
+                (res + r)->name = (oh->mpu_irqs + i)->name;
+                (res + r)->start = (oh->mpu_irqs + i)->irq;
+                (res + r)->end = (oh->mpu_irqs + i)->irq;
                 (res + r)->flags = IORESOURCE_IRQ;
                 r++;
         }
diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h
index 643a9727de35..007935a921ea 100644
--- a/arch/arm/plat-omap/include/plat/omap_hwmod.h
+++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h
@@ -64,7 +64,21 @@ struct omap_device;
 
 
 /**
- * struct omap_hwmod_dma_info - MPU address space handled by the hwmod
+ * struct omap_hwmod_irq_info - MPU IRQs used by the hwmod
+ * @name: name of the IRQ channel (module local name)
+ * @irq_ch: IRQ channel ID
+ *
+ * @name should be something short, e.g., "tx" or "rx".  It is for use
+ * by platform_get_resource_byname().  It is defined locally to the
+ * hwmod.
+ */
+struct omap_hwmod_irq_info {
+        const char      *name;
+        u16             irq;
+};
+
+/**
+ * struct omap_hwmod_dma_info - DMA channels used by the hwmod
  * @name: name of the DMA channel (module local name)
  * @dma_ch: DMA channel ID
  *
@@ -379,7 +393,7 @@ struct omap_hwmod_omap4_prcm {
 struct omap_hwmod {
         const char                      *name;
         struct omap_device              *od;
-        u8                              *mpu_irqs;
+        struct omap_hwmod_irq_info      *mpu_irqs;
         struct omap_hwmod_dma_info      *sdma_chs;
         union {
                 struct omap_hwmod_omap2_prcm omap2;