[PATCHv3 4/4] ARM: OMAP3+: add prcm chain interrupts to the interrupt list

[Tero Kristo <t-kristo@ti.com>]

Currently PRCM chain handler for OMAP4 requires SPARSE_IRQ to be enabled
from kernel config, however enabling this option breaks the OMAP kernel
completely and it can't be used. Thus, OMAP_PRCM_IRQ_BASE was added
to the end of the irq list, and the prm_common code was changed to use
this instead of irq_desc allocation scheme.

Once SPARSE_IRQ is enabled for OMAP kernel, this patch can be reverted.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
---
 arch/arm/mach-omap2/prm_common.c       |   14 +-------------
 arch/arm/plat-omap/include/plat/irqs.h |    6 +++++-
 2 files changed, 6 insertions(+), 14 deletions(-)

diff --git a/arch/arm/mach-omap2/prm_common.c b/arch/arm/mach-omap2/prm_common.c
index 860118a..9ca829f 100644
--- a/arch/arm/mach-omap2/prm_common.c
+++ b/arch/arm/mach-omap2/prm_common.c
@@ -196,11 +196,6 @@ void omap_prcm_irq_cleanup(void)
 	prcm_irq_setup->priority_mask = NULL;
 
 	irq_set_chained_handler(prcm_irq_setup->irq, NULL);
-
-	if (prcm_irq_setup->base_irq > 0)
-		irq_free_descs(prcm_irq_setup->base_irq,
-			prcm_irq_setup->nr_regs * 32);
-	prcm_irq_setup->base_irq = 0;
 }
 
 void omap_prcm_irq_prepare(void)
@@ -282,14 +277,7 @@ int omap_prcm_register_chain_handler(struct omap_prcm_irq_setup *irq_setup)
 
 	irq_set_chained_handler(irq_setup->irq, omap_prcm_irq_handler);
 
-	irq_setup->base_irq = irq_alloc_descs(-1, 0, irq_setup->nr_regs * 32,
-		0);
-
-	if (irq_setup->base_irq < 0) {
-		pr_err("PRCM: failed to allocate irq descs: %d\n",
-			irq_setup->base_irq);
-		goto err;
-	}
+	irq_setup->base_irq = OMAP_PRCM_IRQ_BASE;
 
 	for (i = 0; i <= irq_setup->nr_regs; i++) {
 		gc = irq_alloc_generic_chip("PRCM", 1,
diff --git a/arch/arm/plat-omap/include/plat/irqs.h b/arch/arm/plat-omap/include/plat/irqs.h
index 2efd645..fe1be1d 100644
--- a/arch/arm/plat-omap/include/plat/irqs.h
+++ b/arch/arm/plat-omap/include/plat/irqs.h
@@ -428,8 +428,12 @@
 #define OMAP_GPMC_NR_IRQS	8
 #define OMAP_GPMC_IRQ_END	(OMAP_GPMC_IRQ_BASE + OMAP_GPMC_NR_IRQS)
 
+/* PRCM chain handler */
+#define OMAP_PRCM_IRQ_BASE	(OMAP_GPMC_IRQ_END)
+#define OMAP_PRCM_NR_IRQS	64
+#define OMAP_PRCM_IRQ_END	(OMAP_PRCM_IRQ_BASE + OMAP_PRCM_NR_IRQS)
 
-#define NR_IRQS			OMAP_GPMC_IRQ_END
+#define NR_IRQS			OMAP_PRCM_IRQ_END
 
 #define OMAP_IRQ_BIT(irq)	(1 << ((irq) % 32))
 
-- 
1.7.4.1