ARM: OMAP3+: PRM: register interrupt information from DT

Allow the PRM interrupt information to be picked up from device tree.
OMAP3 may use legacy boot and needs to be compatible with old dtbs
(without interrupt populated), for these, we use the value which is
pre-populated.

Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>

diff --git a/arch/arm/mach-omap2/prm3xxx.c b/arch/arm/mach-omap2/prm3xxx.c
index 2458be6fc67bd7ef0617aea4899164d1507077c0..e0088e0508f8a3681dca223710e9f4bc4175c6de 100644 (file)
--- a/arch/arm/mach-omap2/prm3xxx.c
+++ b/arch/arm/mach-omap2/prm3xxx.c
@@ -17,6 +17,7 @@
 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/irq.h>
+#include <linux/of_irq.h>
 
 #include "soc.h"
 #include "common.h"
@@ -649,6 +650,11 @@ int __init omap3xxx_prm_init(void)
        return prm_register(&omap3xxx_prm_ll_data);
 }
 
+static struct of_device_id omap3_prm_dt_match_table[] = {
+       { .compatible = "ti,omap3-prm" },
+       { }
+};
+
 static int omap3xxx_prm_late_init(void)
 {
        int ret;
@@ -656,6 +662,18 @@ static int omap3xxx_prm_late_init(void)
        if (!(prm_features & PRM_HAS_IO_WAKEUP))
                return 0;
 
+       if (of_have_populated_dt()) {
+               struct device_node *np;
+               int irq_num;
+
+               np = of_find_matching_node(NULL, omap3_prm_dt_match_table);
+               if (np) {
+                       irq_num = of_irq_get(np, 0);
+                       if (irq_num >= 0)
+                               omap3_prcm_irq_setup.irq = irq_num;
+               }
+       }
+
        omap3xxx_prm_enable_io_wakeup();
        ret = omap_prcm_register_chain_handler(&omap3_prcm_irq_setup);
        if (!ret)