irqchip: crossbar: Introduce ti, irqs-skip to skip irqs that bypass crossbar
When, in the system due to varied reasons, interrupts might be unusable
due to hardware behavior, but register maps do exist, then those interrupts
should be skipped while mapping irq to crossbars.
Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Sricharan R <r.sricharan@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Link: https://lkml.kernel.org/r/1403766634-18543-4-git-send-email-r.sricharan@ti.com
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
diff --git a/drivers/irqchip/irq-crossbar.c b/drivers/irqchip/irq-crossbar.c
index 51d4b87..0533a71 100644
--- a/drivers/irqchip/irq-crossbar.c
+++ b/drivers/irqchip/irq-crossbar.c
@@ -18,6 +18,7 @@
#define IRQ_FREE -1
#define IRQ_RESERVED -2
+#define IRQ_SKIP -3
#define GIC_IRQ_START 32
/*
@@ -160,6 +161,25 @@
}
}
+ /* Skip irqs hardwired to bypass the crossbar */
+ irqsr = of_get_property(node, "ti,irqs-skip", &size);
+ if (irqsr) {
+ size /= sizeof(__be32);
+
+ for (i = 0; i < size; i++) {
+ of_property_read_u32_index(node,
+ "ti,irqs-skip",
+ i, &entry);
+ if (entry > max) {
+ pr_err("Invalid skip entry\n");
+ ret = -EINVAL;
+ goto err3;
+ }
+ cb->irq_map[entry] = IRQ_SKIP;
+ }
+ }
+
+
cb->register_offsets = kzalloc(max * sizeof(int), GFP_KERNEL);
if (!cb->register_offsets)
goto err3;