[ARM] 3690/1: genirq: Introduce and make use of dummy irq chip
Patch from Thomas Gleixner
From: Thomas Gleixner <tglx@linutronix.de>
ARM has a couple of really dumb interrupt controllers.
Implement a generic one and fixup the ARM migration. ARM reused
the no_irq_chip for this purpose, but this does not work out
for platforms which are not converted to the new interrupt
type handling model.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 961b875..e71266c 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -96,6 +96,22 @@
};
/*
+ * Generic dummy implementation which can be used for
+ * real dumb interrupt sources
+ */
+struct irq_chip dummy_irq_chip = {
+ .name = "dummy",
+ .startup = noop_ret,
+ .shutdown = noop,
+ .enable = noop,
+ .disable = noop,
+ .ack = noop,
+ .mask = noop,
+ .unmask = noop,
+ .end = noop,
+};
+
+/*
* Special, empty irq handler:
*/
irqreturn_t no_action(int cpl, void *dev_id, struct pt_regs *regs)