[PATCH 2/4] irqchip: Add IRQCHIP_DECLARE_DRIVER macro

[Andrey Smirnov <andrew.smirnov@gmail.com>]

Add IRQCHIP_DECLARE_DRIVER macro to allow having driver code that both
registers irqchip and a platform driver. Based on analogous code of
CLK_OF_DECLARE_DRIVER.

Cc: yurovsky@gmail.com
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 include/linux/irqchip.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/include/linux/irqchip.h b/include/linux/irqchip.h
index 89c34b2..611e8cc 100644
--- a/include/linux/irqchip.h
+++ b/include/linux/irqchip.h
@@ -27,6 +27,22 @@
 #define IRQCHIP_DECLARE(name, compat, fn) OF_DECLARE_2(irqchip, name, compat, fn)
 
 /*
+ * Use this macro when you have a driver that requires two
+ * initialization routines, one at IRQCHIP_DECLARE, and one at
+ * platform device probe
+ */
+#define IRQCHIP_DECLARE_DRIVER(name, compat, fn)			\
+	static int __init						\
+	name##_of_irqchip_init_driver(struct device_node *np,		\
+				      struct device_node *parent)	\
+	{								\
+		of_node_clear_flag(np, OF_POPULATED);			\
+		return fn(np, parent);					\
+	}								\
+	OF_DECLARE_2(irqchip, name, compat, name##_of_irqchip_init_driver)
+
+
+/*
  * This macro must be used by the different irqchip drivers to declare
  * the association between their version and their initialization function.
  *
-- 
2.9.3