ARM: mxs: move icoll driver into drivers/irqchip

Move icoll.c into drivers/irqchip as irq-mxs.c, and along with the
renaming, change the driver to use IRQCHIP_DECLARE.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/mach-mxs/Makefile

 # Common support
-obj-y := icoll.o ocotp.o system.o mm.o
+obj-y := ocotp.o system.o mm.o
 
 obj-$(CONFIG_PM) += pm.o
 

arch/arm/mach-mxs/include/mach/common.h

@@ -22,7 +22,4 @@ extern void mx23_map_io(void);
 extern int mx28_clocks_init(void);
 extern void mx28_map_io(void);
 
-extern void icoll_init_irq(void);
-extern void icoll_handle_irq(struct pt_regs *);
-
 #endif /* __MACH_MXS_COMMON_H__ */

arch/arm/mach-mxs/mach-mxs.c

@@ -18,6 +18,8 @@
 #include <linux/err.h>
 #include <linux/gpio.h>
 #include <linux/init.h>
+#include <linux/irqchip.h>
+#include <linux/irqchip/mxs.h>
 #include <linux/micrel_phy.h>
 #include <linux/mxsfb.h>
 #include <linux/of_platform.h>
@@ -469,7 +471,7 @@ static const char *imx28_dt_compat[] __initdata = {
 
 DT_MACHINE_START(IMX23, "Freescale i.MX23 (Device Tree)")
 	.map_io		= mx23_map_io,
-	.init_irq	= icoll_init_irq,
+	.init_irq	= irqchip_init,
 	.handle_irq	= icoll_handle_irq,
 	.init_time	= imx23_timer_init,
 	.init_machine	= mxs_machine_init,
@@ -479,7 +481,7 @@ MACHINE_END
 
 DT_MACHINE_START(IMX28, "Freescale i.MX28 (Device Tree)")
 	.map_io		= mx28_map_io,
-	.init_irq	= icoll_init_irq,
+	.init_irq	= irqchip_init,
 	.handle_irq	= icoll_handle_irq,
 	.init_time	= imx28_timer_init,
 	.init_machine	= mxs_machine_init,

drivers/irqchip/Makefile

@@ -2,6 +2,7 @@ obj-$(CONFIG_IRQCHIP)			+= irqchip.o
 
 obj-$(CONFIG_ARCH_BCM2835)		+= irq-bcm2835.o
 obj-$(CONFIG_ARCH_EXYNOS)		+= exynos-combiner.o
+obj-$(CONFIG_ARCH_MXS)			+= irq-mxs.o
 obj-$(CONFIG_METAG)			+= irq-metag-ext.o
 obj-$(CONFIG_METAG_PERFCOUNTER_IRQS)	+= irq-metag.o
 obj-$(CONFIG_ARCH_SUNXI)		+= irq-sunxi.o

arch/arm/mach-mxs/icoll.c → drivers/irqchip/irq-mxs.c

@@ -27,6 +27,8 @@
 #include <linux/stmp_device.h>
 #include <asm/exception.h>
 
+#include "irqchip.h"
+
 #define HW_ICOLL_VECTOR				0x0000
 #define HW_ICOLL_LEVELACK			0x0010
 #define HW_ICOLL_CTRL				0x0020
@@ -116,13 +118,4 @@ static void __init icoll_of_init(struct device_node *np,
 					     &icoll_irq_domain_ops, NULL);
 	WARN_ON(!icoll_domain);
 }
-
-static const struct of_device_id icoll_of_match[] __initconst = {
-	{.compatible = "fsl,icoll", .data = icoll_of_init},
-	{ /* sentinel */ }
-};
-
-void __init icoll_init_irq(void)
-{
-	of_irq_init(icoll_of_match);
-}
+IRQCHIP_DECLARE(mxs, "fsl,icoll", icoll_of_init);

include/linux/irqchip/mxs.h

+/*
+ * Copyright (C) 2013 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __LINUX_IRQCHIP_MXS_H
+#define __LINUX_IRQCHIP_MXS_H
+
+extern void icoll_handle_irq(struct pt_regs *);
+
+#endif