ARM: mxs: select MULTI_IRQ_HANDLER

As part of multi-platform effort, let's enable MULTI_IRQ_HANDLER for
mach-mxs and remove entry-macro.S.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/Kconfig

@@ -489,6 +489,7 @@ config ARCH_MXS
 	select CLKSRC_MMIO
 	select COMMON_CLK
 	select HAVE_CLK_PREPARE
+	select MULTI_IRQ_HANDLER
 	select PINCTRL
 	select USE_OF
 	help

arch/arm/mach-mxs/icoll.c

@@ -20,13 +20,14 @@
 #include <linux/init.h>
 #include <linux/irq.h>
 #include <linux/io.h>
-
+#include <asm/exception.h>
 #include <mach/mxs.h>
 #include <mach/common.h>
 
 #define HW_ICOLL_VECTOR				0x0000
 #define HW_ICOLL_LEVELACK			0x0010
 #define HW_ICOLL_CTRL				0x0020
+#define HW_ICOLL_STAT_OFFSET			0x0070
 #define HW_ICOLL_INTERRUPTn_SET(n)		(0x0124 + (n) * 0x10)
 #define HW_ICOLL_INTERRUPTn_CLR(n)		(0x0128 + (n) * 0x10)
 #define BM_ICOLL_INTERRUPTn_ENABLE		0x00000004
@@ -63,6 +64,21 @@ static struct irq_chip mxs_icoll_chip = {
 	.irq_unmask = icoll_unmask_irq,
 };
 
+asmlinkage void __exception_irq_entry icoll_handle_irq(struct pt_regs *regs)
+{
+	u32 irqnr;
+
+	do {
+		irqnr = __raw_readl(icoll_base + HW_ICOLL_STAT_OFFSET);
+		if (irqnr != 0x7f) {
+			__raw_writel(irqnr, icoll_base + HW_ICOLL_VECTOR);
+			handle_IRQ(irqnr, regs);
+			continue;
+		}
+		break;
+	} while (1);
+}
+
 void __init icoll_init_irq(void)
 {
 	int i;

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

@@ -28,6 +28,7 @@ extern void mx28_map_io(void);
 extern void mx28_init_irq(void);
 
 extern void icoll_init_irq(void);
+extern void icoll_handle_irq(struct pt_regs *);
 
 extern struct platform_device *mxs_add_dma(const char *devid,
 						resource_size_t base);

arch/arm/mach-mxs/include/mach/entry-macro.S

@@ -1,35 +0,0 @@
-/*
- * Low-level IRQ helper macros for Freescale MXS-based
- *
- * Copyright (C) 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <mach/mxs.h>
-
-#define MXS_ICOLL_VBASE		MXS_IO_ADDRESS(MXS_ICOLL_BASE_ADDR)
-#define HW_ICOLL_STAT_OFFSET	0x70
-
-	.macro	get_irqnr_and_base, irqnr, irqstat, base, tmp
-	ldr	\irqnr, [\base, #HW_ICOLL_STAT_OFFSET]
-	cmp	\irqnr, #0x7F
-	strne	\irqnr, [\base]
-	moveqs	\irqnr, #0
-	.endm
-
-	.macro  get_irqnr_preamble, base, tmp
-	ldr	\base, =MXS_ICOLL_VBASE
-	.endm

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

@@ -294,6 +294,7 @@ static const char *imx28_dt_compat[] __initdata = {
 DT_MACHINE_START(IMX23, "Freescale i.MX23 (Device Tree)")
 	.map_io		= mx23_map_io,
 	.init_irq	= mxs_dt_init_irq,
+	.handle_irq	= icoll_handle_irq,
 	.timer		= &imx23_timer,
 	.init_machine	= mxs_machine_init,
 	.dt_compat	= imx23_dt_compat,
@@ -303,6 +304,7 @@ MACHINE_END
 DT_MACHINE_START(IMX28, "Freescale i.MX28 (Device Tree)")
 	.map_io		= mx28_map_io,
 	.init_irq	= mxs_dt_init_irq,
+	.handle_irq	= icoll_handle_irq,
 	.timer		= &imx28_timer,
 	.init_machine	= mxs_machine_init,
 	.dt_compat	= imx28_dt_compat,