[PATCH v3 3/4] arm: mvebu: move irq controller driver to drivers/irqchip

[Thomas Petazzoni]

Now that the drivers/irqchip/ directory has a minimal infrastructure
to support the addition of irq controller driver, we move the irq
controller driver for Armada 370 and Armada XP ARM SoCs from the
arch/arm/mach-mvebu/ directory to the drivers/irqchip/ directory and
update the irqchip infrastructure to take into account this new
driver.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Reviewed-by: Stephen Warren <swarren at wwwdotorg.org>
Reviewed-by: Rob Herring <rob.herring at calxeda.com>
Cc: Jason Cooper <jason at lakedaemon.net>
Cc: Andrew Lunn <andrew at lunn.ch>
Cc: Gregory Clement <gregory.clement at free-electrons.com>
---
 arch/arm/mach-mvebu/Makefile                       |    2 +-
 arch/arm/mach-mvebu/armada-370-xp.c                |    4 ++--
 arch/arm/mach-mvebu/common.h                       |    3 ---
 drivers/irqchip/Makefile                           |    1 +
 .../irqchip}/irq-armada-370-xp.c                   |   25 +++++++++-----------
 drivers/irqchip/irqchip.c                          |    6 +++++
 drivers/irqchip/irqchip.h                          |    2 ++
 7 files changed, 23 insertions(+), 20 deletions(-)
 rename {arch/arm/mach-mvebu => drivers/irqchip}/irq-armada-370-xp.c (87%)

diff --git a/arch/arm/mach-mvebu/Makefile b/arch/arm/mach-mvebu/Makefile
index 57f996b..7f4e9f4 100644
--- a/arch/arm/mach-mvebu/Makefile
+++ b/arch/arm/mach-mvebu/Makefile
@@ -2,4 +2,4 @@ ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := -I$(srctree)/$(src)/include \
 	-I$(srctree)/arch/arm/plat-orion/include
 
 obj-y += system-controller.o
-obj-$(CONFIG_MACH_ARMADA_370_XP) += armada-370-xp.o irq-armada-370-xp.o addr-map.o
+obj-$(CONFIG_MACH_ARMADA_370_XP) += armada-370-xp.o addr-map.o
diff --git a/arch/arm/mach-mvebu/armada-370-xp.c b/arch/arm/mach-mvebu/armada-370-xp.c
index 3d6c540..8e94888 100644
--- a/arch/arm/mach-mvebu/armada-370-xp.c
+++ b/arch/arm/mach-mvebu/armada-370-xp.c
@@ -16,6 +16,7 @@
 #include <linux/init.h>
 #include <linux/of_platform.h>
 #include <linux/io.h>
+#include <linux/irqchip.h>
 #include <linux/time-armada-370-xp.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -57,8 +58,7 @@ static const char * const armada_370_xp_dt_board_dt_compat[] = {
 DT_MACHINE_START(ARMADA_XP_DT, "Marvell Aramada 370/XP (Device Tree)")
 	.init_machine	= armada_370_xp_dt_init,
 	.map_io		= armada_370_xp_map_io,
-	.init_irq	= armada_370_xp_init_irq,
-	.handle_irq     = armada_370_xp_handle_irq,
+	.init_irq	= irqchip_init,
 	.timer		= &armada_370_xp_timer,
 	.restart	= mvebu_restart,
 	.dt_compat	= armada_370_xp_dt_board_dt_compat,
diff --git a/arch/arm/mach-mvebu/common.h b/arch/arm/mach-mvebu/common.h
index 02f89ea..f0eaa21 100644
--- a/arch/arm/mach-mvebu/common.h
+++ b/arch/arm/mach-mvebu/common.h
@@ -17,7 +17,4 @@
 
 void mvebu_restart(char mode, const char *cmd);
 
-void armada_370_xp_init_irq(void);
-void armada_370_xp_handle_irq(struct pt_regs *regs);
-
 #endif
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index 6b5a6e0..5148ffd 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -1,2 +1,3 @@
 obj-$(CONFIG_IRQCHIP) += irqchip.o
 obj-$(CONFIG_ARCH_BCM2835) += irq-bcm2835.o
+obj-$(CONFIG_ARCH_MVEBU)   += irq-armada-370-xp.o
diff --git a/arch/arm/mach-mvebu/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c
similarity index 87%
rename from arch/arm/mach-mvebu/irq-armada-370-xp.c
rename to drivers/irqchip/irq-armada-370-xp.c
index 5f5f939..140c6b3 100644
--- a/arch/arm/mach-mvebu/irq-armada-370-xp.c
+++ b/drivers/irqchip/irq-armada-370-xp.c
@@ -23,6 +23,7 @@
 #include <linux/of_irq.h>
 #include <linux/irqdomain.h>
 #include <asm/mach/arch.h>
+#include <asm/mach/irq.h>
 #include <asm/exception.h>
 
 /* Interrupt Controller Registers Map */
@@ -77,8 +78,11 @@ static struct irq_domain_ops armada_370_xp_mpic_irq_ops = {
 	.xlate = irq_domain_xlate_onecell,
 };
 
-static int __init armada_370_xp_mpic_of_init(struct device_node *node,
-					     struct device_node *parent)
+static asmlinkage void
+armada_370_xp_handle_irq(struct pt_regs *regs);
+
+int __init armada_370_xp_mpic_of_init(struct device_node *node,
+				      struct device_node *parent)
 {
 	u32 control;
 
@@ -98,11 +102,14 @@ static int __init armada_370_xp_mpic_of_init(struct device_node *node,
 		panic("Unable to add Armada_370_Xp MPIC irq domain (DT)\n");
 
 	irq_set_default_host(armada_370_xp_mpic_domain);
+
+	handle_arch_irq = armada_370_xp_handle_irq;
+
 	return 0;
 }
 
-asmlinkage void __exception_irq_entry armada_370_xp_handle_irq(struct pt_regs
-							       *regs)
+static asmlinkage void __exception_irq_entry
+armada_370_xp_handle_irq(struct pt_regs *regs)
 {
 	u32 irqstat, irqnr;
 
@@ -121,13 +128,3 @@ asmlinkage void __exception_irq_entry armada_370_xp_handle_irq(struct pt_regs
 		break;
 	} while (1);
 }
-
-static const struct of_device_id mpic_of_match[] __initconst = {
-	{.compatible = "marvell,mpic", .data = armada_370_xp_mpic_of_init},
-	{},
-};
-
-void __init armada_370_xp_init_irq(void)
-{
-	of_irq_init(mpic_of_match);
-}
diff --git a/drivers/irqchip/irqchip.c b/drivers/irqchip/irqchip.c
index e2496e4..f36d423 100644
--- a/drivers/irqchip/irqchip.c
+++ b/drivers/irqchip/irqchip.c
@@ -20,6 +20,12 @@ static const struct of_device_id irqchip_of_match[] __initconst = {
 		.data = bcm2835_irqchip_init,
 	},
 #endif
+#ifdef CONFIG_ARCH_MVEBU
+	{
+		.compatible = "marvell,mpic",
+		.data = armada_370_xp_mpic_of_init,
+	},
+#endif
 	{},
 };
 
diff --git a/drivers/irqchip/irqchip.h b/drivers/irqchip/irqchip.h
index 1075537..0a0d7af 100644
--- a/drivers/irqchip/irqchip.h
+++ b/drivers/irqchip/irqchip.h
@@ -12,5 +12,7 @@
 #define _IRQCHIP_H
 
 int bcm2835_irqchip_init(struct device_node *node, struct device_node *parent);
+int armada_370_xp_mpic_of_init(struct device_node *node,
+			       struct device_node *parent);
 
 #endif
-- 
1.7.9.5