irqchip: move IRQ driver for Armada 370/XP

When the Marvell Armada 370/XP support was included in the kernel, the
drivers/irqchip/ directory didn't exist and the minimal infrastructure
in it also didn't exist. Now that we have those things in place, we
move the Armada 370/XP IRQ controller driver from
arch/arm/mach-mvebu/irq-armada-370-xp.c to
drivers/irqchip/irq-armada-370-xp.c.

Note in order to reduce code movement and therefore ease the review of
this patch, we intentionally introduce a forward declaration of
armada_370_xp_handle_irq(). It is in fact not needed because this
handler can now simply be implemented before
armada_370_xp_mpic_of_init(). That will be done in the next commit.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

4 files changed, 15 insertions, 14 deletions

diff --git a/arch/arm/mach-mvebu/Makefile b/arch/arm/mach-mvebu/Makefile
index da93bcbc74c1..c3be068f1c96 100644
--- a/arch/arm/mach-mvebu/Makefile
+++ b/arch/arm/mach-mvebu/Makefile
@@ -5,6 +5,6 @@ AFLAGS_coherency_ll.o		:= -Wa,-march=armv7-a
 
 obj-y                            += system-controller.o
 obj-$(CONFIG_MACH_ARMADA_370_XP) += armada-370-xp.o
-obj-$(CONFIG_ARCH_MVEBU)         += addr-map.o coherency.o coherency_ll.o pmsu.o irq-armada-370-xp.o 
+obj-$(CONFIG_ARCH_MVEBU)         += addr-map.o coherency.o coherency_ll.o pmsu.o
 obj-$(CONFIG_SMP)                += platsmp.o headsmp.o
 obj-$(CONFIG_HOTPLUG_CPU)        += hotplug.o
diff --git a/arch/arm/mach-mvebu/armada-370-xp.c b/arch/arm/mach-mvebu/armada-370-xp.c
index c1bbfa74e646..433e8c5343b2 100644
--- a/arch/arm/mach-mvebu/armada-370-xp.c
+++ b/arch/arm/mach-mvebu/armada-370-xp.c
@@ -19,6 +19,7 @@
 #include <linux/time-armada-370-xp.h>
 #include <linux/clk/mvebu.h>
 #include <linux/dma-mapping.h>
+#include <linux/irqchip.h>
 #include <asm/hardware/cache-l2x0.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -77,8 +78,7 @@ DT_MACHINE_START(ARMADA_XP_DT, "Marvell Armada 370/XP (Device Tree)")
         .init_machine   = armada_370_xp_dt_init,
         .map_io         = armada_370_xp_map_io,
         .init_early     = armada_370_xp_init_early,
-        .init_irq       = armada_370_xp_init_irq,
-        .handle_irq     = armada_370_xp_handle_irq,
+        .init_irq       = irqchip_init,
         .init_time      = armada_370_xp_timer_and_clk_init,
         .restart        = mvebu_restart,
         .dt_compat      = armada_370_xp_dt_compat,
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index 98e3b87bdf1b..dae27a77c1e1 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -2,6 +2,7 @@ obj-$(CONFIG_IRQCHIP)			+= irqchip.o
 
 obj-$(CONFIG_ARCH_BCM2835)              += irq-bcm2835.o
 obj-$(CONFIG_ARCH_EXYNOS)               += exynos-combiner.o
+obj-$(CONFIG_ARCH_MVEBU)                += irq-armada-370-xp.o
 obj-$(CONFIG_METAG)                     += irq-metag-ext.o
 obj-$(CONFIG_METAG_PERFCOUNTER_IRQS)    += irq-metag.o
 obj-$(CONFIG_ARCH_SUNXI)                += irq-sunxi.o
diff --git a/arch/arm/mach-mvebu/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c
index f6699f303e6d..d20a832ba86b 100644
--- a/arch/arm/mach-mvebu/irq-armada-370-xp.c
+++ b/drivers/irqchip/irq-armada-370-xp.c
@@ -25,6 +25,9 @@
 #include <asm/mach/arch.h>
 #include <asm/exception.h>
 #include <asm/smp_plat.h>
+#include <asm/mach/irq.h>
+
+#include "irqchip.h"
 
 /* Interrupt Controller Registers Map */
 #define ARMADA_370_XP_INT_SET_MASK_OFFS         (0x48)
@@ -202,6 +205,9 @@ static struct irq_domain_ops armada_370_xp_mpic_irq_ops = {
         .xlate = irq_domain_xlate_onecell,
 };
 
+static asmlinkage void __exception_irq_entry
+armada_370_xp_handle_irq(struct pt_regs *regs);
+
 static int __init armada_370_xp_mpic_of_init(struct device_node *node,
                                              struct device_node *parent)
 {
@@ -237,11 +243,13 @@ static int __init armada_370_xp_mpic_of_init(struct device_node *node,
 
 #endif
 
+        set_handle_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;
 
@@ -283,12 +291,4 @@ asmlinkage void __exception_irq_entry armada_370_xp_handle_irq(struct pt_regs
         } 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);
-}
+IRQCHIP_DECLARE(armada_370_xp_mpic, "marvell,mpic", armada_370_xp_mpic_of_init);