ARM: imx5: tzic_init_irq() can directly be .init_irq hook

After i.MX51 supports DT only, tzic_init_irq() can figure out the
tzic_base on its own.  Thus, it can directly be .init_irq hook, and
mx51[53]_init_irq() can be saved.
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>

arch/arm/mach-imx/common.h

@@ -37,15 +37,13 @@ void imx35_init_early(void);
 void imx51_init_early(void);
 void imx53_init_early(void);
 void mxc_init_irq(void __iomem *);
-void tzic_init_irq(void __iomem *);
+void tzic_init_irq(void);
 void mx1_init_irq(void);
 void mx21_init_irq(void);
 void mx25_init_irq(void);
 void mx27_init_irq(void);
 void mx31_init_irq(void);
 void mx35_init_irq(void);
-void mx51_init_irq(void);
-void mx53_init_irq(void);
 void imx1_soc_init(void);
 void imx21_soc_init(void);
 void imx25_soc_init(void);

arch/arm/mach-imx/mach-imx50.c

@@ -30,7 +30,7 @@ static const char *imx50_dt_board_compat[] __initconst = {
 
 DT_MACHINE_START(IMX50_DT, "Freescale i.MX50 (Device Tree Support)")
 	.map_io		= mx53_map_io,
-	.init_irq	= mx53_init_irq,
+	.init_irq	= tzic_init_irq,
 	.init_machine	= imx50_dt_init,
 	.dt_compat	= imx50_dt_board_compat,
 	.restart	= mxc_restart,

arch/arm/mach-imx/mach-imx51.c

@@ -37,7 +37,7 @@ static const char *imx51_dt_board_compat[] __initconst = {
 DT_MACHINE_START(IMX51_DT, "Freescale i.MX51 (Device Tree Support)")
 	.map_io		= mx51_map_io,
 	.init_early	= imx51_init_early,
-	.init_irq	= mx51_init_irq,
+	.init_irq	= tzic_init_irq,
 	.init_machine	= imx51_dt_init,
 	.init_late	= imx51_init_late,
 	.dt_compat	= imx51_dt_board_compat,

arch/arm/mach-imx/mach-imx53.c

@@ -39,7 +39,7 @@ static const char *imx53_dt_board_compat[] __initconst = {
 DT_MACHINE_START(IMX53_DT, "Freescale i.MX53 (Device Tree Support)")
 	.map_io		= mx53_map_io,
 	.init_early	= imx53_init_early,
-	.init_irq	= mx53_init_irq,
+	.init_irq	= tzic_init_irq,
 	.init_machine	= imx53_dt_init,
 	.init_late	= imx53_init_late,
 	.dt_compat	= imx53_dt_board_compat,

arch/arm/mach-imx/mm-imx5.c

@@ -93,23 +93,6 @@ void __init imx53_init_early(void)
 	imx_src_init();
 }
 
-void __init mx51_init_irq(void)
-{
-	tzic_init_irq(MX51_IO_ADDRESS(MX51_TZIC_BASE_ADDR));
-}
-
-void __init mx53_init_irq(void)
-{
-	struct device_node *np;
-	void __iomem *base;
-
-	np = of_find_compatible_node(NULL, NULL, "fsl,imx53-tzic");
-	base = of_iomap(np, 0);
-	WARN_ON(!base);
-
-	tzic_init_irq(base);
-}
-
 static struct sdma_platform_data imx51_sdma_pdata __initdata = {
 	.fw_name = "sdma-imx51.bin",
 };

arch/arm/mach-imx/tzic.c

@@ -17,6 +17,7 @@
 #include <linux/io.h>
 #include <linux/irqdomain.h>
 #include <linux/of.h>
+#include <linux/of_address.h>
 
 #include <asm/mach/irq.h>
 #include <asm/exception.h>
@@ -153,13 +154,16 @@ static void __exception_irq_entry tzic_handle_irq(struct pt_regs *regs)
  * interrupts. It registers the interrupt enable and disable functions
  * to the kernel for each interrupt source.
  */
-void __init tzic_init_irq(void __iomem *irqbase)
+void __init tzic_init_irq(void)
 {
 	struct device_node *np;
 	int irq_base;
 	int i;
 
-	tzic_base = irqbase;
+	np = of_find_compatible_node(NULL, NULL, "fsl,tzic");
+	tzic_base = of_iomap(np, 0);
+	WARN_ON(!tzic_base);
+
 	/* put the TZIC into the reset value with
 	 * all interrupts disabled
 	 */
@@ -181,7 +185,6 @@ void __init tzic_init_irq(void __iomem *irqbase)
 	irq_base = irq_alloc_descs(-1, 0, TZIC_NUM_IRQS, numa_node_id());
 	WARN_ON(irq_base < 0);
 
-	np = of_find_compatible_node(NULL, NULL, "fsl,tzic");
 	domain = irq_domain_add_legacy(np, TZIC_NUM_IRQS, irq_base, 0,
 				       &irq_domain_simple_ops, NULL);
 	WARN_ON(!domain);