ARM: clps711x: consolidate irq/mm/time code into a single file

The separate files for clps711x which contain maybe one or two data
structures or functions is an inefficient use of files, and encourages
further small files as other changes happen.  Collapse down these into
a single core.c file.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-clps711x/Makefile

@@ -4,7 +4,7 @@
 
 # Object file lists.
 
-obj-y			:= irq.o mm.o time.o
+obj-y			:= common.o
 obj-m			:=
 obj-n			:=
 obj-			:=

arch/arm/mach-clps711x/irq.c → arch/arm/mach-clps711x/common.c

@@ -1,7 +1,9 @@
 /*
- *  linux/arch/arm/mach-clps711x/irq.c
+ *  linux/arch/arm/mach-clps711x/core.c
  *
- *  Copyright (C) 2000 Deep Blue Solutions Ltd.
+ *  Core support for the CLPS711x-based machines.
+ *
+ *  Copyright (C) 2001,2011 Deep Blue Solutions Ltd
  *
  * 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
@@ -17,16 +19,42 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
+#include <linux/kernel.h>
+#include <linux/mm.h>
 #include <linux/init.h>
-#include <linux/list.h>
+#include <linux/interrupt.h>
 #include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/sched.h>
+#include <linux/timex.h>
 
-#include <asm/mach/irq.h>
+#include <asm/sizes.h>
 #include <mach/hardware.h>
 #include <asm/irq.h>
-
+#include <asm/leds.h>
+#include <asm/pgtable.h>
+#include <asm/page.h>
+#include <asm/mach/map.h>
+#include <asm/mach/time.h>
 #include <asm/hardware/clps7111.h>
 
+/*
+ * This maps the generic CLPS711x registers
+ */
+static struct map_desc clps711x_io_desc[] __initdata = {
+	{
+		.virtual	= CLPS7111_VIRT_BASE,
+		.pfn		= __phys_to_pfn(CLPS7111_PHYS_BASE),
+		.length		= SZ_1M,
+		.type		= MT_DEVICE
+	}
+};
+
+void __init clps711x_map_io(void)
+{
+	iotable_init(clps711x_io_desc, ARRAY_SIZE(clps711x_io_desc));
+}
+
 static void int1_mask(struct irq_data *d)
 {
 	u32 intmr1;
@@ -112,15 +140,15 @@ void __init clps711x_init_irq(void)
 
 	for (i = 0; i < NR_IRQS; i++) {
 	        if (INT1_IRQS & (1 << i)) {
-	        	irq_set_chip_and_handler(i, &int1_chip,
+			irq_set_chip_and_handler(i, &int1_chip,
 						 handle_level_irq);
-	        	set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
+			set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
 		}
 		if (INT2_IRQS & (1 << i)) {
 			irq_set_chip_and_handler(i, &int2_chip,
 						 handle_level_irq);
 			set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
-		}			
+		}
 	}
 
 	/*
@@ -141,3 +169,54 @@ void __init clps711x_init_irq(void)
 	clps_writel(0, SYNCIO);
 	clps_writel(0, KBDEOI);
 }
+
+/*
+ * gettimeoffset() returns time since last timer tick, in usecs.
+ *
+ * 'LATCH' is hwclock ticks (see CLOCK_TICK_RATE in timex.h) per jiffy.
+ * 'tick' is usecs per jiffy.
+ */
+static unsigned long clps711x_gettimeoffset(void)
+{
+	unsigned long hwticks;
+	hwticks = LATCH - (clps_readl(TC2D) & 0xffff);	/* since last underflow */
+	return (hwticks * (tick_nsec / 1000)) / LATCH;
+}
+
+/*
+ * IRQ handler for the timer
+ */
+static irqreturn_t p720t_timer_interrupt(int irq, void *dev_id)
+{
+	timer_tick();
+	return IRQ_HANDLED;
+}
+
+static struct irqaction clps711x_timer_irq = {
+	.name		= "CLPS711x Timer Tick",
+	.flags		= IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
+	.handler	= p720t_timer_interrupt,
+};
+
+static void __init clps711x_timer_init(void)
+{
+	struct timespec tv;
+	unsigned int syscon;
+
+	syscon = clps_readl(SYSCON1);
+	syscon |= SYSCON1_TC2S | SYSCON1_TC2M;
+	clps_writel(syscon, SYSCON1);
+
+	clps_writel(LATCH-1, TC2D); /* 512kHz / 100Hz - 1 */
+
+	setup_irq(IRQ_TC2OI, &clps711x_timer_irq);
+
+	tv.tv_nsec = 0;
+	tv.tv_sec = clps_readl(RTCDR);
+	do_settimeofday(&tv);
+}
+
+struct sys_timer clps711x_timer = {
+	.init		= clps711x_timer_init,
+	.offset		= clps711x_gettimeoffset,
+};