ARM: S5P: HRT support

This patch adds support HR-Timer(High Resolution Timer) and dynamic
tick system for S5P SoCs. There are many clock sources for HR-Timer
on S5P SoCs. The PWM timer, RTC, System Timer, and MCT can be used
for clock source.
This patch can only support PWM timer for clock source of S5P64X0
and S5PV210.
Signed-off-by: Sangbeom Kim <sbkim73@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/plat-s5p/Makefile

@@ -22,6 +22,7 @@ obj-$(CONFIG_S5P_GPIO_INT)	+= irq-gpioint.o
 obj-$(CONFIG_S5P_SYSTEM_MMU)	+= sysmmu.o
 obj-$(CONFIG_PM)		+= pm.o
 obj-$(CONFIG_PM)		+= irq-pm.o
+obj-$(CONFIG_S5P_HRT) 		+= s5p-time.o
 
 # devices
 

arch/arm/plat-s5p/include/plat/s5p-time.h

+/* linux/arch/arm/plat-s5p/include/plat/s5p-time.h
+ *
+ * Copyright 2011 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com/
+ *
+ * Header file for s5p time support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#ifndef __ASM_PLAT_S5P_TIME_H
+#define __ASM_PLAT_S5P_TIME_H __FILE__
+
+/* S5P HR-Timer Clock mode */
+enum s5p_timer_mode {
+	S5P_PWM0,
+	S5P_PWM1,
+	S5P_PWM2,
+	S5P_PWM3,
+	S5P_PWM4,
+};
+
+struct s5p_timer_source {
+	unsigned int event_id;
+	unsigned int source_id;
+};
+
+/* Be able to sleep for atleast 4 seconds (usually more) */
+#define S5PTIMER_MIN_RANGE	4
+
+#define TCNT_MAX		0xffffffff
+#define NON_PERIODIC		0
+#define PERIODIC		1
+
+extern void __init s5p_set_timer_source(enum s5p_timer_mode event,
+					enum s5p_timer_mode source);
+extern	struct sys_timer s5p_timer;
+#endif /* __ASM_PLAT_S5P_TIME_H */