From 746140c71d537560bbd22c1b148fb21031c30e71 Mon Sep 17 00:00:00 2001
From: Kevin Hilman <khilman@mvista.com>
Date: Fri, 22 Sep 2006 00:16:30 +0100
Subject: [PATCH] [ARM] 3855/1: Add generic time support

This patch adds Generic time-of-day support for the ARM architecture.

The support is currently added using #ifdef's so that it can support
sub-arches that do not (yet) have a clocksource added.  As sub-arches
add clocksource support, they should 'select GENERIC_TIME'

Signed-off-by: Deepak Saxena <dsaxena@mvista.com>
Signed-off-by: Daniel Walker <dwalker@mvista.com>

Signed-off-by: Kevin Hilman <khilman@mvista.com>

Acked-by: John Stultz <johnstul@us.ibm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 arch/arm/Kconfig            | 4 ++++
 arch/arm/kernel/time.c      | 6 ++++++
 include/asm-arm/mach/time.h | 2 ++
 include/asm-arm/timeofday.h | 4 ++++
 4 files changed, 16 insertions(+)
 create mode 100644 include/asm-arm/timeofday.h

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 0810d27c039..314ac6ba0ec 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -17,6 +17,10 @@ config ARM
 	  Europe.  There is an ARM Linux project with a web page at
 	  <http://www.arm.linux.org.uk/>.
 
+config GENERIC_TIME
+	bool
+	default n
+
 config MMU
 	bool
 	default y
diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c
index 09a67d77185..d4dceb5f06e 100644
--- a/arch/arm/kernel/time.c
+++ b/arch/arm/kernel/time.c
@@ -69,10 +69,12 @@ EXPORT_SYMBOL(profile_pc);
  */
 int (*set_rtc)(void);
 
+#ifndef CONFIG_GENERIC_TIME
 static unsigned long dummy_gettimeoffset(void)
 {
 	return 0;
 }
+#endif
 
 /*
  * Scheduler clock - returns current time in nanosec units.
@@ -230,6 +232,7 @@ static inline void do_leds(void)
 #define	do_leds()
 #endif
 
+#ifndef CONFIG_GENERIC_TIME
 void do_gettimeofday(struct timeval *tv)
 {
 	unsigned long flags;
@@ -291,6 +294,7 @@ int do_settimeofday(struct timespec *tv)
 }
 
 EXPORT_SYMBOL(do_settimeofday);
+#endif /* !CONFIG_GENERIC_TIME */
 
 /**
  * save_time_delta - Save the offset between system time and RTC time
@@ -500,8 +504,10 @@ device_initcall(timer_init_sysfs);
 
 void __init time_init(void)
 {
+#ifndef CONFIG_GENERIC_TIME
 	if (system_timer->offset == NULL)
 		system_timer->offset = dummy_gettimeoffset;
+#endif
 	system_timer->init();
 
 #ifdef CONFIG_NO_IDLE_HZ
diff --git a/include/asm-arm/mach/time.h b/include/asm-arm/mach/time.h
index dee0bc336fe..1eb93f5c0d6 100644
--- a/include/asm-arm/mach/time.h
+++ b/include/asm-arm/mach/time.h
@@ -38,7 +38,9 @@ struct sys_timer {
 	void			(*init)(void);
 	void			(*suspend)(void);
 	void			(*resume)(void);
+#ifndef CONFIG_GENERIC_TIME
 	unsigned long		(*offset)(void);
+#endif
 
 #ifdef CONFIG_NO_IDLE_HZ
 	struct dyn_tick_timer	*dyn_tick;
diff --git a/include/asm-arm/timeofday.h b/include/asm-arm/timeofday.h
new file mode 100644
index 00000000000..27254bd5b94
--- /dev/null
+++ b/include/asm-arm/timeofday.h
@@ -0,0 +1,4 @@
+#ifndef _ASM_ARM_TIMEOFDAY_H
+#define _ASM_ARM_TIMEOFDAY_H
+#include <asm-generic/timeofday.h>
+#endif
-- 
2.41.0