Commit 45882145 authored by Paul Mundt's avatar Paul Mundt Committed by Paul Mundt
Browse files

sh: First step at generic timeofday support. 



At the moment we wrap GENERIC_TIME around our existing timer API.
As boards start providing their own clocksources, they're able to
select GENERIC_TIME accordingly and optimize out most of the timer
API.

Once the current timers have been reworked as proper clocksource
drivers, the rest of the place holders for the timer API can go
away and we can flip on GENERIC_TIME unconditionally.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent 49f19ce4

arch/sh/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -45,6 +45,9 @@ config GENERIC_CALIBRATE_DELAY 
config GENERIC_IOMAP

	bool



config GENERIC_TIME

	def_bool n



config ARCH_MAY_HAVE_PC_FDC

	bool
@@ -357,6 +360,7 @@ config CPU_HAS_SR_RB 
endmenu



menu "Timer support"

depends on !GENERIC_TIME



config SH_TMU

	bool "TMU timer support"

arch/sh/kernel/time.c

+2 −0
Original line number Diff line number Diff line
@@ -47,6 +47,7 @@ unsigned long long __attribute__ ((weak)) sched_clock(void) 
	return (unsigned long long)jiffies * (1000000000 / HZ);

}



#ifndef CONFIG_GENERIC_TIME

void do_gettimeofday(struct timeval *tv)

{

	unsigned long seq;
@@ -99,6 +100,7 @@ int do_settimeofday(struct timespec *tv) 
	return 0;

}

EXPORT_SYMBOL(do_settimeofday);

#endif /* !CONFIG_GENERIC_TIME */



/* last time the RTC clock got updated */

static long last_rtc_update;

include/asm-sh/timer.h

+4 −0
Original line number Diff line number Diff line
@@ -8,7 +8,9 @@ struct sys_timer_ops { 
	int (*init)(void);

	int (*start)(void);

	int (*stop)(void);

#ifndef CONFIG_GENERIC_TIME

	unsigned long (*get_offset)(void);

#endif

	unsigned long (*get_frequency)(void);

};
@@ -24,10 +26,12 @@ struct sys_timer { 
extern struct sys_timer tmu_timer;

extern struct sys_timer *sys_timer;



#ifndef CONFIG_GENERIC_TIME

static inline unsigned long get_timer_offset(void)

{

	return sys_timer->ops->get_offset();

}

#endif



static inline unsigned long get_timer_frequency(void)

{

CRA Git | Maintained and supported by SUSTech CRA and CCSE