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/*
* Copyright (C) ST-Ericsson SA 2011
*
* License Terms: GNU General Public License v2
* Author: Mattias Wallin <mattias.wallin@stericsson.com> for ST-Ericsson
*/
#include <linux/io.h>
#include <mach/setup.h>
#include <mach/hardware.h>
#include "pm/context.h"
void u8500_rtc_init(unsigned int cpu);
void db8500_prcmu_timer_init(void);
void mtu_timer_init(void);
void mtu_clocksource_reset(void);
void mtu_clockevent_reset(void);
#ifdef CONFIG_LOCAL_TIMERS
extern void *twd_base;
#endif
#ifdef CONFIG_UX500_CONTEXT
static int mtu_context_notifier_call(struct notifier_block *this,
unsigned long event, void *data)
{
if (event == CONTEXT_APE_RESTORE)
mtu_clocksource_reset();
return NOTIFY_OK;
}
static struct notifier_block mtu_context_notifier = {
.notifier_call = mtu_context_notifier_call,
};
#endif
static void u8500_timer_reset(void)
{
mtu_clockevent_reset();
}
static void __init u8500_timer_init(void)
{
#ifdef CONFIG_LOCAL_TIMERS
if (cpu_is_u5500())
twd_base = __io_address(U5500_TWD_BASE);
else if (cpu_is_u8500())
twd_base = __io_address(U8500_TWD_BASE);
else
ux500_unknown_soc();
#endif
/*
* Here we register the timerblocks active in the system.
* Localtimers (twd) is started when both cpu is up and running.
* MTU register a clocksource, clockevent and sched_clock.
* Since the MTU is located in the VAPE power domain
* it will be cleared in sleep which makes it unsuitable.
* We however need it as a timer tick (clockevent)
* during boot to calibrate delay until twd is started.
* RTC-RTT have problems as timer tick during boot since it is depending
* on delay which is not yet calibrated. RTC-RTT is in the always-on
* powerdomain and is used as clockevent instead of twd when sleeping.
* The PRCMU timer 4 register a clocksource and sched_clock with higher
* rating then MTU since is always-on.
*
*/
mtu_timer_init();
#ifdef CONFIG_U8500_PRCMU
u8500_rtc_init(0);
db8500_prcmu_timer_init();
#endif
#ifdef CONFIG_UX500_CONTEXT
WARN_ON(context_ape_notifier_register(&mtu_context_notifier));
#endif
}
struct sys_timer u8500_timer = {
.init = u8500_timer_init,
.resume = u8500_timer_reset,
};
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