mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 23:53:55 +08:00
59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
|
/*
|
||
|
|
* 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 <linux/clksrc-dbx500-prcmu.h>
|
||
|
|
|
||
|
|
#include <asm/localtimer.h>
|
||
|
|
|
||
|
|
#include <plat/mtu.h>
|
||
|
|
|
||
|
|
#include <mach/setup.h>
|
||
|
|
#include <mach/hardware.h>
|
||
|
|
|
||
|
|
static void __init ux500_timer_init(void)
|
||
|
|
{
|
||
|
|
if (cpu_is_u5500()) {
|
||
|
|
#ifdef CONFIG_LOCAL_TIMERS
|
||
|
|
twd_base = __io_address(U5500_TWD_BASE);
|
||
|
|
#endif
|
||
|
|
mtu_base = __io_address(U5500_MTU0_BASE);
|
||
|
|
clksrc_dbx500_timer_base = __io_address(U5500_PRCMU_TIMER_3_BASE);
|
||
|
|
} else if (cpu_is_u8500()) {
|
||
|
|
#ifdef CONFIG_LOCAL_TIMERS
|
||
|
|
twd_base = __io_address(U8500_TWD_BASE);
|
||
|
|
#endif
|
||
|
|
mtu_base = __io_address(U8500_MTU0_BASE);
|
||
|
|
clksrc_dbx500_timer_base = __io_address(U8500_PRCMU_TIMER_4_BASE);
|
||
|
|
} else {
|
||
|
|
ux500_unknown_soc();
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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(3 for DB5500) register a clocksource and
|
||
|
|
* sched_clock with higher rating then MTU since is always-on.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
nmdk_timer_init();
|
||
|
|
clksrc_dbx500_prcmu_init();
|
||
|
|
}
|
||
|
|
|
||
|
|
struct sys_timer ux500_timer = {
|
||
|
|
.init = ux500_timer_init,
|
||
|
|
};
|