mirror of
https://github.com/torvalds/linux
synced 2024-10-22 19:25:51 +00:00
29746f48d1
This platform has been obsoleted and was only available inside of ST-Ericsson, no users of this code are left in the world. This deletes the core U5500 support entirely in the same manner as the obsoleted U8500 silicon was previously deleted. The cpu_is_u5500() macros that can read out the CPU ID is left until the next kernel cycle, this makes it possible to merge deletion of dependent drivers without breakage. This also has the upside of removing the mailbox driver which was our only driver that was outside the drivers/* hiearchy, now the machine directory only handles machines and nothing else. Cc: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> Cc: Rabin Vincent <rabin.vincent@stericsson.com> Cc: Jonas Aberg <jonas.aberg@stericsson.com> Cc: Per Forlin <per.forlin@stericsson.com> Cc: Ulf Hansson <ulf.hansson@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
88 lines
2.2 KiB
C
88 lines
2.2 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/errno.h>
|
|
#include <linux/clksrc-dbx500-prcmu.h>
|
|
#include <linux/of.h>
|
|
|
|
#include <asm/smp_twd.h>
|
|
|
|
#include <plat/mtu.h>
|
|
|
|
#include <mach/setup.h>
|
|
#include <mach/hardware.h>
|
|
#include <mach/irqs.h>
|
|
|
|
#ifdef CONFIG_HAVE_ARM_TWD
|
|
static DEFINE_TWD_LOCAL_TIMER(u8500_twd_local_timer,
|
|
U8500_TWD_BASE, IRQ_LOCALTIMER);
|
|
|
|
static void __init ux500_twd_init(void)
|
|
{
|
|
struct twd_local_timer *twd_local_timer;
|
|
int err;
|
|
|
|
/* Use this to switch local timer base if changed in new ASICs */
|
|
twd_local_timer = &u8500_twd_local_timer;
|
|
|
|
if (of_have_populated_dt())
|
|
twd_local_timer_of_register();
|
|
else {
|
|
err = twd_local_timer_register(twd_local_timer);
|
|
if (err)
|
|
pr_err("twd_local_timer_register failed %d\n", err);
|
|
}
|
|
}
|
|
#else
|
|
#define ux500_twd_init() do { } while(0)
|
|
#endif
|
|
|
|
static void __init ux500_timer_init(void)
|
|
{
|
|
void __iomem *mtu_timer_base;
|
|
void __iomem *prcmu_timer_base;
|
|
|
|
if (cpu_is_u8500()) {
|
|
mtu_timer_base = __io_address(U8500_MTU0_BASE);
|
|
prcmu_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 register a clocksource and
|
|
* sched_clock with higher rating then MTU since is always-on.
|
|
*
|
|
*/
|
|
|
|
nmdk_timer_init(mtu_timer_base);
|
|
clksrc_dbx500_prcmu_init(prcmu_timer_base);
|
|
ux500_twd_init();
|
|
}
|
|
|
|
static void ux500_timer_reset(void)
|
|
{
|
|
nmdk_clkevt_reset();
|
|
nmdk_clksrc_reset();
|
|
}
|
|
|
|
struct sys_timer ux500_timer = {
|
|
.init = ux500_timer_init,
|
|
.resume = ux500_timer_reset,
|
|
};
|