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Diffstat (limited to 'arch/arm/mach-ux500/timer.c')
-rw-r--r--arch/arm/mach-ux500/timer.c76
1 files changed, 10 insertions, 66 deletions
diff --git a/arch/arm/mach-ux500/timer.c b/arch/arm/mach-ux500/timer.c
index 05a4ff78b3b..87efda0aa34 100644
--- a/arch/arm/mach-ux500/timer.c
+++ b/arch/arm/mach-ux500/timer.c
@@ -10,40 +10,12 @@
#include <linux/clocksource.h>
#include <linux/of.h>
#include <linux/of_address.h>
-#include <linux/platform_data/clocksource-nomadik-mtu.h>
-
-#include <asm/smp_twd.h>
#include "setup.h"
-#include "irqs.h"
#include "db8500-regs.h"
#include "id.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())
- clocksource_of_init();
- 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
-
const static struct of_device_id prcmu_timer_of_match[] __initconst = {
{ .compatible = "stericsson,db8500-prcmu-timer-4", },
{ },
@@ -51,54 +23,26 @@ const static struct of_device_id prcmu_timer_of_match[] __initconst = {
void __init ux500_timer_init(void)
{
- void __iomem *mtu_timer_base;
void __iomem *prcmu_timer_base;
void __iomem *tmp_base;
struct device_node *np;
- if (cpu_is_u8500_family() || cpu_is_ux540_family()) {
- mtu_timer_base = __io_address(U8500_MTU0_BASE);
+ if (cpu_is_u8500_family() || cpu_is_ux540_family())
prcmu_timer_base = __io_address(U8500_PRCMU_TIMER_4_BASE);
- } else {
+ else
ux500_unknown_soc();
- }
- /* TODO: Once MTU has been DT:ed place code above into else. */
- if (of_have_populated_dt()) {
-#ifdef CONFIG_OF
- np = of_find_matching_node(NULL, prcmu_timer_of_match);
- if (!np)
-#endif
- goto dt_fail;
+ np = of_find_matching_node(NULL, prcmu_timer_of_match);
+ if (!np)
+ goto dt_fail;
- tmp_base = of_iomap(np, 0);
- if (!tmp_base)
- goto dt_fail;
+ tmp_base = of_iomap(np, 0);
+ if (!tmp_base)
+ goto dt_fail;
- prcmu_timer_base = tmp_base;
- }
+ prcmu_timer_base = tmp_base;
dt_fail:
- /* Doing it the old fashioned way. */
-
- /*
- * 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.
- *
- */
- if (!of_have_populated_dt())
- nmdk_timer_init(mtu_timer_base, IRQ_MTU0);
clksrc_dbx500_prcmu_init(prcmu_timer_base);
- ux500_twd_init();
+ clocksource_of_init();
}