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Diffstat (limited to 'arch/arm/mach-ux500/timer.c')
-rw-r--r--arch/arm/mach-ux500/timer.c39
1 files changed, 30 insertions, 9 deletions
diff --git a/arch/arm/mach-ux500/timer.c b/arch/arm/mach-ux500/timer.c
index d37df98..66e7f00 100644
--- a/arch/arm/mach-ux500/timer.c
+++ b/arch/arm/mach-ux500/timer.c
@@ -8,6 +8,7 @@
#include <linux/errno.h>
#include <linux/clksrc-dbx500-prcmu.h>
#include <linux/of.h>
+#include <linux/of_address.h>
#include <asm/smp_twd.h>
@@ -18,8 +19,6 @@
#include <mach/irqs.h>
#ifdef CONFIG_HAVE_ARM_TWD
-static DEFINE_TWD_LOCAL_TIMER(u5500_twd_local_timer,
- U5500_TWD_BASE, IRQ_LOCALTIMER);
static DEFINE_TWD_LOCAL_TIMER(u8500_twd_local_timer,
U8500_TWD_BASE, IRQ_LOCALTIMER);
@@ -28,8 +27,8 @@ static void __init ux500_twd_init(void)
struct twd_local_timer *twd_local_timer;
int err;
- twd_local_timer = cpu_is_u5500() ? &u5500_twd_local_timer :
- &u8500_twd_local_timer;
+ /* 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();
@@ -43,21 +42,43 @@ static void __init ux500_twd_init(void)
#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", },
+ { },
+};
+
static 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_u5500()) {
- mtu_timer_base = __io_address(U5500_MTU0_BASE);
- prcmu_timer_base = __io_address(U5500_PRCMU_TIMER_3_BASE);
- } else if (cpu_is_u8500()) {
+ if (cpu_is_u8500_family()) {
mtu_timer_base = __io_address(U8500_MTU0_BASE);
prcmu_timer_base = __io_address(U8500_PRCMU_TIMER_4_BASE);
} 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;
+
+ tmp_base = of_iomap(np, 0);
+ if (!tmp_base)
+ goto dt_fail;
+
+ 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.
@@ -70,7 +91,7 @@ static void __init ux500_timer_init(void)
* 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
+ * The PRCMU timer 4 register a clocksource and
* sched_clock with higher rating then MTU since is always-on.
*
*/