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Diffstat (limited to 'arch/arm/mach-prima2/timer.c')
-rw-r--r--arch/arm/mach-prima2/timer.c38
1 files changed, 36 insertions, 2 deletions
diff --git a/arch/arm/mach-prima2/timer.c b/arch/arm/mach-prima2/timer.c
index ed7ec48d11da..b7a6091ce791 100644
--- a/arch/arm/mach-prima2/timer.c
+++ b/arch/arm/mach-prima2/timer.c
@@ -40,6 +40,17 @@
#define SIRFSOC_TIMER_LATCH_BIT BIT(0)
+#define SIRFSOC_TIMER_REG_CNT 11
+
+static const u32 sirfsoc_timer_reg_list[SIRFSOC_TIMER_REG_CNT] = {
+ SIRFSOC_TIMER_MATCH_0, SIRFSOC_TIMER_MATCH_1, SIRFSOC_TIMER_MATCH_2,
+ SIRFSOC_TIMER_MATCH_3, SIRFSOC_TIMER_MATCH_4, SIRFSOC_TIMER_MATCH_5,
+ SIRFSOC_TIMER_INT_EN, SIRFSOC_TIMER_WATCHDOG_EN, SIRFSOC_TIMER_DIV,
+ SIRFSOC_TIMER_LATCHED_LO, SIRFSOC_TIMER_LATCHED_HI,
+};
+
+static u32 sirfsoc_timer_reg_val[SIRFSOC_TIMER_REG_CNT];
+
static void __iomem *sirfsoc_timer_base;
static void __init sirfsoc_of_timer_map(void);
@@ -106,6 +117,27 @@ static void sirfsoc_timer_set_mode(enum clock_event_mode mode,
}
}
+static void sirfsoc_clocksource_suspend(struct clocksource *cs)
+{
+ int i;
+
+ writel_relaxed(SIRFSOC_TIMER_LATCH_BIT, sirfsoc_timer_base + SIRFSOC_TIMER_LATCH);
+
+ for (i = 0; i < SIRFSOC_TIMER_REG_CNT; i++)
+ sirfsoc_timer_reg_val[i] = readl_relaxed(sirfsoc_timer_base + sirfsoc_timer_reg_list[i]);
+}
+
+static void sirfsoc_clocksource_resume(struct clocksource *cs)
+{
+ int i;
+
+ for (i = 0; i < SIRFSOC_TIMER_REG_CNT; i++)
+ writel_relaxed(sirfsoc_timer_reg_val[i], sirfsoc_timer_base + sirfsoc_timer_reg_list[i]);
+
+ writel_relaxed(sirfsoc_timer_reg_val[i - 2], sirfsoc_timer_base + SIRFSOC_TIMER_COUNTER_LO);
+ writel_relaxed(sirfsoc_timer_reg_val[i - 1], sirfsoc_timer_base + SIRFSOC_TIMER_COUNTER_HI);
+}
+
static struct clock_event_device sirfsoc_clockevent = {
.name = "sirfsoc_clockevent",
.rating = 200,
@@ -120,6 +152,8 @@ static struct clocksource sirfsoc_clocksource = {
.mask = CLOCKSOURCE_MASK(64),
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
.read = sirfsoc_timer_read,
+ .suspend = sirfsoc_clocksource_suspend,
+ .resume = sirfsoc_clocksource_resume,
};
static struct irqaction sirfsoc_timer_irq = {
@@ -133,14 +167,14 @@ static struct irqaction sirfsoc_timer_irq = {
/* Overwrite weak default sched_clock with more precise one */
unsigned long long notrace sched_clock(void)
{
- static int is_mapped = 0;
+ static int is_mapped;
/*
* sched_clock is called earlier than .init of sys_timer
* if we map timer memory in .init of sys_timer, system
* will panic due to illegal memory access
*/
- if(!is_mapped) {
+ if (!is_mapped) {
sirfsoc_of_timer_map();
is_mapped = 1;
}