1 files changed, 41 insertions, 8 deletions

diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
index a135d28e202..63229c5287e 100644
--- a/arch/arm/mach-omap2/timer.c
+++ b/arch/arm/mach-omap2/timer.c
@@ -222,10 +222,24 @@ void __init omap_dmtimer_init(void)
 	}
 }
 
+/**
+ * omap_dm_timer_get_errata - get errata flags for a timer
+ *
+ * Get the timer errata flags that are specific to the OMAP device being used.
+ */
+u32 __init omap_dm_timer_get_errata(void)
+{
+	if (cpu_is_omap24xx())
+		return 0;
+
+	return OMAP_TIMER_ERRATA_I103_I767;
+}
+
 static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
 						int gptimer_id,
 						const char *fck_source,
-						const char *property)
+						const char *property,
+						int posted)
 {
 	char name[10]; /* 10 = sizeof("gptXX_Xck0") */
 	const char *oh_name;
@@ -311,10 +325,15 @@ static int __init omap_dm_timer_init_one(struct omap_dm_timer *timer,
 	}
 	__omap_dm_timer_init_regs(timer);
 	__omap_dm_timer_reset(timer, 1, 1);
-	timer->posted = 1;
 
-	timer->rate = clk_get_rate(timer->fclk);
+	if (posted)
+		__omap_dm_timer_enable_posted(timer);
+
+	/* Check that the intended posted configuration matches the actual */
+	if (posted != timer->posted)
+		return -EINVAL;
 
+	timer->rate = clk_get_rate(timer->fclk);
 	timer->reserved = 1;
 
 	return res;
@@ -326,7 +345,17 @@ static void __init omap2_gp_clockevent_init(int gptimer_id,
 {
 	int res;
 
-	res = omap_dm_timer_init_one(&clkev, gptimer_id, fck_source, property);
+	clkev.errata = omap_dm_timer_get_errata();
+
+	/*
+	 * For clock-event timers we never read the timer counter and
+	 * so we are not impacted by errata i103 and i767. Therefore,
+	 * we can safely ignore this errata for clock-event timers.
+	 */
+	__omap_dm_timer_override_errata(&clkev, OMAP_TIMER_ERRATA_I103_I767);
+
+	res = omap_dm_timer_init_one(&clkev, gptimer_id, fck_source, property,
+				     OMAP_TIMER_POSTED);
 	BUG_ON(res);
 
 	omap2_gp_timer_irq.dev_id = &clkev;
@@ -360,7 +389,7 @@ static bool use_gptimer_clksrc;
 static cycle_t clocksource_read_cycles(struct clocksource *cs)
 {
 	return (cycle_t)__omap_dm_timer_read_counter(&clksrc,
-						     OMAP_TIMER_POSTED);
+						     OMAP_TIMER_NONPOSTED);
 }
 
 static struct clocksource clocksource_gpt = {
@@ -375,7 +404,7 @@ static u32 notrace dmtimer_read_sched_clock(void)
 {
 	if (clksrc.reserved)
 		return __omap_dm_timer_read_counter(&clksrc,
-						    OMAP_TIMER_POSTED);
+						    OMAP_TIMER_NONPOSTED);
 
 	return 0;
 }
@@ -453,12 +482,15 @@ static void __init omap2_gptimer_clocksource_init(int gptimer_id,
 {
 	int res;
 
-	res = omap_dm_timer_init_one(&clksrc, gptimer_id, fck_source, NULL);
+	clksrc.errata = omap_dm_timer_get_errata();
+
+	res = omap_dm_timer_init_one(&clksrc, gptimer_id, fck_source, NULL,
+				     OMAP_TIMER_NONPOSTED);
 	BUG_ON(res);
 
 	__omap_dm_timer_load_start(&clksrc,
 				   OMAP_TIMER_CTRL_ST | OMAP_TIMER_CTRL_AR, 0,
-				   OMAP_TIMER_POSTED);
+				   OMAP_TIMER_NONPOSTED);
 	setup_sched_clock(dmtimer_read_sched_clock, 32, clksrc.rate);
 
 	if (clocksource_register_hz(&clocksource_gpt, clksrc.rate))
@@ -696,6 +728,7 @@ static int __init omap_timer_init(struct omap_hwmod *oh, void *unused)
 	if (timer_dev_attr)
 		pdata->timer_capability = timer_dev_attr->timer_capability;
 
+	pdata->timer_errata = omap_dm_timer_get_errata();
 	pdata->get_context_loss_count = omap_pm_get_dev_context_loss_count;
 
 	pdev = omap_device_build(name, id, oh, pdata, sizeof(*pdata),