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Diffstat (limited to 'arch/powerpc/kernel/time.c')
-rw-r--r--arch/powerpc/kernel/time.c67
1 files changed, 33 insertions, 34 deletions
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 24e3ad756de0..d20907561f46 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -76,7 +76,6 @@
/* keep track of when we need to update the rtc */
time_t last_rtc_update;
-extern int piranha_simulator;
#ifdef CONFIG_PPC_ISERIES
unsigned long iSeries_recal_titan = 0;
unsigned long iSeries_recal_tb = 0;
@@ -858,42 +857,50 @@ int do_settimeofday(struct timespec *tv)
EXPORT_SYMBOL(do_settimeofday);
-void __init generic_calibrate_decr(void)
+static int __init get_freq(char *name, int cells, unsigned long *val)
{
struct device_node *cpu;
unsigned int *fp;
- int node_found;
+ int found = 0;
- /*
- * The cpu node should have a timebase-frequency property
- * to tell us the rate at which the decrementer counts.
- */
+ /* The cpu node should have timebase and clock frequency properties */
cpu = of_find_node_by_type(NULL, "cpu");
- ppc_tb_freq = DEFAULT_TB_FREQ; /* hardcoded default */
- node_found = 0;
if (cpu) {
- fp = (unsigned int *)get_property(cpu, "timebase-frequency",
- NULL);
+ fp = (unsigned int *)get_property(cpu, name, NULL);
if (fp) {
- node_found = 1;
- ppc_tb_freq = *fp;
+ found = 1;
+ *val = 0;
+ while (cells--)
+ *val = (*val << 32) | *fp++;
}
+
+ of_node_put(cpu);
}
- if (!node_found)
+
+ return found;
+}
+
+void __init generic_calibrate_decr(void)
+{
+ ppc_tb_freq = DEFAULT_TB_FREQ; /* hardcoded default */
+
+ if (!get_freq("ibm,extended-timebase-frequency", 2, &ppc_tb_freq) &&
+ !get_freq("timebase-frequency", 1, &ppc_tb_freq)) {
+
printk(KERN_ERR "WARNING: Estimating decrementer frequency "
"(not found)\n");
+ }
- ppc_proc_freq = DEFAULT_PROC_FREQ;
- node_found = 0;
- if (cpu) {
- fp = (unsigned int *)get_property(cpu, "clock-frequency",
- NULL);
- if (fp) {
- node_found = 1;
- ppc_proc_freq = *fp;
- }
+ ppc_proc_freq = DEFAULT_PROC_FREQ; /* hardcoded default */
+
+ if (!get_freq("ibm,extended-clock-frequency", 2, &ppc_proc_freq) &&
+ !get_freq("clock-frequency", 1, &ppc_proc_freq)) {
+
+ printk(KERN_ERR "WARNING: Estimating processor frequency "
+ "(not found)\n");
}
+
#ifdef CONFIG_BOOKE
/* Set the time base to zero */
mtspr(SPRN_TBWL, 0);
@@ -905,11 +912,6 @@ void __init generic_calibrate_decr(void)
/* Enable decrementer interrupt */
mtspr(SPRN_TCR, TCR_DIE);
#endif
- if (!node_found)
- printk(KERN_ERR "WARNING: Estimating processor frequency "
- "(not found)\n");
-
- of_node_put(cpu);
}
unsigned long get_boot_time(void)
@@ -945,9 +947,9 @@ void __init time_init(void)
} else {
/* Normal PowerPC with timebase register */
ppc_md.calibrate_decr();
- printk(KERN_INFO "time_init: decrementer frequency = %lu.%.6lu MHz\n",
+ printk(KERN_DEBUG "time_init: decrementer frequency = %lu.%.6lu MHz\n",
ppc_tb_freq / 1000000, ppc_tb_freq % 1000000);
- printk(KERN_INFO "time_init: processor frequency = %lu.%.6lu MHz\n",
+ printk(KERN_DEBUG "time_init: processor frequency = %lu.%.6lu MHz\n",
ppc_proc_freq / 1000000, ppc_proc_freq % 1000000);
tb_last_stamp = tb_last_jiffy = get_tb();
}
@@ -1010,10 +1012,7 @@ void __init time_init(void)
tb_to_ns_scale = scale;
tb_to_ns_shift = shift;
-#ifdef CONFIG_PPC_ISERIES
- if (!piranha_simulator)
-#endif
- tm = get_boot_time();
+ tm = get_boot_time();
write_seqlock_irqsave(&xtime_lock, flags);