diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/timer/tsc_timer.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/timer/tsc_timer.c b/drivers/timer/tsc_timer.c index cf869998bf..747f190d38 100644 --- a/drivers/timer/tsc_timer.c +++ b/drivers/timer/tsc_timer.c @@ -377,14 +377,23 @@ static int tsc_timer_probe(struct udevice *dev) { struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev); - tsc_timer_ensure_setup(); - uc_priv->clock_rate = gd->arch.clock_rate; + if (!uc_priv->clock_rate) { + tsc_timer_ensure_setup(); + uc_priv->clock_rate = gd->arch.clock_rate; + } else { + gd->arch.tsc_base = rdtsc(); + } return 0; } unsigned long notrace timer_early_get_rate(void) { + /* + * When TSC timer is used as the early timer, be warned that the timer + * clock rate can only be calibrated via some hardware ways. Specifying + * it in the device tree won't work for the early timer. + */ tsc_timer_ensure_setup(); return gd->arch.clock_rate; |