{
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;