timer: cadence: Implement timer_get_boot_us

[u-boot] / drivers / timer / cadence-ttc.c

diff --git a/drivers/timer/cadence-ttc.c b/drivers/timer/cadence-ttc.c
index 3541e5c841278fa308697ef94876406ebd7f9634..4125a078b385d8d5c2b3f0ee55c4e79ae6804149 100644 (file)
--- a/drivers/timer/cadence-ttc.c
+++ b/drivers/timer/cadence-ttc.c
@@ -31,6 +31,28 @@ struct cadence_ttc_priv {
        struct cadence_ttc_regs *regs;
 };
 
+#if CONFIG_IS_ENABLED(BOOTSTAGE)
+ulong timer_get_boot_us(void)
+{
+       u64 ticks = 0;
+       u32 rate = 1;
+       u64 us;
+       int ret;
+
+       ret = dm_timer_init();
+       if (!ret) {
+               /* The timer is available */
+               rate = timer_get_rate(gd->timer);
+               timer_get_count(gd->timer, &ticks);
+       } else {
+               return 0;
+       }
+
+       us = (ticks * 1000) / rate;
+       return us;
+}
+#endif
+
 static int cadence_ttc_get_count(struct udevice *dev, u64 *count)
 {
        struct cadence_ttc_priv *priv = dev_get_priv(dev);