commit 037ef5ce3ce11c98a05d4354ec65c1d3bbd174e9
author Simon Glass <sjg@chromium.org> Mon May 22 05:05:22 2017 -0600
committer Tom Rini <trini@konsulko.com> Mon Jun 05 14:13:03 2017 -0400
tree 7b96448ed63e93432c87c282ceb95063990a0d54
parent 318735be857dc664792f8d3e17d5649f29586e0d

bootstage: Provide a default timer function

If CONFIG_SYS_TIMER_COUNTER is used we can provide a default microsecond
timer implementation.

Signed-off-by: Simon Glass <sjg@chromium.org>

lib/time.c

diff --git a/lib/time.c b/lib/time.c
index 3c49243..aed1a09 100644
--- a/lib/time.c
+++ b/lib/time.c
@@ -36,6 +36,23 @@
 	return readl(CONFIG_SYS_TIMER_COUNTER);
 #endif
 }
+
+ulong timer_get_boot_us(void)
+{
+	ulong count = timer_read_counter();
+
+#if CONFIG_SYS_TIMER_RATE == 1000000
+	return count;
+#elif CONFIG_SYS_TIMER_RATE > 1000000
+	return lldiv(count, CONFIG_SYS_TIMER_RATE / 1000000);
+#elif defined(CONFIG_SYS_TIMER_RATE)
+	return (unsigned long long)count * 1000000 / CONFIG_SYS_TIMER_RATE;
+#else
+	/* Assume the counter is in microseconds */
+	return count;
+#endif
+}
+
 #else
 extern unsigned long __weak timer_read_counter(void);
 #endif