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authorSimon Glass <sjg@chromium.org>2016-02-24 09:14:49 -0700
committerSimon Glass <sjg@chromium.org>2016-02-26 08:53:10 -0700
commitc95fec31928d7e2596364ee1d226b52ffd7793f2 (patch)
tree07972d661c4ce017dbaa2d5e8ce488717aed6cdd /lib
parent4f051824b5c2a6bf8d3114c772676977fb95969a (diff)
timer: Provide an early timer
In some cases the timer must be accessible before driver model is active. Examples include when using CONFIG_TRACE to trace U-Boot's execution before driver model is set up. Enable this option to use an early timer. These functions must be supported by your timer driver: timer_early_get_count() and timer_early_get_rate(). Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'lib')
-rw-r--r--lib/time.c28
1 files changed, 21 insertions, 7 deletions
diff --git a/lib/time.c b/lib/time.c
index e9f6861b98..f37150fddc 100644
--- a/lib/time.c
+++ b/lib/time.c
@@ -43,11 +43,17 @@ extern unsigned long __weak timer_read_counter(void);
#ifdef CONFIG_TIMER
ulong notrace get_tbclk(void)
{
- int ret;
+ if (!gd->timer) {
+#ifdef CONFIG_TIMER_EARLY
+ return timer_early_get_rate();
+#else
+ int ret;
- ret = dm_timer_init();
- if (ret)
- return ret;
+ ret = dm_timer_init();
+ if (ret)
+ return ret;
+#endif
+ }
return timer_get_rate(gd->timer);
}
@@ -57,9 +63,17 @@ uint64_t notrace get_ticks(void)
u64 count;
int ret;
- ret = dm_timer_init();
- if (ret)
- return ret;
+ if (!gd->timer) {
+#ifdef CONFIG_TIMER_EARLY
+ return timer_early_get_count();
+#else
+ int ret;
+
+ ret = dm_timer_init();
+ if (ret)
+ return ret;
+#endif
+ }
ret = timer_get_count(gd->timer, &count);
if (ret)