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| author | Simon Glass <sjg@chromium.org> | 2016-02-24 09:14:49 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2016-02-26 08:53:10 -0700 |
| commit | c95fec31928d7e2596364ee1d226b52ffd7793f2 (patch) | |
| tree | 07972d661c4ce017dbaa2d5e8ce488717aed6cdd /lib/time.c | |
| parent | 4f051824b5c2a6bf8d3114c772676977fb95969a (diff) | |
| download | u-boot-c95fec31928d7e2596364ee1d226b52ffd7793f2.tar.gz u-boot-c95fec31928d7e2596364ee1d226b52ffd7793f2.tar.bz2 u-boot-c95fec31928d7e2596364ee1d226b52ffd7793f2.zip | |
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/time.c')
| -rw-r--r-- | lib/time.c | 28 |
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) |