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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 /drivers/timer
parent4f051824b5c2a6bf8d3114c772676977fb95969a (diff)
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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 'drivers/timer')
-rw-r--r--drivers/timer/Kconfig10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/timer/Kconfig b/drivers/timer/Kconfig
index ff65a73..cb18f12 100644
--- a/drivers/timer/Kconfig
+++ b/drivers/timer/Kconfig
@@ -9,6 +9,16 @@ config TIMER
will be used. The timer is usually a 32 bits free-running up
counter. There may be no real tick, and no timer interrupt.
+config TIMER_EARLY
+ bool "Allow timer to be used early in U-Boot"
+ depends on TIMER
+ help
+ 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().
+
config ALTERA_TIMER
bool "Altera timer support"
depends on TIMER