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| author | Philipp Tomsich <philipp.tomsich@theobroma-systems.com> | 2017-09-11 22:04:11 +0200 |
|---|---|---|
| committer | Philipp Tomsich <philipp.tomsich@theobroma-systems.com> | 2017-09-18 20:40:33 +0200 |
| commit | af823151641b1a9a8eae8c3b111f5fa27e6873ac (patch) | |
| tree | ab1c2cc6793ab8511b5f66bea2b95d38cbb5e4c7 /drivers/timer | |
| parent | b61e8b0c9e76dacf0b670c3948c3cd738b2379a3 (diff) | |
| download | u-boot-af823151641b1a9a8eae8c3b111f5fa27e6873ac.tar.gz u-boot-af823151641b1a9a8eae8c3b111f5fa27e6873ac.tar.bz2 u-boot-af823151641b1a9a8eae8c3b111f5fa27e6873ac.zip | |
dm: timer: handle being called before dm_root is ready
When used with bootstage recording, dm_timer_init may be called
surprisingly early: i.e. before dm_root is ready. To deal with
this case, we explicitly check for this condition and return
-EAGAIN to the caller (refer to drivers/timer/rockchip_timer.c
for a case where this is needed/used).
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Diffstat (limited to 'drivers/timer')
| -rw-r--r-- | drivers/timer/timer-uclass.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/timer/timer-uclass.c b/drivers/timer/timer-uclass.c index 62d6f0b29a..45397b230f 100644 --- a/drivers/timer/timer-uclass.c +++ b/drivers/timer/timer-uclass.c @@ -92,6 +92,13 @@ int notrace dm_timer_init(void) if (gd->timer) return 0; + /* + * Directly access gd->dm_root to suppress error messages, if the + * virtual root driver does not yet exist. + */ + if (gd->dm_root == NULL) + return -EAGAIN; + #if !CONFIG_IS_ENABLED(OF_PLATDATA) /* Check for a chosen timer to be used for tick */ node = ofnode_get_chosen_node("tick-timer"); |