diff options
Diffstat (limited to 'drivers/mailbox')
| -rw-r--r-- | drivers/mailbox/mailbox-uclass.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/drivers/mailbox/mailbox-uclass.c b/drivers/mailbox/mailbox-uclass.c index 85ba8c5fd9..1a9c6918d8 100644 --- a/drivers/mailbox/mailbox-uclass.c +++ b/drivers/mailbox/mailbox-uclass.c @@ -115,13 +115,29 @@ int mbox_free(struct mbox_chan *chan) return 0; } -int mbox_send(struct mbox_chan *chan, const void *data) +int mbox_send(struct mbox_chan *chan, const void *data, ulong timeout_us) { struct mbox_ops *ops = mbox_dev_ops(chan->dev); + ulong start_time; + int ret; debug("%s(chan=%p, data=%p)\n", __func__, chan, data); - return ops->send(chan, data); + start_time = timer_get_us(); + /* + * Account for partial us ticks, but if timeout_us is 0, ensure we + * still don't wait at all. + */ + if (timeout_us) + timeout_us++; + + for (;;) { + ret = ops->send(chan, data); + if (ret != -EBUSY) + return ret; + if ((timer_get_us() - start_time) >= timeout_us) + return -ETIMEDOUT; + } } int mbox_recv(struct mbox_chan *chan, void *data, ulong timeout_us) |