diff options
| -rw-r--r-- | drivers/mailbox/mailbox.c | 2 | ||||
| -rw-r--r-- | include/linux/mailbox_client.h | 3 |
2 files changed, 5 insertions, 0 deletions
diff --git a/drivers/mailbox/mailbox.c b/drivers/mailbox/mailbox.c index c281e5562876..58789b027708 100644 --- a/drivers/mailbox/mailbox.c +++ b/drivers/mailbox/mailbox.c @@ -78,6 +78,8 @@ static void msg_submit(struct mbox_chan *chan) data = chan->msg_data[idx]; + if (chan->cl->tx_prepare) + chan->cl->tx_prepare(chan->cl, data); /* Try to submit a message to the MBOX controller */ err = chan->mbox->ops->send_data(chan, data); if (!err) { diff --git a/include/linux/mailbox_client.h b/include/linux/mailbox_client.h index 307d9cab2026..1726ccbd8009 100644 --- a/include/linux/mailbox_client.h +++ b/include/linux/mailbox_client.h @@ -25,6 +25,8 @@ struct mbox_chan; * if the client receives some ACK packet for transmission. * Unused if the controller already has TX_Done/RTR IRQ. * @rx_callback: Atomic callback to provide client the data received + * @tx_prepare: Atomic callback to ask client to prepare the payload + * before initiating the transmission if required. * @tx_done: Atomic callback to tell client of data transmission */ struct mbox_client { @@ -34,6 +36,7 @@ struct mbox_client { bool knows_txdone; void (*rx_callback)(struct mbox_client *cl, void *mssg); + void (*tx_prepare)(struct mbox_client *cl, void *mssg); void (*tx_done)(struct mbox_client *cl, void *mssg, int r); }; |