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authorSudeep Holla <sudeep.holla@arm.com>2014-11-11 19:33:01 +0100
committerJassi Brar <jaswinder.singh@linaro.org>2014-11-27 08:20:59 +0100
commit97b0c7bd2e86c6e1e00c6b7178cf953d5f70c71a (patch)
tree32772563036f2a73a6603ba15ace848c710520b2 /drivers/mailbox
parentmailbox: Don't unnecessarily re-arm the polling timer (diff)
downloadlinux-97b0c7bd2e86c6e1e00c6b7178cf953d5f70c71a.tar.xz
linux-97b0c7bd2e86c6e1e00c6b7178cf953d5f70c71a.zip
mailbox: add tx_prepare client callback
If the mailbox controller expects the payload is in place before initiating the transmit, then it's impossible to reuse the list maintained by core mailbox code currently. Maintaining another list for sending the message in the controller seems totally unnecessary as core mailbox library already provides that feature. This patch introduces tx_prepare callback in mbox_client which can be used by the core mailbox library before initiating the transaction through mbox->ops->send_data. The client driver can implement this callback to ensure the payload is copied to the shared memory. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Diffstat (limited to 'drivers/mailbox')
-rw-r--r--drivers/mailbox/mailbox.c2
1 files changed, 2 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) {