diff options
| author | Conor Dooley <conor.dooley@microchip.com> | 2023-03-07 21:22:52 +0100 |
|---|---|---|
| committer | Conor Dooley <conor.dooley@microchip.com> | 2023-04-03 20:25:46 +0200 |
| commit | b5984a9844fc45cd301a28fb56f3de95f7e20f3c (patch) | |
| tree | 0a3ee10b0acdc8f37ee7b3a6daee563465e81653 /drivers/mailbox | |
| parent | mailbox: mpfs: fix an incorrect mask width (diff) | |
| download | linux-b5984a9844fc45cd301a28fb56f3de95f7e20f3c.tar.xz linux-b5984a9844fc45cd301a28fb56f3de95f7e20f3c.zip | |
mailbox: mpfs: switch to txdone_poll
The system controller on PolarFire SoC has no interrupt to signify that
the TX has been completed. The interrupt instead signals that a service
requested by the mailbox client has succeeded. If a service fails, there
will be no interrupt delivered.
Switch to polling the busy register to determine whether transmission
has completed.
Fixes: 83d7b1560810 ("mbox: add polarfire soc system controller mailbox")
Acked-by: Jassi Brar <jaswinder.singh@linaro.org>
Tested-by: Valentina Fernandez <valentina.fernandezalanis@microchip.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Diffstat (limited to 'drivers/mailbox')
| -rw-r--r-- | drivers/mailbox/mailbox-mpfs.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/mailbox/mailbox-mpfs.c b/drivers/mailbox/mailbox-mpfs.c index d37560e91116..e0e825bdbad9 100644 --- a/drivers/mailbox/mailbox-mpfs.c +++ b/drivers/mailbox/mailbox-mpfs.c @@ -79,6 +79,13 @@ static bool mpfs_mbox_busy(struct mpfs_mbox *mbox) return status & SCB_STATUS_BUSY_MASK; } +static bool mpfs_mbox_last_tx_done(struct mbox_chan *chan) +{ + struct mpfs_mbox *mbox = (struct mpfs_mbox *)chan->con_priv; + + return !mpfs_mbox_busy(mbox); +} + static int mpfs_mbox_send_data(struct mbox_chan *chan, void *data) { struct mpfs_mbox *mbox = (struct mpfs_mbox *)chan->con_priv; @@ -183,7 +190,6 @@ static irqreturn_t mpfs_mbox_inbox_isr(int irq, void *data) mpfs_mbox_rx_data(chan); - mbox_chan_txdone(chan, 0); return IRQ_HANDLED; } @@ -213,6 +219,7 @@ static const struct mbox_chan_ops mpfs_mbox_ops = { .send_data = mpfs_mbox_send_data, .startup = mpfs_mbox_startup, .shutdown = mpfs_mbox_shutdown, + .last_tx_done = mpfs_mbox_last_tx_done, }; static int mpfs_mbox_probe(struct platform_device *pdev) @@ -248,7 +255,8 @@ static int mpfs_mbox_probe(struct platform_device *pdev) mbox->controller.num_chans = 1; mbox->controller.chans = mbox->chans; mbox->controller.ops = &mpfs_mbox_ops; - mbox->controller.txdone_irq = true; + mbox->controller.txdone_poll = true; + mbox->controller.txpoll_period = 10u; ret = devm_mbox_controller_register(&pdev->dev, &mbox->controller); if (ret) { |