serdev controllers may depend on other devices (such as multiplexers)
and thus require deferred probing support.
Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@xxxxxxxxx>
---
drivers/tty/serial/serial_core.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index f534a40..30a8997 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2785,6 +2785,10 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
uport->line, uport->dev, port, uport->tty_groups);
if (likely(!IS_ERR(tty_dev))) {
device_set_wakeup_capable(tty_dev, 1);
+ } else if (PTR_ERR(tty_dev) == -EPROBE_DEFER) {
+ ret = -EPROBE_DEFER;
+ state->uart_port = NULL;
+ goto out;
} else {
dev_err(uport->dev, "Cannot register tty device on line %d\n",
uport->line);
--
2.7.4
