From: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx>
If the gpio is not yet available we better also
defer the probing in the rs485 case.
Signed-off-by: Michael Grzeschik <m.grzeschik@xxxxxxxxxxxxxx>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
---
drivers/tty/serial/omap-serial.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index fa511ebab67c..2116e76b9559 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -1604,8 +1604,11 @@ static int serial_omap_probe_rs485(struct uart_omap_port *up,
flags & SER_RS485_RTS_AFTER_SEND);
if (ret < 0)
return ret;
- } else
+ } else if (up->rts_gpio == -EPROBE_DEFER) {
+ return -EPROBE_DEFER;
+ } else {
up->rts_gpio = -EINVAL;
+ }
if (of_property_read_u32_array(np, "rs485-rts-delay",
rs485_delay, 2) == 0) {
--
1.8.5.3
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