[PATCH v2 4/9] serial: atmel: Use common rs485 device tree parsing function

[Uwe Kleine-König]

From: Sascha Hauer <s.hauer at pengutronix.de>

We just got a common helper for parsing the rs485 specific
device tree properties. Use it and drop the open coded parser.

Note that there is a small difference between the removed and the now
used implementation: The former cleared flags to 0 if rs485-rts-delay
was given, the common helper clears SER_RS485_RX_DURING_TX and
SER_RS485_ENABLED only but always which makes more sense.

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
[ukleinek: point out semantic change in commit log]
Signed-off-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
---
Changes since v1:
 - as I dropped my two atmel patches and used Alexandre Belloni's (that are
   already in next) instead, there are a few changes that are necessary to
   adapt to the new base.

 drivers/tty/serial/atmel_serial.c | 17 +----------------
 1 file changed, 1 insertion(+), 16 deletions(-)

diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index 937d67f22fba..357570a216ad 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -1689,22 +1689,7 @@ static void atmel_init_rs485(struct uart_port *port,
 {
 	struct device_node *np = pdev->dev.of_node;
 
-	struct serial_rs485 *rs485conf = &port->rs485;
-	u32 rs485_delay[2];
-
-	/* rs485 properties */
-	if (of_property_read_u32_array(np, "rs485-rts-delay",
-				       rs485_delay, 2) == 0) {
-		rs485conf->delay_rts_before_send = rs485_delay[0];
-		rs485conf->delay_rts_after_send = rs485_delay[1];
-		rs485conf->flags = 0;
-	}
-
-	if (of_get_property(np, "rs485-rx-during-tx", NULL))
-		rs485conf->flags |= SER_RS485_RX_DURING_TX;
-
-	if (of_get_property(np, "linux,rs485-enabled-at-boot-time", NULL))
-		rs485conf->flags |= SER_RS485_ENABLED;
+	of_get_rs485_mode(np, &port->rs485);
 }
 
 static void atmel_set_ops(struct uart_port *port)
-- 
2.11.0