[PATCH 05/05] serial: sh-sci: Expose SCIFA/SCIFB CTS pin

[Magnus Damm <magnus.damm@gmail.com>]

From: Magnus Damm <damm+renesas@opensource.se>

Expose CTS pin to serial core for the SCIFA/SCIFB case.

Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
---

 drivers/tty/serial/sh-sci.c |   17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

--- 0023/drivers/tty/serial/sh-sci.c
+++ work/drivers/tty/serial/sh-sci.c	2014-12-17 18:46:44.000000000 +0900
@@ -564,6 +564,11 @@ static void sci_init_pins_default(struct
 	serial_port_out(port, SCSPTR, status); /* Set RTS = 1 */
 }
 
+static bool sci_cts_asserted_scifab(struct uart_port *port)
+{
+	return !(serial_port_in(port, SCPDR) & BIT(3));
+}
+
 static void sci_init_pins_scifab(struct uart_port *port, bool hwflow_enabled)
 {
 	unsigned short control, data;
@@ -1304,8 +1309,16 @@ static unsigned int sci_get_mctrl(struct
 	 * else is wired up. Keep it simple and simply assert DSR/CAR.
 	 */
 
-	if (s->cfg->capabilities & SCIx_HAVE_RTSCTS)
-		cts_asserted = sci_cts_asserted_default(port);
+ 	if (s->cfg->capabilities & SCIx_HAVE_RTSCTS) {
+		switch (s->cfg->type) {
+		case PORT_SCIFA:
+		case PORT_SCIFB:
+			cts_asserted = sci_cts_asserted_scifab(port);
+			break;
+		default:
+			cts_asserted = sci_cts_asserted_default(port);
+		}
+ 	}
 
 	return TIOCM_DSR | TIOCM_CAR | (cts_asserted ? TIOCM_CTS : 0);
 }