diff mbox series

[v3,5/5] tty: serial: sh-sci: Fix end of transmission on SCI

Message ID 20230331113346.170602-6-biju.das.jz@bp.renesas.com
State Superseded
Headers show
Series Add RZ/G2L SCIFA DMAC/ SCI TX support | expand

Commit Message

Biju Das March 31, 2023, 11:33 a.m. UTC 
We need to set TE to "0" (i.e., disable serial transmission) to
get the behavior of the end of serial transmission as expected.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
---
v3:
 New patch. split from patch#3.
---
 drivers/tty/serial/sh-sci.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 5c9ae69c0555..7c9457962a3d 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -847,6 +847,11 @@  static void sci_transmit_chars(struct uart_port *port)
 		} else if (!uart_circ_empty(xmit) && !stopped) {
 			c = xmit->buf[xmit->tail];
 			xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
+		} else if (port->type == PORT_SCI && uart_circ_empty(xmit)) {
+			ctrl = serial_port_in(port, SCSCR);
+			ctrl &= ~SCSCR_TE;
+			serial_port_out(port, SCSCR, ctrl);
+			return;
 		} else {
 			break;
 		}