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authorBiju Das <biju.das.jz@bp.renesas.com>2023-04-12 17:50:53 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2023-04-20 14:47:33 +0300
commitf06c2a9000ebecbb461196e59ce063f742272902 (patch)
tree2776e87cb563c35e161db7e0e2e68b8944360de9 /drivers/tty
parentd61ae331d6f35183b38e0c992bc01bf15d8591c3 (diff)
downloadlinux-f06c2a9000ebecbb461196e59ce063f742272902.tar.xz
tty: serial: sh-sci: Fix end of transmission on SCI
We need to set TE to "0" (i.e., disable serial transmission) to get the expected behavior of the end of serial transmission. Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Link: https://lore.kernel.org/r/20230412145053.114847-6-biju.das.jz@bp.renesas.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/sh-sci.c5
1 files changed, 5 insertions, 0 deletions
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;
}