serial: sh-sci: report CTS as active for get_mctrl
authorYoshii Takashi <takashi.yoshii.zj@renesas.com>
Tue, 23 Aug 2011 08:27:18 +0000 (08:27 +0000)
committerPaul Mundt <lethal@linux-sh.org>
Mon, 29 Aug 2011 06:47:33 +0000 (15:47 +0900)
sh-sci.c sets hardware up and then let the HW do all flow controls.
There is no software code, nor needs to get/set real CTS signal.

But, when turning CRTSCTS on through termios, uart_set_termios() in
serial_core.c checks CTS, and stops TX if it is inactive at the moment.

Because sci_get_mctrl() returns a fixed value DTR|RTS|DSR but CTS,
the sequence
  open -> set CRTSCTS -> write
hit the case and stop working, no more outputs.

This patch makes sci_get_mctrl() report CTS in addition.

Signed-off-by: Takashi YOSHII <takashi.yoshii.zj@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
drivers/tty/serial/sh-sci.c

index 18e6342..161e700 100644 (file)
@@ -1083,7 +1083,7 @@ static unsigned int sci_get_mctrl(struct uart_port *port)
        /* This routine is used for getting signals of: DTR, DCD, DSR, RI,
           and CTS/RTS */
 
-       return TIOCM_DTR | TIOCM_RTS | TIOCM_DSR;
+       return TIOCM_DTR | TIOCM_RTS | TIOCM_CTS | TIOCM_DSR;
 }
 
 #ifdef CONFIG_SERIAL_SH_SCI_DMA