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serial: sh-sci: report CTS as active for get_mctrl 

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>
This commit is contained in:
Yoshii Takashi 2011-08-23 08:27:18 +00:00 committed by Paul Mundt
parent 34f7145a63
commit 4480a688b2
1 changed files with 1 additions and 1 deletions
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2
drivers/tty/serial/sh-sci.c
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@ -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