From: Hisashi Nakamura <hisashi.nakamura.ak@xxxxxxxxxxx> TIOCM_CTS is enabled to use hardware flow control of HSCIF. And hardware flow control of HSCIF is handled by device tree. Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@xxxxxxxxxxx> Signed-off-by: Yoshihiro Kaneko <ykaneko0929@xxxxxxxxx> --- This patch is based on the tty-next branch of Greg Kroah-Hartman's tty tree. drivers/tty/serial/sh-sci.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index bcec10a..6744702 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1216,7 +1216,11 @@ static unsigned int sci_get_mctrl(struct uart_port *port) * CTS/RTS is handled in hardware when supported, while nothing * else is wired up. Keep it simple and simply assert DSR/CAR. */ - return TIOCM_DSR | TIOCM_CAR; + unsigned int mctrl = TIOCM_DSR | TIOCM_CAR; + + if (port->type == PORT_HSCIF) + mctrl |= TIOCM_CTS; + return mctrl; } #ifdef CONFIG_SERIAL_SH_SCI_DMA @@ -2611,6 +2615,8 @@ sci_parse_dt(struct platform_device *pdev, unsigned int *dev_id) p->type = info->type; p->regtype = info->regtype; p->scscr = SCSCR_RE | SCSCR_TE; + if (of_property_read_bool(np, "ctsrts")) + p->capabilities = SCIx_HAVE_RTSCTS; return p; } -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
