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| author |   Geert Uytterhoeven <geert+renesas@glider.be> | 2016-06-03 12:00:03 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-25 09:07:51 -0700 |
| commit | 71e98e0e2aede08d6e0a0f3d94ea28b591ef4306 (patch) | |
| tree | 19937fc7db9dc3404fb900123ae3469fb5d5ceb3 /drivers/tty/serial/sh-sci.c | |
| parent | serial: sh-sci: Update DT binding documentation for dedicated RTS/CTS (diff) | |
| download | linux-dev-71e98e0e2aede08d6e0a0f3d94ea28b591ef4306.tar.xz linux-dev-71e98e0e2aede08d6e0a0f3d94ea28b591ef4306.zip | |
serial: sh-sci: Always set TIOCM_CTS in .get_mctrl() callback
Documentation/serial/driver clearly states:
If the port does not support CTS, DCD or DSR, the driver should
indicate that the signal is permanently active.
Hence always set TIOCM_CTS, as we currently don't look at the CTS
hardware line state at all.
FWIW, this fixes the transmit path when hardware-assisted flow control
is enabled, and userspace enables CRTSCTS.
The receive path is still broken, as RTS is never asserted.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/sh-sci.c')
| -rw-r--r-- | drivers/tty/serial/sh-sci.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 0130feb069ae..135f836642ab 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1835,9 +1835,9 @@ 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. + * else is wired up. Keep it simple and simply assert CTS/DSR/CAR. */ - return TIOCM_DSR | TIOCM_CAR; + return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; } static void sci_break_ctl(struct uart_port *port, int break_state) |