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>
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@ -1835,9 +1835,9 @@ static unsigned int sci_get_mctrl(struct uart_port *port)
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{
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/*
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* CTS/RTS is handled in hardware when supported, while nothing
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* else is wired up. Keep it simple and simply assert DSR/CAR.
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* else is wired up. Keep it simple and simply assert CTS/DSR/CAR.
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*/
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return TIOCM_DSR | TIOCM_CAR;
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return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
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}
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static void sci_break_ctl(struct uart_port *port, int break_state)
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