sc16is7xx: implemented get_mctrl
Add support for manual getting the modem control lines. Signed-off-by: Maarten Brock <m.brock@vanmierlo.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -822,10 +822,16 @@ static unsigned int sc16is7xx_tx_empty(struct uart_port *port)
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static unsigned int sc16is7xx_get_mctrl(struct uart_port *port)
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{
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/* DCD and DSR are not wired and CTS/RTS is handled automatically
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* so just indicate DSR and CAR asserted
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*/
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return TIOCM_DSR | TIOCM_CAR;
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unsigned int msr;
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unsigned int ret = 0;
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msr = sc16is7xx_port_read(port, SC16IS7XX_MSR_REG);
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ret |= (msr & SC16IS7XX_MSR_CTS_BIT) ? TIOCM_CTS : 0;
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ret |= (msr & SC16IS7XX_MSR_DSR_BIT) ? TIOCM_DSR : 0;
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ret |= (msr & SC16IS7XX_MSR_RI_BIT) ? TIOCM_RNG : 0;
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ret |= (msr & SC16IS7XX_MSR_CD_BIT) ? TIOCM_CAR : 0;
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return ret;
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}
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static void sc16is7xx_set_mctrl(struct uart_port *port, unsigned int mctrl)
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