tty/serial/8250: use mctrl_gpio helpers
This patch permits the usage for GPIOs to control the CTS/RTS/DTR/DSR/DCD/RI signals. Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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committed by
Greg Kroah-Hartman

parent
434be0ae7a
commit
4ef03d3287
@@ -134,18 +134,21 @@ static void omap8250_set_mctrl(struct uart_port *port, unsigned int mctrl)
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serial8250_do_set_mctrl(port, mctrl);
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/*
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* Turn off autoRTS if RTS is lowered and restore autoRTS setting
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* if RTS is raised
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*/
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lcr = serial_in(up, UART_LCR);
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serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);
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if ((mctrl & TIOCM_RTS) && (port->status & UPSTAT_AUTORTS))
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priv->efr |= UART_EFR_RTS;
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else
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priv->efr &= ~UART_EFR_RTS;
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serial_out(up, UART_EFR, priv->efr);
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serial_out(up, UART_LCR, lcr);
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if (IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(up->gpios,
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UART_GPIO_RTS))) {
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/*
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* Turn off autoRTS if RTS is lowered and restore autoRTS
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* setting if RTS is raised
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*/
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lcr = serial_in(up, UART_LCR);
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serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);
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if ((mctrl & TIOCM_RTS) && (port->status & UPSTAT_AUTORTS))
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priv->efr |= UART_EFR_RTS;
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else
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priv->efr &= ~UART_EFR_RTS;
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serial_out(up, UART_EFR, priv->efr);
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serial_out(up, UART_LCR, lcr);
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}
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}
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/*
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@@ -446,7 +449,9 @@ static void omap_8250_set_termios(struct uart_port *port,
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priv->efr = 0;
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up->port.status &= ~(UPSTAT_AUTOCTS | UPSTAT_AUTORTS | UPSTAT_AUTOXOFF);
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if (termios->c_cflag & CRTSCTS && up->port.flags & UPF_HARD_FLOW) {
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if (termios->c_cflag & CRTSCTS && up->port.flags & UPF_HARD_FLOW
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&& IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(up->gpios,
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UART_GPIO_RTS))) {
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/* Enable AUTOCTS (autoRTS is enabled when RTS is raised) */
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up->port.status |= UPSTAT_AUTOCTS | UPSTAT_AUTORTS;
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priv->efr |= UART_EFR_CTS;
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