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Commit b48dc711 authored by Sonic Zhang's avatar Sonic Zhang Committed by Greg Kroah-Hartman
Browse files

serial: bfin-uart: Enable hardware automatic CTS only when CTS pin is available. 



Signed-off-by: default avatarSonic Zhang <sonic.zhang@analog.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 5c2f37dd

drivers/tty/serial/bfin_uart.c

+10 −9
Original line number Original line Diff line number Diff line
@@ -726,16 +726,17 @@ static int bfin_serial_startup(struct uart_port *port) 
	}

	}

#endif

#endif

#ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS

#ifdef CONFIG_SERIAL_BFIN_HARD_CTSRTS

	if (uart->cts_pin >= 0 && request_irq(uart->status_irq,

	if (uart->cts_pin >= 0) {

		bfin_serial_mctrl_cts_int,

		if (request_irq(uart->status_irq, bfin_serial_mctrl_cts_int,

		0, "BFIN_UART_MODEM_STATUS", uart)) {

			IRQF_DISABLED, "BFIN_UART_MODEM_STATUS", uart)) {

			uart->cts_pin = -1;

			uart->cts_pin = -1;

		pr_info("Unable to attach BlackFin UART Modem Status interrupt.\n");

			dev_info(port->dev, "Unable to attach BlackFin UART Modem Status interrupt.\n");

		}

		}





		/* CTS RTS PINs are negative assertive. */

		/* CTS RTS PINs are negative assertive. */

		UART_PUT_MCR(uart, ACTS);

		UART_PUT_MCR(uart, ACTS);

		UART_SET_IER(uart, EDSSI);

		UART_SET_IER(uart, EDSSI);

	}

#endif

#endif





	UART_SET_IER(uart, ERBFI);

	UART_SET_IER(uart, ERBFI);