diff options
Diffstat (limited to 'drivers/tty/serial/ar933x_uart.c')
| -rw-r--r-- | drivers/tty/serial/ar933x_uart.c | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c index 6269dbf93546..32caeac12985 100644 --- a/drivers/tty/serial/ar933x_uart.c +++ b/drivers/tty/serial/ar933x_uart.c @@ -580,18 +580,9 @@ static const struct uart_ops ar933x_uart_ops = { .verify_port = ar933x_uart_verify_port, }; -static int ar933x_config_rs485(struct uart_port *port, +static int ar933x_config_rs485(struct uart_port *port, struct ktermios *termios, struct serial_rs485 *rs485conf) { - struct ar933x_uart_port *up = - container_of(port, struct ar933x_uart_port, port); - - if ((rs485conf->flags & SER_RS485_ENABLED) && - !up->rts_gpiod) { - dev_err(port->dev, "RS485 needs rts-gpio\n"); - return 1; - } - port->rs485 = *rs485conf; return 0; } @@ -702,6 +693,11 @@ static struct uart_driver ar933x_uart_driver = { .cons = NULL, /* filled in runtime */ }; +static const struct serial_rs485 ar933x_no_rs485 = {}; +static const struct serial_rs485 ar933x_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | SER_RS485_RTS_AFTER_SEND, +}; + static int ar933x_uart_probe(struct platform_device *pdev) { struct ar933x_uart_port *up; @@ -773,6 +769,7 @@ static int ar933x_uart_probe(struct platform_device *pdev) port->fifosize = AR933X_UART_FIFO_SIZE; port->ops = &ar933x_uart_ops; port->rs485_config = ar933x_config_rs485; + port->rs485_supported = ar933x_rs485_supported; baud = ar933x_uart_get_baud(port->uartclk, AR933X_UART_MAX_SCALE, 1); up->min_baud = max_t(unsigned int, baud, AR933X_UART_MIN_BAUD); @@ -792,10 +789,12 @@ static int ar933x_uart_probe(struct platform_device *pdev) up->rts_gpiod = mctrl_gpio_to_gpiod(up->gpios, UART_GPIO_RTS); - if ((port->rs485.flags & SER_RS485_ENABLED) && - !up->rts_gpiod) { - dev_err(&pdev->dev, "lacking rts-gpio, disabling RS485\n"); - port->rs485.flags &= ~SER_RS485_ENABLED; + if (!up->rts_gpiod) { + port->rs485_supported = ar933x_no_rs485; + if (port->rs485.flags & SER_RS485_ENABLED) { + dev_err(&pdev->dev, "lacking rts-gpio, disabling RS485\n"); + port->rs485.flags &= ~SER_RS485_ENABLED; + } } #ifdef CONFIG_SERIAL_AR933X_CONSOLE |