diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/fsl_lpuart.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 63f99a0b533f..eac35d4aa4c7 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -2222,6 +2222,24 @@ static int lpuart_probe(struct platform_device *pdev) return ret; } + of_get_rs485_mode(np, &sport->port.rs485); + + if (sport->port.rs485.flags & SER_RS485_RX_DURING_TX) { + dev_err(&pdev->dev, "driver doesn't support RX during TX\n"); + return -ENOSYS; + } + + if (sport->port.rs485.delay_rts_before_send || + sport->port.rs485.delay_rts_after_send) { + dev_err(&pdev->dev, "driver doesn't support RTS delays\n"); + return -ENOSYS; + } + + if (sport->port.rs485.flags & SER_RS485_ENABLED) { + sport->port.rs485.flags |= SER_RS485_RTS_ON_SEND; + writeb(UARTMODEM_TXRTSE, sport->port.membase + UARTMODEM); + } + sport->dma_tx_chan = dma_request_slave_channel(sport->port.dev, "tx"); if (!sport->dma_tx_chan) dev_info(sport->port.dev, "DMA tx channel request failed, " @@ -2232,12 +2250,6 @@ static int lpuart_probe(struct platform_device *pdev) dev_info(sport->port.dev, "DMA rx channel request failed, " "operating without rx DMA\n"); - if (of_property_read_bool(np, "linux,rs485-enabled-at-boot-time")) { - sport->port.rs485.flags |= SER_RS485_ENABLED; - sport->port.rs485.flags |= SER_RS485_RTS_ON_SEND; - writeb(UARTMODEM_TXRTSE, sport->port.membase + UARTMODEM); - } - return 0; } |