diff options
| -rw-r--r-- | drivers/tty/serial/fsl_lpuart.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 68200cad1266..3971bc0b0231 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -480,6 +480,8 @@ static int lpuart_dma_tx_request(struct uart_port *port) static void lpuart_flush_buffer(struct uart_port *port) { struct lpuart_port *sport = container_of(port, struct lpuart_port, port); + u32 val; + if (sport->lpuart_dma_tx_use) { if (sport->dma_tx_in_progress) { dma_unmap_sg(sport->port.dev, &sport->tx_sgl[0], @@ -488,6 +490,16 @@ static void lpuart_flush_buffer(struct uart_port *port) } dmaengine_terminate_all(sport->dma_tx_chan); } + + if (sport->lpuart32) { + val = lpuart32_read(sport->port.membase + UARTFIFO); + val |= UARTFIFO_TXFLUSH | UARTFIFO_RXFLUSH; + lpuart32_write(val, sport->port.membase + UARTFIFO); + } else { + val = readb(sport->port.membase + UARTPFIFO); + val |= UARTCFIFO_TXFLUSH | UARTCFIFO_RXFLUSH; + writeb(val, sport->port.membase + UARTCFIFO); + } } static inline void lpuart_transmit_buffer(struct lpuart_port *sport) |