On Tue, Dec 29, 2020 at 04:56:04PM +0800, zhangqiumi...@huawei.com wrote:
> From: zhangqiumiao <zhangqiumi...@huawei.com>
>
> make pl011 serial port support 485 mode full duplex communication
>
> Signed-off-by: zhangqiumiao <zhangqiumi...@huawei.com>
Can you please use your "real name" or one you sign documents with?
> ---
> drivers/tty/serial/amba-pl011.c | 38 +++++++++++++++++++++++++++++++++
> 1 file changed, 38 insertions(+)
>
> diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
> index c255476cce28..f6a7fe61e699 100644
> --- a/drivers/tty/serial/amba-pl011.c
> +++ b/drivers/tty/serial/amba-pl011.c
> @@ -44,6 +44,7 @@
>
> #include "amba-pl011.h"
>
> +#define ISEMPTY 1
> #define UART_NR 14
>
> #define SERIAL_AMBA_MAJOR 204
> @@ -1284,14 +1285,33 @@ static inline bool pl011_dma_rx_running(struct
> uart_amba_port *uap)
> #define pl011_dma_flush_buffer NULL
> #endif
>
> +static unsigned int pl011_tx_empty(struct uart_port *port);
> +
> static void pl011_stop_tx(struct uart_port *port)
> {
> + unsigned int cr;
> + unsigned int result;
> struct uart_amba_port *uap =
>
> uap->im &= ~UART011_TXIM;
> pl011_write(uap->im, uap, REG_IMSC);
> pl011_dma_tx_stop(uap);
> + if (port->rs485.flags & SER_RS485_ENABLEED) {
> + whiel(1) {
You obviously never built this code :(
