From: Michal Simek Date: Mon, 3 Sep 2018 13:05:37 +0000 (+0200) Subject: serial: uartps: Enable automatic flow control X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=6ac1b91f346f7c489ef2a582b0c8c085fc51aabb;p=linux.git serial: uartps: Enable automatic flow control Enable automatic flow control which should ensure that there is no mainteinance in connection for zcu100 BT case. Signed-off-by: Michal Simek Acked-by: Nava kishore Manne Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index 0443edc1ad780..71c032744dae3 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -1006,13 +1006,12 @@ static void cdns_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) val = readl(port->membase + CDNS_UART_MODEMCR); mode_reg = readl(port->membase + CDNS_UART_MR); - val &= ~(CDNS_UART_MODEMCR_RTS | CDNS_UART_MODEMCR_DTR); + val &= ~(CDNS_UART_MODEMCR_RTS | CDNS_UART_MODEMCR_DTR | + CDNS_UART_MODEMCR_FCM); mode_reg &= ~CDNS_UART_MR_CHMODE_MASK; - if (mctrl & TIOCM_RTS) - val |= CDNS_UART_MODEMCR_RTS; - if (mctrl & TIOCM_DTR) - val |= CDNS_UART_MODEMCR_DTR; + if (mctrl & TIOCM_RTS || mctrl & TIOCM_DTR) + val |= CDNS_UART_MODEMCR_FCM; if (mctrl & TIOCM_LOOP) mode_reg |= CDNS_UART_MR_CHMODE_L_LOOP; else