[PATCH] serial: uartps: Enable automatic flow control
From: Michal Simek <hidden>
Date: 2018-09-03 13:05:51
Also in:
linux-serial, lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
Enable automatic flow control which should ensure that there is no mainteinance in connection for zcu100 BT case. Signed-off-by: Michal Simek <redacted> Acked-by: Nava kishore Manne <redacted> --- drivers/tty/serial/xilinx_uartps.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index a48f19b1b88f..e5d90611c03f 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c@@ -1003,13 +1003,12 @@ 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
--
1.9.1