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authorMaarten Brock <m.brock@vanmierlo.com>2019-11-25 18:45:30 +0530
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-01-14 14:34:04 +0100
commit6d8bf787a6ad04442307088e1a5352ee448cab45 (patch)
treed4294c9ecf8476a53d88949aef7f495450b3fa7f /drivers/tty
parent422c6d3b09afb187b5aeedc3a99d759703023be0 (diff)
downloadlinux-6d8bf787a6ad04442307088e1a5352ee448cab45.tar.bz2
serial: xilinx_uartps: set_termios sets flowcontrol
Let set_termios enable/disable automatic flow control. set_mctrl should not touch automatic flow control. Signed-off-by: Maarten Brock <m.brock@vanmierlo.com> Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Link: https://lore.kernel.org/r/1574687731-21563-2-git-send-email-shubhrajyoti.datta@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/xilinx_uartps.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index f33b89587786..958c3b4712fb 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -690,7 +690,7 @@ static void cdns_uart_break_ctl(struct uart_port *port, int ctl)
static void cdns_uart_set_termios(struct uart_port *port,
struct ktermios *termios, struct ktermios *old)
{
- unsigned int cval = 0;
+ u32 cval = 0;
unsigned int baud, minbaud, maxbaud;
unsigned long flags;
unsigned int ctrl_reg, mode_reg, val;
@@ -811,6 +811,13 @@ static void cdns_uart_set_termios(struct uart_port *port,
cval |= mode_reg & 1;
writel(cval, port->membase + CDNS_UART_MR);
+ cval = readl(port->membase + CDNS_UART_MODEMCR);
+ if (termios->c_cflag & CRTSCTS)
+ cval |= CDNS_UART_MODEMCR_FCM;
+ else
+ cval &= ~CDNS_UART_MODEMCR_FCM;
+ writel(cval, port->membase + CDNS_UART_MODEMCR);
+
spin_unlock_irqrestore(&port->lock, flags);
}
@@ -1045,12 +1052,9 @@ 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 |
- CDNS_UART_MODEMCR_FCM);
+ val &= ~(CDNS_UART_MODEMCR_RTS | CDNS_UART_MODEMCR_DTR);
mode_reg &= ~CDNS_UART_MR_CHMODE_MASK;
- 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