lkml.org 
[lkml]   [2019]   [Feb]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH AUTOSEL 4.20 45/77] serial: fsl_lpuart: fix maximum acceptable baud rate with over-sampling
    Date
    From: Tomonori Sakita <tomonori.sakita@sord.co.jp>

    [ Upstream commit 815d835b7ba46685c316b000013367dacb2b461b ]

    Using over-sampling ratio, lpuart can accept baud rate upto uartclk / 4.

    Signed-off-by: Tomonori Sakita <tomonori.sakita@sord.co.jp>
    Signed-off-by: Atsushi Nemoto <atsushi.nemoto@sord.co.jp>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/tty/serial/fsl_lpuart.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
    index 00c220e4f43c..989b95af1b95 100644
    --- a/drivers/tty/serial/fsl_lpuart.c
    +++ b/drivers/tty/serial/fsl_lpuart.c
    @@ -1693,7 +1693,7 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios,
    }

    /* ask the core to calculate the divisor */
    - baud = uart_get_baud_rate(port, termios, old, 50, port->uartclk / 16);
    + baud = uart_get_baud_rate(port, termios, old, 50, port->uartclk / 4);

    spin_lock_irqsave(&sport->port.lock, flags);

    --
    2.19.1
    \
     
     \ /
      Last update: 2019-02-15 03:40    [W:4.087 / U:0.036 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site