queue-4.4/serial-fsl_lpuart-fix-maximum-acceptable-baud-rate-w.patch

   1 From 70fdf74a8c3adc4e877a59284ecd9dd6cb640ae3 Mon Sep 17 00:00:00 2001
   2 From: Tomonori Sakita <tomonori.sakita@sord.co.jp>
   3 Date: Mon, 21 Jan 2019 17:34:16 +0900
   4 Subject: serial: fsl_lpuart: fix maximum acceptable baud rate with
   5  over-sampling
   6
   7 [ Upstream commit 815d835b7ba46685c316b000013367dacb2b461b ]
   8
   9 Using over-sampling ratio, lpuart can accept baud rate upto uartclk / 4.
  10
  11 Signed-off-by: Tomonori Sakita <tomonori.sakita@sord.co.jp>
  12 Signed-off-by: Atsushi Nemoto <atsushi.nemoto@sord.co.jp>
  13 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  14 Signed-off-by: Sasha Levin <sashal@kernel.org>
  15 ---
  16  drivers/tty/serial/fsl_lpuart.c | 2 +-
  17  1 file changed, 1 insertion(+), 1 deletion(-)
  18
  19 diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
  20 index 8b5ec9386f0f4..1544a7cc76ff8 100644
  21 --- a/drivers/tty/serial/fsl_lpuart.c
  22 +++ b/drivers/tty/serial/fsl_lpuart.c
  23 @@ -1409,7 +1409,7 @@ lpuart32_set_termios(struct uart_port *port, struct ktermios *termios,
  24         }
  25
  26         /* ask the core to calculate the divisor */
  27 -       baud = uart_get_baud_rate(port, termios, old, 50, port->uartclk / 16);
  28 +       baud = uart_get_baud_rate(port, termios, old, 50, port->uartclk / 4);
  29
  30         spin_lock_irqsave(&sport->port.lock, flags);
  31
  32 --
  33 2.19.1
  34