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serial: sh-sci: Take into account sampling rate for max baud rate 

The maximum baud rate depends on the sampling rate.
HSCIF has a variable sampling rate and sets s->sampling_rate to zero,
hence use the minimum sampling rate of 8.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Geert Uytterhoeven 2015-11-19 14:35:09 +01:00
parent b4a5c45908
commit ff8b275f1f
1 changed files with 4 additions and 1 deletions
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5
drivers/tty/serial/sh-sci.c
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@ -1975,7 +1975,10 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
* that the previous boot loader has enabled required clocks and
* setup the baud rate generator hardware for us already.
*/
max_baud = port->uartclk ? port->uartclk / 16 : 115200;
if (port->uartclk)
max_baud = port->uartclk / max(s->sampling_rate, 8U);
else
max_baud = 115200;
baud = uart_get_baud_rate(port, termios, old, 0, max_baud);
if (likely(baud && port->uartclk))