From: Geert Uytterhoeven Date: Thu, 19 Nov 2015 13:35:09 +0000 (+0100) Subject: serial: sh-sci: Take into account sampling rate for max baud rate X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=ff8b275f1f0927621cf543c2a6f02761052c360d;p=deliverable%2Flinux.git 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 Reviewed-by: Laurent Pinchart Acked-by: Greg Kroah-Hartman --- diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index d89d4b7576cf..5b120757c02a 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -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))