Commit d7f8d437 authored by Oskar Schirmer's avatar Oskar Schirmer Committed by Linus Torvalds
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imx: serial: use tty_encode_baud_rate to set true rate 



real baud rate may be different from the one requested.
for upper layers, set the nearest value to the real rate
in favour of the rate previously requested.

Signed-off-by: default avatarOskar Schirmer <os@emlix.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent b6e49138

drivers/serial/imx.c

+7 −0
Original line number Diff line number Diff line
@@ -818,6 +818,7 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios, 
	unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8;

	unsigned int div, ufcr;

	unsigned long num, denom;

	uint64_t tdiv64;



	/*

	 * If we don't support modem control lines, don't allow
@@ -930,6 +931,12 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios, 
	rational_best_approximation(16 * div * baud, sport->port.uartclk,

		1 << 16, 1 << 16, &num, &denom);



	tdiv64 = sport->port.uartclk;

	tdiv64 *= num;

	do_div(tdiv64, denom * 16 * div);

	tty_encode_baud_rate(sport->port.info->port.tty,

		(speed_t)tdiv64, (speed_t)tdiv64);



	num -= 1;

	denom -= 1;