Commit d7f8d437 authored by Oskar Schirmer's avatar Oskar Schirmer Committed by Linus Torvalds

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
...@@ -818,6 +818,7 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios, ...@@ -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 old_csize = old ? old->c_cflag & CSIZE : CS8;
unsigned int div, ufcr; unsigned int div, ufcr;
unsigned long num, denom; unsigned long num, denom;
uint64_t tdiv64;
/* /*
* If we don't support modem control lines, don't allow * 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, ...@@ -930,6 +931,12 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios,
rational_best_approximation(16 * div * baud, sport->port.uartclk, rational_best_approximation(16 * div * baud, sport->port.uartclk,
1 << 16, 1 << 16, &num, &denom); 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; num -= 1;
denom -= 1; denom -= 1;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment