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authorOskar Schirmer <os@emlix.com>2009-06-11 17:55:22 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-11 19:51:09 +0400
commitd7f8d437bda0ec409e26cffb846bc28a40603ee3 (patch)
tree917e906bc45d2f08038f0dcba326b1dbb6c57320 /drivers/serial
parentb6e4913834cd032082e5c76dfade61050212dc98 (diff)
downloadlinux-d7f8d437bda0ec409e26cffb846bc28a40603ee3.tar.xz
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: Oskar Schirmer <os@emlix.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/serial')
-rw-r--r--drivers/serial/imx.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c
index 8c79e8c2fd4e..7b5d1de9cfe3 100644
--- a/drivers/serial/imx.c
+++ b/drivers/serial/imx.c
@@ -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;