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authorOskar Schirmer <os@emlix.com>2009-06-11 14:55:22 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-11 08:51:09 -0700
commitd7f8d437bda0ec409e26cffb846bc28a40603ee3 (patch)
tree917e906bc45d2f08038f0dcba326b1dbb6c57320 /drivers/serial/imx.c
parentb6e4913834cd032082e5c76dfade61050212dc98 (diff)
downloadop-kernel-dev-d7f8d437bda0ec409e26cffb846bc28a40603ee3.zip
op-kernel-dev-d7f8d437bda0ec409e26cffb846bc28a40603ee3.tar.gz
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/imx.c')
-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 8c79e8c..7b5d1de 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;
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