GitHub-Mirror/u-boot
2
0
Fork 0
mirror of https://github.com/Fishwaldo/u-boot.git synced 2025-03-18 21:21:37 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

serial: ns16550: use DIV_ROUND_CLOSEST macro to compute the divisor

Browse source 
The function still returns the same value.

The comment block is no longer necessary because our intention is
clear enough by using DIV_ROUND_CLOSEST() macro.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
This commit is contained in:
Masahiro Yamada 2014-07-11 20:29:03 +09:00 • committed by Tom Rini
parent 841977df21
commit f8c7c2033d
1 changed files with 3 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
drivers/serial/serial_ns16550.c
View file

@ -130,13 +130,9 @@ static int calc_divisor (NS16550_t port)
#endif #endif
#define MODE_X_DIV 16 #define MODE_X_DIV 16
/* Compute divisor value. Normally, we should simply return:
* CONFIG_SYS_NS16550_CLK) / MODE_X_DIV / gd->baudrate return DIV_ROUND_CLOSEST(CONFIG_SYS_NS16550_CLK,
* but we need to round that value by adding 0.5. MODE_X_DIV * gd->baudrate);
* Rounding is especially important at high baud rates.
*/
return (CONFIG_SYS_NS16550_CLK + (gd->baudrate * (MODE_X_DIV / 2))) /
(MODE_X_DIV * gd->baudrate);
} }
void void