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| author | Matthias Kaehlcke <matthias@kaehlcke.net> | 2010-02-24 00:22:00 +0100 |
|---|---|---|
| committer | Tom Rix <Tom.Rix@windriver.com> | 2010-03-07 12:36:35 -0600 |
| commit | d9f505e3cddbb7afce26dcfe0fd19b207ee57c09 (patch) | |
| tree | 288d69c21bad9dc2c86d79a02d684d280a27fce7 /cpu | |
| parent | 041d42e789aba20296ffcde92173f100a9592880 (diff) | |
| download | u-boot-d9f505e3cddbb7afce26dcfe0fd19b207ee57c09.zip u-boot-d9f505e3cddbb7afce26dcfe0fd19b207ee57c09.tar.gz u-boot-d9f505e3cddbb7afce26dcfe0fd19b207ee57c09.tar.bz2 | |
ep93xx: Fix calculation of sys ticks in clk_to_systicks()
ep93xx: Use unsigned long long for calculation of sys ticks in clk_to_systicks()
for proper handling of large intermediate values
Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Diffstat (limited to 'cpu')
| -rw-r--r-- | cpu/arm920t/ep93xx/timer.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/cpu/arm920t/ep93xx/timer.c b/cpu/arm920t/ep93xx/timer.c index 6d969d9..98c759c 100644 --- a/cpu/arm920t/ep93xx/timer.c +++ b/cpu/arm920t/ep93xx/timer.c @@ -31,6 +31,7 @@ #include <linux/types.h> #include <asm/arch/ep93xx.h> #include <asm/io.h> +#include <div64.h> #define TIMER_CLKSEL (1 << 3) #define TIMER_MODE (1 << 6) @@ -44,9 +45,10 @@ static ulong lastdec; static inline unsigned long clk_to_systicks(unsigned long clk_ticks) { - unsigned long sys_ticks = (clk_ticks * CONFIG_SYS_HZ) / TIMER_FREQ; + unsigned long long sys_ticks = (clk_ticks * CONFIG_SYS_HZ); + do_div(sys_ticks, TIMER_FREQ); - return sys_ticks; + return (unsigned long)sys_ticks; } static inline unsigned long usecs_to_ticks(unsigned long usecs) |