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 --- 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)