diff options
Diffstat (limited to 'board/trab/tsc2000.c')
| -rw-r--r-- | board/trab/tsc2000.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/board/trab/tsc2000.c b/board/trab/tsc2000.c index 382a85b..f13a5a9 100644 --- a/board/trab/tsc2000.c +++ b/board/trab/tsc2000.c @@ -27,6 +27,7 @@ #include <common.h> #include <s3c2400.h> +#include <div64.h> #include "tsc2000.h" #include "Pt1000_temp_data.h" @@ -332,6 +333,7 @@ void tsc2000_reg_init (void) int tsc2000_interpolate(long value, long data[][2], long *result) { int i; + unsigned long long val; /* the data is sorted and the first element is upper * limit so we can easily check for out-of-band values @@ -347,10 +349,10 @@ int tsc2000_interpolate(long value, long data[][2], long *result) result in 'long long'. */ - *result = data[i-1][1] + - ((unsigned long long)(data[i][1] - data[i-1][1]) - * (unsigned long long)(value - data[i-1][0])) - / (data[i][0] - data[i-1][0]); + val = ((unsigned long long)(data[i][1] - data[i-1][1]) + * (unsigned long long)(value - data[i-1][0])); + do_div(val, (data[i][0] - data[i-1][0])); + *result = data[i-1][1] + val; return 0; } |