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-rw-r--r--board/trab/tsc2000.c10
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;
}