cirrusfb: simplify clock calculation
Simplify clock calculation.
Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/video/cirrusfb.c b/drivers/video/cirrusfb.c
index 09f4214..dfd12a2 100644
--- a/drivers/video/cirrusfb.c
+++ b/drivers/video/cirrusfb.c
@@ -3075,38 +3075,36 @@
f = freq * 10;
for (n = 32; n < 128; n++) {
+ int s = 0;
+
d = (143181 * n) / f;
if ((d >= 7) && (d <= 63)) {
- if (d > 31)
- d = (d / 2) * 2;
- h = (14318 * n) / d;
+ int temp = d;
+
+ if (temp > 31) {
+ s = 1;
+ temp >>= 1;
+ }
+ h = ((14318 * n) / temp) >> s;
if (abs(h - freq) < abs(*best - freq)) {
*best = h;
*nom = n;
- if (d < 32) {
- *den = d;
- *div = 0;
- } else {
- *den = d / 2;
- *div = 1;
- }
+ *den = temp;
+ *div = s;
}
}
- d = DIV_ROUND_UP(143181 * n, f);
+ d++;
if ((d >= 7) && (d <= 63)) {
- if (d > 31)
- d = (d / 2) * 2;
- h = (14318 * n) / d;
+ if (d > 31) {
+ s = 1;
+ d >>= 1;
+ }
+ h = ((14318 * n) / d) >> s;
if (abs(h - freq) < abs(*best - freq)) {
*best = h;
*nom = n;
- if (d < 32) {
- *den = d;
- *div = 0;
- } else {
- *den = d / 2;
- *div = 1;
- }
+ *den = d;
+ *div = s;
}
}
}