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authorBen Dooks <ben@simtec.co.uk>2009-09-22 16:47:43 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-23 07:39:56 -0700
commit360fa58828784f307c3977d5ff4c8e400f074a56 (patch)
tree5909f2f112ca2d160cbf5f65ac6776e5f0fd84b5 /drivers/video
parent9a4a83d2ed83da0c4b45289ca72f10205aa96589 (diff)
s3c2410fb: fix clockrate calculation
In the final part of the calculation for the tft display clockrate we divide the output pf s3c2410fb_calc_pixclk() by 2 which leaves us with a rounding error if the result is odd. Change to using DIV_ROUND_UP() to ensure that we always choose a higher divisor and thus a lower frequency. Signed-off-by: Ben Dooks <ben@simtec.co.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/s3c2410fb.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/video/s3c2410fb.c b/drivers/video/s3c2410fb.c
index 5ffca2adc6a..aac661225c7 100644
--- a/drivers/video/s3c2410fb.c
+++ b/drivers/video/s3c2410fb.c
@@ -369,7 +369,9 @@ static void s3c2410fb_activate_var(struct fb_info *info)
void __iomem *regs = fbi->io;
int type = fbi->regs.lcdcon1 & S3C2410_LCDCON1_TFT;
struct fb_var_screeninfo *var = &info->var;
- int clkdiv = s3c2410fb_calc_pixclk(fbi, var->pixclock) / 2;
+ int clkdiv;
+
+ clkdiv = DIV_ROUND_UP(s3c2410fb_calc_pixclk(fbi, var->pixclock), 2);
dprintk("%s: var->xres = %d\n", __func__, var->xres);
dprintk("%s: var->yres = %d\n", __func__, var->yres);