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mfd: Use DIV_ROUND_CLOSEST for sm501 clock

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Use DIV_ROUND_CLOSEST to replace sm501fb_round_div function.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Axel Lin 2012-03-12 10:12:34 +08:00 committed by Samuel Ortiz
parent 1b1247dd75
commit 829ecbcb14
1 changed files with 1 additions and 9 deletions
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10
drivers/mfd/sm501.c
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@ -387,14 +387,6 @@ int sm501_unit_power(struct device *dev, unsigned int unit, unsigned int to)
EXPORT_SYMBOL_GPL(sm501_unit_power);
/* Perform a rounded division. */
static long sm501fb_round_div(long num, long denom)
{
/* n / d + 1 / 2 = (2n + d) / 2d */
return (2 * num + denom) / (2 * denom);
}
/* clock value structure. */
struct sm501_clock {
unsigned long mclk;
@ -428,7 +420,7 @@ static int sm501_calc_clock(unsigned long freq,
/* try all 8 shift values.*/
for (shift = 0; shift < 8; shift++) {
/* Calculate difference to requested clock */
diff = sm501fb_round_div(mclk, divider << shift) - freq;
diff = DIV_ROUND_CLOSEST(mclk, divider << shift) - freq;
if (diff < 0)
diff = -diff;