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sh: Support rate rounding for SH7722 FRQCR clocks.

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Now that the round_rate() op is supported, hook it up on SH7722
for the FRQCR (CPU, PCLK, etc.) clocks.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2007-07-20 13:30:07 +09:00
parent f6991b0456
commit fe04d7798f
1 changed files with 15 additions and 0 deletions
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15
arch/sh/kernel/cpu/sh4a/clock-sh7722.c
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@ -387,9 +387,24 @@ out_err:
return err;
}
static long sh7722_frqcr_round_rate(struct clk *clk, unsigned long rate)
{
unsigned long parent_rate = clk->parent->rate;
int div;
/* look for multiplier/divisor pair */
div = sh7722_find_divisors(parent_rate, rate);
if (div < 0)
return clk->rate;
/* calculate new value of clock rate */
return parent_rate * 2 / div;
}
static struct clk_ops sh7722_frqcr_clk_ops = {
.recalc = sh7722_frqcr_recalc,
.set_rate = sh7722_frqcr_set_rate,
.round_rate = sh7722_frqcr_round_rate,
};
/*