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sh: clkfwk: add clk_rate_mult_range_round()

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This provides a clk_rate_mult_range_round() helper for use by some of the
CPG PLL ranged multipliers, following the same approach as used by the
div ranges.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Kuninori Morimoto 2011-09-19 18:51:13 -07:00 committed by Paul Mundt
parent 1a67a573b8
commit dd2c0ca1b1
2 changed files with 23 additions and 0 deletions
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20
drivers/sh/clk/core.c
View File

@ -173,6 +173,26 @@ long clk_rate_div_range_round(struct clk *clk, unsigned int div_min,
return clk_rate_round_helper(&div_range_round);
}
static long clk_rate_mult_range_iter(unsigned int pos,
struct clk_rate_round_data *rounder)
{
return clk_get_rate(rounder->arg) * pos;
}
long clk_rate_mult_range_round(struct clk *clk, unsigned int mult_min,
unsigned int mult_max, unsigned long rate)
{
struct clk_rate_round_data mult_range_round = {
.min = mult_min,
.max = mult_max,
.func = clk_rate_mult_range_iter,
.arg = clk_get_parent(clk),
.rate = rate,
};
return clk_rate_round_helper(&mult_range_round);
}
int clk_rate_table_find(struct clk *clk,
struct cpufreq_frequency_table *freq_table,
unsigned long rate)

3
include/linux/sh_clk.h
View File

@ -94,6 +94,9 @@ int clk_rate_table_find(struct clk *clk,
long clk_rate_div_range_round(struct clk *clk, unsigned int div_min,
unsigned int div_max, unsigned long rate);
long clk_rate_mult_range_round(struct clk *clk, unsigned int mult_min,
unsigned int mult_max, unsigned long rate);
long clk_round_parent(struct clk *clk, unsigned long target,
unsigned long *best_freq, unsigned long *parent_freq,
unsigned int div_min, unsigned int div_max);