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authorMagnus Damm <damm@igel.co.jp>2009-05-25 08:10:36 +0000
committerPaul Mundt <lethal@linux-sh.org>2009-05-26 17:08:42 +0900
commitdf109e630f82de63ec82eebbfec2a57852517f28 (patch)
tree5b181c7bb7cfc2b3ab408f95d2f6f124ae1cd07b /arch/sh/kernel/cpu/sh4a/clock-sh7785.c
parentc94a85746f7bdc13035acdf88c130d7b6fa41bde (diff)
downloadblackbird-op-linux-df109e630f82de63ec82eebbfec2a57852517f28.tar.gz
blackbird-op-linux-df109e630f82de63ec82eebbfec2a57852517f28.zip
sh: use shared frequency tables on sh7785
This patch converts the sh7785 clock code to make use of clk_rate_table_build() and clk_rate_table_round(). The ->build_rate_table() callback is removed, the table building is instead handled in ->recalc(). Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/cpu/sh4a/clock-sh7785.c')
-rw-r--r--arch/sh/kernel/cpu/sh4a/clock-sh7785.c77
1 files changed, 12 insertions, 65 deletions
diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7785.c b/arch/sh/kernel/cpu/sh4a/clock-sh7785.c
index 7021ab0bfb88..a4a9bcbec664 100644
--- a/arch/sh/kernel/cpu/sh4a/clock-sh7785.c
+++ b/arch/sh/kernel/cpu/sh4a/clock-sh7785.c
@@ -19,6 +19,12 @@
static unsigned int div2[] = { 1, 2, 4, 6, 8, 12, 16, 18,
24, 32, 36, 48 };
+
+static struct clk_div_mult_table cpg_div = {
+ .divisors = div2,
+ .nr_divisors = ARRAY_SIZE(div2),
+};
+
struct clk_priv {
unsigned int shift;
@@ -52,82 +58,23 @@ FRQMR_CLK_DATA(ifc, 28, 0x000e);
static unsigned long frqmr_recalc(struct clk *clk)
{
struct clk_priv *data = clk->priv;
- unsigned int idx;
-
- idx = (__raw_readl(FRQMR1) >> data->shift) & 0x000f;
-
- return clk->parent->rate / div2[idx];
-}
-
-static void frqmr_build_rate_table(struct clk *clk)
-{
- struct clk_priv *data = clk->priv;
- int i, entry;
-
- for (i = entry = 0; i < ARRAY_SIZE(div2); i++) {
- if ((data->div_bitmap & (1 << i)) == 0)
- continue;
+ unsigned int idx = (__raw_readl(FRQMR1) >> data->shift) & 0x000f;
- data->freq_table[entry].index = entry;
- data->freq_table[entry].frequency =
- clk->parent->rate / div2[i];
-
- entry++;
- }
-
- if (entry == 0) {
- pr_warning("clkfwk: failed to build frequency table "
- "for \"%s\" clk!\n", clk->name);
- return;
- }
-
- /* Termination entry */
- data->freq_table[entry].index = entry;
- data->freq_table[entry].frequency = CPUFREQ_TABLE_END;
+ clk_rate_table_build(clk, data->freq_table, ARRAY_SIZE(div2),
+ &cpg_div, &data->div_bitmap);
+
+ return data->freq_table[idx].frequency;
}
static long frqmr_round_rate(struct clk *clk, unsigned long rate)
{
struct clk_priv *data = clk->priv;
- unsigned long rate_error, rate_error_prev = ~0UL;
- unsigned long rate_best_fit = rate;
- unsigned long highest, lowest;
- int i;
-
- highest = lowest = 0;
-
- for (i = 0; data->freq_table[i].frequency != CPUFREQ_TABLE_END; i++) {
- unsigned long freq = data->freq_table[i].frequency;
-
- if (freq == CPUFREQ_ENTRY_INVALID)
- continue;
-
- if (freq > highest)
- highest = freq;
- if (freq < lowest)
- lowest = freq;
-
- rate_error = abs(freq - rate);
- if (rate_error < rate_error_prev) {
- rate_best_fit = freq;
- rate_error_prev = rate_error;
- }
-
- if (rate_error == 0)
- break;
- }
-
- if (rate >= highest)
- rate_best_fit = highest;
- if (rate <= lowest)
- rate_best_fit = lowest;
- return rate_best_fit;
+ return clk_rate_table_round(clk, data->freq_table, rate);
}
static struct clk_ops frqmr_clk_ops = {
.recalc = frqmr_recalc,
- .build_rate_table = frqmr_build_rate_table,
.round_rate = frqmr_round_rate,
};
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