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authorPaul Mundt <lethal@linux-sh.org>2012-05-25 14:59:26 +0900
committerPaul Mundt <lethal@linux-sh.org>2012-05-25 14:59:26 +0900
commita60977a51333a8108f0574aa26094d66b7fedf34 (patch)
treed3abf6c5ae29d91abf79d79c9fa6dad2881e5532
parent07acfc2a9349a8ce45b236c2624dad452001966b (diff)
downloadop-kernel-dev-a60977a51333a8108f0574aa26094d66b7fedf34.zip
op-kernel-dev-a60977a51333a8108f0574aa26094d66b7fedf34.tar.gz
sh: clkfwk: Move to common clk_div_table accessors for div4/div6.
This plugs in a generic clk_div_table, based on the div4 version. div6 is then adopted to use it for encapsulating its div table, which permits us to start div6/4 unification, as well as preparation for other div types. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
-rw-r--r--drivers/sh/clk/cpg.c46
-rw-r--r--include/linux/sh_clk.h5
2 files changed, 38 insertions, 13 deletions
diff --git a/drivers/sh/clk/cpg.c b/drivers/sh/clk/cpg.c
index f0d015d..9dea329 100644
--- a/drivers/sh/clk/cpg.c
+++ b/drivers/sh/clk/cpg.c
@@ -71,6 +71,22 @@ static long sh_clk_div_round_rate(struct clk *clk, unsigned long rate)
return clk_rate_table_round(clk, clk->freq_table, rate);
}
+/*
+ * Div/mult table lookup helpers
+ */
+static inline struct clk_div_table *clk_to_div_table(struct clk *clk)
+{
+ return clk->priv;
+}
+
+static inline struct clk_div_mult_table *clk_to_div_mult_table(struct clk *clk)
+{
+ return clk_to_div_table(clk)->div_mult_table;
+}
+
+/*
+ * div6 support
+ */
static int sh_clk_div6_divisors[64] = {
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32,
@@ -78,14 +94,18 @@ static int sh_clk_div6_divisors[64] = {
49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64
};
-static struct clk_div_mult_table sh_clk_div6_table = {
+static struct clk_div_mult_table div6_div_mult_table = {
.divisors = sh_clk_div6_divisors,
.nr_divisors = ARRAY_SIZE(sh_clk_div6_divisors),
};
+static struct clk_div_table sh_clk_div6_table = {
+ .div_mult_table = &div6_div_mult_table,
+};
+
static unsigned long sh_clk_div6_recalc(struct clk *clk)
{
- struct clk_div_mult_table *table = &sh_clk_div6_table;
+ struct clk_div_mult_table *table = clk_to_div_mult_table(clk);
unsigned int idx;
clk_rate_table_build(clk, clk->freq_table, table->nr_divisors,
@@ -98,7 +118,7 @@ static unsigned long sh_clk_div6_recalc(struct clk *clk)
static int sh_clk_div6_set_parent(struct clk *clk, struct clk *parent)
{
- struct clk_div_mult_table *table = &sh_clk_div6_table;
+ struct clk_div_mult_table *table = clk_to_div_mult_table(clk);
u32 value;
int ret, i;
@@ -223,7 +243,8 @@ static int __init sh_clk_div6_register_ops(struct clk *clks, int nr,
{
struct clk *clkp;
void *freq_table;
- int nr_divs = sh_clk_div6_table.nr_divisors;
+ struct clk_div_table *table = &sh_clk_div6_table;
+ int nr_divs = table->div_mult_table->nr_divisors;
int freq_table_size = sizeof(struct cpufreq_frequency_table);
int ret = 0;
int k;
@@ -239,6 +260,7 @@ static int __init sh_clk_div6_register_ops(struct clk *clks, int nr,
clkp = clks + k;
clkp->ops = ops;
+ clkp->priv = table;
clkp->freq_table = freq_table + (k * freq_table_size);
clkp->freq_table[nr_divs].frequency = CPUFREQ_TABLE_END;
ret = clk_register(clkp);
@@ -262,10 +284,12 @@ int __init sh_clk_div6_reparent_register(struct clk *clks, int nr)
&sh_clk_div6_reparent_clk_ops);
}
+/*
+ * div4 support
+ */
static unsigned long sh_clk_div4_recalc(struct clk *clk)
{
- struct clk_div4_table *d4t = clk->priv;
- struct clk_div_mult_table *table = d4t->div_mult_table;
+ struct clk_div_mult_table *table = clk_to_div_mult_table(clk);
unsigned int idx;
clk_rate_table_build(clk, clk->freq_table, table->nr_divisors,
@@ -278,8 +302,7 @@ static unsigned long sh_clk_div4_recalc(struct clk *clk)
static int sh_clk_div4_set_parent(struct clk *clk, struct clk *parent)
{
- struct clk_div4_table *d4t = clk->priv;
- struct clk_div_mult_table *table = d4t->div_mult_table;
+ struct clk_div_mult_table *table = clk_to_div_mult_table(clk);
u32 value;
int ret;
@@ -308,7 +331,7 @@ static int sh_clk_div4_set_parent(struct clk *clk, struct clk *parent)
static int sh_clk_div4_set_rate(struct clk *clk, unsigned long rate)
{
- struct clk_div4_table *d4t = clk->priv;
+ struct clk_div_table *dt = clk_to_div_table(clk);
unsigned long value;
int idx = clk_rate_table_find(clk, clk->freq_table, rate);
if (idx < 0)
@@ -319,8 +342,9 @@ static int sh_clk_div4_set_rate(struct clk *clk, unsigned long rate)
value |= (idx << clk->enable_bit);
sh_clk_write(value, clk);
- if (d4t->kick)
- d4t->kick(clk);
+ /* XXX: Should use a post-change notifier */
+ if (dt->kick)
+ dt->kick(clk);
return 0;
}
diff --git a/include/linux/sh_clk.h b/include/linux/sh_clk.h
index c513b73..706b803 100644
--- a/include/linux/sh_clk.h
+++ b/include/linux/sh_clk.h
@@ -18,7 +18,6 @@ struct clk_mapping {
struct kref ref;
};
-
struct sh_clk_ops {
#ifdef CONFIG_SH_CLK_CPG_LEGACY
void (*init)(struct clk *clk);
@@ -149,11 +148,13 @@ static inline int __deprecated sh_clk_mstp32_register(struct clk *clks, int nr)
.flags = _flags, \
}
-struct clk_div4_table {
+struct clk_div_table {
struct clk_div_mult_table *div_mult_table;
void (*kick)(struct clk *clk);
};
+#define clk_div4_table clk_div_table
+
int sh_clk_div4_register(struct clk *clks, int nr,
struct clk_div4_table *table);
int sh_clk_div4_enable_register(struct clk *clks, int nr,
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