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path: root/drivers/clk/clk-divider.c
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Diffstat (limited to 'drivers/clk/clk-divider.c')
-rw-r--r--drivers/clk/clk-divider.c68
1 files changed, 34 insertions, 34 deletions
diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
index d5ac6a75ea5..8ea11b44452 100644
--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -45,7 +45,6 @@ static unsigned long clk_divider_recalc_rate(struct clk_hw *hw,
return parent_rate / div;
}
-EXPORT_SYMBOL_GPL(clk_divider_recalc_rate);
/*
* The reverse of DIV_ROUND_UP: The maximum number which
@@ -68,8 +67,8 @@ static int clk_divider_bestdiv(struct clk_hw *hw, unsigned long rate,
if (divider->flags & CLK_DIVIDER_ONE_BASED)
maxdiv--;
- if (!best_parent_rate) {
- parent_rate = __clk_get_rate(__clk_get_parent(hw->clk));
+ if (!(__clk_get_flags(hw->clk) & CLK_SET_RATE_PARENT)) {
+ parent_rate = *best_parent_rate;
bestdiv = DIV_ROUND_UP(parent_rate, rate);
bestdiv = bestdiv == 0 ? 1 : bestdiv;
bestdiv = bestdiv > maxdiv ? maxdiv : bestdiv;
@@ -109,24 +108,18 @@ static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
int div;
div = clk_divider_bestdiv(hw, rate, prate);
- if (prate)
- return *prate / div;
- else {
- unsigned long r;
- r = __clk_get_rate(__clk_get_parent(hw->clk));
- return r / div;
- }
+ return *prate / div;
}
-EXPORT_SYMBOL_GPL(clk_divider_round_rate);
-static int clk_divider_set_rate(struct clk_hw *hw, unsigned long rate)
+static int clk_divider_set_rate(struct clk_hw *hw, unsigned long rate,
+ unsigned long parent_rate)
{
struct clk_divider *divider = to_clk_divider(hw);
unsigned int div;
unsigned long flags = 0;
u32 val;
- div = __clk_get_rate(__clk_get_parent(hw->clk)) / rate;
+ div = parent_rate / rate;
if (!(divider->flags & CLK_DIVIDER_ONE_BASED))
div--;
@@ -147,15 +140,26 @@ static int clk_divider_set_rate(struct clk_hw *hw, unsigned long rate)
return 0;
}
-EXPORT_SYMBOL_GPL(clk_divider_set_rate);
-struct clk_ops clk_divider_ops = {
+const struct clk_ops clk_divider_ops = {
.recalc_rate = clk_divider_recalc_rate,
.round_rate = clk_divider_round_rate,
.set_rate = clk_divider_set_rate,
};
EXPORT_SYMBOL_GPL(clk_divider_ops);
+/**
+ * clk_register_divider - register a divider clock with the clock framework
+ * @dev: device registering this clock
+ * @name: name of this clock
+ * @parent_name: name of clock's parent
+ * @flags: framework-specific flags
+ * @reg: register address to adjust divider
+ * @shift: number of bits to shift the bitfield
+ * @width: width of the bitfield
+ * @clk_divider_flags: divider-specific flags for this clock
+ * @lock: shared register lock for this clock
+ */
struct clk *clk_register_divider(struct device *dev, const char *name,
const char *parent_name, unsigned long flags,
void __iomem *reg, u8 shift, u8 width,
@@ -163,38 +167,34 @@ struct clk *clk_register_divider(struct device *dev, const char *name,
{
struct clk_divider *div;
struct clk *clk;
+ struct clk_init_data init;
+ /* allocate the divider */
div = kzalloc(sizeof(struct clk_divider), GFP_KERNEL);
-
if (!div) {
pr_err("%s: could not allocate divider clk\n", __func__);
- return NULL;
+ return ERR_PTR(-ENOMEM);
}
+ init.name = name;
+ init.ops = &clk_divider_ops;
+ init.flags = flags;
+ init.parent_names = (parent_name ? &parent_name: NULL);
+ init.num_parents = (parent_name ? 1 : 0);
+
/* struct clk_divider assignments */
div->reg = reg;
div->shift = shift;
div->width = width;
div->flags = clk_divider_flags;
div->lock = lock;
+ div->hw.init = &init;
- if (parent_name) {
- div->parent[0] = kstrdup(parent_name, GFP_KERNEL);
- if (!div->parent[0])
- goto out;
- }
-
- clk = clk_register(dev, name,
- &clk_divider_ops, &div->hw,
- div->parent,
- (parent_name ? 1 : 0),
- flags);
- if (clk)
- return clk;
+ /* register the clock */
+ clk = clk_register(dev, &div->hw);
-out:
- kfree(div->parent[0]);
- kfree(div);
+ if (IS_ERR(clk))
+ kfree(div);
- return NULL;
+ return clk;
}