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clk: composite: Add hw based registration APIs

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Add registration APIs in the clk composite code to return struct
clk_hw pointers instead of struct clk pointers. This way we hide
the struct clk pointer from providers unless they need to use
consumer facing APIs.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This commit is contained in:
Stephen Boyd 2016-02-07 00:20:31 -08:00
parent 39b44cff4a
commit 49cb392d36
2 changed files with 40 additions and 12 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

45
drivers/clk/clk-composite.c
View file

@ -184,17 +184,18 @@ static void clk_composite_disable(struct clk_hw *hw)
gate_ops->disable(gate_hw);
}
struct clk *clk_register_composite(struct device *dev, const char *name,
struct clk_hw *clk_hw_register_composite(struct device *dev, const char *name,
const char * const *parent_names, int num_parents,
struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
unsigned long flags)
{
struct clk *clk;
struct clk_hw *hw;
struct clk_init_data init;
struct clk_composite *composite;
struct clk_ops *clk_composite_ops;
int ret;
composite = kzalloc(sizeof(*composite), GFP_KERNEL);
if (!composite)
@ -204,12 +205,13 @@ struct clk *clk_register_composite(struct device *dev, const char *name,
init.flags = flags | CLK_IS_BASIC;
init.parent_names = parent_names;
init.num_parents = num_parents;
hw = &composite->hw;
clk_composite_ops = &composite->ops;
if (mux_hw && mux_ops) {
if (!mux_ops->get_parent) {
clk = ERR_PTR(-EINVAL);
hw = ERR_PTR(-EINVAL);
goto err;
}
@ -224,7 +226,7 @@ struct clk *clk_register_composite(struct device *dev, const char *name,
if (rate_hw && rate_ops) {
if (!rate_ops->recalc_rate) {
clk = ERR_PTR(-EINVAL);
hw = ERR_PTR(-EINVAL);
goto err;
}
clk_composite_ops->recalc_rate = clk_composite_recalc_rate;
@ -253,7 +255,7 @@ struct clk *clk_register_composite(struct device *dev, const char *name,
if (gate_hw && gate_ops) {
if (!gate_ops->is_enabled || !gate_ops->enable ||
!gate_ops->disable) {
clk = ERR_PTR(-EINVAL);
hw = ERR_PTR(-EINVAL);
goto err;
}
@ -267,22 +269,41 @@ struct clk *clk_register_composite(struct device *dev, const char *name,
init.ops = clk_composite_ops;
composite->hw.init = &init;
clk = clk_register(dev, &composite->hw);
if (IS_ERR(clk))
ret = clk_hw_register(dev, hw);
if (ret) {
hw = ERR_PTR(ret);
goto err;
}
if (composite->mux_hw)
composite->mux_hw->clk = clk;
composite->mux_hw->clk = hw->clk;
if (composite->rate_hw)
composite->rate_hw->clk = clk;
composite->rate_hw->clk = hw->clk;
if (composite->gate_hw)
composite->gate_hw->clk = clk;
composite->gate_hw->clk = hw->clk;
return clk;
return hw;
err:
kfree(composite);
return clk;
return hw;
}
struct clk *clk_register_composite(struct device *dev, const char *name,
const char * const *parent_names, int num_parents,
struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
unsigned long flags)
{
struct clk_hw *hw;
hw = clk_hw_register_composite(dev, name, parent_names, num_parents,
mux_hw, mux_ops, rate_hw, rate_ops, gate_hw, gate_ops,
flags);
if (IS_ERR(hw))
return ERR_CAST(hw);
return hw->clk;
}

7
include/linux/clk-provider.h
View file

@ -638,6 +638,13 @@ struct clk *clk_register_composite(struct device *dev, const char *name,
struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
unsigned long flags);
struct clk_hw *clk_hw_register_composite(struct device *dev, const char *name,
const char * const *parent_names, int num_parents,
struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
unsigned long flags);
void clk_hw_unregister_composite(struct clk_hw *hw);
/***
* struct clk_gpio_gate - gpio gated clock