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clk: mux: Add hw based registration APIs 

Add registration APIs in the clk mux 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 00:05:48 -08:00
parent e270d8cb13
commit 264b317197
2 changed files with 62 additions and 6 deletions
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57
drivers/clk/clk-mux.c
View File

@ -113,16 +113,17 @@ const struct clk_ops clk_mux_ro_ops = {
};
EXPORT_SYMBOL_GPL(clk_mux_ro_ops);
struct clk *clk_register_mux_table(struct device *dev, const char *name,
struct clk_hw *clk_hw_register_mux_table(struct device *dev, const char *name,
const char * const *parent_names, u8 num_parents,
unsigned long flags,
void __iomem *reg, u8 shift, u32 mask,
u8 clk_mux_flags, u32 *table, spinlock_t *lock)
{
struct clk_mux *mux;
struct clk *clk;
struct clk_hw *hw;
struct clk_init_data init;
u8 width = 0;
int ret;
if (clk_mux_flags & CLK_MUX_HIWORD_MASK) {
width = fls(mask) - ffs(mask) + 1;
@ -157,12 +158,31 @@ struct clk *clk_register_mux_table(struct device *dev, const char *name,
mux->table = table;
mux->hw.init = &init;
clk = clk_register(dev, &mux->hw);
if (IS_ERR(clk))
hw = &mux->hw;
ret = clk_hw_register(dev, hw);
if (ret) {
kfree(mux);
hw = ERR_PTR(ret);
}
return clk;
return hw;
}
EXPORT_SYMBOL_GPL(clk_hw_register_mux_table);
struct clk *clk_register_mux_table(struct device *dev, const char *name,
const char * const *parent_names, u8 num_parents,
unsigned long flags,
void __iomem *reg, u8 shift, u32 mask,
u8 clk_mux_flags, u32 *table, spinlock_t *lock)
{
struct clk_hw *hw;
hw = clk_hw_register_mux_table(dev, name, parent_names, num_parents,
flags, reg, shift, mask, clk_mux_flags,
table, lock);
if (IS_ERR(hw))
return ERR_CAST(hw);
return hw->clk;
}
EXPORT_SYMBOL_GPL(clk_register_mux_table);
@ -180,6 +200,20 @@ struct clk *clk_register_mux(struct device *dev, const char *name,
}
EXPORT_SYMBOL_GPL(clk_register_mux);
struct clk_hw *clk_hw_register_mux(struct device *dev, const char *name,
const char * const *parent_names, u8 num_parents,
unsigned long flags,
void __iomem *reg, u8 shift, u8 width,
u8 clk_mux_flags, spinlock_t *lock)
{
u32 mask = BIT(width) - 1;
return clk_hw_register_mux_table(dev, name, parent_names, num_parents,
flags, reg, shift, mask, clk_mux_flags,
NULL, lock);
}
EXPORT_SYMBOL_GPL(clk_hw_register_mux);
void clk_unregister_mux(struct clk *clk)
{
struct clk_mux *mux;
@ -195,3 +229,14 @@ void clk_unregister_mux(struct clk *clk)
kfree(mux);
}
EXPORT_SYMBOL_GPL(clk_unregister_mux);
void clk_hw_unregister_mux(struct clk_hw *hw)
{
struct clk_mux *mux;
mux = to_clk_mux(hw);
clk_hw_unregister(hw);
kfree(mux);
}
EXPORT_SYMBOL_GPL(clk_hw_unregister_mux);

11
include/linux/clk-provider.h
View File

@ -478,14 +478,25 @@ struct clk *clk_register_mux(struct device *dev, const char *name,
unsigned long flags,
void __iomem *reg, u8 shift, u8 width,
u8 clk_mux_flags, spinlock_t *lock);
struct clk_hw *clk_hw_register_mux(struct device *dev, const char *name,
const char * const *parent_names, u8 num_parents,
unsigned long flags,
void __iomem *reg, u8 shift, u8 width,
u8 clk_mux_flags, spinlock_t *lock);
struct clk *clk_register_mux_table(struct device *dev, const char *name,
const char * const *parent_names, u8 num_parents,
unsigned long flags,
void __iomem *reg, u8 shift, u32 mask,
u8 clk_mux_flags, u32 *table, spinlock_t *lock);
struct clk_hw *clk_hw_register_mux_table(struct device *dev, const char *name,
const char * const *parent_names, u8 num_parents,
unsigned long flags,
void __iomem *reg, u8 shift, u32 mask,
u8 clk_mux_flags, u32 *table, spinlock_t *lock);
void clk_unregister_mux(struct clk *clk);
void clk_hw_unregister_mux(struct clk_hw *hw);
void of_fixed_factor_clk_setup(struct device_node *node);