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clk: fractional-divider: Add hw based registration APIs

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Add registration APIs in the clk fractional divider 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 00:15:09 -08:00
parent 0759ac8a73
commit 39b44cff4a
2 changed files with 40 additions and 5 deletions
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40
drivers/clk/clk-fractional-divider.c
View file

@ -116,14 +116,15 @@ const struct clk_ops clk_fractional_divider_ops = {
}; };
EXPORT_SYMBOL_GPL(clk_fractional_divider_ops); EXPORT_SYMBOL_GPL(clk_fractional_divider_ops);
struct clk *clk_register_fractional_divider(struct device *dev, struct clk_hw *clk_hw_register_fractional_divider(struct device *dev,
const char *name, const char *parent_name, unsigned long flags, const char *name, const char *parent_name, unsigned long flags,
void __iomem *reg, u8 mshift, u8 mwidth, u8 nshift, u8 nwidth, void __iomem *reg, u8 mshift, u8 mwidth, u8 nshift, u8 nwidth,
u8 clk_divider_flags, spinlock_t *lock) u8 clk_divider_flags, spinlock_t *lock)
{ {
struct clk_fractional_divider *fd; struct clk_fractional_divider *fd;
struct clk_init_data init; struct clk_init_data init;
struct clk *clk; struct clk_hw *hw;
int ret;
fd = kzalloc(sizeof(*fd), GFP_KERNEL); fd = kzalloc(sizeof(*fd), GFP_KERNEL);
if (!fd) if (!fd)
@ -146,10 +147,39 @@ struct clk *clk_register_fractional_divider(struct device *dev,
fd->lock = lock; fd->lock = lock;
fd->hw.init = &init; fd->hw.init = &init;
clk = clk_register(dev, &fd->hw); hw = &fd->hw;
if (IS_ERR(clk)) ret = clk_hw_register(dev, hw);
if (ret) {
kfree(fd); kfree(fd);
hw = ERR_PTR(ret);
}
return clk; return hw;
}
EXPORT_SYMBOL_GPL(clk_hw_register_fractional_divider);
struct clk *clk_register_fractional_divider(struct device *dev,
const char *name, const char *parent_name, unsigned long flags,
void __iomem *reg, u8 mshift, u8 mwidth, u8 nshift, u8 nwidth,
u8 clk_divider_flags, spinlock_t *lock)
{
struct clk_hw *hw;
hw = clk_hw_register_fractional_divider(dev, name, parent_name, flags,
reg, mshift, mwidth, nshift, nwidth, clk_divider_flags,
lock);
if (IS_ERR(hw))
return ERR_CAST(hw);
return hw->clk;
} }
EXPORT_SYMBOL_GPL(clk_register_fractional_divider); EXPORT_SYMBOL_GPL(clk_register_fractional_divider);
void clk_hw_unregister_fractional_divider(struct clk_hw *hw)
{
struct clk_fractional_divider *fd;
fd = to_clk_fd(hw);
clk_hw_unregister(hw);
kfree(fd);
}

5
include/linux/clk-provider.h
View file

@ -563,6 +563,11 @@ struct clk *clk_register_fractional_divider(struct device *dev,
const char *name, const char *parent_name, unsigned long flags, const char *name, const char *parent_name, unsigned long flags,
void __iomem *reg, u8 mshift, u8 mwidth, u8 nshift, u8 nwidth, void __iomem *reg, u8 mshift, u8 mwidth, u8 nshift, u8 nwidth,
u8 clk_divider_flags, spinlock_t *lock); u8 clk_divider_flags, spinlock_t *lock);
struct clk_hw *clk_hw_register_fractional_divider(struct device *dev,
const char *name, const char *parent_name, unsigned long flags,
void __iomem *reg, u8 mshift, u8 mwidth, u8 nshift, u8 nwidth,
u8 clk_divider_flags, spinlock_t *lock);
void clk_hw_unregister_fractional_divider(struct clk_hw *hw);
/** /**
* struct clk_multiplier - adjustable multiplier clock * struct clk_multiplier - adjustable multiplier clock