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clk: gpio: Add hw based registration APIs

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Add registration APIs in the clk gpio 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 00:27:55 -08:00
parent 49cb392d36
commit b120743a64
2 changed files with 49 additions and 11 deletions
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52
drivers/clk/clk-gpio.c
View File

@ -94,13 +94,13 @@ const struct clk_ops clk_gpio_mux_ops = {
};
EXPORT_SYMBOL_GPL(clk_gpio_mux_ops);
static struct clk *clk_register_gpio(struct device *dev, const char *name,
static struct clk_hw *clk_register_gpio(struct device *dev, const char *name,
const char * const *parent_names, u8 num_parents, unsigned gpio,
bool active_low, unsigned long flags,
const struct clk_ops *clk_gpio_ops)
{
struct clk_gpio *clk_gpio;
struct clk *clk;
struct clk_hw *hw;
struct clk_init_data init = {};
unsigned long gpio_flags;
int err;
@ -141,24 +141,26 @@ static struct clk *clk_register_gpio(struct device *dev, const char *name,
clk_gpio->gpiod = gpio_to_desc(gpio);
clk_gpio->hw.init = &init;
hw = &clk_gpio->hw;
if (dev)
clk = devm_clk_register(dev, &clk_gpio->hw);
err = devm_clk_hw_register(dev, hw);
else
clk = clk_register(NULL, &clk_gpio->hw);
err = clk_hw_register(NULL, hw);
if (!IS_ERR(clk))
return clk;
if (!err)
return hw;
if (!dev) {
gpiod_put(clk_gpio->gpiod);
kfree(clk_gpio);
}
return clk;
return ERR_PTR(err);
}
/**
* clk_register_gpio_gate - register a gpio clock gate with the clock framework
* clk_hw_register_gpio_gate - register a gpio clock gate with the clock
* framework
* @dev: device that is registering this clock
* @name: name of this clock
* @parent_name: name of this clock's parent
@ -166,7 +168,7 @@ static struct clk *clk_register_gpio(struct device *dev, const char *name,
* @active_low: true if gpio should be set to 0 to enable clock
* @flags: clock flags
*/
struct clk *clk_register_gpio_gate(struct device *dev, const char *name,
struct clk_hw *clk_hw_register_gpio_gate(struct device *dev, const char *name,
const char *parent_name, unsigned gpio, bool active_low,
unsigned long flags)
{
@ -175,10 +177,24 @@ struct clk *clk_register_gpio_gate(struct device *dev, const char *name,
(parent_name ? 1 : 0), gpio, active_low, flags,
&clk_gpio_gate_ops);
}
EXPORT_SYMBOL_GPL(clk_hw_register_gpio_gate);
struct clk *clk_register_gpio_gate(struct device *dev, const char *name,
const char *parent_name, unsigned gpio, bool active_low,
unsigned long flags)
{
struct clk_hw *hw;
hw = clk_hw_register_gpio_gate(dev, name, parent_name, gpio, active_low,
flags);
if (IS_ERR(hw))
return ERR_CAST(hw);
return hw->clk;
}
EXPORT_SYMBOL_GPL(clk_register_gpio_gate);
/**
* clk_register_gpio_mux - register a gpio clock mux with the clock framework
* clk_hw_register_gpio_mux - register a gpio clock mux with the clock framework
* @dev: device that is registering this clock
* @name: name of this clock
* @parent_names: names of this clock's parents
@ -187,7 +203,7 @@ EXPORT_SYMBOL_GPL(clk_register_gpio_gate);
* @active_low: true if gpio should be set to 0 to enable clock
* @flags: clock flags
*/
struct clk *clk_register_gpio_mux(struct device *dev, const char *name,
struct clk_hw *clk_hw_register_gpio_mux(struct device *dev, const char *name,
const char * const *parent_names, u8 num_parents, unsigned gpio,
bool active_low, unsigned long flags)
{
@ -199,6 +215,20 @@ struct clk *clk_register_gpio_mux(struct device *dev, const char *name,
return clk_register_gpio(dev, name, parent_names, num_parents,
gpio, active_low, flags, &clk_gpio_mux_ops);
}
EXPORT_SYMBOL_GPL(clk_hw_register_gpio_mux);
struct clk *clk_register_gpio_mux(struct device *dev, const char *name,
const char * const *parent_names, u8 num_parents, unsigned gpio,
bool active_low, unsigned long flags)
{
struct clk_hw *hw;
hw = clk_hw_register_gpio_mux(dev, name, parent_names, num_parents,
gpio, active_low, flags);
if (IS_ERR(hw))
return ERR_CAST(hw);
return hw->clk;
}
EXPORT_SYMBOL_GPL(clk_register_gpio_mux);
static int gpio_clk_driver_probe(struct platform_device *pdev)

8
include/linux/clk-provider.h
View File

@ -667,6 +667,10 @@ extern const struct clk_ops clk_gpio_gate_ops;
struct clk *clk_register_gpio_gate(struct device *dev, const char *name,
const char *parent_name, unsigned gpio, bool active_low,
unsigned long flags);
struct clk_hw *clk_hw_register_gpio_gate(struct device *dev, const char *name,
const char *parent_name, unsigned gpio, bool active_low,
unsigned long flags);
void clk_hw_unregister_gpio_gate(struct clk_hw *hw);
/**
* struct clk_gpio_mux - gpio controlled clock multiplexer
@ -682,6 +686,10 @@ extern const struct clk_ops clk_gpio_mux_ops;
struct clk *clk_register_gpio_mux(struct device *dev, const char *name,
const char * const *parent_names, u8 num_parents, unsigned gpio,
bool active_low, unsigned long flags);
struct clk_hw *clk_hw_register_gpio_mux(struct device *dev, const char *name,
const char * const *parent_names, u8 num_parents, unsigned gpio,
bool active_low, unsigned long flags);
void clk_hw_unregister_gpio_mux(struct clk_hw *hw);
/**
* clk_register - allocate a new clock, register it and return an opaque cookie