Commit cf13f289 authored by Stephen Boyd's avatar Stephen Boyd
Browse files

clk: Move of_clk_*() APIs into clk.c from clkdev.c 



The API between clk.c and clkdev.c is purely getting the clk_hw
structure (or the struct clk if it's not CCF) and then turning that
struct clk_hw pointer into a struct clk pointer via clk_hw_create_clk().
There's no need to complicate clkdev.c with these DT parsing details
that are only relevant to the common clk framework. Move the DT parsing
logic into the core framework and just expose the APIs to get a clk_hw
pointer and convert it.

Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Jeffrey Hugo <jhugo@codeaurora.org>
Cc: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: default avatarStephen Boyd <sboyd@kernel.org>
parent efa85048

drivers/clk/clk.c

+54 −3
Original line number Diff line number Diff line
@@ -4068,8 +4068,8 @@ void devm_of_clk_del_provider(struct device *dev) 
}

EXPORT_SYMBOL(devm_of_clk_del_provider);



int of_parse_clkspec(const struct device_node *np, int index, const char *name,

		     struct of_phandle_args *out_args)

static int of_parse_clkspec(const struct device_node *np, int index,

			    const char *name, struct of_phandle_args *out_args)

{

	int ret = -ENOENT;
@@ -4119,7 +4119,8 @@ __of_clk_get_hw_from_provider(struct of_clk_provider *provider, 
	return __clk_get_hw(clk);

}



struct clk_hw *of_clk_get_hw_from_clkspec(struct of_phandle_args *clkspec)

static struct clk_hw *

of_clk_get_hw_from_clkspec(struct of_phandle_args *clkspec)

{

	struct of_clk_provider *provider;

	struct clk_hw *hw = ERR_PTR(-EPROBE_DEFER);
@@ -4156,6 +4157,56 @@ struct clk *of_clk_get_from_provider(struct of_phandle_args *clkspec) 
}

EXPORT_SYMBOL_GPL(of_clk_get_from_provider);



struct clk_hw *of_clk_get_hw(struct device_node *np, int index,

			     const char *con_id)

{

	int ret;

	struct clk_hw *hw;

	struct of_phandle_args clkspec;



	ret = of_parse_clkspec(np, index, con_id, &clkspec);

	if (ret)

		return ERR_PTR(ret);



	hw = of_clk_get_hw_from_clkspec(&clkspec);

	of_node_put(clkspec.np);



	return hw;

}



static struct clk *__of_clk_get(struct device_node *np,

				int index, const char *dev_id,

				const char *con_id)

{

	struct clk_hw *hw = of_clk_get_hw(np, index, con_id);



	return clk_hw_create_clk(NULL, hw, dev_id, con_id);

}



struct clk *of_clk_get(struct device_node *np, int index)

{

	return __of_clk_get(np, index, np->full_name, NULL);

}

EXPORT_SYMBOL(of_clk_get);



/**

 * of_clk_get_by_name() - Parse and lookup a clock referenced by a device node

 * @np: pointer to clock consumer node

 * @name: name of consumer's clock input, or NULL for the first clock reference

 *

 * This function parses the clocks and clock-names properties,

 * and uses them to look up the struct clk from the registered list of clock

 * providers.

 */

struct clk *of_clk_get_by_name(struct device_node *np, const char *name)

{

	if (!np)

		return ERR_PTR(-ENOENT);



	return __of_clk_get(np, -1, np->full_name, name);

}

EXPORT_SYMBOL(of_clk_get_by_name);



/**

 * of_clk_get_parent_count() - Count the number of clocks a device node has

 * @np: device node to count

drivers/clk/clk.h

+8 −3
Original line number Diff line number Diff line
@@ -9,9 +9,14 @@ struct device; 
struct of_phandle_args;



#if defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK)

int of_parse_clkspec(const struct device_node *np, int index, const char *name,

		     struct of_phandle_args *out_args);

struct clk_hw *of_clk_get_hw_from_clkspec(struct of_phandle_args *clkspec);

struct clk_hw *of_clk_get_hw(struct device_node *np,

				    int index, const char *con_id);

#else /* !CONFIG_COMMON_CLK || !CONFIG_OF */

static inline struct clk_hw *of_clk_get_hw(struct device_node *np,

				    int index, const char *con_id)

{

	return ERR_PTR(-ENOENT);

}

#endif



#ifdef CONFIG_COMMON_CLK

drivers/clk/clkdev.c

+0 −60
Original line number Diff line number Diff line
@@ -27,66 +27,6 @@ 
static LIST_HEAD(clocks);

static DEFINE_MUTEX(clocks_mutex);



#if defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK)

static struct clk_hw *of_clk_get_hw(struct device_node *np,

				    int index, const char *con_id)

{

	int ret;

	struct clk_hw *hw;

	struct of_phandle_args clkspec;



	ret = of_parse_clkspec(np, index, con_id, &clkspec);

	if (ret)

		return ERR_PTR(ret);



	hw = of_clk_get_hw_from_clkspec(&clkspec);

	of_node_put(clkspec.np);



	return hw;

}



static struct clk *__of_clk_get(struct device_node *np,

				int index, const char *dev_id,

				const char *con_id)

{

	struct clk_hw *hw = of_clk_get_hw(np, index, con_id);



	return clk_hw_create_clk(NULL, hw, dev_id, con_id);

}



struct clk *of_clk_get(struct device_node *np, int index)

{

	return __of_clk_get(np, index, np->full_name, NULL);

}

EXPORT_SYMBOL(of_clk_get);



/**

 * of_clk_get_by_name() - Parse and lookup a clock referenced by a device node

 * @np: pointer to clock consumer node

 * @name: name of consumer's clock input, or NULL for the first clock reference

 *

 * This function parses the clocks and clock-names properties,

 * and uses them to look up the struct clk from the registered list of clock

 * providers.

 */

struct clk *of_clk_get_by_name(struct device_node *np, const char *name)

{

	if (!np)

		return ERR_PTR(-ENOENT);



	return __of_clk_get(np, -1, np->full_name, name);

}

EXPORT_SYMBOL(of_clk_get_by_name);



#else /* defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK) */



static struct clk_hw *of_clk_get_hw(struct device_node *np,

				    int index, const char *con_id)

{

	return ERR_PTR(-ENOENT);

}

#endif



/*

 * Find the correct struct clk for the device and connection ID.

 * We do slightly fuzzy matching here:

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