Commit efa85048 authored by Stephen Boyd's avatar Stephen Boyd
Browse files

clk: Inform the core about consumer devices 



We'd like to have a pointer to the device that's consuming a particular
clk in the clk framework so we can link the consumer to the clk provider
with a PM device link. Add a device argument to clk_hw_create_clk() for
this so it can be used in subsequent patches to add and remove the link.

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 4472287a

drivers/clk/clk.c

+5 −2
Original line number Diff line number Diff line
@@ -82,6 +82,7 @@ struct clk_core { 


struct clk {

	struct clk_core	*core;

	struct device *dev;

	const char *dev_id;

	const char *con_id;

	unsigned long min_rate;
@@ -3273,6 +3274,7 @@ static void free_clk(struct clk *clk) 
/**

 * clk_hw_create_clk: Allocate and link a clk consumer to a clk_core given

 * a clk_hw

 * @dev: clk consumer device

 * @hw: clk_hw associated with the clk being consumed

 * @dev_id: string describing device name

 * @con_id: connection ID string on device
@@ -3281,7 +3283,7 @@ static void free_clk(struct clk *clk) 
 * consumers. It connects a consumer to the clk_core and clk_hw structures

 * used by the framework and clk provider respectively.

 */

struct clk *clk_hw_create_clk(struct clk_hw *hw,

struct clk *clk_hw_create_clk(struct device *dev, struct clk_hw *hw,

			      const char *dev_id, const char *con_id)

{

	struct clk *clk;
@@ -3295,6 +3297,7 @@ struct clk *clk_hw_create_clk(struct clk_hw *hw, 
	clk = alloc_clk(core, dev_id, con_id);

	if (IS_ERR(clk))

		return clk;

	clk->dev = dev;



	if (!try_module_get(core->owner)) {

		free_clk(clk);
@@ -4149,7 +4152,7 @@ struct clk *of_clk_get_from_provider(struct of_phandle_args *clkspec) 
{

	struct clk_hw *hw = of_clk_get_hw_from_clkspec(clkspec);



	return clk_hw_create_clk(hw, NULL, __func__);

	return clk_hw_create_clk(NULL, hw, NULL, __func__);

}

EXPORT_SYMBOL_GPL(of_clk_get_from_provider);

drivers/clk/clk.h

+5 −2
Original line number Diff line number Diff line
@@ -5,6 +5,8 @@ 
 */



struct clk_hw;

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,
@@ -13,13 +15,14 @@ struct clk_hw *of_clk_get_hw_from_clkspec(struct of_phandle_args *clkspec); 
#endif



#ifdef CONFIG_COMMON_CLK

struct clk *clk_hw_create_clk(struct clk_hw *hw,

struct clk *clk_hw_create_clk(struct device *dev, struct clk_hw *hw,

			      const char *dev_id, const char *con_id);

void __clk_put(struct clk *clk);

#else

/* All these casts to avoid ifdefs in clkdev... */

static inline struct clk *

clk_hw_create_clk(struct clk_hw *hw, const char *dev_id, const char *con_id)

clk_hw_create_clk(struct device *dev, struct clk_hw *hw, const char *dev_id,

		  const char *con_id)

{

	return (struct clk *)hw;

}

drivers/clk/clkdev.c

+11 −5
Original line number Diff line number Diff line
@@ -51,7 +51,7 @@ static struct clk *__of_clk_get(struct device_node *np, 
{

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



	return clk_hw_create_clk(hw, dev_id, con_id);

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

}



struct clk *of_clk_get(struct device_node *np, int index)
@@ -130,7 +130,8 @@ static struct clk_lookup *clk_find(const char *dev_id, const char *con_id) 
	return cl;

}



struct clk *clk_get_sys(const char *dev_id, const char *con_id)

static struct clk *__clk_get_sys(struct device *dev, const char *dev_id,

				 const char *con_id)

{

	struct clk_lookup *cl;

	struct clk *clk = NULL;
@@ -141,7 +142,7 @@ struct clk *clk_get_sys(const char *dev_id, const char *con_id) 
	if (!cl)

		goto out;



	clk = clk_hw_create_clk(cl->clk_hw, dev_id, con_id);

	clk = clk_hw_create_clk(dev, cl->clk_hw, dev_id, con_id);

	if (IS_ERR(clk))

		cl = NULL;

out:
@@ -149,6 +150,11 @@ out: 


	return cl ? clk : ERR_PTR(-ENOENT);

}



struct clk *clk_get_sys(const char *dev_id, const char *con_id)

{

	return __clk_get_sys(NULL, dev_id, con_id);

}

EXPORT_SYMBOL(clk_get_sys);



struct clk *clk_get(struct device *dev, const char *con_id)
@@ -159,10 +165,10 @@ struct clk *clk_get(struct device *dev, const char *con_id) 
	if (dev && dev->of_node) {

		hw = of_clk_get_hw(dev->of_node, 0, con_id);

		if (!IS_ERR(hw) || PTR_ERR(hw) == -EPROBE_DEFER)

			return clk_hw_create_clk(hw, dev_id, con_id);

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

	}



	return clk_get_sys(dev_id, con_id);

	return __clk_get_sys(dev, dev_id, con_id);

}

EXPORT_SYMBOL(clk_get);

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