Commit 0b3f3b2c authored by Kamil Debski's avatar Kamil Debski Committed by Kishon Vijay Abraham I
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phy: core: Add an exported of_phy_get function 



Previously the of_phy_get function took a struct device * and
was declared static. It was impossible to call it from
another driver and thus it was impossible to get phy defined
for a given node. The old function was renamed to _of_phy_get
and was left for internal use. of_phy_get function was added
and it was exported. The function enables to get a phy for
a given device tree node.

Signed-off-by: default avatarKamil Debski <k.debski@samsung.com>
Reviewed-by: default avatarTomasz Figa <t.figa@samsung.com>
Signed-off-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
parent 6284be23

drivers/phy/phy-core.c

+36 −9
Original line number Diff line number Diff line
@@ -274,8 +274,8 @@ int phy_power_off(struct phy *phy) 
EXPORT_SYMBOL_GPL(phy_power_off);



/**

 * of_phy_get() - lookup and obtain a reference to a phy by phandle

 * @dev: device that requests this phy

 * _of_phy_get() - lookup and obtain a reference to a phy by phandle

 * @np: device_node for which to get the phy

 * @index: the index of the phy

 *

 * Returns the phy associated with the given phandle value,
@@ -284,20 +284,17 @@ EXPORT_SYMBOL_GPL(phy_power_off); 
 * not yet loaded. This function uses of_xlate call back function provided

 * while registering the phy_provider to find the phy instance.

 */

static struct phy *of_phy_get(struct device *dev, int index)

static struct phy *_of_phy_get(struct device_node *np, int index)

{

	int ret;

	struct phy_provider *phy_provider;

	struct phy *phy = NULL;

	struct of_phandle_args args;



	ret = of_parse_phandle_with_args(dev->of_node, "phys", "#phy-cells",

	ret = of_parse_phandle_with_args(np, "phys", "#phy-cells",

		index, &args);

	if (ret) {

		dev_dbg(dev, "failed to get phy in %s node\n",

			dev->of_node->full_name);

	if (ret)

		return ERR_PTR(-ENODEV);

	}



	mutex_lock(&phy_provider_mutex);

	phy_provider = of_phy_provider_lookup(args.np);
@@ -316,6 +313,36 @@ err0: 
	return phy;

}



/**

 * of_phy_get() - lookup and obtain a reference to a phy using a device_node.

 * @np: device_node for which to get the phy

 * @con_id: name of the phy from device's point of view

 *

 * Returns the phy driver, after getting a refcount to it; or

 * -ENODEV if there is no such phy. The caller is responsible for

 * calling phy_put() to release that count.

 */

struct phy *of_phy_get(struct device_node *np, const char *con_id)

{

	struct phy *phy = NULL;

	int index = 0;



	if (con_id)

		index = of_property_match_string(np, "phy-names", con_id);



	phy = _of_phy_get(np, index);

	if (IS_ERR(phy))

		return phy;



	if (!try_module_get(phy->ops->owner))

		return ERR_PTR(-EPROBE_DEFER);



	get_device(&phy->dev);



	return phy;

}

EXPORT_SYMBOL_GPL(of_phy_get);



/**

 * phy_put() - release the PHY

 * @phy: the phy returned by phy_get()
@@ -407,7 +434,7 @@ struct phy *phy_get(struct device *dev, const char *string) 
	if (dev->of_node) {

		index = of_property_match_string(dev->of_node, "phy-names",

			string);

		phy = of_phy_get(dev, index);

		phy = _of_phy_get(dev->of_node, index);

	} else {

		phy = phy_lookup(dev, string);

	}

include/linux/phy/phy.h

+6 −0
Original line number Diff line number Diff line
@@ -151,6 +151,7 @@ struct phy *devm_phy_get(struct device *dev, const char *string); 
struct phy *devm_phy_optional_get(struct device *dev, const char *string);

void phy_put(struct phy *phy);

void devm_phy_put(struct device *dev, struct phy *phy);

struct phy *of_phy_get(struct device_node *np, const char *con_id);

struct phy *of_phy_simple_xlate(struct device *dev,

	struct of_phandle_args *args);

struct phy *phy_create(struct device *dev, const struct phy_ops *ops,
@@ -259,6 +260,11 @@ static inline void devm_phy_put(struct device *dev, struct phy *phy) 
{

}



static inline struct phy *of_phy_get(struct device_node *np, const char *con_id)

{

	return ERR_PTR(-ENOSYS);

}



static inline struct phy *of_phy_simple_xlate(struct device *dev,

	struct of_phandle_args *args)

{

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