Commit 8feed347 authored by Matt Porter's avatar Matt Porter Committed by Felipe Balbi
Browse files

phy: add phy_get_bus_width()/phy_set_bus_width() calls 



This adds a pair of APIs that allows the generic PHY subsystem to
provide information on the PHY bus width. The PHY provider driver may
use phy_set_bus_width() to set the bus width that the PHY supports.
The controller driver may then use phy_get_bus_width() to fetch the
PHY bus width in order to properly configure the controller.

Signed-off-by: default avatarMatt Porter <mporter@linaro.org>
Acked-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent e90b8417

include/linux/phy/phy.h

+28 −0
Original line number Diff line number Diff line
@@ -37,6 +37,14 @@ struct phy_ops { 
	struct module *owner;

};



/**

 * struct phy_attrs - represents phy attributes

 * @bus_width: Data path width implemented by PHY

 */

struct phy_attrs {

	u32			bus_width;

};



/**

 * struct phy - represents the phy device

 * @dev: phy device
@@ -46,6 +54,7 @@ struct phy_ops { 
 * @mutex: mutex to protect phy_ops

 * @init_count: used to protect when the PHY is used by multiple consumers

 * @power_count: used to protect when the PHY is used by multiple consumers

 * @phy_attrs: used to specify PHY specific attributes

 */

struct phy {

	struct device		dev;
@@ -55,6 +64,7 @@ struct phy { 
	struct mutex		mutex;

	int			init_count;

	int			power_count;

	struct phy_attrs	attrs;

};



/**
@@ -127,6 +137,14 @@ int phy_init(struct phy *phy); 
int phy_exit(struct phy *phy);

int phy_power_on(struct phy *phy);

int phy_power_off(struct phy *phy);

static inline int phy_get_bus_width(struct phy *phy)

{

	return phy->attrs.bus_width;

}

static inline void phy_set_bus_width(struct phy *phy, int bus_width)

{

	phy->attrs.bus_width = bus_width;

}

struct phy *phy_get(struct device *dev, const char *string);

struct phy *devm_phy_get(struct device *dev, const char *string);

void phy_put(struct phy *phy);
@@ -199,6 +217,16 @@ static inline int phy_power_off(struct phy *phy) 
	return -ENOSYS;

}



static inline int phy_get_bus_width(struct phy *phy)

{

	return -ENOSYS;

}



static inline void phy_set_bus_width(struct phy *phy, int bus_width)

{

	return;

}



static inline struct phy *phy_get(struct device *dev, const char *string)

{

	return ERR_PTR(-ENOSYS);

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