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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: Matt Porter <mporter@linaro.org>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Matt Porter 2013-12-19 09:23:02 -05:00 committed by Felipe Balbi
parent e90b8417af
commit 8feed347d3
1 changed files with 28 additions and 0 deletions
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28
include/linux/phy/phy.h
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@ -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);