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 <mpor...@linaro.org>
---
include/linux/phy/phy.h | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index 6d72269..a0dcf2d 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -38,6 +38,14 @@ struct phy_ops {
};
/**
+ * 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
* @id: id of the 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 u32 phy_get_bus_width(struct phy *phy)
+{
+ return phy->attrs.bus_width;
+}
+static inline void phy_set_bus_width(struct phy *phy, u32 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 u32 phy_get_bus_width(struct phy *phy)
+{
+ return -ENOSYS;
+}
+
+static inline void phy_set_bus_width(struct phy *phy, u32 bus_width)
+{
+ return;
+}
+
static inline struct phy *phy_get(struct device *dev, const char *string)
{
return ERR_PTR(-ENOSYS);
--
1.8.4
--
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