diff options
| -rw-r--r-- | drivers/phy/phy-core.c | 36 | ||||
| -rw-r--r-- | include/linux/phy/phy.h | 8 |
2 files changed, 44 insertions, 0 deletions
diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c index 67af14f680..7c1f3d440b 100644 --- a/drivers/phy/phy-core.c +++ b/drivers/phy/phy-core.c @@ -268,6 +268,42 @@ struct phy *of_phy_get(struct device_node *np, const char *con_id) } /** + * of_phy_get_by_phandle() - lookup and obtain a reference to a phy. + * @dev: device that requests this phy + * @phandle - name of the property holding the phy phandle value + * @index - the index of the phy + * + * 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_by_phandle(struct device_d *dev, const char *phandle, + u8 index) +{ + struct device_node *np; + struct phy_provider *phy_provider; + + if (!dev->device_node) { + dev_dbg(dev, "device does not have a device node entry\n"); + return ERR_PTR(-EINVAL); + } + + np = of_parse_phandle(dev->device_node, phandle, index); + if (!np) { + dev_dbg(dev, "failed to get %s phandle in %s node\n", phandle, + dev->device_node->full_name); + return ERR_PTR(-ENODEV); + } + + phy_provider = of_phy_provider_lookup(np); + if (IS_ERR(phy_provider)) { + return ERR_PTR(-ENODEV); + } + + return phy_provider->of_xlate(phy_provider->dev, NULL); +} + +/** * phy_get() - lookup and obtain a reference to a phy. * @dev: device that requests this phy * @string: the phy name as given in the dt data or the name of the controller diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h index 94f0044036..0d78923358 100644 --- a/include/linux/phy/phy.h +++ b/include/linux/phy/phy.h @@ -136,6 +136,8 @@ static inline void phy_set_bus_width(struct phy *phy, int bus_width) } struct phy *phy_get(struct device_d *dev, const char *string); struct phy *phy_optional_get(struct device_d *dev, const char *string); +struct phy *of_phy_get_by_phandle(struct device_d *dev, const char *phandle, + u8 index); void phy_put(struct phy *phy); struct phy *of_phy_get(struct device_node *np, const char *con_id); struct phy *of_phy_simple_xlate(struct device_d *dev, @@ -198,6 +200,12 @@ static inline struct phy *phy_optional_get(struct device_d *dev, return ERR_PTR(-ENOSYS); } +static inline struct phy *of_phy_get_by_phandle(struct device_d *dev, + const char *phandle, u8 index) +{ + return ERR_PTR(-ENOSYS); +} + static inline void phy_put(struct phy *phy) { } |