[PATCH v3 4/5] phy: core: Add managed phy bulk data helper functions

[Inochi Amaoto <inochiama@gmail.com>]

Add device managed variants of the phy bulk helper functions. So
the driver can benefit from automatically managed phy handles.

Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
---
 drivers/phy/phy-core.c  | 73 +++++++++++++++++++++++++++++++++++++++++
 include/linux/phy/phy.h | 19 +++++++++++
 2 files changed, 92 insertions(+)

diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
index 5b76c006575b..a588fba33313 100644
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -1145,6 +1145,79 @@ static void phy_bulk_put_all(struct device *dev, unsigned int num_phys,
 	kfree(phys);
 }
 
+struct phy_bulk_devres {
+	struct phy_bulk_data *phys;
+	unsigned int num_phys;
+};
+
+static void devm_phy_bulk_release_all(struct device *dev, void *res)
+{
+	struct phy_bulk_devres *devres = res;
+
+	phy_bulk_put_all(dev, devres->num_phys, devres->phys);
+}
+
+/**
+ * devm_phy_bulk_get_all() - managed lookup of all PHYs requested by a device
+ * @dev: device that requests the PHYs
+ * @phys: pointer to store the allocated array of struct phy_bulk_data
+ *
+ * The function calls devm_of_phy_bulk_get_all() directly, but sets the
+ * @np parameter to dev_of_node(dev).
+ *
+ * Return: the number of PHYs on success, %0 if no PHYs are found, or a
+ * negative error code otherwise
+ */
+int devm_phy_bulk_get_all(struct device *dev, struct phy_bulk_data **phys)
+{
+	return devm_of_phy_bulk_get_all(dev, dev_of_node(dev), phys);
+}
+EXPORT_SYMBOL_GPL(devm_phy_bulk_get_all);
+
+/**
+ * devm_of_phy_bulk_get_all() - managed lookup of all PHYs from a device node
+ * @dev: device that requests the PHYs
+ * @np: device node containing the PHY references
+ * @phys: pointer to store the allocated array of struct phy_bulk_data
+ *
+ * Gets all PHYs from the specified device node, associates the allocated array
+ * and PHY references with @dev, and creates a device link for each PHY. They
+ * are automatically released on driver detach.
+ *
+ * Return: the number of PHYs on success, %0 if no PHYs are found, or a
+ * negative error code otherwise
+ */
+int devm_of_phy_bulk_get_all(struct device *dev, struct device_node *np,
+			     struct phy_bulk_data **phys)
+{
+	struct phy_bulk_devres *devres;
+	int ret;
+
+	*phys = NULL;
+
+	if (!np)
+		return 0;
+
+	devres = devres_alloc(devm_phy_bulk_release_all, sizeof(*devres),
+			      GFP_KERNEL);
+	if (!devres)
+		return -ENOMEM;
+
+	ret = of_phy_bulk_get_all(np, &devres->phys);
+	if (ret > 0) {
+		for (int i = 0; i < ret; i++)
+			phy_add_device_link(dev, devres->phys[i].phy);
+		*phys = devres->phys;
+		devres->num_phys = ret;
+		devres_add(dev, devres);
+	} else {
+		devres_free(devres);
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(devm_of_phy_bulk_get_all);
+
 /**
  * phy_bulk_init() - initialize multiple PHYs
  * @num_phys: number of entries in the phys array
diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index 77d9d74682b7..e60e42eb7e0b 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -322,6 +322,9 @@ void devm_of_phy_provider_unregister(struct device *dev,
 int phy_create_lookup(struct phy *phy, const char *con_id, const char *dev_id);
 void phy_remove_lookup(struct phy *phy, const char *con_id, const char *dev_id);
 
+int devm_phy_bulk_get_all(struct device *dev, struct phy_bulk_data **phys);
+int devm_of_phy_bulk_get_all(struct device *dev, struct device_node *np,
+			     struct phy_bulk_data **phys);
 int phy_bulk_init(unsigned int num_phys, struct phy_bulk_data *phys);
 int phy_bulk_exit(unsigned int num_phys, struct phy_bulk_data *phys);
 int phy_bulk_power_on(unsigned int num_phys, struct phy_bulk_data *phys);
@@ -511,6 +514,22 @@ static inline struct phy *devm_of_phy_get_by_index(struct device *dev,
 	return ERR_PTR(-ENOSYS);
 }
 
+static inline int devm_of_phy_bulk_get_all(struct device *dev,
+					   struct device_node *np,
+					   struct phy_bulk_data **phys)
+{
+	if (phys)
+		*phys = NULL;
+
+	return 0;
+}
+
+static inline int devm_phy_bulk_get_all(struct device *dev,
+					struct phy_bulk_data **phys)
+{
+	return devm_of_phy_bulk_get_all(dev, dev_of_node(dev), phys);
+}
+
 static inline int phy_bulk_check_disabled(unsigned int num_phys,
 					  struct phy_bulk_data *phys)
 {
-- 
2.55.0