[PATCH 1/2] phylib: support reading the status of a fixed PHY

[Tobias Waldekranz <tobias@waldekranz.com>]

This makes it possible to check if a PHY is fixed or physical.

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
---
 drivers/net/phy/fixed_phy.c | 17 +++++++++++++++++
 include/linux/phy_fixed.h   |  9 +++++++++
 2 files changed, 26 insertions(+)

diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c
index a08a3c7..5575345 100644
--- a/drivers/net/phy/fixed_phy.c
+++ b/drivers/net/phy/fixed_phy.c
@@ -156,6 +156,23 @@ static int fixed_mdio_write(struct mii_bus *bus, int phy_addr, int reg_num,
 	return 0;
 }
 
+const struct fixed_phy_status *fixed_phy_get_status(struct phy_device *phydev)
+{
+	struct fixed_mdio_bus *fmb = &platform_fmb;
+	struct fixed_phy *fp;
+
+	if (!phydev || !phydev->bus || phydev->bus->priv != fmb)
+		return NULL;
+
+	list_for_each_entry(fp, &fmb->phys, node) {
+		if (fp->addr == phydev->addr)
+			return &fp->status;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL(fixed_phy_get_status);
+
 /*
  * If something weird is required to be done with link/speed,
  * network driver is able to assign a function to implement this.
diff --git a/include/linux/phy_fixed.h b/include/linux/phy_fixed.h
index 7e75bfe..e783b8d 100644
--- a/include/linux/phy_fixed.h
+++ b/include/linux/phy_fixed.h
@@ -12,6 +12,9 @@ struct fixed_phy_status {
 struct device_node;
 
 #if IS_ENABLED(CONFIG_FIXED_PHY)
+extern const struct fixed_phy_status *fixed_phy_get_status(
+	struct phy_device *phydev);
+
 extern int fixed_phy_add(unsigned int irq, int phy_id,
 			 struct fixed_phy_status *status);
 extern struct phy_device *fixed_phy_register(unsigned int irq,
@@ -22,6 +25,12 @@ extern int fixed_phy_set_link_update(struct phy_device *phydev,
 			int (*link_update)(struct net_device *,
 					   struct fixed_phy_status *));
 #else
+static inline const struct fixed_phy_status *fixed_phy_get_status(
+	struct phy_device *phydev)
+{
+	return NULL;
+};
+
 static inline int fixed_phy_add(unsigned int irq, int phy_id,
 				struct fixed_phy_status *status)
 {
-- 
1.8.4.357.g8d83871.dirty