Introduce a wrapper over xpcs_create_fwnode() that doesn't return the
specific dw_xpcs pointer type, but the generic phylink_pcs pointer type.
For example, the NXP SJA1105 driver might use this if it has a
pcs-handle - it is already a user of xpcs_create_pcs_mdiodev().

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 drivers/net/pcs/pcs-xpcs.c   | 12 ++++++++++++
 include/linux/pcs/pcs-xpcs.h |  1 +
 2 files changed, 13 insertions(+)

diff --git a/drivers/net/pcs/pcs-xpcs.c b/drivers/net/pcs/pcs-xpcs.c
index 3d1bd5aac093..8f7c43a066c8 100644
--- a/drivers/net/pcs/pcs-xpcs.c
+++ b/drivers/net/pcs/pcs-xpcs.c
@@ -1591,6 +1591,18 @@ struct dw_xpcs *xpcs_create_fwnode(struct fwnode_handle *fwnode)
 }
 EXPORT_SYMBOL_GPL(xpcs_create_fwnode);
 
+struct phylink_pcs *xpcs_create_pcs_fwnode(struct fwnode_handle *fwnode)
+{
+	struct dw_xpcs *xpcs;
+
+	xpcs = xpcs_create_fwnode(fwnode);
+	if (IS_ERR(xpcs))
+		return ERR_CAST(xpcs);
+
+	return &xpcs->pcs;
+}
+EXPORT_SYMBOL_GPL(xpcs_create_pcs_fwnode);
+
 void xpcs_destroy(struct dw_xpcs *xpcs)
 {
 	if (!xpcs)
diff --git a/include/linux/pcs/pcs-xpcs.h b/include/linux/pcs/pcs-xpcs.h
index e40f554ff717..1fcbcd419ede 100644
--- a/include/linux/pcs/pcs-xpcs.h
+++ b/include/linux/pcs/pcs-xpcs.h
@@ -56,6 +56,7 @@ struct dw_xpcs *xpcs_create_fwnode(struct fwnode_handle *fwnode);
 void xpcs_destroy(struct dw_xpcs *xpcs);
 
 struct phylink_pcs *xpcs_create_pcs_mdiodev(struct mii_bus *bus, int addr);
+struct phylink_pcs *xpcs_create_pcs_fwnode(struct fwnode_handle *fwnode);
 void xpcs_destroy_pcs(struct phylink_pcs *pcs);
 
 #endif /* __LINUX_PCS_XPCS_H */
-- 
2.34.1