[PATCH] dt-bindings: net: ethernet-phy: clarify when compatible must specify PHY ID

[Buday Csaba <buday.csaba@prolan.hu>]

Change PHY ID description in ethernet-phy.yaml to clarify that a
PHY ID is required (may -> must) when the PHY requires special
initialization sequence.

Link: https://lore.kernel.org/netdev/20251026212026.GA2959311-robh@kernel.org/
Link: https://lore.kernel.org/netdev/aQIZvDt5gooZSTcp@debianbuilder/

Signed-off-by: Buday Csaba <buday.csaba@prolan.hu>
---
 Documentation/devicetree/bindings/net/ethernet-phy.yaml | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/ethernet-phy.yaml b/Documentation/devicetree/bindings/net/ethernet-phy.yaml
index 2ec2d9fda..6f5599902 100644
--- a/Documentation/devicetree/bindings/net/ethernet-phy.yaml
+++ b/Documentation/devicetree/bindings/net/ethernet-phy.yaml
@@ -35,9 +35,10 @@ properties:
         description: PHYs that implement IEEE802.3 clause 45
       - pattern: "^ethernet-phy-id[a-f0-9]{4}\\.[a-f0-9]{4}$"
         description:
-          If the PHY reports an incorrect ID (or none at all) then the
-          compatible list may contain an entry with the correct PHY ID
-          in the above form.
+          If the PHY reports an incorrect ID (or none at all), or the PHY
+          requires a specific initialization sequence (like a particular
+          order of clocks, resets, power supplies), then the compatible list
+          must contain an entry with the correct PHY ID in the above form.
           The first group of digits is the 16 bit Phy Identifier 1
           register, this is the chip vendor OUI bits 3:18. The
           second group of digits is the Phy Identifier 2 register,
-- 
2.39.5