linux-kernel - [PATCH net] dt-bindings: net: tja11xx: fix the broken binding

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Message-Id: <20240902063352.400251-1-wei.fang@nxp.com>
Date: Mon,  2 Sep 2024 14:33:52 +0800
From: Wei Fang <wei.fang@....com>
To: davem@...emloft.net,
	pabeni@...hat.com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	andrew@...n.ch,
	f.fainelli@...il.com,
	hkallweit1@...il.com
Cc: netdev@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	imx@...ts.linux.dev
Subject: [PATCH net] dt-bindings: net: tja11xx: fix the broken binding

As Rob pointed in another mail thread [1], the binding of tja11xx PHY
is completely broken, the schema cannot catch the error in the DTS. A
compatiable string must be needed if we want to add a custom propety.
So extract known PHY IDs from the tja11xx PHY drivers and convert them
into supported compatible string list to fix the broken binding issue.

[1]: https://lore.kernel.org/netdev/31058f49-bac5-49a9-a422-c43b121bf049@kernel.org/T/

Fixes: 52b2fe4535ad ("dt-bindings: net: tja11xx: add nxp,refclk_in property")
Signed-off-by: Wei Fang <wei.fang@....com>
---
 .../devicetree/bindings/net/nxp,tja11xx.yaml  | 50 +++++++++++++------
 1 file changed, 34 insertions(+), 16 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/nxp,tja11xx.yaml b/Documentation/devicetree/bindings/net/nxp,tja11xx.yaml
index 85bfa45f5122..c2a1835863e1 100644
--- a/Documentation/devicetree/bindings/net/nxp,tja11xx.yaml
+++ b/Documentation/devicetree/bindings/net/nxp,tja11xx.yaml
@@ -14,8 +14,41 @@ maintainers:
 description:
   Bindings for NXP TJA11xx automotive PHYs
 
+properties:
+  compatible:
+    enum:
+      - ethernet-phy-id0180.dc40
+      - ethernet-phy-id0180.dd00
+      - ethernet-phy-id0180.dc80
+      - ethernet-phy-id001b.b010
+      - ethernet-phy-id001b.b031
+
 allOf:
   - $ref: ethernet-phy.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - ethernet-phy-id0180.dc40
+              - ethernet-phy-id0180.dd00
+    then:
+      properties:
+        nxp,rmii-refclk-in:
+          type: boolean
+          description: |
+            The REF_CLK is provided for both transmitted and received data
+            in RMII mode. This clock signal is provided by the PHY and is
+            typically derived from an external 25MHz crystal. Alternatively,
+            a 50MHz clock signal generated by an external oscillator can be
+            connected to pin REF_CLK. A third option is to connect a 25MHz
+            clock to pin CLK_IN_OUT. So, the REF_CLK should be configured
+            as input or output according to the actual circuit connection.
+            If present, indicates that the REF_CLK will be configured as
+            interface reference clock input when RMII mode enabled.
+            If not present, the REF_CLK will be configured as interface
+            reference clock output when RMII mode enabled.
+            Only supported on TJA1100 and TJA1101.
 
 patternProperties:
   "^ethernet-phy@[0-9a-f]+$":
@@ -32,22 +65,6 @@ patternProperties:
         description:
           The ID number for the child PHY. Should be +1 of parent PHY.
 
-      nxp,rmii-refclk-in:
-        type: boolean
-        description: |
-          The REF_CLK is provided for both transmitted and received data
-          in RMII mode. This clock signal is provided by the PHY and is
-          typically derived from an external 25MHz crystal. Alternatively,
-          a 50MHz clock signal generated by an external oscillator can be
-          connected to pin REF_CLK. A third option is to connect a 25MHz
-          clock to pin CLK_IN_OUT. So, the REF_CLK should be configured
-          as input or output according to the actual circuit connection.
-          If present, indicates that the REF_CLK will be configured as
-          interface reference clock input when RMII mode enabled.
-          If not present, the REF_CLK will be configured as interface
-          reference clock output when RMII mode enabled.
-          Only supported on TJA1100 and TJA1101.
-
     required:
       - reg
 
@@ -60,6 +77,7 @@ examples:
         #size-cells = <0>;
 
         tja1101_phy0: ethernet-phy@4 {
+            compatible = "ethernet-phy-id0180.dc40";
             reg = <0x4>;
             nxp,rmii-refclk-in;
         };
-- 
2.34.1