linux-kernel - [PATCH v4 2/6] dt-bindings: net: dsa: mediatek,mt7530: fix reset lines

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Message-Id: <20220820080758.9829-3-arinc.unal@arinc9.com>
Date:   Sat, 20 Aug 2022 11:07:54 +0300
From:   Arınç ÜNAL <arinc.unal@...nc9.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Frank Wunderlich <frank-w@...lic-files.de>,
        Luiz Angelo Daros de Luca <luizluca@...il.com>,
        Sander Vanheule <sander@...nheule.net>,
        René van Dorst <opensource@...rst.com>,
        Daniel Golle <daniel@...rotopia.org>, erkin.bozoglu@...ont.com,
        Sergio Paracuellos <sergio.paracuellos@...il.com>
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Arınç ÜNAL <arinc.unal@...nc9.com>
Subject: [PATCH v4 2/6] dt-bindings: net: dsa: mediatek,mt7530: fix reset lines

- Fix description of mediatek,mcm. mediatek,mcm is not used on MT7623NI.
- Add description for reset-gpios.
- Invalidate reset-gpios if mediatek,mcm is used. We cannot use multiple
reset lines at the same time.
- Invalidate mediatek,mcm if the compatible device is mediatek,mt7531.
There is no multi-chip module version of mediatek,mt7531.
- Require mediatek,mcm for mediatek,mt7621 as the compatible string is only
used for the multi-chip module version of MT7530.

Signed-off-by: Arınç ÜNAL <arinc.unal@...nc9.com>
---
 .../bindings/net/dsa/mediatek,mt7530.yaml     | 31 +++++++++++++++++--
 1 file changed, 28 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
index edf48e917173..4c99266ce82a 100644
--- a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
@@ -110,11 +110,15 @@ properties:
   mediatek,mcm:
     type: boolean
     description:
-      if defined, indicates that either MT7530 is the part on multi-chip
-      module belong to MT7623A has or the remotely standalone chip as the
-      function MT7623N reference board provided for.
+      Used for MT7621AT, MT7621DAT, MT7621ST and MT7623AI SoCs which the MT7530
+      switch is a part of the multi-chip module.
 
   reset-gpios:
+    description:
+      GPIO to reset the switch. Use this if mediatek,mcm is not used.
+      This property is optional because some boards share the reset line with
+      other components which makes it impossible to probe the switch if the
+      reset line is used.
     maxItems: 1
 
   reset-names:
@@ -165,6 +169,9 @@ allOf:
       required:
         - mediatek,mcm
     then:
+      properties:
+        reset-gpios: false
+
       required:
         - resets
         - reset-names
@@ -182,6 +189,24 @@ allOf:
         - core-supply
         - io-supply
 
+  - if:
+      properties:
+        compatible:
+          items:
+            - const: mediatek,mt7531
+    then:
+      properties:
+        mediatek,mcm: false
+
+  - if:
+      properties:
+        compatible:
+          items:
+            - const: mediatek,mt7621
+    then:
+      required:
+        - mediatek,mcm
+
 unevaluatedProperties: false
 
 examples:
-- 
2.34.1