linux-kernel - [PATCH v2 09/10] dt-bindings: pinctrl: mediatek,mt6779-pinctrl: Document MT6735 pin controller bindings

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Date:   Wed,  5 Oct 2022 20:43:42 +0300
From:   Yassine Oudjana <yassine.oudjana@...il.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Sean Wang <sean.wang@...nel.org>,
        Andy Teng <andy.teng@...iatek.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     Yassine Oudjana <y.oudjana@...tonmail.com>,
        Yassine Oudjana <yassine.oudjana@...il.com>,
        linux-mediatek@...ts.infradead.org, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 09/10] dt-bindings: pinctrl: mediatek,mt6779-pinctrl: Document MT6735 pin controller bindings

From: Yassine Oudjana <y.oudjana@...tonmail.com>

Add bindings for the pin controller found on MediaTek MT6735 and
MT6735M SoCs, including describing a method to manually specify
a pin and function in the pinmux property making defining bindings
for each pin/function combination unnecessary. The pin controllers
on those SoCs are generally identical, with the only difference
being the lack of MSDC2 pins (198-203) on MT6735M.

Signed-off-by: Yassine Oudjana <y.oudjana@...tonmail.com>
---
 .../pinctrl/mediatek,mt6779-pinctrl.yaml      | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/Documentation/devicetree/bindings/pinctrl/mediatek,mt6779-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/mediatek,mt6779-pinctrl.yaml
index f10d1d5543cb..66a0178caa8e 100644
--- a/Documentation/devicetree/bindings/pinctrl/mediatek,mt6779-pinctrl.yaml
+++ b/Documentation/devicetree/bindings/pinctrl/mediatek,mt6779-pinctrl.yaml
@@ -18,6 +18,8 @@ description:
 properties:
   compatible:
     enum:
+      - mediatek,mt6735-pinctrl
+      - mediatek,mt6735m-pinctrl
       - mediatek,mt6765-pinctrl
       - mediatek,mt6779-pinctrl
       - mediatek,mt6795-pinctrl
@@ -61,6 +63,29 @@ required:
 
 allOf:
   - $ref: "pinctrl.yaml#"
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - mediatek,mt6735-pinctrl
+              - mediatek,mt6735m-pinctrl
+    then:
+      properties:
+        reg:
+          minItems: 8
+          maxItems: 8
+
+        reg-names:
+          items:
+            - const: gpio
+            - const: iocfg0
+            - const: iocfg1
+            - const: iocfg2
+            - const: iocfg3
+            - const: iocfg4
+            - const: iocfg5
+            - const: eint
   - if:
       properties:
         compatible:
@@ -185,6 +210,22 @@ patternProperties:
               }
             };
           };
+          The MTK_PIN_NO macro can also be used to select a pin and specify
+          a function index:
+          pincontroller {
+            /* Pin 19 set to function 0 (multifunction GPIO) */
+            gpio-pins {
+              pins {
+                pinmux = <(MTK_PIN_NO(19) | 0)>;
+              };
+            };
+            /* Pin 172 set to function 1 (primary function) */
+            msdc1-pins {
+              pins-cmd {
+                pinmux = <(MTK_PIN_NO(172) | 1)>;
+              };
+            };
+          };
         $ref: "pinmux-node.yaml"
 
         properties:
-- 
2.38.0