linux-kernel - [v16 2/4] dt-bindings: i2c: Add Maxim MAX735x/MAX736x variants

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Message-ID: <20230821062027.2631725-3-patrick.rudolph@9elements.com>
Date:   Mon, 21 Aug 2023 08:20:22 +0200
From:   Patrick Rudolph <patrick.rudolph@...ements.com>
To:     Peter Rosin <peda@...ntia.se>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     naresh.solanki@...ements.com,
        Patrick Rudolph <patrick.rudolph@...ements.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-i2c@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [v16 2/4] dt-bindings: i2c: Add Maxim MAX735x/MAX736x variants

Update the pca954x bindings to add support for the Maxim MAX735x/MAX736x
chips. The functionality will be provided by the existing pca954x driver.

For chips that are powered off by default add a regulator called vdd-supply.

Signed-off-by: Patrick Rudolph <patrick.rudolph@...ements.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 .../bindings/i2c/i2c-mux-pca954x.yaml         | 23 +++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml b/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml
index e5c1070903ef..2d7bb998b0e9 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml
+++ b/Documentation/devicetree/bindings/i2c/i2c-mux-pca954x.yaml
@@ -4,18 +4,29 @@
 $id: http://devicetree.org/schemas/i2c/i2c-mux-pca954x.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: NXP PCA954x I2C bus switch
+title: NXP PCA954x I2C and compatible bus switches
 
 maintainers:
   - Laurent Pinchart <laurent.pinchart@...asonboard.com>
 
 description:
-  The binding supports NXP PCA954x and PCA984x I2C mux/switch devices.
+  The NXP PCA954x and compatible devices are I2C bus
+  multiplexer/switches that share the same functionality
+  and register layout.
+  The devices usually have 4 or 8 child buses, which are
+  attached to the parent bus by using the SMBus "Send Byte"
+  command.
 
 properties:
   compatible:
     oneOf:
       - enum:
+          - maxim,max7356
+          - maxim,max7357
+          - maxim,max7358
+          - maxim,max7367
+          - maxim,max7368
+          - maxim,max7369
           - nxp,pca9540
           - nxp,pca9542
           - nxp,pca9543
@@ -56,6 +67,10 @@ properties:
     description: if present, overrides i2c-mux-idle-disconnect
     $ref: /schemas/mux/mux-controller.yaml#/properties/idle-state
 
+  vdd-supply:
+    description: A voltage regulator supplying power to the chip. On PCA9846
+      the regulator supplies power to VDD2 (core logic) and optionally to VDD1.
+
 required:
   - compatible
   - reg
@@ -68,6 +83,8 @@ allOf:
           compatible:
             contains:
               enum:
+                - maxim,max7367
+                - maxim,max7369
                 - nxp,pca9542
                 - nxp,pca9543
                 - nxp,pca9544
@@ -94,6 +111,8 @@ examples:
             #size-cells = <0>;
             reg = <0x74>;
 
+            vdd-supply = <&p3v3>;
+
             interrupt-parent = <&ipic>;
             interrupts = <17 IRQ_TYPE_LEVEL_LOW>;
             interrupt-controller;
-- 
2.41.0