linux-kernel - [PATCH v3 1/4] dt-bindings: Add binding for the Analogix ANX7688 chip

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Date:   Fri,  6 Mar 2020 15:12:13 +0100
From:   Enric Balletbo i Serra <enric.balletbo@...labora.com>
To:     linux-kernel@...r.kernel.org
Cc:     Collabora Kernel ML <kernel@...labora.com>,
        Andrzej Hajda <a.hajda@...sung.com>, megous@...ous.com,
        anarsoul@...il.com, Neil Armstrong <narmstrong@...libre.com>,
        matthias.bgg@...il.com, drinkcat@...omium.org, hsinyi@...omium.org,
        icenowy@...c.io, devicetree@...r.kernel.org,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Lee Jones <lee.jones@...aro.org>
Subject: [PATCH v3 1/4] dt-bindings: Add binding for the Analogix ANX7688 chip

The ANX7688 chip is a Type-C Port Controller, HDMI to DP converter and
USB-C mux between USB 3.0 lanes and the DP output.

For our use case a big part of the chip, like power supplies, control
gpios and the usb-c part is managed by an Embedded Controller, hence,
this is its simplest form of the binding. We'd prefer introduce these
properties for someone with a different use case so they can test
on their hardware.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
---

Changes in v3:
- Add binding for ANX7688 multi-function device.

Changes in v2: None

 .../bindings/mfd/analogix,anx7688.yaml        | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/analogix,anx7688.yaml

diff --git a/Documentation/devicetree/bindings/mfd/analogix,anx7688.yaml b/Documentation/devicetree/bindings/mfd/analogix,anx7688.yaml
new file mode 100644
index 000000000000..bb95a4e87188
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/analogix,anx7688.yaml
@@ -0,0 +1,48 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/analogix,anx7688.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analogix ANX7688 HDMI to USB Type-C Bridge (Port Controller with MUX)
+
+maintainers:
+  - Nicolas Boichat <drinkcat@...omium.org>
+  - Enric Balletbo i Serra <enric.balletbo@...labora.com>
+
+description: |
+  ANX7688 converts HDMI 2.0 to DisplayPort 1.3 Ultra-HDi (4096x2160p60)
+  including an intelligent crosspoint switch to support USB Type-C (USB-C).
+  The integrated crosspoint switch supports USB 3.1 data transfer along with
+  the DisplayPort Alternate Mode signaling over USB Type-C. Additionally,
+  an on-chip microcontroller (OCM) is available to manage the signal switching,
+  Channel Configuration (CC) detection, USB Power Delivery (USB-PD), Vendor
+  Defined Message (VDM) protocol support and other functions as defined in the
+  USB TypeC and USB Power Delivery specifications.
+
+  As a result, a multi-function device is exposed as parent of the video
+  bridge, TCPC and MUX blocks.
+
+properties:
+  compatible:
+    const: analogix,anx7688
+
+  reg:
+    maxItems: 1
+    description: I2C address of the device
+
+required:
+  - compatible
+  - reg
+
+examples:
+  - |
+    i2c0 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        anx7688: anx7688@2c {
+            compatible = "analogix,anx7688";
+            reg = <0x2c>;
+        };
+    };
-- 
2.25.1