linux-kernel - [PATCH 8/8] dt-bindings: display: Add SSD132x OLED controllers

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Message-ID: <20231009183522.543918-9-javierm@redhat.com>
Date:   Mon,  9 Oct 2023 20:34:22 +0200
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Javier Martinez Canillas <javierm@...hat.com>,
        Conor Dooley <conor+dt@...nel.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH 8/8] dt-bindings: display: Add SSD132x OLED controllers

Add a Device Tree binding schema for the OLED panels based on the Solomon
SSD132x family of controllers.

Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>
---

 .../bindings/display/solomon,ssd132x.yaml     | 116 ++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/solomon,ssd132x.yaml

diff --git a/Documentation/devicetree/bindings/display/solomon,ssd132x.yaml b/Documentation/devicetree/bindings/display/solomon,ssd132x.yaml
new file mode 100644
index 000000000000..b64904703a3a
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/solomon,ssd132x.yaml
@@ -0,0 +1,116 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/solomon,ssd132x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Solomon SSD132x OLED Controllers
+
+maintainers:
+  - Javier Martinez Canillas <javierm@...hat.com>
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - solomon,ssd1322
+          - solomon,ssd1325
+          - solomon,ssd1327
+
+  reg:
+    maxItems: 1
+
+  reset-gpios:
+    maxItems: 1
+
+  # Only required for SPI
+  dc-gpios:
+    description:
+      GPIO connected to the controller's D/C# (Data/Command) pin,
+      that is needed for 4-wire SPI to tell the controller if the
+      data sent is for a command register or the display data RAM
+    maxItems: 1
+
+  solomon,height:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Height in pixel of the screen driven by the controller.
+      The default value is controller-dependent.
+
+  solomon,width:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Width in pixel of the screen driven by the controller.
+      The default value is controller-dependent.
+
+required:
+  - compatible
+  - reg
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: solomon,ssd1322
+    then:
+      properties:
+        width:
+          default: 480
+        height:
+          default: 128
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: solomon,ssd1325
+    then:
+      properties:
+        width:
+          default: 128
+        height:
+          default: 80
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: solomon,ssd1327
+    then:
+      properties:
+        width:
+          default: 128
+        height:
+          default: 128
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    i2c {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            ssd1327_i2c: oled@3c {
+                    compatible = "solomon,ssd1327";
+                    reg = <0x3c>;
+                    reset-gpios = <&gpio2 7>;
+            };
+
+    };
+  - |
+    spi {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            ssd1327_spi: oled@0 {
+                    compatible = "solomon,ssd1327";
+                    reg = <0x0>;
+                    reset-gpios = <&gpio2 7>;
+                    dc-gpios = <&gpio2 8>;
+                    spi-max-frequency = <10000000>;
+            };
+    };
-- 
2.41.0