[PATCH v2 1/3] dt-bindings: display: add bindings for MIPI DBI compatible SPI panels

[Noralf Trønnes]

Add binding for MIPI DBI compatible SPI panels.

v2:
- Fix path for panel-common.yaml
- Use unevaluatedProperties
- Drop properties which are in the allOf section
- Drop model property (Rob)

Signed-off-by: Noralf Trønnes <noralf at tronnes.org>
---
 .../display/panel/panel-mipi-dbi-spi.yaml     | 59 +++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml

diff --git a/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml b/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml
new file mode 100644
index 000000000000..b7cbeea0f8aa
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml
@@ -0,0 +1,59 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/panel-mipi-dbi-spi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MIPI DBI SPI Panels Device Tree Bindings
+
+maintainers:
+  - Noralf Trønnes <noralf at tronnes.org>
+
+description:
+  This binding is for display panels using a MIPI DBI controller
+  in SPI mode.
+
+allOf:
+  - $ref: panel-common.yaml#
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+properties:
+  compatible:
+    const: panel-mipi-dbi-spi
+
+  write-only:
+    type: boolean
+    description:
+      Controller is not readable (ie. MISO is not wired up).
+
+  dc-gpios:
+    maxItems: 1
+    description: |
+      Controller data/command selection (D/CX) in 4-line SPI mode.
+      If not set, the controller is in 3-line SPI mode.
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    spi {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            display at 0{
+                    compatible = "panel-mipi-dbi-spi";
+                    reg = <0>;
+                    spi-max-frequency = <40000000>;
+                    dc-gpios = <&gpio 24 GPIO_ACTIVE_HIGH>;
+                    reset-gpios = <&gpio 25 GPIO_ACTIVE_HIGH>;
+                    write-only;
+            };
+    };
+
+...
-- 
2.33.0