[PATCH 1/2 v6] drm/panel: Add DT bindings for Sony ACX424AKP

[Linus Walleij]

This adds device tree bindings for the Sony ACX424AKP panel.
Let's use YAML.

Cc: devicetree at vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
---
ChangeLog v5->v6:
- Fix the binding by simply not referencing the display controller
  bindings from a panel binding.
ChangeLog v4->v5:
- Fix up all warnings etc incurred from the now working schema check
  and DTS compilation.
- I still have a vert annoying error message in the Sony
  panel bindings that uses this schema:
  sony,acx424akp.example.dt.yaml: panel at 0: $nodename:0: 'panel at 0' does not match '^dsi-controller(@.*)?$'
  As this is modeled very closely to
  Documentation/devicetree/bindings/net/mdio.yaml
  and that one doesn't emit this type of warning for its ethernet-phy at 0
  etc I am pretty much clueless and just can't see what the problem
  is.
- If I can't figure this out the only viable next step is to drop the
  ambition to create yaml bindings simply because I'm unable to do
  it, and go back to traditional text bindings :(
ChangeLog v3->v4:
- Adjust to adjusted DSI bindings.
ChangeLog v2->v3:
- Put the example inside a dsi-controller so we have a complete
  example that verifies to the DSI panel generic binding.
ChangeLog v1->v2:
- Suggest a stand-alone YAML bindings file for DSI panels in
  a separate patch, and use that to reference the
  boolean "enforce-video-mode" attribute for DSI panels
---
 .../display/panel/sony,acx424akp.yaml         | 49 +++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/panel/sony,acx424akp.yaml

diff --git a/Documentation/devicetree/bindings/display/panel/sony,acx424akp.yaml b/Documentation/devicetree/bindings/display/panel/sony,acx424akp.yaml
new file mode 100644
index 000000000000..185dcc8fd1f9
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/sony,acx424akp.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/sony,acx424akp.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sony ACX424AKP 4" 480x864 AMOLED panel
+
+maintainers:
+  - Linus Walleij <linus.walleij at linaro.org>
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    const: sony,acx424akp
+  reg: true
+  reset-gpios: true
+  vddi-supply:
+     description: regulator that supplies the vddi voltage
+  enforce-video-mode: true
+
+required:
+  - compatible
+  - reg
+  - reset-gpios
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    dsi-controller at a0351000 {
+        compatible = "ste,mcde-dsi";
+        reg = <0xa0351000 0x1000>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        panel at 0 {
+            compatible = "sony,acx424akp";
+            reg = <0>;
+            vddi-supply = <&foo>;
+            reset-gpios = <&foo_gpio 0 GPIO_ACTIVE_LOW>;
+        };
+    };
+
+...
-- 
2.21.0