[PATCH 2/6] dt-bindings: reserved-memory: Support framebuffer reserved memory

[Thierry Reding <thierry.reding@gmail.com>]

From: Thierry Reding <treding@nvidia.com>

Document the "framebuffer" compatible string for reserved memory nodes
to annotate reserved memory regions used for framebuffer carveouts.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 .../bindings/reserved-memory/framebuffer.yaml | 46 +++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/reserved-memory/framebuffer.yaml

diff --git a/Documentation/devicetree/bindings/reserved-memory/framebuffer.yaml b/Documentation/devicetree/bindings/reserved-memory/framebuffer.yaml
new file mode 100644
index 000000000000..80574854025d
--- /dev/null
+++ b/Documentation/devicetree/bindings/reserved-memory/framebuffer.yaml
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/reserved-memory/framebuffer.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: /reserved-memory framebuffer node bindings
+
+maintainers:
+  - devicetree-spec@vger.kernel.org
+
+allOf:
+  - $ref: "reserved-memory.yaml"
+
+properties:
+  compatible:
+    const: framebuffer
+    description: >
+      This indicates a region of memory meant to be used as a framebuffer for
+      a set of display devices. It can be used by an operating system to keep
+      the framebuffer from being overwritten and use it as the backing memory
+      for a display device (such as simple-framebuffer).
+
+unevaluatedProperties: false
+
+examples:
+  - |
+      chosen {
+        framebuffer {
+          compatible = "simple-framebuffer";
+          memory-region = <&fb>;
+        };
+      };
+
+      reserved-memory {
+          #address-cells = <1>;
+          #size-cells = <1>;
+          ranges;
+
+          fb: framebuffer@80000000 {
+              compatible = "framebuffer";
+              reg = <0x80000000 0x007e9000>;
+          };
+      };
+
+...
-- 
2.37.2