[PATCH v4 2/6] dt-bindings: display: imx: Add i.MX8qxp/qm PRG binding

[Liu Ying]

This patch adds bindings for i.MX8qxp/qm Display Prefetch Resolve Gasket.

Reviewed-by: Rob Herring <robh at kernel.org>
Signed-off-by: Liu Ying <victor.liu at nxp.com>
---
Note that this depends on the 'two cell binding' clock patch set which has
already landed in Shawn's i.MX clk/imx git branch.  Otherwise, imx8-lpcg.h
won't be found.

v3->v4:
* Improve compatible property by using enum instead of oneOf+const. (Rob)
* Add Rob's R-b tag.

v2->v3:
* No change.

v1->v2:
* Use new dt binding way to add clocks in the example.

 .../bindings/display/imx/fsl,imx8qxp-prg.yaml      | 60 ++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-prg.yaml

diff --git a/Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-prg.yaml b/Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-prg.yaml
new file mode 100644
index 00000000..3ff46e0
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/imx/fsl,imx8qxp-prg.yaml
@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/imx/fsl,imx8qxp-prg.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX8qm/qxp Display Prefetch Resolve Gasket
+
+maintainers:
+  - Liu Ying <victor.liu at nxp.com>
+
+description: |
+  The i.MX8qm/qxp Prefetch Resolve Gasket (PRG) is a gasket interface between
+  RTRAM controller and Display Controller.  The main function is to convert
+  the AXI interface to the RTRAM interface, which includes re-mapping the
+  ARADDR to a RTRAM address.
+
+properties:
+  compatible:
+    enum:
+      - fsl,imx8qxp-prg
+      - fsl,imx8qm-prg
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: rtram clock
+      - description: apb clock
+
+  clock-names:
+    items:
+      - const: rtram
+      - const: apb
+
+  power-domains:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - power-domains
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx8-lpcg.h>
+    #include <dt-bindings/firmware/imx/rsrc.h>
+    prg at 56040000 {
+        compatible = "fsl,imx8qxp-prg";
+        reg = <0x56040000 0x10000>;
+        clocks = <&dc0_prg0_lpcg IMX_LPCG_CLK_0>,
+                 <&dc0_prg0_lpcg IMX_LPCG_CLK_4>;
+        clock-names = "rtram", "apb";
+        power-domains = <&pd IMX_SC_R_DC_0>;
+    };
-- 
2.7.4