dt-bindings: Remove cases of 'allOf' containing a '$ref'

json-schema versions draft7 and earlier have a weird behavior in that
any keywords combined with a '$ref' are ignored (silently). The correct
form was to put a '$ref' under an 'allOf'. This behavior is now changed
in the 2019-09 json-schema spec and '$ref' can be mixed with other
keywords. The json-schema library doesn't yet support this, but the
tooling now does a fixup for this and either way works.

This has been a constant source of review comments, so let's change this
treewide so everyone copies the simpler syntax.

Scripted with ruamel.yaml with some manual fixups. Some minor whitespace
changes from the script.

Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-By: Vinod Koul <vkoul@kernel.org>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Wolfram Sang <wsa@the-dreams.de> # for I2C
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> #for-iio
Reviewed-by: Stephen Boyd <sboyd@kernel.org> # clock
Signed-off-by: Rob Herring <robh@kernel.org>

5 files changed, 65 insertions, 83 deletions

diff --git a/Documentation/devicetree/bindings/display/allwinner,sun4i-a10-display-engine.yaml b/Documentation/devicetree/bindings/display/allwinner,sun4i-a10-display-engine.yaml
index 944ff2f1cf93..e77523b02fad 100644
--- a/Documentation/devicetree/bindings/display/allwinner,sun4i-a10-display-engine.yaml
+++ b/Documentation/devicetree/bindings/display/allwinner,sun4i-a10-display-engine.yaml
@@ -66,10 +66,9 @@ properties:
       - allwinner,sun50i-h6-display-engine
 
   allwinner,pipelines:
-    allOf:
-      - $ref: /schemas/types.yaml#/definitions/phandle-array
-      - minItems: 1
-        maxItems: 2
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    minItems: 1
+    maxItems: 2
     description: |
       Available display engine frontends (DE 1.0) or mixers (DE
       2.0/3.0) available.
diff --git a/Documentation/devicetree/bindings/display/allwinner,sun4i-a10-tcon.yaml b/Documentation/devicetree/bindings/display/allwinner,sun4i-a10-tcon.yaml
index 87cb77b32ee3..4c15a2644a7c 100644
--- a/Documentation/devicetree/bindings/display/allwinner,sun4i-a10-tcon.yaml
+++ b/Documentation/devicetree/bindings/display/allwinner,sun4i-a10-tcon.yaml
@@ -71,11 +71,10 @@ properties:
     maxItems: 4
 
   clock-output-names:
-    allOf:
-      - $ref: /schemas/types.yaml#/definitions/string-array
-      - maxItems: 1
     description:
       Name of the LCD pixel clock created.
+    $ref: /schemas/types.yaml#/definitions/string-array
+    maxItems: 1
 
   dmas:
     maxItems: 1
diff --git a/Documentation/devicetree/bindings/display/panel/panel-common.yaml b/Documentation/devicetree/bindings/display/panel/panel-common.yaml
index ed051ba12084..db3d270a33c6 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-common.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-common.yaml
@@ -48,9 +48,8 @@ properties:
   rotation:
     description:
       Display rotation in degrees counter clockwise (0,90,180,270)
-    allOf:
-      - $ref: /schemas/types.yaml#/definitions/uint32
-      - enum: [ 0, 90, 180, 270 ]
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 90, 180, 270]
 
   # Display Timings
   panel-timing:
@@ -58,16 +57,14 @@ properties:
       Most display panels are restricted to a single resolution and
       require specific display timings. The panel-timing subnode expresses those
       timings.
-    allOf:
-      - $ref: panel-timing.yaml#
+    $ref: panel-timing.yaml#
 
   display-timings:
     description:
       Some display panels supports several resolutions with different timing.
       The display-timings bindings supports specifying several timings and
       optional specify which is the native mode.
-    allOf:
-      - $ref: display-timings.yaml#
+    $ref: display-timings.yaml#
 
   # Connectivity
   port:
diff --git a/Documentation/devicetree/bindings/display/panel/panel-timing.yaml b/Documentation/devicetree/bindings/display/panel/panel-timing.yaml
index bd558ad7891f..182c19cb7fdd 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-timing.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-timing.yaml
@@ -72,92 +72,80 @@ properties:
   hfront-porch:
     description: Horizontal front porch panel timing
     oneOf:
-      - allOf:
-        - $ref: /schemas/types.yaml#/definitions/uint32
-        - maxItems: 1
-          items:
-            description: typical number of pixels
-      - allOf:
-        - $ref: /schemas/types.yaml#/definitions/uint32-array
-        - minItems: 3
-          maxItems: 3
-          items:
-            description: min, typ, max number of pixels
+      - $ref: /schemas/types.yaml#/definitions/uint32
+        maxItems: 1
+        items:
+          description: typical number of pixels
+      - $ref: /schemas/types.yaml#/definitions/uint32-array
+        minItems: 3
+        maxItems: 3
+        items:
+          description: min, typ, max number of pixels
 
   hback-porch:
     description: Horizontal back porch timing
     oneOf:
-      - allOf:
-        - $ref: /schemas/types.yaml#/definitions/uint32
-        - maxItems: 1
-          items:
-            description: typical number of pixels
-      - allOf:
-        - $ref: /schemas/types.yaml#/definitions/uint32-array
-        - minItems: 3
-          maxItems: 3
-          items:
-            description: min, typ, max number of pixels
+      - $ref: /schemas/types.yaml#/definitions/uint32
+        maxItems: 1
+        items:
+          description: typical number of pixels
+      - $ref: /schemas/types.yaml#/definitions/uint32-array
+        minItems: 3
+        maxItems: 3
+        items:
+          description: min, typ, max number of pixels
 
   hsync-len:
     description: Horizontal sync length panel timing
     oneOf:
-      - allOf:
-        - $ref: /schemas/types.yaml#/definitions/uint32
-        - maxItems: 1
-          items:
-            description: typical number of pixels
-      - allOf:
-        - $ref: /schemas/types.yaml#/definitions/uint32-array
-        - minItems: 3
-          maxItems: 3
-          items:
-            description: min, typ, max number of pixels
+      - $ref: /schemas/types.yaml#/definitions/uint32
+        maxItems: 1
+        items:
+          description: typical number of pixels
+      - $ref: /schemas/types.yaml#/definitions/uint32-array
+        minItems: 3
+        maxItems: 3
+        items:
+          description: min, typ, max number of pixels
 
   vfront-porch:
     description: Vertical front porch panel timing
     oneOf:
-      - allOf:
-        - $ref: /schemas/types.yaml#/definitions/uint32
-        - maxItems: 1
-          items:
-            description: typical number of lines
-      - allOf:
-        - $ref: /schemas/types.yaml#/definitions/uint32-array
-        - minItems: 3
-          maxItems: 3
-          items:
-            description: min, typ, max number of lines
+      - $ref: /schemas/types.yaml#/definitions/uint32
+        maxItems: 1
+        items:
+          description: typical number of lines
+      - $ref: /schemas/types.yaml#/definitions/uint32-array
+        minItems: 3
+        maxItems: 3
+        items:
+          description: min, typ, max number of lines
 
   vback-porch:
     description: Vertical back porch panel timing
     oneOf:
-      - allOf:
-        - $ref: /schemas/types.yaml#/definitions/uint32
-        - maxItems: 1
-          items:
-            description: typical number of lines
-      - allOf:
-        - $ref: /schemas/types.yaml#/definitions/uint32-array
-        - minItems: 3
-          maxItems: 3
-          items:
-            description: min, typ, max number of lines
+      - $ref: /schemas/types.yaml#/definitions/uint32
+        maxItems: 1
+        items:
+          description: typical number of lines
+      - $ref: /schemas/types.yaml#/definitions/uint32-array
+        minItems: 3
+        maxItems: 3
+        items:
+          description: min, typ, max number of lines
 
   vsync-len:
     description: Vertical sync length panel timing
     oneOf:
-      - allOf:
-        - $ref: /schemas/types.yaml#/definitions/uint32
-        - maxItems: 1
-          items:
-            description: typical number of lines
-      - allOf:
-        - $ref: /schemas/types.yaml#/definitions/uint32-array
-        - minItems: 3
-          maxItems: 3
-          items:
-            description: min, typ, max number of lines
+      - $ref: /schemas/types.yaml#/definitions/uint32
+        maxItems: 1
+        items:
+          description: typical number of lines
+      - $ref: /schemas/types.yaml#/definitions/uint32-array
+        minItems: 3
+        maxItems: 3
+        items:
+          description: min, typ, max number of lines
 
   hsync-active:
     description: |
diff --git a/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml b/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml
index eb04c2330698..7af21bde32e4 100644
--- a/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml
+++ b/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml
@@ -88,9 +88,8 @@ properties:
       - "#size-cells"
 
   ti,am65x-oldi-io-ctrl:
-    allOf:
-      - $ref: "/schemas/types.yaml#/definitions/phandle-array"
-      - maxItems: 1
+    $ref: "/schemas/types.yaml#/definitions/phandle-array"
+    maxItems: 1
     description:
       phandle to syscon device node mapping OLDI IO_CTRL registers.
       The mapped range should point to OLDI_DAT0_IO_CTRL, map it and