dt-bindings: Another pass removing cases of 'allOf' containing a '$ref'

Another pass at removing unnecessary use of 'allOf' with 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.

Cc: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Guenter Roeck <groeck@chromium.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Vignesh Raghavendra <vigneshr@ti.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Sebastian Reichel <sre@kernel.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-By: Vinod Koul <vkoul@kernel.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Marek Behún <kabel@kernel.org>
Acked-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220228213802.1639658-1-robh@kernel.org

Documentation/devicetree/bindings/connector/usb-connector.yaml

@@ -104,8 +104,7 @@ properties:
       - "1.5A" and "3.0A", 5V 1.5A and 5V 3.0A respectively, as defined in USB
         Type-C Cable and Connector specification, when Power Delivery is not
         supported.
-    allOf:
-      - $ref: /schemas/types.yaml#/definitions/string
+    $ref: /schemas/types.yaml#/definitions/string
     enum:
       - default
       - 1.5A

Documentation/devicetree/bindings/display/brcm,bcm2711-hdmi.yaml

@@ -72,8 +72,7 @@ properties:
       - const: hpd-removed
 
   ddc:
-    allOf:
-      - $ref: /schemas/types.yaml#/definitions/phandle
+    $ref: /schemas/types.yaml#/definitions/phandle
     description: >
       Phandle of the I2C controller used for DDC EDID probing
 

Documentation/devicetree/bindings/display/bridge/adi,adv7511.yaml

@@ -76,9 +76,8 @@ properties:
 
   adi,input-depth:
     description: Number of bits per color component at the input.
-    allOf:
-      - $ref: /schemas/types.yaml#/definitions/uint32
-      - enum: [ 8, 10, 12 ]
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 8, 10, 12 ]
 
   adi,input-colorspace:
     description: Input color space.

Documentation/devicetree/bindings/display/bridge/synopsys,dw-hdmi.yaml

@@ -26,9 +26,8 @@ properties:
   reg-io-width:
     description:
       Width (in bytes) of the registers specified by the reg property.
-    allOf:
-      - $ref: /schemas/types.yaml#/definitions/uint32
-      - enum: [1, 4]
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [1, 4]
     default: 1
 
   clocks:

Documentation/devicetree/bindings/display/panel/display-timings.yaml

@@ -31,8 +31,7 @@ properties:
 patternProperties:
   "^timing":
     type: object
-    allOf:
-      - $ref: panel-timing.yaml#
+    $ref: panel-timing.yaml#
 
 additionalProperties: false
 

Documentation/devicetree/bindings/display/ste,mcde.yaml

@@ -58,8 +58,8 @@ patternProperties:
   "^dsi@[0-9a-f]+$":
     description: subnodes for the three DSI host adapters
     type: object
-    allOf:
-      - $ref: dsi-controller.yaml#
+    $ref: dsi-controller.yaml#
+
     properties:
       compatible:
         const: ste,mcde-dsi

Documentation/devicetree/bindings/input/adc-joystick.yaml

@@ -61,11 +61,10 @@ patternProperties:
         description: EV_ABS specific event code generated by the axis.
 
       abs-range:
-        allOf:
-          - $ref: /schemas/types.yaml#/definitions/uint32-array
-          - items:
-              - description: minimum value
-              - description: maximum value
+        $ref: /schemas/types.yaml#/definitions/uint32-array
+        items:
+          - description: minimum value
+          - description: maximum value
         description: >
           Minimum and maximum values produced by the axis.
           For an ABS_X axis this will be the left-most and right-most

Documentation/devicetree/bindings/leds/cznic,turris-omnia-leds.yaml

@@ -32,8 +32,7 @@ properties:
 patternProperties:
   "^multi-led@[0-9a-b]$":
     type: object
-    allOf:
-      - $ref: leds-class-multicolor.yaml#
+    $ref: leds-class-multicolor.yaml#
     description:
       This node represents one of the RGB LED devices on Turris Omnia.
       No subnodes need to be added for subchannels since this controller only

Documentation/devicetree/bindings/leds/leds-lp50xx.yaml

@@ -55,8 +55,7 @@ properties:
 patternProperties:
   '^multi-led@[0-9a-f]$':
     type: object
-    allOf:
-      - $ref: leds-class-multicolor.yaml#
+    $ref: leds-class-multicolor.yaml#
     properties:
       reg:
         minItems: 1

Documentation/devicetree/bindings/mfd/google,cros-ec.yaml

@@ -38,18 +38,14 @@ properties:
     description:
       This property specifies the delay in usecs between the
       assertion of the CS and the first clock pulse.
-    allOf:
-      - $ref: /schemas/types.yaml#/definitions/uint32
-      - default: 0
-      - minimum: 0
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 0
 
   google,cros-ec-spi-msg-delay:
     description:
       This property specifies the delay in usecs between messages.
-    allOf:
-      - $ref: /schemas/types.yaml#/definitions/uint32
-      - default: 0
-      - minimum: 0
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 0
 
   google,has-vbc-nvram:
     description:

Documentation/devicetree/bindings/mtd/rockchip,nand-controller.yaml

@@ -96,8 +96,7 @@ patternProperties:
 
       rockchip,boot-ecc-strength:
         enum: [16, 24, 40, 60, 70]
-        allOf:
-          - $ref: /schemas/types.yaml#/definitions/uint32
+        $ref: /schemas/types.yaml#/definitions/uint32
         description: |
           If specified it indicates that a different BCH/ECC setting is
           supported by the boot ROM.

Documentation/devicetree/bindings/net/ti,cpsw-switch.yaml

@@ -88,8 +88,7 @@ properties:
         type: object
         description: CPSW external ports
 
-        allOf:
-          - $ref: ethernet-controller.yaml#
+        $ref: ethernet-controller.yaml#
 
         properties:
           reg:

Documentation/devicetree/bindings/phy/phy-stm32-usbphyc.yaml

@@ -76,8 +76,7 @@ patternProperties:
 
       connector:
         type: object
-        allOf:
-          - $ref: ../connector/usb-connector.yaml
+        $ref: /schemas/connector/usb-connector.yaml
         properties:
           vbus-supply: true
 

Documentation/devicetree/bindings/power/supply/sbs,sbs-manager.yaml

@@ -46,9 +46,7 @@ additionalProperties: false
 patternProperties:
   "^i2c@[1-4]$":
     type: object
-
-    allOf:
-      - $ref: /schemas/i2c/i2c-controller.yaml#
+    $ref: /schemas/i2c/i2c-controller.yaml#
 
 examples:
   - |

Documentation/devicetree/bindings/remoteproc/ti,k3-r5f-rproc.yaml

@@ -95,8 +95,7 @@ patternProperties:
       addresses. Cache and memory access settings are provided through a
       Memory Protection Unit (MPU), programmable only from the R5Fs.
 
-    allOf:
-      - $ref: /schemas/arm/keystone/ti,k3-sci-common.yaml#
+    $ref: /schemas/arm/keystone/ti,k3-sci-common.yaml#
 
     properties:
       compatible:

Documentation/devicetree/bindings/soc/ti/ti,pruss.yaml

@@ -281,10 +281,7 @@ patternProperties:
       PRUSS INTC Node. Each PRUSS has a single interrupt controller instance
       that is common to all the PRU cores. This should be represented as an
       interrupt-controller node.
-
-    allOf:
-      - $ref: /schemas/interrupt-controller/ti,pruss-intc.yaml#
-
+    $ref: /schemas/interrupt-controller/ti,pruss-intc.yaml#
     type: object
 
   mdio@[a-f0-9]+$:
@@ -292,10 +289,7 @@ patternProperties:
       MDIO Node. Each PRUSS has an MDIO module that can be used to control
       external PHYs. The MDIO module used within the PRU-ICSS is an instance of
       the MDIO Controller used in TI Davinci SoCs.
-
-    allOf:
-      - $ref: /schemas/net/ti,davinci-mdio.yaml#
-
+    $ref: /schemas/net/ti,davinci-mdio.yaml#
     type: object
 
   "^(pru|rtu|txpru)@[0-9a-f]+$":
@@ -305,10 +299,7 @@ patternProperties:
       inactive by using the standard DT string property, "status". The ICSSG IP
       present on K3 SoCs have additional auxiliary PRU cores with slightly
       different IP integration.
-
-    allOf:
-      - $ref: /schemas/remoteproc/ti,pru-rproc.yaml#
-
+    $ref: /schemas/remoteproc/ti,pru-rproc.yaml#
     type: object
 
 required:

Documentation/devicetree/bindings/sound/st,stm32-sai.yaml

@@ -115,8 +115,7 @@ patternProperties:
           By default, custom protocol is assumed, meaning that protocol is
           configured according to protocol defined in related DAI link node,
           such as i2s, left justified, right justified, dsp and pdm protocols.
-        allOf:
-          - $ref: /schemas/types.yaml#/definitions/flag
+        $ref: /schemas/types.yaml#/definitions/flag
 
       "#clock-cells":
         description: Configure the SAI device as master clock provider.

Documentation/devicetree/bindings/sound/tlv320adcx140.yaml

@@ -176,13 +176,12 @@ patternProperties:
        4 - Drive weak low and active high
        5 - Drive Hi-Z and active high
 
-    allOf:
-      - $ref: /schemas/types.yaml#/definitions/uint32-array
-      - minItems: 2
-        maxItems: 2
-        items:
-          maximum: 15
-        default: [2, 2]
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 2
+    maxItems: 2
+    items:
+      maximum: 15
+    default: [2, 2]
 
 required:
   - compatible

Documentation/devicetree/bindings/spi/spi-controller.yaml

@@ -93,9 +93,7 @@ properties:
 patternProperties:
   "^.*@[0-9a-f]+$":
     type: object
-
-    allOf:
-      - $ref: spi-peripheral-props.yaml
+    $ref: spi-peripheral-props.yaml
 
     required:
       - compatible

Documentation/devicetree/bindings/usb/st,stusb160x.yaml

@@ -32,9 +32,7 @@ properties:
 
   connector:
     type: object
-
-    allOf:
-      - $ref: ../connector/usb-connector.yaml
+    $ref: /schemas/connector/usb-connector.yaml#
 
     properties:
       compatible: