dt-bindings: Clean-up regulator '-supply' schemas

Regulator '*-supply' properties are always a single phandle, so 'maxItems: 1' or a $ref is not necessary. All that's needed is either 'true' or an optional 'description'. Following this clean-up, the meta-schema will enforce this pattern.

There's one case in tree with 'innolux,n156bge-l21' having 2 phandles. This appears to be a mistake or abuse of simple-panel as it's 2 different voltage rails connected to 'power-supply'.

Cc Neil Armstrong <[email protected]>

Cc Kevin Hilman <[email protected]>

Cc Jonathan Cameron <[email protected]>

Cc Krzysztof Kozlowski <[email protected]>

Cc Kishon Vijay Abraham I <[email protected]>

Cc Liam Girdwood <[email protected]>

Cc Mark Brown <[email protected]>

Cc [email protected]

Signed-off-by Rob Herring <[email protected]>

---
 .../devicetree/bindings/display/amlogic,meson-dw-hdmi.yaml   | 2 --
 Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml  | 3 +--
 Documentation/devicetree/bindings/gpu/arm,mali-midgard.yaml  | 3 +--
 Documentation/devicetree/bindings/gpu/arm,mali-utgard.yaml   | 3 +--
 Documentation/devicetree/bindings/iio/adc/adi,ad7124.yaml    | 3 ---
 Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml    | 5 +----
 Documentation/devicetree/bindings/iio/adc/adi,ad7780.yaml    | 1 -
 Documentation/devicetree/bindings/iio/adc/avia-hx711.yaml    | 1 -
 .../devicetree/bindings/iio/adc/samsung,exynos-adc.yaml      | 4 +---
 .../devicetree/bindings/iio/chemical/plantower,pms7003.yaml  | 1 -
 Documentation/devicetree/bindings/iio/pressure/bmp085.yaml   | 2 --
 .../devicetree/bindings/phy/amlogic,meson-g12a-usb2-phy.yaml | 1 -
 .../devicetree/bindings/regulator/fixed-regulator.yaml       | 1 -
 13 files changed, 5 insertions(+), 25 deletions(-)

Documentation/devicetree/bindings/display/amlogic,meson-dw-hdmi.yaml +0 -2

index fb747682006d..0da42ab8fd3a 100644
@@ -79,8 +79,6 @@ properties:
 
   hdmi-supply:
     description: phandle to an external 5V regulator to power the HDMI logic
-    allOf:
-      - $ref: /schemas/types.yaml#/definitions/phandle
 
   port@0:
     type: object

Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml +1 -2

index 5f1fd6d7ee0f..e50a0cc78fff 100644
@@ -37,8 +37,7 @@ properties:
   clocks:
     maxItems: 1
 
-  mali-supply:
-    maxItems: 1
+  mali-supply: true
 
   operating-points-v2: true
 

Documentation/devicetree/bindings/gpu/arm,mali-midgard.yaml +1 -2

index 47bc1ac36426..5c576e5019c6 100644
@@ -69,8 +69,7 @@ properties:
       - const: core
       - const: bus
 
-  mali-supply:
-    maxItems: 1
+  mali-supply: true
 
   resets:
     minItems: 1

Documentation/devicetree/bindings/gpu/arm,mali-utgard.yaml +1 -2

index c5d93c5839d3..afde81be3c29 100644
@@ -97,8 +97,7 @@ properties:
 
   memory-region: true
 
-  mali-supply:
-    maxItems: 1
+  mali-supply: true
 
   power-domains:
     maxItems: 1

Documentation/devicetree/bindings/iio/adc/adi,ad7124.yaml +0 -3

index 9692b7f719f5..e932d5aed02f 100644
@@ -45,15 +45,12 @@ properties:
 
   refin1-supply:
     description: refin1 supply can be used as reference for conversion.
-    maxItems: 1
 
   refin2-supply:
     description: refin2 supply can be used as reference for conversion.
-    maxItems: 1
 
   avdd-supply:
     description: avdd supply can be used as reference for conversion.
-    maxItems: 1
 
 required:
   - compatible

Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml +1 -4

index cc544fdc38be..6eb33207a167 100644
@@ -31,10 +31,7 @@ properties:
 
   spi-cpha: true
 
-  avcc-supply:
-    description:
-      Phandle to the Avcc power supply
-    maxItems: 1
+  avcc-supply: true
 
   interrupts:
     maxItems: 1

Documentation/devicetree/bindings/iio/adc/adi,ad7780.yaml +0 -1

index d1109416963c..9acde6d2e2d9 100644
@@ -39,7 +39,6 @@ properties:
   avdd-supply:
     description:
       The regulator supply for the ADC reference voltage.
-    maxItems: 1
 
   powerdown-gpios:
     description:

Documentation/devicetree/bindings/iio/adc/avia-hx711.yaml +0 -1

index d76ece97c76c..91ab9c842273 100644
@@ -41,7 +41,6 @@ properties:
   avdd-supply:
     description:
       Definition of the regulator used as analog supply
-    maxItems: 1
 
   clock-frequency:
     minimum: 20000

Documentation/devicetree/bindings/iio/adc/samsung,exynos-adc.yaml +1 -3

index b4c6c26681d9..9218b2efa62f 100644
@@ -46,9 +46,7 @@ properties:
   "#io-channel-cells":
     const: 1
 
-  vdd-supply:
-    description: VDD input supply
-    maxItems: 1
+  vdd-supply: true
 
   samsung,syscon-phandle:
     $ref: '/schemas/types.yaml#/definitions/phandle'

Documentation/devicetree/bindings/iio/chemical/plantower,pms7003.yaml +0 -1

index a551d3101f93..19e53930ebf6 100644
@@ -25,7 +25,6 @@ properties:
 
   vcc-supply:
     description: regulator that provides power to the sensor
-    maxItems: 1
 
   plantower,set-gpios:
     description: GPIO connected to the SET line

Documentation/devicetree/bindings/iio/pressure/bmp085.yaml +0 -2

index c6721a7e8938..519137e5c170 100644
@@ -28,12 +28,10 @@ properties:
   vddd-supply:
     description:
       digital voltage regulator (see regulator/regulator.txt)
-    maxItems: 1
 
   vdda-supply:
     description:
       analog voltage regulator (see regulator/regulator.txt)
-    maxItems: 1
 
   reset-gpios:
     description:

Documentation/devicetree/bindings/phy/amlogic,meson-g12a-usb2-phy.yaml +0 -1

index 51254b4e65dd..57d8603076bd 100644
@@ -36,7 +36,6 @@ properties:
     const: 0
 
   phy-supply:
-     maxItems: 1
      description:
        Phandle to a regulator that provides power to the PHY. This
        regulator will be managed during the PHY power on/off sequence.

Documentation/devicetree/bindings/regulator/fixed-regulator.yaml +0 -1

index a78150c47aa2..e56d97b233f4 100644
@@ -64,7 +64,6 @@ properties:
 
   vin-supply:
     description: Input supply phandle.
-    $ref: /schemas/types.yaml#/definitions/phandle
 
 required:
   - compatible

Regulator '*-supply' properties are always a single phandle, so 'maxItems: 1' or a $ref is not necessary. All that's needed is either 'true' or an optional 'description'. Following this clean-up, the meta-schema will enforce this pattern.