dt-bindings:iio:adc:atmel,sama5d2-adc: txt to yaml conversion

Whilst this binding has a lot of elements they are all fairly standard.
Hence pretty much direct txt to yaml line by line conversion.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Cc: Ludovic Desroches <ludovic.desroches@atmel.com>
Cc: Eugen Hristev <eugen.hristev@microchip.com>
Link: https://lore.kernel.org/r/20201031184854.745828-29-jic23@kernel.org

Documentation/devicetree/bindings/iio/adc/at91-sama5d2_adc.txt

-* AT91 SAMA5D2 Analog to Digital Converter (ADC)
-
-Required properties:
-  - compatible: Should be "atmel,sama5d2-adc" or "microchip,sam9x60-adc".
-  - reg: Should contain ADC registers location and length.
-  - interrupts: Should contain the IRQ line for the ADC.
-  - clocks: phandle to device clock.
-  - clock-names: Must be "adc_clk".
-  - vref-supply: Supply used as reference for conversions.
-  - vddana-supply: Supply for the adc device.
-  - atmel,min-sample-rate-hz: Minimum sampling rate, it depends on SoC.
-  - atmel,max-sample-rate-hz: Maximum sampling rate, it depends on SoC.
-  - atmel,startup-time-ms: Startup time expressed in ms, it depends on SoC.
-  - atmel,trigger-edge-type: One of possible edge types for the ADTRG hardware
-  trigger pin. When the specific edge type is detected, the conversion will
-  start. Possible values are rising, falling, or both.
-  This property uses the IRQ edge types values: IRQ_TYPE_EDGE_RISING ,
-  IRQ_TYPE_EDGE_FALLING or IRQ_TYPE_EDGE_BOTH
-
-Optional properties:
-  - dmas: Phandle to dma channel for the ADC.
-  - dma-names: Must be "rx" when dmas property is being used.
-  See ../../dma/dma.txt for details.
-  - #io-channel-cells: in case consumer drivers are attached, this must be 1.
-  See <Documentation/devicetree/bindings/iio/iio-bindings.txt> for details.
-
-Properties for consumer drivers:
-  - Consumer drivers can be connected to this producer device, as specified
-  in <Documentation/devicetree/bindings/iio/iio-bindings.txt>
-  - Channels exposed are specified in:
-  <dt-bindings/iio/adc/at91-sama5d2_adc.txt>
-
-Example:
-
-adc: adc@fc030000 {
-	compatible = "atmel,sama5d2-adc";
-	reg = <0xfc030000 0x100>;
-	interrupts = <40 IRQ_TYPE_LEVEL_HIGH 7>;
-	clocks = <&adc_clk>;
-	clock-names = "adc_clk";
-	atmel,min-sample-rate-hz = <200000>;
-	atmel,max-sample-rate-hz = <20000000>;
-	atmel,startup-time-ms = <4>;
-	vddana-supply = <&vdd_3v3_lp_reg>;
-	vref-supply = <&vdd_3v3_lp_reg>;
-	atmel,trigger-edge-type = <IRQ_TYPE_EDGE_BOTH>;
-	dmas = <&dma0 (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) | AT91_XDMAC_DT_PERID(25))>;
-	dma-names = "rx";
-	#io-channel-cells = <1>;
-}

Documentation/devicetree/bindings/iio/adc/atmel,sama5d2-adc.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/atmel,sama5d2-adc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: AT91 SAMA5D2 Analog to Digital Converter (ADC)
+
+maintainers:
+  - Ludovic Desroches <ludovic.desroches@atmel.com>
+  - Eugen Hristev <eugen.hristev@microchip.com>
+
+properties:
+  compatible:
+    enum:
+      - atmel,sama5d2-adc
+      - microchip,sam9x60-adc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: adc_clk
+
+  vref-supply: true
+  vddana-supply: true
+
+  atmel,min-sample-rate-hz:
+    description: Minimum sampling rate, it depends on SoC.
+
+  atmel,max-sample-rate-hz:
+    description: Maximum sampling rate, it depends on SoC.
+
+  atmel,startup-time-ms:
+    description: Startup time expressed in ms, it depends on SoC.
+
+  atmel,trigger-edge-type:
+    $ref: '/schemas/types.yaml#/definitions/uint32'
+    description:
+      One of possible edge types for the ADTRG hardware trigger pin.
+      When the specific edge type is detected, the conversion will
+      start. Should be one of IRQ_TYPE_EDGE_RISING, IRQ_TYPE_EDGE_FALLING
+      or IRQ_TYPE_EDGE_BOTH.
+    enum: [1, 2, 3]
+
+  dmas:
+    maxItems: 1
+
+  dma-names:
+    const: rx
+
+  "#io-channel-cells":
+    const: 1
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - vref-supply
+  - vddana-supply
+  - atmel,min-sample-rate-hz
+  - atmel,max-sample-rate-hz
+  - atmel,startup-time-ms
+  - atmel,trigger-edge-type
+
+examples:
+  - |
+    #include <dt-bindings/dma/at91.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    soc {
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        adc@fc030000 {
+            compatible = "atmel,sama5d2-adc";
+            reg = <0xfc030000 0x100>;
+            interrupts = <40 IRQ_TYPE_LEVEL_HIGH 7>;
+            clocks = <&adc_clk>;
+            clock-names = "adc_clk";
+            atmel,min-sample-rate-hz = <200000>;
+            atmel,max-sample-rate-hz = <20000000>;
+            atmel,startup-time-ms = <4>;
+            vddana-supply = <&vdd_3v3_lp_reg>;
+            vref-supply = <&vdd_3v3_lp_reg>;
+            atmel,trigger-edge-type = <IRQ_TYPE_EDGE_BOTH>;
+            dmas = <&dma0 (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) | AT91_XDMAC_DT_PERID(25))>;
+            dma-names = "rx";
+            #io-channel-cells = <1>;
+        };
+    };
+...