dt-bindings: iio: adc: Migrate AD7606 documentation to yaml

The documentation for ad7606 was migrated to yaml.
Signed-off-by: Beniamin Bia <beniamin.bia@analog.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Documentation/devicetree/bindings/iio/adc/adi,ad7606.txt

-Analog Devices AD7606 Simultaneous Sampling ADC
-
-Required properties for the AD7606:
-
-- compatible: Must be one of
-	* "adi,ad7605-4"
-	* "adi,ad7606-8"
-	* "adi,ad7606-6"
-	* "adi,ad7606-4"
-	* "adi,ad7616"
-- reg: SPI chip select number for the device
-- spi-max-frequency: Max SPI frequency to use
-	see: Documentation/devicetree/bindings/spi/spi-bus.txt
-- spi-cpha: See Documentation/devicetree/bindings/spi/spi-bus.txt
-- avcc-supply: phandle to the Avcc power supply
-- interrupts: IRQ line for the ADC
-	see: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
-- adi,conversion-start-gpios: must be the device tree identifier of the CONVST pin.
-		  This logic input is used to initiate conversions on the analog
-		  input channels. As the line is active high, it should be marked
-		  GPIO_ACTIVE_HIGH.
-
-Optional properties:
-
-- reset-gpios: must be the device tree identifier of the RESET pin. If specified,
-	       it will be asserted during driver probe. As the line is active high,
-	       it should be marked GPIO_ACTIVE_HIGH.
-- standby-gpios: must be the device tree identifier of the STBY pin. This pin is used
-		to place the AD7606 into one of two power-down modes, Standby mode or
-		Shutdown mode. As the line is active low, it should be marked
-		GPIO_ACTIVE_LOW.
-- adi,first-data-gpios: must be the device tree identifier of the FRSTDATA pin.
-		    The FRSTDATA output indicates when the first channel, V1, is
-		    being read back on either the parallel, byte or serial interface.
-		    As the line is active high, it should be marked GPIO_ACTIVE_HIGH.
-- adi,range-gpios: must be the device tree identifier of the RANGE pin. The polarity on
-	      this pin determines the input range of the analog input channels. If
-	      this pin is tied to a logic high, the analog input range is ±10V for
-	      all channels. If this pin is tied to a logic low, the analog input range
-	      is ±5V for all channels. As the line is active high, it should be marked
-	      GPIO_ACTIVE_HIGH.
-- adi,oversampling-ratio-gpios: must be the device tree identifier of the over-sampling
-				mode pins. As the line is active high, it should be marked
-				GPIO_ACTIVE_HIGH.
-
-Example:
-
-	adc@0 {
-		compatible = "adi,ad7606-8";
-		reg = <0>;
-		spi-max-frequency = <1000000>;
-		spi-cpol;
-
-		avcc-supply = <&adc_vref>;
-
-		interrupts = <25 IRQ_TYPE_EDGE_FALLING>;
-		interrupt-parent = <&gpio>;
-
-		adi,conversion-start-gpios = <&gpio 17 GPIO_ACTIVE_HIGH>;
-		reset-gpios = <&gpio 27 GPIO_ACTIVE_HIGH>;
-		adi,first-data-gpios = <&gpio 22 GPIO_ACTIVE_HIGH>;
-		adi,oversampling-ratio-gpios = <&gpio 18 GPIO_ACTIVE_HIGH
-						&gpio 23 GPIO_ACTIVE_HIGH
-						&gpio 26 GPIO_ACTIVE_HIGH>;
-		standby-gpios = <&gpio 24 GPIO_ACTIVE_LOW>;
-	};

Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml

+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/adi,ad7606.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD7606 Simultaneous Sampling ADC
+
+maintainers:
+  - Beniamin Bia <beniamin.bia@analog.com>
+  - Stefan Popa <stefan.popa@analog.com>
+
+description: |
+  Analog Devices AD7606 Simultaneous Sampling ADC
+  https://www.analog.com/media/en/technical-documentation/data-sheets/ad7606_7606-6_7606-4.pdf
+  https://www.analog.com/media/en/technical-documentation/data-sheets/AD7616.pdf
+
+properties:
+  compatible:
+    enum:
+      - adi,ad7605-4
+      - adi,ad7606-8
+      - adi,ad7606-6
+      - adi,ad7606-4
+      - adi,ad7616
+
+  reg:
+    maxItems: 1
+
+  spi-cpha: true
+
+  avcc-supply:
+    description:
+      Phandle to the Avcc power supply
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  adi,conversion-start-gpios:
+    description:
+      Must be the device tree identifier of the CONVST pin.
+      This logic input is used to initiate conversions on the analog
+      input channels. As the line is active high, it should be marked
+      GPIO_ACTIVE_HIGH.
+    maxItems: 1
+
+  reset-gpios:
+    description:
+      Must be the device tree identifier of the RESET pin. If specified,
+      it will be asserted during driver probe. As the line is active high,
+      it should be marked GPIO_ACTIVE_HIGH.
+    maxItems: 1
+
+  standby-gpios:
+    description:
+       Must be the device tree identifier of the STBY pin. This pin is used
+       to place the AD7606 into one of two power-down modes, Standby mode or
+       Shutdown mode. As the line is active low, it should be marked
+       GPIO_ACTIVE_LOW.
+    maxItems: 1
+
+  adi,first-data-gpios:
+    description:
+      Must be the device tree identifier of the FRSTDATA pin.
+      The FRSTDATA output indicates when the first channel, V1, is
+      being read back on either the parallel, byte or serial interface.
+      As the line is active high, it should be marked GPIO_ACTIVE_HIGH.
+    maxItems: 1
+
+  adi,range-gpios:
+    description:
+      Must be the device tree identifier of the RANGE pin. The polarity on
+      this pin determines the input range of the analog input channels. If
+      this pin is tied to a logic high, the analog input range is ±10V for
+      all channels. If this pin is tied to a logic low, the analog input range
+      is ±5V for all channels. As the line is active high, it should be marked
+      GPIO_ACTIVE_HIGH.
+    maxItems: 1
+
+  adi,oversampling-ratio-gpios:
+    description:
+      Must be the device tree identifier of the over-sampling
+      mode pins. As the line is active high, it should be marked
+      GPIO_ACTIVE_HIGH.
+    maxItems: 1
+
+  adi,sw-mode:
+    description:
+      Software mode of operation, so far available only for ad7616.
+      It is enabled when all three oversampling mode pins are connected to
+      high level. The device is configured by the corresponding registers. If the
+      adi,oversampling-ratio-gpios property is defined, then the driver will set the
+      oversampling gpios to high. Otherwise, it is assumed that the pins are hardwired
+      to VDD.
+    type: boolean
+
+required:
+  - compatible
+  - reg
+  - spi-cpha
+  - avcc-supply
+  - interrupts
+  - adi,conversion-start-gpios
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    spi0 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        adc@0 {
+                compatible = "adi,ad7606-8";
+                reg = <0>;
+                spi-max-frequency = <1000000>;
+                spi-cpol;
+                spi-cpha;
+
+                avcc-supply = <&adc_vref>;
+
+                interrupts = <25 IRQ_TYPE_EDGE_FALLING>;
+                interrupt-parent = <&gpio>;
+
+                adi,conversion-start-gpios = <&gpio 17 GPIO_ACTIVE_HIGH>;
+                reset-gpios = <&gpio 27 GPIO_ACTIVE_HIGH>;
+                adi,first-data-gpios = <&gpio 22 GPIO_ACTIVE_HIGH>;
+                adi,oversampling-ratio-gpios = <&gpio 18 GPIO_ACTIVE_HIGH
+                                                &gpio 23 GPIO_ACTIVE_HIGH
+                                                &gpio 26 GPIO_ACTIVE_HIGH>;
+                standby-gpios = <&gpio 24 GPIO_ACTIVE_LOW>;
+                adi,sw-mode;
+        };
+    };
+...

MAINTAINERS

@@ -908,7 +908,7 @@ L:	linux-iio@vger.kernel.org
 W:	http://ez.analog.com/community/linux-device-drivers
 S:	Supported
 F:	drivers/iio/adc/ad7606.c
-F:	Documentation/devicetree/bindings/iio/adc/adi,ad7606.txt
+F:	Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml
 
 ANALOG DEVICES INC AD7768-1 DRIVER
 M:	Stefan Popa <stefan.popa@analog.com>