[PATCH v3 4/5] dt-bindings: iio: dac: Add adi,ltc2672.yaml

[Kim Seer Paller]

Add documentation for ltc2672.

Reported-by: Rob Herring (Arm) <robh@xxxxxxxxxx>
Closes: https://lore.kernel.org/all/171643825573.1037396.2749703571529285460.robh@xxxxxxxxxx/
Co-developed-by: Michael Hennerich <michael.hennerich@xxxxxxxxxx>
Signed-off-by: Michael Hennerich <michael.hennerich@xxxxxxxxxx>
Signed-off-by: Kim Seer Paller <kimseer.paller@xxxxxxxxxx>
---
 .../bindings/iio/dac/adi,ltc2672.yaml         | 158 ++++++++++++++++++
 MAINTAINERS                                   |   1 +
 2 files changed, 159 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/dac/adi,ltc2672.yaml

diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ltc2672.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ltc2672.yaml
new file mode 100644
index 000000000000..d143a9db7010
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/adi,ltc2672.yaml
@@ -0,0 +1,158 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/dac/adi,ltc2672.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices LTC2672 DAC
+
+maintainers:
+  - Michael Hennerich <michael.hennerich@xxxxxxxxxx>
+  - Kim Seer Paller <kimseer.paller@xxxxxxxxxx>
+
+description: |
+  Analog Devices LTC2672 5 channel, 16 bit, 300mA DAC
+  https://www.analog.com/media/en/technical-documentation/data-sheets/ltc2672.pdf
+
+properties:
+  compatible:
+    enum:
+      - adi,ltc2672
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 50000000
+
+  vcc-supply:
+    description: Analog Supply Voltage Input.
+
+  v-neg-supply:
+    description: Negative Supply Voltage Input.
+
+  vdd0-supply:
+    description: Positive Supply Voltage Input for DAC OUT0.
+
+  vdd1-supply:
+    description: Positive Supply Voltage Input for DAC OUT1.
+
+  vdd2-supply:
+    description: Positive Supply Voltage Input for DAC OUT2.
+
+  vdd3-supply:
+    description: Positive Supply Voltage Input for DAC OUT3.
+
+  vdd4-supply:
+    description: Positive Supply Voltage Input for DAC OUT4.
+
+  iovcc-supply:
+    description: Digital Input/Output Supply Voltage.
+
+  ref-supply:
+    description:
+      Reference Input/Output. The voltage at the REF pin sets the full-scale
+      range of all channels. If not provided the internal reference is used and
+      also provided on the VREF pin.
+
+  reset-gpios:
+    description:
+      Active Low Asynchronous Clear Input. A logic low at this level triggered
+      input clears the device to the default reset code and output range, which
+      is zero-scale with the outputs off. The control registers are cleared to
+      zero.
+    maxItems: 1
+
+  adi,rfsadj-ohms:
+    description:
+      If FSADJ is tied to VCC, an internal RFSADJ (20 kΩ) is selected, which
+      results in nominal output ranges. When an external resistor of 19 kΩ to
+      41 kΩ can be used instead by connecting the resistor between FSADJ and GND
+      it controls the scaling of the ranges, and the internal resistor is
+      automatically disconnected.
+    minimum: 19000
+    maximum: 41000
+    default: 20000
+
+  io-channels:
+    description:
+      ADC channel to monitor voltages and currents at the MUX pin.
+    maxItems: 1
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+patternProperties:
+  "^channel@[0-4]$":
+    type: object
+    additionalProperties: false
+
+    properties:
+      reg:
+        description: The channel number representing the DAC output channel.
+        maximum: 4
+
+      adi,toggle-mode:
+        description:
+          Set the channel as a toggle enabled channel. Toggle operation enables
+          fast switching of a DAC output between two different DAC codes without
+          any SPI transaction.
+        type: boolean
+
+      adi,output-range-microamp:
+        description: Specify the channel output full scale range.
+        enum: [3125000, 6250000, 12500000, 25000000, 50000000, 100000000,
+               200000000, 300000000]
+
+    required:
+      - reg
+      - adi,output-range-microamp
+
+required:
+  - compatible
+  - reg
+  - spi-max-frequency
+  - vcc-supply
+  - iovcc-supply
+  - v-neg-supply
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+additionalProperties: false
+
+examples:
+  - |
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        dac@0 {
+            compatible = "adi,ltc2672";
+            reg = <0>;
+            spi-max-frequency = <10000000>;
+
+            vcc-supply = <&vcc>;
+            iovcc-supply = <&vcc>;
+            ref-supply = <&vref>;
+            v-neg-supply = <&vneg>;
+
+            io-channels = <&adc 0>;
+
+            #address-cells = <1>;
+            #size-cells = <0>;
+            channel@0 {
+                    reg = <0>;
+                    adi,toggle-mode;
+                    adi,output-range-microamp = <3125000>;
+            };
+
+            channel@1 {
+                    reg = <1>;
+                    adi,output-range-microamp = <6250000>;
+            };
+        };
+    };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index c7a102d7fd6a..ac1e29e26f31 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13070,6 +13070,7 @@ L:	linux-iio@xxxxxxxxxxxxxxx
 S:	Supported
 W:	https://ez.analog.com/linux-software-drivers
 F:	Documentation/devicetree/bindings/iio/dac/adi,ltc2664.yaml
+F:	Documentation/devicetree/bindings/iio/dac/adi,ltc2672.yaml
 
 LTC2688 IIO DAC DRIVER
 M:	Nuno Sá <nuno.sa@xxxxxxxxxx>
-- 
2.34.1