Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

19 files changed, 1091 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/iio/dac/ad5592r.txt b/Documentation/devicetree/bindings/iio/dac/ad5592r.txt
new file mode 100644
index 000000000..989f96f31
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/ad5592r.txt
@@ -0,0 +1,155 @@
+Analog Devices AD5592R/AD5593R DAC/ADC device driver
+
+Required properties for the AD5592R:
+	- compatible: Must be "adi,ad5592r"
+	- reg: SPI chip select number for the device
+	- spi-max-frequency: Max SPI frequency to use (< 30000000)
+	- spi-cpol: The AD5592R requires inverse clock polarity (CPOL) mode
+
+Required properties for the AD5593R:
+	- compatible: Must be "adi,ad5593r"
+	- reg: I2C address of the device
+
+Required properties for all supported chips:
+	- #address-cells: Should be 1.
+	- #size-cells: Should be 0.
+	- channel nodes:
+	  Each child node represents one channel and has the following
+	  Required properties:
+		* reg: Pin on which this channel is connected to.
+		* adi,mode: Mode or function of this channel.
+			    Macros specifying the valid values
+			    can be found in <dt-bindings/iio/adi,ad5592r.h>.
+
+			    The following values are currently supported:
+				* CH_MODE_UNUSED (the pin is unused)
+				* CH_MODE_ADC (the pin is ADC input)
+				* CH_MODE_DAC (the pin is DAC output)
+				* CH_MODE_DAC_AND_ADC (the pin is DAC output
+					but can be monitored by an ADC, since
+					there is no disadvantage this
+					this should be considered as the
+					preferred DAC mode)
+				* CH_MODE_GPIO (the pin is registered
+					with GPIOLIB)
+	 Optional properties:
+		* adi,off-state: State of this channel when unused or the
+				 device gets removed. Macros specifying the
+				 valid values can be found in
+				 <dt-bindings/iio/adi,ad5592r.h>.
+
+				* CH_OFFSTATE_PULLDOWN (the pin is pulled down)
+				* CH_OFFSTATE_OUT_LOW  (the pin is output low)
+				* CH_OFFSTATE_OUT_HIGH (the pin is output high)
+				* CH_OFFSTATE_OUT_TRISTATE (the pin is
+					tristated output)
+
+
+Optional properties:
+	- vref-supply: Phandle to the external reference voltage supply. This should
+	  only be set if there is an external reference voltage connected to the VREF
+	  pin. If the property is not set the internal 2.5V reference is used.
+	- reset-gpios : GPIO spec for the RESET pin. If specified, it will be
+	  asserted during driver probe.
+	- gpio-controller: Marks the device node as a GPIO controller.
+	- #gpio-cells: Should be 2. The first cell is the GPIO number and the second
+	  cell specifies GPIO flags, as defined in <dt-bindings/gpio/gpio.h>.
+
+AD5592R Example:
+
+	#include <dt-bindings/iio/adi,ad5592r.h>
+
+	vref: regulator-vref {
+		compatible = "regulator-fixed";
+		regulator-name = "vref-ad559x";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+	};
+
+	ad5592r@0 {
+		#size-cells = <0>;
+		#address-cells = <1>;
+		#gpio-cells = <2>;
+		compatible = "adi,ad5592r";
+		reg = <0>;
+
+		spi-max-frequency = <1000000>;
+		spi-cpol;
+
+		vref-supply = <&vref>; /* optional */
+		reset-gpios = <&gpio0 86 0>;  /* optional */
+		gpio-controller;
+
+		channel@0 {
+			reg = <0>;
+			adi,mode = <CH_MODE_DAC>;
+		};
+		channel@1 {
+			reg = <1>;
+			adi,mode = <CH_MODE_ADC>;
+		};
+		channel@2 {
+			reg = <2>;
+			adi,mode = <CH_MODE_DAC_AND_ADC>;
+		};
+		channel@3 {
+			reg = <3>;
+			adi,mode = <CH_MODE_DAC_AND_ADC>;
+			adi,off-state = <CH_OFFSTATE_PULLDOWN>;
+		};
+		channel@4 {
+			reg = <4>;
+			adi,mode = <CH_MODE_UNUSED>;
+			adi,off-state = <CH_OFFSTATE_PULLDOWN>;
+		};
+		channel@5 {
+			reg = <5>;
+			adi,mode = <CH_MODE_GPIO>;
+			adi,off-state = <CH_OFFSTATE_PULLDOWN>;
+		};
+		channel@6 {
+			reg = <6>;
+			adi,mode = <CH_MODE_GPIO>;
+			adi,off-state = <CH_OFFSTATE_PULLDOWN>;
+		};
+		channel@7 {
+			reg = <7>;
+			adi,mode = <CH_MODE_GPIO>;
+			adi,off-state = <CH_OFFSTATE_PULLDOWN>;
+		};
+	};
+
+AD5593R Example:
+
+	#include <dt-bindings/iio/adi,ad5592r.h>
+
+	ad5593r@10 {
+		#size-cells = <0>;
+		#address-cells = <1>;
+		#gpio-cells = <2>;
+		compatible = "adi,ad5593r";
+		reg = <0x10>;
+		gpio-controller;
+
+		channel@0 {
+			reg = <0>;
+			adi,mode = <CH_MODE_DAC>;
+			adi,off-state = <CH_OFFSTATE_PULLDOWN>;
+		};
+		channel@1 {
+			reg = <1>;
+			adi,mode = <CH_MODE_ADC>;
+			adi,off-state = <CH_OFFSTATE_PULLDOWN>;
+		};
+		channel@2 {
+			reg = <2>;
+			adi,mode = <CH_MODE_DAC_AND_ADC>;
+			adi,off-state = <CH_OFFSTATE_PULLDOWN>;
+		};
+		channel@6 {
+			reg = <6>;
+			adi,mode = <CH_MODE_GPIO>;
+			adi,off-state = <CH_OFFSTATE_PULLDOWN>;
+		};
+	};
diff --git a/Documentation/devicetree/bindings/iio/dac/ad5755.txt b/Documentation/devicetree/bindings/iio/dac/ad5755.txt
new file mode 100644
index 000000000..502e1e55a
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/ad5755.txt
@@ -0,0 +1,124 @@
+* Analog Devices AD5755 IIO Multi-Channel DAC Linux Driver
+
+Required properties:
+ - compatible: Has to contain one of the following:
+	adi,ad5755
+	adi,ad5755-1
+	adi,ad5757
+	adi,ad5735
+	adi,ad5737
+
+ - reg: spi chip select number for the device
+ - spi-cpha or spi-cpol: is the only modes that is supported
+
+Recommended properties:
+ - spi-max-frequency: Definition as per
+		Documentation/devicetree/bindings/spi/spi-bus.txt
+
+Optional properties:
+See include/dt-bindings/iio/ad5755.h
+ - adi,ext-dc-dc-compenstation-resistor: boolean set if the hardware have an
+					 external resistor and thereby bypasses
+					 the internal compensation resistor.
+ - adi,dc-dc-phase:
+	Valid values for DC DC Phase control is:
+	0: All dc-to-dc converters clock on the same edge.
+	1: Channel A and Channel B clock on the same edge,
+	   Channel C and Channel D clock on opposite edges.
+	2: Channel A and Channel C clock on the same edge,
+	   Channel B and Channel D clock on opposite edges.
+	3: Channel A, Channel B, Channel C, and Channel D
+	   clock 90 degrees out of phase from each other.
+ - adi,dc-dc-freq-hz:
+	Valid values for DC DC frequency is [Hz]:
+	250000
+	410000
+	650000
+ - adi,dc-dc-max-microvolt:
+	Valid values for the maximum allowed Vboost voltage supplied by
+	the dc-to-dc converter is:
+	23000000
+	24500000
+	27000000
+	29500000
+
+Optional for every channel:
+ - adi,mode:
+	Valid values for DAC modes is:
+	0: 0 V to 5 V voltage range.
+	1: 0 V to 10 V voltage range.
+	2: Plus minus 5 V voltage range.
+	3: Plus minus 10 V voltage range.
+	4: 4 mA to 20 mA current range.
+	5: 0 mA to 20 mA current range.
+	6: 0 mA to 24 mA current range.
+ - adi,ext-current-sense-resistor: boolean set if the hardware a external
+				   current sense resistor.
+ - adi,enable-voltage-overrange: boolean enable voltage overrange
+ - adi,slew: Array of slewrate settings should contain 3 fields:
+	1: Should be either 0 or 1 in order to enable or disable slewrate.
+	2: Slew rate settings:
+		Valid values for the slew rate update frequency:
+		64000
+		32000
+		16000
+		8000
+		4000
+		2000
+		1000
+		500
+		250
+		125
+		64
+		32
+		16
+		8
+		4
+		0
+	3: Slew step size:
+		Valid values for the step size LSBs:
+		1
+		2
+		4
+		16
+		32
+		64
+		128
+		256
+
+Example:
+dac@0 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	compatible = "adi,ad5755";
+	reg = <0>;
+	spi-max-frequency = <1000000>;
+	spi-cpha;
+	adi,dc-dc-phase = <0>;
+	adi,dc-dc-freq-hz = <410000>;
+	adi,dc-dc-max-microvolt = <23000000>;
+	channel@0 {
+		reg = <0>;
+		adi,mode = <4>;
+		adi,ext-current-sense-resistor;
+		adi,slew = <0 64000 1>;
+	};
+	channel@1 {
+		reg = <1>;
+		adi,mode = <4>;
+		adi,ext-current-sense-resistor;
+		adi,slew = <0 64000 1>;
+	};
+	channel@2 {
+		reg = <2>;
+		adi,mode = <4>;
+		adi,ext-current-sense-resistor;
+		adi,slew = <0 64000 1>;
+	};
+	channel@3 {
+		reg = <3>;
+		adi,mode = <4>;
+		adi,ext-current-sense-resistor;
+		adi,slew = <0 64000 1>;
+	};
+};
diff --git a/Documentation/devicetree/bindings/iio/dac/ad5758.txt b/Documentation/devicetree/bindings/iio/dac/ad5758.txt
new file mode 100644
index 000000000..2f607f41f
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/ad5758.txt
@@ -0,0 +1,83 @@
+Analog Devices AD5758 DAC device driver
+
+Required properties for the AD5758:
+	- compatible: Must be "adi,ad5758"
+	- reg: SPI chip select number for the device
+	- spi-max-frequency: Max SPI frequency to use (< 50000000)
+	- spi-cpha: is the only mode that is supported
+
+Required properties:
+
+ - adi,dc-dc-mode: Mode of operation of the dc-to-dc converter
+		   Dynamic Power Control (DPC)
+		   In this mode, the AD5758 circuitry senses the output
+		   voltage and dynamically regulates the supply voltage,
+		   VDPC+, to meet compliance requirements plus an optimized
+		   headroom voltage for the output buffer.
+
+		   Programmable Power Control (PPC)
+		   In this mode, the VDPC+ voltage is user-programmable to
+		   a fixed level that needs to accommodate the maximum output
+		   load required.
+
+		   The output of the DAC core is either converted to a
+		   current or voltage output at the VIOUT pin. Only one mode
+		   can be enabled at any one time.
+
+		   The following values are currently supported:
+			* 1: DPC current mode
+			* 2: DPC voltage mode
+			* 3: PPC current mode
+
+ Depending on the selected output mode (voltage or current) one of the
+ two properties must
+ be present:
+
+ - adi,range-microvolt: Voltage output range
+		The array of voltage output ranges must contain two fields:
+		* <0 5000000>: 0 V to 5 V voltage range
+		* <0 10000000>: 0 V to 10 V voltage range
+		* <(-5000000) 5000000>: ±5 V voltage range
+		* <(-10000000) 10000000>: ±10 V voltage range
+ - adi,range-microamp: Current output range
+		The array of current output ranges must contain two fields:
+		* <0 20000>: 0 mA to 20 mA current range
+		* <0 24000>: 0 mA to 24 mA current range
+		* <4 24000>: 4 mA to 20 mA current range
+		* <(-20000) 20000>: ±20 mA current range
+		* <(-24000) 24000>: ±24 mA current range
+		* <(-1000) 22000>: −1 mA to +22 mA current range
+
+Optional properties:
+
+ - reset-gpios : GPIO spec for the RESET pin. If specified, it will be
+		 asserted during driver probe.
+
+ - adi,dc-dc-ilim-microamp: The dc-to-dc converter current limit
+		   The following values are currently supported [uA]:
+			* 150000
+			* 200000
+			* 250000
+			* 300000
+			* 350000
+			* 400000
+
+ - adi,slew-time-us: The time it takes for the output to reach the
+ full scale [uS]
+		     The supported range is between 133us up to 1023984375us
+
+AD5758 Example:
+
+	dac@0 {
+		compatible = "adi,ad5758";
+		reg = <0>;
+		spi-max-frequency = <1000000>;
+		spi-cpha;
+
+		reset-gpios = <&gpio 22 0>;
+
+		adi,dc-dc-mode = <2>;
+		adi,range-microvolt = <0 10000000>;
+		adi,dc-dc-ilim-microamp = <200000>;
+		adi,slew-time-us = <125000>;
+	};
diff --git a/Documentation/devicetree/bindings/iio/dac/ad7303.txt b/Documentation/devicetree/bindings/iio/dac/ad7303.txt
new file mode 100644
index 000000000..914610f05
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/ad7303.txt
@@ -0,0 +1,23 @@
+Analog Devices AD7303 DAC device driver
+
+Required properties:
+	- compatible: Must be "adi,ad7303"
+	- reg: SPI chip select number for the device
+	- spi-max-frequency: Max SPI frequency to use (< 30000000)
+	- Vdd-supply: Phandle to the Vdd power supply
+
+Optional properties:
+	- REF-supply: Phandle to the external reference voltage supply. This should
+	  only be set if there is an external reference voltage connected to the REF
+	  pin. If the property is not set Vdd/2 is used as the reference voltage.
+
+Example:
+
+		ad7303@4 {
+			compatible = "adi,ad7303";
+			reg = <4>;
+			spi-max-frequency = <10000000>;
+			Vdd-supply = <&vdd_supply>;
+			adi,use-external-reference;
+			REF-supply = <&vref_supply>;
+		};
diff --git a/Documentation/devicetree/bindings/iio/dac/adi,ad5770r.yaml b/Documentation/devicetree/bindings/iio/dac/adi,ad5770r.yaml
new file mode 100644
index 000000000..fb2c48fc7
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/adi,ad5770r.yaml
@@ -0,0 +1,190 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2020 Analog Devices Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/dac/adi,ad5770r.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD5770R DAC device driver
+
+maintainers:
+  - Mircea Caprioru <mircea.caprioru@analog.com>
+
+description: |
+  Bindings for the Analog Devices AD5770R current DAC device. Datasheet can be
+  found here:
+    https://www.analog.com/media/en/technical-documentation/data-sheets/AD5770R.pdf
+
+properties:
+  compatible:
+    enum:
+      - adi,ad5770r
+
+  reg:
+    maxItems: 1
+
+  avdd-supply:
+    description:
+      AVdd voltage supply. Represents two different supplies in the datasheet
+      that are in fact the same.
+
+  iovdd-supply:
+    description:
+      Voltage supply for the chip interface.
+
+  vref-supply:
+    description: Specify the voltage of the external reference used.
+      Available reference options are 1.25 V or 2.5 V. If no
+      external reference declared then the device will use the
+      internal reference of 1.25 V.
+
+  adi,external-resistor:
+    description: Specify if an external 2.5k ohm resistor is used. If not
+      specified the device will use an internal 2.5k ohm resistor.
+      The precision resistor is used for reference current generation.
+    type: boolean
+
+  reset-gpios:
+    description: GPIO spec for the RESET pin. If specified, it will be
+      asserted during driver probe.
+    maxItems: 1
+
+  spi-max-frequency: true
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+  channel@0:
+    description: Represents an external channel which are
+      connected to the DAC. Channel 0 can act both as a current
+      source and sink.
+    type: object
+
+    properties:
+      reg:
+        description: This represents the channel number.
+        const: 0
+
+      adi,range-microamp:
+        description: Output range of the channel.
+        oneOf:
+          - items:
+              - const: 0
+              - const: 300000
+          - items:
+              - const: -60000
+              - const: 0
+          - items:
+              - const: -60000
+              - const: 300000
+
+  channel@1:
+    description: Represents an external channel which are
+      connected to the DAC.
+    type: object
+
+    properties:
+      reg:
+        description: This represents the channel number.
+        const: 1
+
+      adi,range-microamp:
+        description: Output range of the channel.
+        items:
+          - const: 0
+          - enum: [140000, 250000]
+
+  channel@2:
+    description: Represents an external channel which are
+      connected to the DAC.
+    type: object
+
+    properties:
+      reg:
+        description: This represents the channel number.
+        const: 2
+
+      adi,range-microamp:
+        description: Output range of the channel.
+        items:
+          - const: 0
+          - enum: [55000, 150000]
+
+patternProperties:
+  "^channel@([3-5])$":
+    type: object
+    description: Represents the external channels which are connected to the DAC.
+    properties:
+      reg:
+        description: This represents the channel number.
+        minimum: 3
+        maximum: 5
+
+      adi,range-microamp:
+        description: Output range of the channel.
+        items:
+          - const: 0
+          - enum: [45000, 100000]
+
+required:
+  - reg
+  - channel@0
+  - channel@1
+  - channel@2
+  - channel@3
+  - channel@4
+  - channel@5
+
+additionalProperties: false
+
+examples:
+  - |
+        spi {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                ad5770r@0 {
+                        compatible = "adi,ad5770r";
+                        reg = <0>;
+                        spi-max-frequency = <1000000>;
+                        vref-supply = <&vref>;
+                        adi,external-resistor;
+                        reset-gpios = <&gpio 22 0>;
+                        #address-cells = <1>;
+                        #size-cells = <0>;
+
+                        channel@0 {
+                                reg = <0>;
+                                adi,range-microamp = <0 300000>;
+                        };
+
+                        channel@1 {
+                                reg = <1>;
+                                adi,range-microamp = <0 140000>;
+                        };
+
+                        channel@2 {
+                                reg = <2>;
+                                adi,range-microamp = <0 55000>;
+                        };
+
+                        channel@3 {
+                                reg = <3>;
+                                adi,range-microamp = <0 45000>;
+                        };
+
+                        channel@4 {
+                                reg = <4>;
+                                adi,range-microamp = <0 45000>;
+                        };
+
+                        channel@5 {
+                                reg = <5>;
+                                adi,range-microamp = <0 45000>;
+                        };
+                };
+        };
+...
diff --git a/Documentation/devicetree/bindings/iio/dac/dpot-dac.txt b/Documentation/devicetree/bindings/iio/dac/dpot-dac.txt
new file mode 100644
index 000000000..fdf47a01b
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/dpot-dac.txt
@@ -0,0 +1,41 @@
+Bindings for DAC emulation using a digital potentiometer
+
+It is assumed that the dpot is used as a voltage divider between the
+current dpot wiper setting and the maximum resistance of the dpot. The
+divided voltage is provided by a vref regulator.
+
+                  .------.
+   .-----------.  |      |
+   | vref      |--'    .---.
+   | regulator |--.    |   |
+   '-----------'  |    | d |
+                  |    | p |
+                  |    | o |  wiper
+                  |    | t |<---------+
+                  |    |   |
+                  |    '---'       dac output voltage
+                  |      |
+                  '------+------------+
+
+Required properties:
+- compatible: Should be "dpot-dac"
+- vref-supply: The regulator supplying the voltage divider.
+- io-channels: Channel node of the dpot to be used for the voltage division.
+- io-channel-names: Should be "dpot".
+
+Example:
+
+	&i2c {
+		dpot: mcp4651-503@28 {
+			compatible = "microchip,mcp4651-503";
+			reg = <0x28>;
+			#io-channel-cells = <1>;
+		};
+	};
+
+	dac {
+		compatible = "dpot-dac";
+		vref-supply = <&reg_3v3>;
+		io-channels = <&dpot 0>;
+		io-channel-names = "dpot";
+	};
diff --git a/Documentation/devicetree/bindings/iio/dac/ds4424.txt b/Documentation/devicetree/bindings/iio/dac/ds4424.txt
new file mode 100644
index 000000000..eaebbf8da
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/ds4424.txt
@@ -0,0 +1,20 @@
+Maxim Integrated DS4422/DS4424 7-bit Sink/Source Current DAC Device Driver
+
+Datasheet publicly available at:
+https://datasheets.maximintegrated.com/en/ds/DS4422-DS4424.pdf
+
+Required properties:
+	- compatible: Should be one of
+		maxim,ds4422
+		maxim,ds4424
+	- reg: Should contain the DAC I2C address
+
+Optional properties:
+	- vcc-supply: Power supply is optional. If not defined, driver will ignore it.
+
+Example:
+	ds4224@10 {
+		compatible = "maxim,ds4424";
+		reg = <0x10>; /* When A0, A1 pins are ground */
+		vcc-supply = <&vcc_3v3>;
+	};
diff --git a/Documentation/devicetree/bindings/iio/dac/lltc,ltc1660.yaml b/Documentation/devicetree/bindings/iio/dac/lltc,ltc1660.yaml
new file mode 100644
index 000000000..e51a585bd
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/lltc,ltc1660.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+# Copyright 2019 Marcus Folkesson <marcus.folkesson@gmail.com>
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/iio/dac/lltc,ltc1660.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Linear Technology Micropower octal 8-Bit and 10-Bit DACs
+
+maintainers:
+  - Marcus Folkesson <marcus.folkesson@gmail.com>
+
+description: |
+  Bindings for the Linear Technology Micropower octal 8-Bit and 10-Bit DAC.
+  Datasheet can be found here: https://www.analog.com/media/en/technical-documentation/data-sheets/166560fa.pdf
+
+properties:
+  compatible:
+    enum:
+      - lltc,ltc1660
+      - lltc,ltc1665
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 5000000
+
+  vref-supply:
+    description: Phandle to the external reference voltage supply.
+
+required:
+  - compatible
+  - reg
+  - vref-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    spi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+  
+      dac@0 {
+        compatible = "lltc,ltc1660";
+        reg = <0>;
+        spi-max-frequency = <5000000>;
+        vref-supply = <&vref_reg>;
+      };
+    };
diff --git a/Documentation/devicetree/bindings/iio/dac/lltc,ltc2632.yaml b/Documentation/devicetree/bindings/iio/dac/lltc,ltc2632.yaml
new file mode 100644
index 000000000..edf804d0a
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/lltc,ltc2632.yaml
@@ -0,0 +1,77 @@
+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/iio/dac/lltc,ltc2632.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Linear Technology LTC263x 12-/10-/8-Bit Rail-to-Rail DAC
+
+maintainers:
+  - Michael Hennerich <michael.hennerich@analog.com>
+
+description: |
+  Bindings for the Linear Technology LTC2632/2634/2636 DAC
+  Datasheet can be found here: https://www.analog.com/media/en/technical-documentation/data-sheets/LTC263[246].pdf
+
+properties:
+  compatible:
+    enum:
+      - lltc,ltc2632-l12
+      - lltc,ltc2632-l10
+      - lltc,ltc2632-l8
+      - lltc,ltc2632-h12
+      - lltc,ltc2632-h10
+      - lltc,ltc2632-h8
+      - lltc,ltc2634-l12
+      - lltc,ltc2634-l10
+      - lltc,ltc2634-l8
+      - lltc,ltc2634-h12
+      - lltc,ltc2634-h10
+      - lltc,ltc2634-h8
+      - lltc,ltc2636-l12
+      - lltc,ltc2636-l10
+      - lltc,ltc2636-l8
+      - lltc,ltc2636-h12
+      - lltc,ltc2636-h10
+      - lltc,ltc2636-h8
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 2000000
+
+  vref-supply:
+    description:
+      Phandle to the external reference voltage supply. This should
+      only be set if there is an external reference voltage connected to the VREF
+      pin. If the property is not set the internal reference is used.
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    vref: regulator-vref {
+        compatible = "regulator-fixed";
+        regulator-name = "vref-ltc2632";
+        regulator-min-microvolt = <1250000>;
+        regulator-max-microvolt = <1250000>;
+        regulator-always-on;
+    };
+
+    spi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      dac@0 {
+        compatible = "lltc,ltc2632";
+        reg = <0>;    /* CS0 */
+        spi-max-frequency = <1000000>;
+        vref-supply = <&vref>;
+      };
+    };
+...
diff --git a/Documentation/devicetree/bindings/iio/dac/lpc1850-dac.txt b/Documentation/devicetree/bindings/iio/dac/lpc1850-dac.txt
new file mode 100644
index 000000000..42db783c4
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/lpc1850-dac.txt
@@ -0,0 +1,19 @@
+NXP LPC1850 DAC bindings
+
+Required properties:
+- compatible: Should be "nxp,lpc1850-dac"
+- reg: Offset and length of the register set for the ADC device
+- interrupts: The interrupt number for the ADC device
+- clocks: The root clock of the ADC controller
+- vref-supply: The regulator supply ADC reference voltage
+- resets: phandle to reset controller and line specifier
+
+Example:
+dac: dac@400e1000 {
+	compatible = "nxp,lpc1850-dac";
+	reg = <0x400e1000 0x1000>;
+	interrupts = <0>;
+	clocks = <&ccu1 CLK_APB3_DAC>;
+	vref-supply = <&reg_vdda>;
+	resets = <&rgu 42>;
+};
diff --git a/Documentation/devicetree/bindings/iio/dac/max5821.txt b/Documentation/devicetree/bindings/iio/dac/max5821.txt
new file mode 100644
index 000000000..54276ce8c
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/max5821.txt
@@ -0,0 +1,14 @@
+Maxim max5821 DAC device driver
+
+Required properties:
+	- compatible: Must be "maxim,max5821"
+	- reg: Should contain the DAC I2C address
+	- vref-supply: Phandle to the vref power supply
+
+Example:
+
+	max5821@38 {
+		compatible = "maxim,max5821";
+		reg = <0x38>;
+		vref-supply = <&reg_max5821>;
+	};
diff --git a/Documentation/devicetree/bindings/iio/dac/mcp4725.txt b/Documentation/devicetree/bindings/iio/dac/mcp4725.txt
new file mode 100644
index 000000000..1bc6c093f
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/mcp4725.txt
@@ -0,0 +1,35 @@
+Microchip mcp4725 and mcp4726 DAC device driver
+
+Required properties:
+	- compatible: Must be "microchip,mcp4725" or "microchip,mcp4726"
+	- reg: Should contain the DAC I2C address
+	- vdd-supply: Phandle to the Vdd power supply. This supply is used as a
+	  voltage reference on mcp4725. It is used as a voltage reference on
+	  mcp4726 if there is no vref-supply specified.
+
+Optional properties (valid only for mcp4726):
+	- vref-supply: Optional phandle to the Vref power supply. Vref pin is
+	  used as a voltage reference when this supply is specified.
+	- microchip,vref-buffered: Boolean to enable buffering of the external
+	  Vref pin. This boolean is not valid without the vref-supply. Quoting
+	  the datasheet: This is offered in cases where the reference voltage
+	  does not have the current capability not to drop its voltage when
+	  connected to the internal resistor ladder circuit.
+
+Examples:
+
+	/* simple mcp4725 */
+	mcp4725@60 {
+		compatible = "microchip,mcp4725";
+		reg = <0x60>;
+		vdd-supply = <&vdac_vdd>;
+	};
+
+	/* mcp4726 with the buffered external reference voltage */
+	mcp4726@60 {
+		compatible = "microchip,mcp4726";
+		reg = <0x60>;
+		vdd-supply = <&vdac_vdd>;
+		vref-supply = <&vdac_vref>;
+		microchip,vref-buffered;
+	};
diff --git a/Documentation/devicetree/bindings/iio/dac/st,stm32-dac.yaml b/Documentation/devicetree/bindings/iio/dac/st,stm32-dac.yaml
new file mode 100644
index 000000000..393f70059
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/st,stm32-dac.yaml
@@ -0,0 +1,110 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/iio/dac/st,stm32-dac.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: STMicroelectronics STM32 DAC bindings
+
+description: |
+  The STM32 DAC is a 12-bit voltage output digital-to-analog converter. The DAC
+  may be configured in 8 or 12-bit mode. It has two output channels, each with
+  its own converter.
+  It has built-in noise and triangle waveform generator and supports external
+  triggers for conversions. The DAC's output buffer allows a high drive output
+  current.
+
+maintainers:
+  - Fabrice Gasnier <fabrice.gasnier@st.com>
+
+properties:
+  compatible:
+    enum:
+      - st,stm32f4-dac-core
+      - st,stm32h7-dac-core
+
+  reg:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: pclk
+
+  vref-supply:
+    description: Phandle to the vref input analog reference voltage.
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - vref-supply
+  - '#address-cells'
+  - '#size-cells'
+
+patternProperties:
+  "^dac@[1-2]+$":
+    type: object
+    description:
+      A DAC block node should contain at least one subnode, representing an
+      DAC instance/channel available on the machine.
+
+    properties:
+      compatible:
+        const: st,stm32-dac
+
+      reg:
+        description: Must be either 1 or 2, to define (single) channel in use
+        enum: [1, 2]
+
+      '#io-channel-cells':
+        const: 1
+
+    additionalProperties: false
+
+    required:
+      - compatible
+      - reg
+      - '#io-channel-cells'
+
+examples:
+  - |
+    // Example on stm32mp157c
+    #include <dt-bindings/clock/stm32mp1-clks.h>
+    dac: dac@40017000 {
+      compatible = "st,stm32h7-dac-core";
+      reg = <0x40017000 0x400>;
+      clocks = <&rcc DAC12>;
+      clock-names = "pclk";
+      vref-supply = <&vref>;
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      dac@1 {
+        compatible = "st,stm32-dac";
+        #io-channel-cells = <1>;
+        reg = <1>;
+      };
+
+      dac@2 {
+        compatible = "st,stm32-dac";
+        #io-channel-cells = <1>;
+        reg = <2>;
+      };
+    };
+
+...
diff --git a/Documentation/devicetree/bindings/iio/dac/ti,dac5571.txt b/Documentation/devicetree/bindings/iio/dac/ti,dac5571.txt
new file mode 100644
index 000000000..03af6b9a4
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/ti,dac5571.txt
@@ -0,0 +1,24 @@
+* Texas Instruments DAC5571 Family
+
+Required properties:
+ - compatible: Should contain
+    "ti,dac5571"
+    "ti,dac6571"
+    "ti,dac7571"
+    "ti,dac5574"
+    "ti,dac6574"
+    "ti,dac7574"
+    "ti,dac5573"
+    "ti,dac6573"
+    "ti,dac7573"
+ - reg: Should contain the DAC I2C address
+
+Optional properties:
+ - vref-supply: The regulator supply for DAC reference voltage
+
+Example:
+dac@0 {
+	compatible = "ti,dac5571";
+	reg = <0x4C>;
+	vref-supply = <&vdd_supply>;
+};
diff --git a/Documentation/devicetree/bindings/iio/dac/ti,dac7311.txt b/Documentation/devicetree/bindings/iio/dac/ti,dac7311.txt
new file mode 100644
index 000000000..e5a507db5
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/ti,dac7311.txt
@@ -0,0 +1,23 @@
+TI DAC7311 device tree bindings
+
+Required properties:
+- compatible: must be set to:
+	* "ti,dac7311"
+	* "ti,dac6311"
+	* "ti,dac5311"
+- reg: spi chip select number for the device
+- vref-supply: The regulator supply for ADC reference voltage
+
+Optional properties:
+- spi-max-frequency: Max SPI frequency to use
+
+Example:
+
+	spi_master {
+		dac@0 {
+			compatible = "ti,dac7311";
+			reg = <0>; /* CS0 */
+			spi-max-frequency = <1000000>;
+			vref-supply = <&vdd_supply>;
+		};
+	};
diff --git a/Documentation/devicetree/bindings/iio/dac/ti,dac7512.txt b/Documentation/devicetree/bindings/iio/dac/ti,dac7512.txt
new file mode 100644
index 000000000..1db45939d
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/ti,dac7512.txt
@@ -0,0 +1,20 @@
+TI DAC7512 DEVICETREE BINDINGS
+
+Required properties:
+
+	- "compatible"		Must be set to "ti,dac7512"
+
+Property rules described in Documentation/devicetree/bindings/spi/spi-bus.txt
+apply. In particular, "reg" and "spi-max-frequency" properties must be given.
+
+
+Example:
+
+	spi_master {
+		dac7512: dac7512@0 {
+			compatible = "ti,dac7512";
+			reg = <0>; /* CS0 */
+			spi-max-frequency = <1000000>;
+		};
+	};
+
diff --git a/Documentation/devicetree/bindings/iio/dac/ti,dac7612.txt b/Documentation/devicetree/bindings/iio/dac/ti,dac7612.txt
new file mode 100644
index 000000000..17af395b9
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/ti,dac7612.txt
@@ -0,0 +1,28 @@
+* Texas Instruments Dual, 12-Bit Serial Input Digital-to-Analog Converter
+
+The DAC7612 is a dual, 12-bit digital-to-analog converter (DAC) with guaranteed
+12-bit monotonicity performance over the industrial temperature range.
+Is is programmable through an SPI interface.
+
+The internal DACs are loaded when the LOADDACS pin is pulled down.
+
+https://www.ti.com/lit/ds/sbas106/sbas106.pdf
+
+Required Properties:
+- compatible: Should be one of:
+		"ti,dac7612"
+		"ti,dac7612u"
+		"ti,dac7612ub"
+- reg: Definition as per Documentation/devicetree/bindings/spi/spi-bus.txt
+
+Optional Properties:
+- ti,loaddacs-gpios: GPIO descriptor for the LOADDACS pin.
+- spi-*: Definition as per Documentation/devicetree/bindings/spi/spi-bus.txt
+
+Example:
+
+	dac@1 {
+		compatible = "ti,dac7612";
+		reg = <0x1>;
+		ti,loaddacs-gpios = <&msmgpio 25 GPIO_ACTIVE_LOW>;
+	};
diff --git a/Documentation/devicetree/bindings/iio/dac/ti-dac082s085.txt b/Documentation/devicetree/bindings/iio/dac/ti-dac082s085.txt
new file mode 100644
index 000000000..9cb0e10df
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/ti-dac082s085.txt
@@ -0,0 +1,34 @@
+Texas Instruments 8/10/12-bit 2/4-channel DAC driver
+
+Required properties:
+ - compatible:		Must be one of:
+			"ti,dac082s085"
+			"ti,dac102s085"
+			"ti,dac122s085"
+			"ti,dac084s085"
+			"ti,dac104s085"
+			"ti,dac124s085"
+ - reg: 		Chip select number.
+ - spi-cpha, spi-cpol:	SPI mode (0,1) or (1,0) must be used, so specify
+			either spi-cpha or spi-cpol (but not both).
+ - vref-supply: 	Phandle to the external reference voltage supply.
+
+For other required and optional properties of SPI slave nodes please refer to
+../../spi/spi-bus.txt.
+
+Example:
+	vref_2v5_reg: regulator-vref {
+		compatible = "regulator-fixed";
+		regulator-name = "2v5";
+		regulator-min-microvolt = <2500000>;
+		regulator-max-microvolt = <2500000>;
+		regulator-always-on;
+	};
+
+	dac@0 {
+		compatible = "ti,dac082s085";
+		reg = <0>;
+		spi-max-frequency = <40000000>;
+		spi-cpol;
+		vref-supply = <&vref_2v5_reg>;
+	};
diff --git a/Documentation/devicetree/bindings/iio/dac/vf610-dac.txt b/Documentation/devicetree/bindings/iio/dac/vf610-dac.txt
new file mode 100644
index 000000000..20c6c7ae9
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/vf610-dac.txt
@@ -0,0 +1,20 @@
+Freescale vf610 Digital to Analog Converter bindings
+
+The devicetree bindings are for the new DAC driver written for
+vf610 SoCs from Freescale.
+
+Required properties:
+- compatible: Should contain "fsl,vf610-dac"
+- reg: Offset and length of the register set for the device
+- interrupts: Should contain the interrupt for the device
+- clocks: The clock is needed by the DAC controller
+- clock-names: Must contain "dac" matching entry in the clocks property.
+
+Example:
+dac0: dac@400cc000 {
+	compatible = "fsl,vf610-dac";
+	reg = <0x400cc000 0x1000>;
+	interrupts = <55 IRQ_TYPE_LEVEL_HIGH>;
+	clock-names = "dac";
+	clocks = <&clks VF610_CLK_DAC0>;
+};