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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 = <®_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 = <®_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 = <®_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>; +}; |