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-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>;
- };
- };