156 lines
4.1 KiB
Plaintext
Executable file
156 lines
4.1 KiB
Plaintext
Executable file
Analog Devices AD5592R/AD5593R DAC/ADC device driver
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Required properties for the AD5592R:
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- compatible: Must be "adi,ad5592r"
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- reg: SPI chip select number for the device
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- spi-max-frequency: Max SPI frequency to use (< 30000000)
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- spi-cpol: The AD5592R requires inverse clock polarity (CPOL) mode
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Required properties for the AD5593R:
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- compatible: Must be "adi,ad5593r"
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- reg: I2C address of the device
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Required properties for all supported chips:
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- #address-cells: Should be 1.
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- #size-cells: Should be 0.
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- channel nodes:
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Each child node represents one channel and has the following
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Required properties:
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* reg: Pin on which this channel is connected to.
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* adi,mode: Mode or function of this channel.
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Macros specifying the valid values
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can be found in <dt-bindings/iio/adi,ad5592r.h>.
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The following values are currently supported:
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* CH_MODE_UNUSED (the pin is unused)
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* CH_MODE_ADC (the pin is ADC input)
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* CH_MODE_DAC (the pin is DAC output)
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* CH_MODE_DAC_AND_ADC (the pin is DAC output
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but can be monitored by an ADC, since
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there is no disadvantage this
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this should be considered as the
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preferred DAC mode)
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* CH_MODE_GPIO (the pin is registered
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with GPIOLIB)
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Optional properties:
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* adi,off-state: State of this channel when unused or the
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device gets removed. Macros specifying the
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valid values can be found in
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<dt-bindings/iio/adi,ad5592r.h>.
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* CH_OFFSTATE_PULLDOWN (the pin is pulled down)
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* CH_OFFSTATE_OUT_LOW (the pin is output low)
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* CH_OFFSTATE_OUT_HIGH (the pin is output high)
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* CH_OFFSTATE_OUT_TRISTATE (the pin is
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tristated output)
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Optional properties:
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- vref-supply: Phandle to the external reference voltage supply. This should
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only be set if there is an external reference voltage connected to the VREF
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pin. If the property is not set the internal 2.5V reference is used.
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- reset-gpios : GPIO spec for the RESET pin. If specified, it will be
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asserted during driver probe.
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- gpio-controller: Marks the device node as a GPIO controller.
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- #gpio-cells: Should be 2. The first cell is the GPIO number and the second
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cell specifies GPIO flags, as defined in <dt-bindings/gpio/gpio.h>.
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AD5592R Example:
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#include <dt-bindings/iio/adi,ad5592r.h>
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vref: regulator-vref {
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compatible = "regulator-fixed";
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regulator-name = "vref-ad559x";
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regulator-min-microvolt = <3300000>;
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regulator-max-microvolt = <3300000>;
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regulator-always-on;
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};
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ad5592r@0 {
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#size-cells = <0>;
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#address-cells = <1>;
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#gpio-cells = <2>;
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compatible = "adi,ad5592r";
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reg = <0>;
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spi-max-frequency = <1000000>;
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spi-cpol;
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vref-supply = <&vref>; /* optional */
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reset-gpios = <&gpio0 86 0>; /* optional */
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gpio-controller;
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channel@0 {
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reg = <0>;
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adi,mode = <CH_MODE_DAC>;
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};
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channel@1 {
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reg = <1>;
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adi,mode = <CH_MODE_ADC>;
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};
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channel@2 {
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reg = <2>;
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adi,mode = <CH_MODE_DAC_AND_ADC>;
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};
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channel@3 {
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reg = <3>;
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adi,mode = <CH_MODE_DAC_AND_ADC>;
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adi,off-state = <CH_OFFSTATE_PULLDOWN>;
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};
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channel@4 {
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reg = <4>;
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adi,mode = <CH_MODE_UNUSED>;
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adi,off-state = <CH_OFFSTATE_PULLDOWN>;
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};
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channel@5 {
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reg = <5>;
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adi,mode = <CH_MODE_GPIO>;
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adi,off-state = <CH_OFFSTATE_PULLDOWN>;
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};
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channel@6 {
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reg = <6>;
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adi,mode = <CH_MODE_GPIO>;
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adi,off-state = <CH_OFFSTATE_PULLDOWN>;
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};
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channel@7 {
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reg = <7>;
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adi,mode = <CH_MODE_GPIO>;
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adi,off-state = <CH_OFFSTATE_PULLDOWN>;
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};
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};
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AD5593R Example:
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#include <dt-bindings/iio/adi,ad5592r.h>
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ad5593r@10 {
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#size-cells = <0>;
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#address-cells = <1>;
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#gpio-cells = <2>;
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compatible = "adi,ad5593r";
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reg = <0x10>;
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gpio-controller;
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channel@0 {
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reg = <0>;
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adi,mode = <CH_MODE_DAC>;
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adi,off-state = <CH_OFFSTATE_PULLDOWN>;
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};
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channel@1 {
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reg = <1>;
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adi,mode = <CH_MODE_ADC>;
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adi,off-state = <CH_OFFSTATE_PULLDOWN>;
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};
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channel@2 {
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reg = <2>;
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adi,mode = <CH_MODE_DAC_AND_ADC>;
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adi,off-state = <CH_OFFSTATE_PULLDOWN>;
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};
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channel@6 {
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reg = <6>;
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adi,mode = <CH_MODE_GPIO>;
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adi,off-state = <CH_OFFSTATE_PULLDOWN>;
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};
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};
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