156 lines
4.1 KiB
Plaintext
156 lines
4.1 KiB
Plaintext
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>;
|
|
};
|
|
};
|