58 lines
1.7 KiB
Plaintext
58 lines
1.7 KiB
Plaintext
|
Freescale i.MX25 ADC GCQ device
|
||
|
|
|
||
|
|
This is a generic conversion queue device that can convert any of the
|
||
|
|
analog inputs using the ADC unit of the i.MX25.
|
||
|
|
|
||
|
|
Required properties:
|
||
|
|
- compatible: Should be "fsl,imx25-gcq".
|
||
|
|
- reg: Should be the register range of the module.
|
||
|
|
- interrupts: Should be the interrupt number of the module.
|
||
|
|
Typically this is <1>.
|
||
|
|
- #address-cells: Should be <1> (setting for the subnodes)
|
||
|
|
- #size-cells: Should be <0> (setting for the subnodes)
|
||
|
|
|
||
|
|
Optional properties:
|
||
|
|
- vref-ext-supply: The regulator supplying the ADC reference voltage.
|
||
|
|
Required when at least one subnode uses the this reference.
|
||
|
|
- vref-xp-supply: The regulator supplying the ADC reference voltage on pin XP.
|
||
|
|
Required when at least one subnode uses this reference.
|
||
|
|
- vref-yp-supply: The regulator supplying the ADC reference voltage on pin YP.
|
||
|
|
Required when at least one subnode uses this reference.
|
||
|
|
|
||
|
|
Sub-nodes:
|
||
|
|
Optionally you can define subnodes which define the reference voltage
|
||
|
|
for the analog inputs.
|
||
|
|
|
||
|
|
Required properties for subnodes:
|
||
|
|
- reg: Should be the number of the analog input.
|
||
|
|
0: xp
|
||
|
|
1: yp
|
||
|
|
2: xn
|
||
|
|
3: yn
|
||
|
|
4: wiper
|
||
|
|
5: inaux0
|
||
|
|
6: inaux1
|
||
|
|
7: inaux2
|
||
|
|
Optional properties for subnodes:
|
||
|
|
- fsl,adc-refp: specifies the positive reference input as defined in
|
||
|
|
<dt-bindings/iio/adc/fsl-imx25-gcq.h>
|
||
|
|
- fsl,adc-refn: specifies the negative reference input as defined in
|
||
|
|
<dt-bindings/iio/adc/fsl-imx25-gcq.h>
|
||
|
|
|
||
|
|
Example:
|
||
|
|
|
||
|
|
adc: adc@50030800 {
|
||
|
|
compatible = "fsl,imx25-gcq";
|
||
|
|
reg = <0x50030800 0x60>;
|
||
|
|
interrupt-parent = <&tscadc>;
|
||
|
|
interrupts = <1>;
|
||
|
|
#address-cells = <1>;
|
||
|
|
#size-cells = <0>;
|
||
|
|
|
||
|
|
inaux@5 {
|
||
|
|
reg = <5>;
|
||
|
|
fsl,adc-refp = <MX25_ADC_REFP_INT>;
|
||
|
|
fsl,adc-refn = <MX25_ADC_REFN_NGND>;
|
||
|
|
};
|
||
|
|
};
|