Add yaml devicetree description file and a header file for helping configure positive and negtive input of AD5940. Signed-off-by: Song Qiang <songqiang1304521@xxxxxxxxx> --- .../bindings/iio/adc/adi,ad5940.yaml | 240 ++++++++++++++++++ include/dt-bindings/iio/adc/adi,ad5940.h | 52 ++++ 2 files changed, 292 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad5940.yaml create mode 100644 include/dt-bindings/iio/adc/adi,ad5940.h diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad5940.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad5940.yaml new file mode 100644 index 000000000000..f7f034fdd8ec --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad5940.yaml @@ -0,0 +1,240 @@ +# SPDX-License-Identifier: GPL-2.0 +# Copyright 2019 Analog Devices Inc. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/bindings/iio/adc/adi,ad5940.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices AD5940 Device Tree Bindings + +maintainers: + - Song Qiang <songqiang1304521@xxxxxxxxx> + +description: | + Analog Devices AD5940 High Precision, Impedance, and Electrochemical Front End. + https://www.analog.com/media/en/technical-documentation/data-sheets/AD5940.pdf + +properties: + compatible: + enum: + - adi,ad5940 + + reg: + maxItems: 1 + + vref-supply: + description: + The regulator to be used to supply the reference voltage. + maxItems: 1 + + adi,interrupt-io: + description: + Output GPIO index of interrupt controller of AD5940. + maxItems: 1 + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32 + - enum: [0, 3, 6, 7] + + '#address-cells': + const: 1 + + '#size-cells': + const: 0 + +required: + - compatible + - reg + - interrupts + - adi,interrupt-io + +patternProperties: + # 'channel@0-255' + "^channel@([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])$": + type: object + description: | + Represents the external channels which are connected to the ADC. + See Documentation/devicetree/bindings/iio/adc/adc.txt. + properties: + reg: + description: + Index of this channel, must be starting from 0. + maxItems: 1 + + diff-channels: + description: + Positive input and negtive input of the ADC buffer of this channel. + Input candidates are defined in include/dt-bindings/iio/adc/adi,ad5940.h. + minItems: 2 + maxItems: 2 + items: + - description: Positive input channel + - enum: + - AD5940_ADC_INPUTP_EXCITATION + - AD5940_ADC_INPUTP_FLOATING + - AD5940_ADC_INPUTP_HSTIA + - AD5940_ADC_INPUTP_LPTIA_LP + - AD5940_ADC_INPUTP_AIN0 + - AD5940_ADC_INPUTP_AIN1 + - AD5940_ADC_INPUTP_AIN2 + - AD5940_ADC_INPUTP_AIN3 + - AD5940_ADC_INPUTP_AVDD_2 + - AD5940_ADC_INPUTP_DVDD_2 + - AD5940_ADC_INPUTP_AVDD_REG_2 + - AD5940_ADC_INPUTP_TEMP + - AD5940_ADC_INPUTP_VBIAS_CAP + - AD5940_ADC_INPUTP_DE0 + - AD5940_ADC_INPUTP_SE0 + - AD5940_ADC_INPUTP_VREF_2V5_2 + - AD5940_ADC_INPUTP_VREF_1V82 + - AD5940_ADC_INPUTP_P_TEMP_N + - AD5940_ADC_INPUTP_AIN4 + - AD5940_ADC_INPUTP_AIN6 + - AD5940_ADC_INPUTP_VZERO + - AD5940_ADC_INPUTP_VBIAS0 + - AD5940_ADC_INPUTP_VCE0 + - AD5940_ADC_INPUTP_VRE0 + - AD5940_ADC_INPUTP_VCE0_2 + - AD5940_ADC_INPUTP_LPTIA + - AD5940_ADC_INPUTP_AGND_REF + + - description: Negtive input channel + - enum: + # Negtive input candidates + - AD5940_ADC_INPUTN_FLOATING + - AD5940_ADC_INPUTN_HSTIA + - AD5940_ADC_INPUTN_LPTIA + - AD5940_ADC_INPUTN_AIN0 + - AD5940_ADC_INPUTN_AIN1 + - AD5940_ADC_INPUTN_AIN2 + - AD5940_ADC_INPUTN_AIN3 + - AD5940_ADC_INPUTN_VBIAS_CA8 + - AD5940_ADC_INPUTN_TEMP_N + - AD5940_ADC_INPUTN_AIN4 + - AD5940_ADC_INPUTN_AIN6 + - AD5940_ADC_INPUTN_VZERO + - AD5940_ADC_INPUTN_VBIAS0 + - AD5940_ADC_INPUTN_EXCITATION + + channel-name: + description: + Any string format name you would like to assign to this channel. + maxItems: 1 + + required: + - reg + - diff-channels + - channel-name + +examples: + - | + ad5940: ad5940@0 { + compatible = "adi,ad5940"; + reg = <0>; + spi-max-frequency = <16000000>; + vref-supply = <&adc_vref>; + interrupt-parent = <&gpio>; + interrupts = <24 2>; + + adi,interrupt-io = <0>; + + #address-cells = <1>; + #size-cells = <0>; + + channel@0 { + reg = <0>; + diff-channels = <AD5940_ADC_INPUTP_VCE0 + AD5940_ADC_INPUTN_VBIAS0>; + channel-name = "Vce-Vbias"; + }; + + channel@1 { + reg = <1>; + diff-channels = <AD5940_ADC_INPUTP_VRE0 + AD5940_ADC_INPUTN_VBIAS0>; + channel-name = "Vre-Vbias"; + }; + + channel@2 { + reg = <2>; + diff-channels = <AD5940_ADC_INPUTP_SE0 + AD5940_ADC_INPUTN_VBIAS0>; + channel-name = "Vse-Vbias"; + }; + + channel@3 { + reg = <3>; + diff-channels = <AD5940_ADC_INPUTP_DE0 + AD5940_ADC_INPUTN_VBIAS0>; + channel-name = "Vde-Vbias"; + }; + + channel@4 { + reg = <4>; + diff-channels = <AD5940_ADC_INPUTP_AIN0 + AD5940_ADC_INPUTN_VBIAS0>; + channel-name = "ain0-Vbias"; + }; + + channel@5 { + reg = <5>; + diff-channels = <AD5940_ADC_INPUTP_AIN1 + AD5940_ADC_INPUTN_VBIAS0>; + channel-name = "ain1-Vbias"; + }; + + channel@6 { + reg = <6>; + diff-channels = <AD5940_ADC_INPUTP_AIN2 + AD5940_ADC_INPUTN_VBIAS0>; + channel-name = "ain2-Vbias"; + }; + + channel@7 { + reg = <7>; + diff-channels = <AD5940_ADC_INPUTP_AIN3 + AD5940_ADC_INPUTN_VBIAS0>; + channel-name = "ain3-Vbias"; + }; + + channel@8 { + reg = <8>; + diff-channels = <AD5940_ADC_INPUTP_AIN4 + AD5940_ADC_INPUTN_VBIAS0>; + channel-name = "ain4-Vbias"; + }; + + channel@9 { + reg = <9>; + diff-channels = <AD5940_ADC_INPUTP_AIN6 + AD5940_ADC_INPUTN_VBIAS0>; + channel-name = "ain6-Vbias"; + }; + + channel@10 { + reg = <10>; + diff-channels = <AD5940_ADC_INPUTP_LPTIA_LP + AD5940_ADC_INPUTN_LPTIA>; + channel-name = "Low power TIA DC"; + }; + + channel@11 { + reg = <11>; + diff-channels = <AD5940_ADC_INPUTP_LPTIA + AD5940_ADC_INPUTN_LPTIA>; + channel-name = "Low power TIA AC"; + }; + + channel@12 { + reg = <12>; + diff-channels = <AD5940_ADC_INPUTP_HSTIA + AD5940_ADC_INPUTN_HSTIA>; + channel-name = "High Speed TIA"; + }; + + channel@13 { + reg = <13>; + diff-channels = <AD5940_ADC_INPUTP_TEMP + AD5940_ADC_INPUTN_VBIAS0>; + channel-name = "Temperature"; + }; + }; diff --git a/include/dt-bindings/iio/adc/adi,ad5940.h b/include/dt-bindings/iio/adc/adi,ad5940.h new file mode 100644 index 000000000000..c17826f2f654 --- /dev/null +++ b/include/dt-bindings/iio/adc/adi,ad5940.h @@ -0,0 +1,52 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * This header provides constants for configuring the AD5940 AFE + */ + +#ifndef _DT_BINDINGS_IIO_ADC_AD5940_H +#define _DT_BINDINGS_IIO_ADC_AD5940_H + +#define AD5940_ADC_INPUTN_FLOATING 0 +#define AD5940_ADC_INPUTN_HSTIA 1 +#define AD5940_ADC_INPUTN_LPTIA 2 +#define AD5940_ADC_INPUTN_AIN0 4 +#define AD5940_ADC_INPUTN_AIN1 5 +#define AD5940_ADC_INPUTN_AIN2 6 +#define AD5940_ADC_INPUTN_AIN3 7 +#define AD5940_ADC_INPUTN_VBIAS_CA8 10 +#define AD5940_ADC_INPUTN_TEMP_N 11 +#define AD5940_ADC_INPUTN_AIN4 12 +#define AD5940_ADC_INPUTN_AIN6 14 +#define AD5940_ADC_INPUTN_VZERO 16 +#define AD5940_ADC_INPUTN_VBIAS0 17 +#define AD5940_ADC_INPUTN_EXCITATION 20 + +#define AD5940_ADC_INPUTP_FLOATING 0 +#define AD5940_ADC_INPUTP_HSTIA 1 +#define AD5940_ADC_INPUTP_LPTIA_LP 2 +#define AD5940_ADC_INPUTP_AIN0 4 +#define AD5940_ADC_INPUTP_AIN1 5 +#define AD5940_ADC_INPUTP_AIN2 6 +#define AD5940_ADC_INPUTP_AIN3 7 +#define AD5940_ADC_INPUTP_AVDD_2 8 +#define AD5940_ADC_INPUTP_DVDD_2 9 +#define AD5940_ADC_INPUTP_AVDD_REG_2 10 +#define AD5940_ADC_INPUTP_TEMP 11 +#define AD5940_ADC_INPUTP_VBIAS_CAP 12 +#define AD5940_ADC_INPUTP_DE0 13 +#define AD5940_ADC_INPUTP_SE0 14 +#define AD5940_ADC_INPUTP_VREF_2V5_2 16 +#define AD5940_ADC_INPUTP_VREF_1V82 18 +#define AD5940_ADC_INPUTP_P_TEMP_N 19 +#define AD5940_ADC_INPUTP_AIN4 20 +#define AD5940_ADC_INPUTP_AIN6 22 +#define AD5940_ADC_INPUTP_VZERO 23 +#define AD5940_ADC_INPUTP_VBIAS0 24 +#define AD5940_ADC_INPUTP_VCE0 25 +#define AD5940_ADC_INPUTP_VRE0 26 +#define AD5940_ADC_INPUTP_VCE0_2 31 +#define AD5940_ADC_INPUTP_LPTIA 33 +#define AD5940_ADC_INPUTP_AGND_REF 35 +#define AD5940_ADC_INPUTP_EXCITATION 36 + +#endif /* _DT_BINDINGS_IIO_ADC_AD5940 */ -- 2.17.1
