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143 lines
4.1 KiB
143 lines
4.1 KiB
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) |
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%YAML 1.2 |
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--- |
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$id: http://devicetree.org/schemas/iio/adc/renesas,rcar-gyroadc.yaml# |
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$schema: http://devicetree.org/meta-schemas/core.yaml# |
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title: Renesas R-Car GyroADC |
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maintainers: |
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- Marek Vasut <[email protected]> |
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description: | |
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The GyroADC block is a reduced SPI block with up to 8 chipselect lines, |
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which supports the SPI protocol of a selected few SPI ADCs. The SPI ADCs |
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are sampled by the GyroADC block in a round-robin fashion and the result |
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presented in the GyroADC registers. |
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The ADC bindings should match with that of the devices connected to a |
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full featured SPI bus. |
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properties: |
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compatible: |
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items: |
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- enum: |
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- renesas,r8a7791-gyroadc |
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- renesas,r8a7792-gyroadc |
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- const: renesas,rcar-gyroadc |
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reg: |
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maxItems: 1 |
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clocks: |
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maxItems: 1 |
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clock-names: |
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const: fck |
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power-domains: true |
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resets: true |
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"#address-cells": |
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const: 1 |
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"#size-cells": |
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const: 0 |
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additionalProperties: false |
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required: |
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- compatible |
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- reg |
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- clocks |
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- clock-names |
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- "#address-cells" |
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- "#size-cells" |
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patternProperties: |
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"@[0-7]$": |
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type: object |
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properties: |
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compatible: |
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description: | |
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fujitsu,mb88101a |
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- Fujitsu MB88101A compatible mode, |
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12bit sampling, up to 4 channels can be sampled in round-robin |
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fashion. One Fujitsu chip supplies four GyroADC channels with |
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data as it contains four ADCs on the chip and thus for 4-channel |
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operation, single MB88101A is required. The Cx chipselect lines |
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of the MB88101A connect directly to two CHS lines of the GyroADC, |
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no demuxer is required. The data out line of each MB88101A |
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connects to a shared input pin of the GyroADC. |
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ti,adcs7476 or ti,adc121 or adi,ad7476 |
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- TI ADCS7476 / TI ADC121 / ADI AD7476 compatible mode, 15bit |
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sampling, up to 8 channels can be sampled in round-robin |
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fashion. One TI/ADI chip supplies single ADC channel with data, |
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thus for 8-channel operation, 8 chips are required. |
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A 3:8 chipselect demuxer is required to connect the nCS line |
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of the TI/ADI chips to the GyroADC, while MISO line of each |
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TI/ADI ADC connects to a shared input pin of the GyroADC. |
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maxim,max1162 or maxim,max11100 |
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- Maxim MAX1162 / Maxim MAX11100 compatible mode, 16bit sampling, |
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up to 8 channels can be sampled in round-robin fashion. One |
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Maxim chip supplies single ADC channel with data, thus for |
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8-channel operation, 8 chips are required. |
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A 3:8 chipselect demuxer is required to connect the nCS line |
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of the MAX chips to the GyroADC, while MISO line of each Maxim |
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ADC connects to a shared input pin of the GyroADC. |
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enum: |
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- adi,7476 |
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- fujitsu,mb88101a |
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- maxim,max1162 |
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- maxim,max11100 |
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- ti,adcs7476 |
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- ti,adc121 |
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reg: |
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minimum: 0 |
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maximum: 7 |
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vref-supply: true |
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additionalProperties: false |
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required: |
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- compatible |
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- reg |
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- vref-supply |
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examples: |
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- | |
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#include <dt-bindings/clock/r8a7791-clock.h> |
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#include <dt-bindings/power/r8a7791-sysc.h> |
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soc { |
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#address-cells = <2>; |
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#size-cells = <2>; |
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adc@e6e54000 { |
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compatible = "renesas,r8a7791-gyroadc", "renesas,rcar-gyroadc"; |
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reg = <0 0xe6e54000 0 64>; |
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clocks = <&mstp9_clks R8A7791_CLK_GYROADC>; |
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clock-names = "fck"; |
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power-domains = <&sysc R8A7791_PD_ALWAYS_ON>; |
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pinctrl-0 = <&adc_pins>; |
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pinctrl-names = "default"; |
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#address-cells = <1>; |
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#size-cells = <0>; |
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adc@0 { |
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reg = <0>; |
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compatible = "maxim,max1162"; |
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vref-supply = <&vref_max1162>; |
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}; |
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adc@1 { |
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reg = <1>; |
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compatible = "maxim,max1162"; |
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vref-supply = <&vref_max1162>; |
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}; |
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}; |
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}; |
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...
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