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dts: arm: adi: Add ADC inside devicetree
Add ADC peripheral definiton inside device tree file Add devicetree bindings for MAX32 ADC driver. Signed-off-by: Furkan Akkiz <[email protected]> Co-authored-by: Okan Sahin <[email protected]>
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‎dts/arm/adi/max32/max32662.dtsi

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/delete-node/ &uart2;
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&adc {
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compatible = "adi,max32-adc-sar", "adi,max32-adc";
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clock-source = <ADI_MAX32_PRPH_CLK_SRC_PCLK>;
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clock-divider = <16>;
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channel-count = <19>;
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track-count = <4>;
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idle-count = <0>;
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vref-mv = <1250>;
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resolution = <12>;
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};
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/* MAX32662 extra peripherals. */
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/ {
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soc {

‎dts/arm/adi/max32/max32672.dtsi

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/delete-node/ &clk_iso;
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&adc {
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compatible = "adi,max32-adc-sar", "adi,max32-adc";
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clock-source = <ADI_MAX32_PRPH_CLK_SRC_PCLK>;
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clock-divider = <16>;
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channel-count = <16>;
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track-count = <4>;
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idle-count = <0>;
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vref-mv = <1250>;
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resolution = <12>;
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};
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/* MAX32672 extra peripherals. */
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/ {
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soc {

‎dts/arm/adi/max32/max32690.dtsi

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};
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};
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&adc {
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compatible = "adi,max32-adc-sar", "adi,max32-adc";
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clock-source = <ADI_MAX32_PRPH_CLK_SRC_PCLK>;
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clock-divider = <16>;
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channel-count = <21>;
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track-count = <4>;
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idle-count = <5>;
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vref-mv = <1250>;
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resolution = <12>;
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};
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/* MAX32690 extra peripherals. */
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/ {
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soc {

‎dts/arm/adi/max32/max32xxx.dtsi

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#include <zephyr/dt-bindings/gpio/gpio.h>
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#include <zephyr/dt-bindings/clock/adi_max32_clock.h>
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#include <zephyr/dt-bindings/i2c/i2c.h>
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#include <zephyr/dt-bindings/adc/adc.h>
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#include <freq.h>
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clock-source = <ADI_MAX32_PRPH_CLK_SRC_PCLK>;
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status = "disabled";
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};
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adc: adc@40034000 {
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compatible = "adi,max32-adc-10b", "adi,max32-adc";
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reg = <0x40034000 0x1000>;
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clocks = <&gcr ADI_MAX32_CLOCK_BUS0 23>;
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channel-count = <17>;
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#io-channel-cells = <1>;
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interrupts = <20 0>;
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resolution = <10>;
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vref-mv = <1220>;
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status = "disabled";
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};
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};
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};
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‎dts/bindings/adc/adi,max32-adc-10b.yaml

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# Copyright (c) 2023-2024 Analog Devices, Inc.
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# SPDX-License-Identifier: Apache-2.0
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description: ADI MAX32 ADC 10-Bits
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compatible: "adi,max32-adc-10b"
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include:
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- name: adi,max32-adc.yaml
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property-blocklist:
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- clock-source
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- clock-divider
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- track-count
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- idle-count

‎dts/bindings/adc/adi,max32-adc-sar.yaml

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# Copyright (c) 2023-2024 Analog Devices, Inc.
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# SPDX-License-Identifier: Apache-2.0
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description: ADI MAX32 ADC SAR
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compatible: "adi,max32-adc-sar"
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include: adi,max32-adc.yaml

‎dts/bindings/adc/adi,max32-adc.yaml

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# Copyright (c) 2023-2024 Analog Devices, Inc.
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# SPDX-License-Identifier: Apache-2.0
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description: ADI MAX32 ADC
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compatible: "adi,max32-adc"
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include: [adc-controller.yaml, pinctrl-device.yaml]
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properties:
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reg:
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required: true
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interrupts:
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required: true
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clocks:
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required: true
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pinctrl-0:
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required: true
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pinctrl-names:
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required: true
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channel-count:
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type: int
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required: true
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description: The maximum channels supported on each unit.
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vref-mv:
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type: int
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required: true
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description: Indicates the reference voltage of the ADC in mV (on the target board).
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resolution:
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type: int
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required: true
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description: Indicates the resolution supported by the ADC instance.
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clock-source:
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required: true
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type: int
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enum: [0, 1, 2, 3]
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description: |
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Clock source to be used by the ADC peripheral. The following options
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are available:
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- 0: "ADI_MAX32_PRPH_CLK_SRC_PCLK" Peripheral clock
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- 1: "ADI_MAX32_PRPH_CLK_SRC_EXTCLK" External Clock
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- 2: "ADI_MAX32_PRPH_CLK_SRC_IBRO" Internal Baud Rate Oscillator
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- 3: "ADI_MAX32_PRPH_CLK_SRC_ERFO" External Radio Frequency Oscillator
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The target device might not support every option please take a look on
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target device user guide
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clock-divider:
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required: true
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type: int
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enum: [1, 2, 4, 8, 16]
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description: |
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The clock divider divides the ADC source clock to set the ADC clock frequency as follows:
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F_sar_clk = F_clock_source / clock divider
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track-count:
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required: true
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type: int
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description: |
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The number of cycles to add to the minimum track time.
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idle-count:
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required: true
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type: int
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description: |
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The number of cycles to add to the minimum hold time.
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"#io-channel-cells":
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const: 1
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io-channel-cells:
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- input

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