| /* |
| * Copyright 2022 NXP |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #include <zephyr/dt-bindings/adc/mcux-lpadc.h> |
| |
| /* RT685 ADC only supports up to 1.8V, |
| * so limit regulator voltage to this range. |
| * Only test regulators we can safely change voltage to in RUN mode |
| */ |
| &ldo1 { |
| regulator-max-microvolt = <1800000>; |
| }; |
| |
| &ldo2 { |
| regulator-max-microvolt = <1800000>; |
| }; |
| |
| /* Override LPADC0 pinctrl settings */ |
| &pinmux_lpadc0 { |
| group0 { |
| pinmux = <ADC0_CH0_PIO0_5>, |
| <ADC0_CH2_PIO0_19>; |
| slew-rate = "normal"; |
| drive-strength = "normal"; |
| nxp,analog-mode; |
| }; |
| }; |
| |
| / { |
| /* Note: make the following connections to run test on an RT685: |
| * J30.1-> TP15 |
| * J30.3-> TP17 |
| */ |
| resources: resources { |
| compatible = "test-regulator-voltage"; |
| /* Note: LDO2 voltage range needs to be tested first |
| * to pass this test. It seems that when LDO2 is at the |
| * default voltage of 3.3V, LDO1 will not always deliver |
| * a voltage within given tolerance |
| */ |
| regulators = <&ldo2 &ldo1>; |
| io-channels = <&lpadc0 0>, <&lpadc0 1>; |
| tolerance-microvolt = <35000>, <35000>; |
| set-read-delay-ms = <20>; |
| adc-avg-count = <10>; |
| }; |
| }; |
| |
| &lpadc0 { |
| #address-cells = <1>; |
| #size-cells = <0>; |
| |
| channel@0 { |
| reg = <0>; |
| zephyr,gain = "ADC_GAIN_1"; |
| zephyr,reference = "ADC_REF_EXTERNAL0"; |
| zephyr,vref-mv = <1800>; |
| zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>; |
| zephyr,resolution = <12>; |
| zephyr,input-positive = <MCUX_LPADC_CH0A>; |
| }; |
| |
| channel@1 { |
| reg = <1>; |
| zephyr,gain = "ADC_GAIN_1"; |
| zephyr,reference = "ADC_REF_EXTERNAL0"; |
| zephyr,vref-mv = <1800>; |
| zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>; |
| zephyr,resolution = <12>; |
| zephyr,input-positive = <MCUX_LPADC_CH2A>; |
| }; |
| }; |
