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iio: adc: Add initial driver support for MAX14001/MAX14002 #2848

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iio: adc: Add initial driver support for MAX14001/MAX14002 #2848

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0ecd86d
iio: adc: Add initial driver support for MAX14001/MAX14002
MarileneGarcia Jun 29, 2025
b451319
iio: adc: Improve initial drive features for MAX14001/MAX14002
MarileneGarcia Jul 20, 2025
42f812b
iio: adc: Add new methods for MAX14001/MAX14002 driver
MarileneGarcia Jul 23, 2025
b77c248
iio: adc: Correct some values to properly reflect the IIO_CHAN_INFO_S…
MarileneGarcia Jul 24, 2025
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1 change: 1 addition & 0 deletions arch/arm/boot/dts/overlays/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -309,6 +309,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
rpi-ltc2991.dtbo \
rpi-ltc4162.dtbo \
rpi-ltc6952.dtbo \
rpi-max14001-pmb.dtbo \
rpi-max14830-i2c.dtbo \
rpi-max14830-spi.dtbo \
rpi-max31335.dtbo \
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68 changes: 68 additions & 0 deletions arch/arm/boot/dts/overlays/rpi-max14001-pmb-overlay.dts
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Original file line number Diff line number Diff line change
@@ -0,0 +1,68 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Overlay for the MAX14001 ADC
*
* Copyright (c) 2025 Marilene Andrade Garcia <marilene.agarcia@gmail.com>
*
* Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/MAX14001-MAX14002.pdf
*/

/dts-v1/;
/plugin/;

/ {
compatible = "brcm,bcm2712";

vdd: fixedregulator@0 {
compatible = "regulator-fixed";
regulator-name = "Isolated DC-DC Power Supply Input Voltage";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-boot-on;
enable-active-high;
status = "okay";
};

vddl: fixedregulator@1 {
compatible = "regulator-fixed";
regulator-name = "Logic Power Supply Voltage";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-boot-on;
enable-active-high;
status = "okay";
};

vrefin: fixedregulator@2 {
compatible = "regulator-fixed";
regulator-name = "Reference Input Range Voltage";
regulator-min-microvolt = <1250000>;
regulator-max-microvolt = <1250000>;
regulator-boot-on;
enable-active-high;
status = "okay";
};
};

&spi0 {
status = "okay";
max14001_voltage_channel: max14001@0 {
compatible = "max14001";
reg = <0x0>;
spi-max-frequency = <5000000>;
vdd-supply = <&vdd>;
vddl-supply = <&vddl>;
vrefin-supply = <&vrefin>;
status = "okay";
};
max14001_current_channel: max14001@1 {
compatible = "max14001";
reg = <0x1>;
spi-max-frequency = <5000000>;
current-channel;
vdd-supply = <&vdd>;
vddl-supply = <&vddl>;
vrefin-supply = <&vrefin>;
status = "okay";
};
};
10 changes: 10 additions & 0 deletions drivers/iio/adc/Kconfig
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Expand Up @@ -1126,6 +1126,16 @@ config MAX1363
To compile this driver as a module, choose M here: the module will be
called max1363.

config MAX14001
tristate "Analog Devices MAX14001/MAX14002 ADCs driver"
depends on SPI
help
Say yes here to build support for Analog Devices MAX14001/MAX14002
Configurable, Isolated 10-bit ADCs for Multi-Range Binary Inputs.

To compile this driver as a module, choose M here: the module will be
called max14001.

config MAX77541_ADC
tristate "Analog Devices MAX77541 ADC driver"
depends on MFD_MAX77541
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1 change: 1 addition & 0 deletions drivers/iio/adc/Makefile
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Expand Up @@ -156,6 +156,7 @@ obj-$(CONFIG_MAX11205) += max11205.o
obj-$(CONFIG_MAX11410) += max11410.o
obj-$(CONFIG_MAX1241) += max1241.o
obj-$(CONFIG_MAX1363) += max1363.o
obj-$(CONFIG_MAX14001) += max14001.o
obj-$(CONFIG_MAX77541_ADC) += max77541-adc.o
obj-$(CONFIG_MAX9611) += max9611.o
obj-$(CONFIG_MCP320X) += mcp320x.o
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