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Oct 24, 2025
Merged

Add AD799X ADC support #7105

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6b10539
configs: Add the AD799X driver module
pelwell Oct 24, 2025
0f2061c
overlays: i2c-sensor: Add the ad799x ADC family
pelwell Oct 24, 2025
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32 changes: 28 additions & 4 deletions arch/arm/boot/dts/overlays/README
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Original file line number Diff line number Diff line change
Expand Up @@ -2421,16 +2421,40 @@ Name: i2c-sensor
Info: Adds support for a number of I2C barometric pressure, temperature,
light level and chemical sensors on i2c_arm
Load: dtoverlay=i2c-sensor,<param>=<val>
Params: addr Set the address for the ADS7828, ADS7830,
ADT7410, AS73211, AS7331, BH1750, BME280,
BME680, BMP280, BMP380, BMP58x, CCS811, DS1621,
HDC100X, HDC3020, JC42, LM75, MCP980x,
Params: addr Set the address for the AD799X, ADS7828,
ADS7830, ADT7410, AS73211, AS7331, BH1750,
BME280, BME680, BMP280, BMP380, BMP58x, CCS811,
DS1621, HDC100X, HDC3020, JC42, LM75, MCP980x,
MPU6050, MPU9250, MS5637, MS5803, MS5805,
MS5837, MS8607, SHT3x, TMP102 or VEML6030.

i2c-bus Supports all the standard I2C bus selection
parameters - see "dtoverlay -h i2c-bus"

ad7991 Select the Analog Devices AD7991 ADC
Valid addresses 0x28-0x29, default 0x28

ad7992 Select the Analog Devices AD7992 ADC
Valid addresses 0x20-0x24, default 0x20

ad7993 Select the Analog Devices AD7993 ADC
Valid addresses 0x20-0x24, default 0x20

ad7994 Select the Analog Devices AD7994 ADC
Valid addresses 0x20-0x24, default 0x20

ad7995 Select the Analog Devices AD7995 ADC
Valid addresses 0x28-0x29, default 0x28

ad7997 Select the Analog Devices AD7997 ADC
Valid addresses 0x20-0x24, default 0x20

ad7998 Select the Analog Devices AD7998 ADC
Valid addresses 0x20-0x24, default 0x20

ad7999 Select the Analog Devices AD7999 ADC
Valid address 0x29 (the default)

ads7828 Select the TI ADS7828 50kHz 8-channel 12bit ADC
Valid addresses 0x48-0x4b, default 0x48

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25 changes: 24 additions & 1 deletion arch/arm/boot/dts/overlays/i2c-sensor-common.dtsi
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Expand Up @@ -818,6 +818,20 @@
};
};

fragment@56 {
target = <&i2cbus>;
__dormant__ {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";

ad799x: ad799x@20 {
compatible = "adi,ad799x"; // To be overridden
reg = <0x20>;
};
};
};

fragment@98 {
target-path = "/";
__dormant__ {
Expand Down Expand Up @@ -896,6 +910,14 @@
veml6030 = <0>,"+50+99";
tmp117 = <0>,"+51+98";
scd4x = <0>,"+52";
ad7991 = <0>,"+56", <&ad799x>,"compatible=adi,ad7991", <&ad799x>,"reg:0=0x28";
ad7992 = <0>,"+56", <&ad799x>,"compatible=adi,ad7992";
ad7993 = <0>,"+56", <&ad799x>,"compatible=adi,ad7993";
ad7994 = <0>,"+56", <&ad799x>,"compatible=adi,ad7994";
ad7995 = <0>,"+56", <&ad799x>,"compatible=adi,ad7995", <&ad799x>,"reg:0=0x28";
ad7997 = <0>,"+56", <&ad799x>,"compatible=adi,ad7997";
ad7998 = <0>,"+56", <&ad799x>,"compatible=adi,ad7998";
ad7999 = <0>,"+56", <&ad799x>,"compatible=adi,ad7999", <&ad799x>,"reg:0=0x29";

addr = <&bme280>,"reg:0", <&bmp280>,"reg:0", <&tmp102>,"reg:0",
<&lm75>,"reg:0", <&hdc100x>,"reg:0", <&sht3x>,"reg:0",
Expand All @@ -910,7 +932,8 @@
<&as7331>,"reg:0", <&adxl345>,"reg:0",
<&ads7828>,"reg:0", <&ads7830>,"reg:0",
<&adxl355>,"reg:0", <&bmp58x>,"reg:0",
<&veml6030>,"reg:0", <&tmp117>,"reg:0";
<&veml6030>,"reg:0", <&tmp117>,"reg:0",
<&ad799x>,"reg:0";
int_pin = <&int_pins>, "brcm,pins:0",
<&int_pins>, "reg:0",
<&max30102>, "interrupts:0",
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1 change: 1 addition & 0 deletions arch/arm/configs/bcm2709_defconfig
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Expand Up @@ -1432,6 +1432,7 @@ CONFIG_IIO=m
CONFIG_IIO_BUFFER_CB=m
CONFIG_IIO_SW_TRIGGER=m
CONFIG_ADXL355_I2C=m
CONFIG_AD799X=m
CONFIG_MCP320X=m
CONFIG_MCP3422=m
CONFIG_TI_ADS1015=m
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1 change: 1 addition & 0 deletions arch/arm/configs/bcm2711_defconfig
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Expand Up @@ -1476,6 +1476,7 @@ CONFIG_IIO=m
CONFIG_IIO_BUFFER_CB=m
CONFIG_IIO_SW_TRIGGER=m
CONFIG_ADXL355_I2C=m
CONFIG_AD799X=m
CONFIG_MCP320X=m
CONFIG_MCP3422=m
CONFIG_TI_ADS1015=m
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1 change: 1 addition & 0 deletions arch/arm/configs/bcmrpi_defconfig
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Expand Up @@ -1424,6 +1424,7 @@ CONFIG_IIO=m
CONFIG_IIO_BUFFER_CB=m
CONFIG_IIO_SW_TRIGGER=m
CONFIG_ADXL355_I2C=m
CONFIG_AD799X=m
CONFIG_MCP320X=m
CONFIG_MCP3422=m
CONFIG_TI_ADS1015=m
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1 change: 1 addition & 0 deletions arch/arm64/configs/bcm2711_defconfig
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Expand Up @@ -1545,6 +1545,7 @@ CONFIG_IIO=m
CONFIG_IIO_BUFFER_CB=m
CONFIG_IIO_SW_TRIGGER=m
CONFIG_ADXL355_I2C=m
CONFIG_AD799X=m
CONFIG_MCP320X=m
CONFIG_MCP3422=m
CONFIG_TI_ADS1015=m
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1 change: 1 addition & 0 deletions arch/arm64/configs/bcm2711_rt_defconfig
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Expand Up @@ -1544,6 +1544,7 @@ CONFIG_IIO=m
CONFIG_IIO_BUFFER_CB=m
CONFIG_IIO_SW_TRIGGER=m
CONFIG_ADXL355_I2C=m
CONFIG_AD799X=m
CONFIG_MCP320X=m
CONFIG_MCP3422=m
CONFIG_TI_ADS1015=m
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1 change: 1 addition & 0 deletions arch/arm64/configs/bcm2712_defconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -1547,6 +1547,7 @@ CONFIG_IIO=m
CONFIG_IIO_BUFFER_CB=m
CONFIG_IIO_SW_TRIGGER=m
CONFIG_ADXL355_I2C=m
CONFIG_AD799X=m
CONFIG_MCP320X=m
CONFIG_MCP3422=m
CONFIG_TI_ADS1015=m
Expand Down
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