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Add config and overlay support for the SCD4X CO2 sensors #7094

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Merged
pelwell merged 2 commits into from
Oct 19, 2025
Merged

Add config and overlay support for the SCD4X CO2 sensors #7094

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2102899
configs: Enable the SCD4X sensor driver
pelwell Oct 17, 2025
d47e427
overlays: i2c-sensor: Add the scd4x CO2 sensors
pelwell Oct 17, 2025
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2 changes: 2 additions & 0 deletions arch/arm/boot/dts/overlays/README
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Original file line number Diff line number Diff line change
Expand Up @@ -2576,6 +2576,8 @@ Params: addr Set the address for the ADS7828, ADS7830,
measurement in uOhms. (ina238 only, disabled
by default)

scd4x Select the Sensirion SCD40/41 CO2 sensors.

sht3x Select the Sensirion SHT3x temperature and
humidity sensors. Valid addresses 0x44-0x45,
default 0x44
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15 changes: 15 additions & 0 deletions arch/arm/boot/dts/overlays/i2c-sensor-common.dtsi
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Expand Up @@ -804,6 +804,20 @@
};
};

fragment@52 {
target = <&i2cbus>;
__dormant__ {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";

scd4x: scd4x@62 {
compatible = "sensirion,scd40";
reg = <0x62>;
};
};
};

fragment@98 {
target-path = "/";
__dormant__ {
Expand Down Expand Up @@ -881,6 +895,7 @@
bmp58x = <0>,"+49";
veml6030 = <0>,"+50+99";
tmp117 = <0>,"+51+98";
scd4x = <0>,"+52";

addr = <&bme280>,"reg:0", <&bmp280>,"reg:0", <&tmp102>,"reg:0",
<&lm75>,"reg:0", <&hdc100x>,"reg:0", <&sht3x>,"reg:0",
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1 change: 1 addition & 0 deletions arch/arm/configs/bcm2709_defconfig
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Expand Up @@ -1437,6 +1437,7 @@ CONFIG_MCP3422=m
CONFIG_TI_ADS1015=m
CONFIG_BME680=m
CONFIG_CCS811=m
CONFIG_SCD4X=m
CONFIG_SENSIRION_SGP30=m
CONFIG_SPS30_I2C=m
CONFIG_MAX30102=m
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1 change: 1 addition & 0 deletions arch/arm/configs/bcm2711_defconfig
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Expand Up @@ -1482,6 +1482,7 @@ CONFIG_MCP3422=m
CONFIG_TI_ADS1015=m
CONFIG_BME680=m
CONFIG_CCS811=m
CONFIG_SCD4X=m
CONFIG_SENSIRION_SGP30=m
CONFIG_SPS30_I2C=m
CONFIG_MAX30102=m
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1 change: 1 addition & 0 deletions arch/arm/configs/bcmrpi_defconfig
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Expand Up @@ -1429,6 +1429,7 @@ CONFIG_MCP3422=m
CONFIG_TI_ADS1015=m
CONFIG_BME680=m
CONFIG_CCS811=m
CONFIG_SCD4X=m
CONFIG_SENSIRION_SGP30=m
CONFIG_SPS30_I2C=m
CONFIG_MAX30102=m
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1 change: 1 addition & 0 deletions arch/arm64/configs/bcm2711_defconfig
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Expand Up @@ -1550,6 +1550,7 @@ CONFIG_MCP3422=m
CONFIG_TI_ADS1015=m
CONFIG_BME680=m
CONFIG_CCS811=m
CONFIG_SCD4X=m
CONFIG_SENSIRION_SGP30=m
CONFIG_SPS30_I2C=m
CONFIG_MAX30102=m
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1 change: 1 addition & 0 deletions arch/arm64/configs/bcm2711_rt_defconfig
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Expand Up @@ -1549,6 +1549,7 @@ CONFIG_MCP3422=m
CONFIG_TI_ADS1015=m
CONFIG_BME680=m
CONFIG_CCS811=m
CONFIG_SCD4X=m
CONFIG_SENSIRION_SGP30=m
CONFIG_SPS30_I2C=m
CONFIG_MAX30102=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 @@ -1552,6 +1552,7 @@ CONFIG_MCP3422=m
CONFIG_TI_ADS1015=m
CONFIG_BME680=m
CONFIG_CCS811=m
CONFIG_SCD4X=m
CONFIG_SENSIRION_SGP30=m
CONFIG_SPS30_I2C=m
CONFIG_MAX30102=m
Expand Down