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iio: humidity: Add TI HDC20x0 support

PATCH In review Eugene Zaikonnikov 2 participants 3 messages Aug 7, 2020 – Aug 9, 2020

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Device tree bindings IIO
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Eugene Zaikonnikov

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#0 lore raw

PATCH v10 1/2 iio: humidity: Add TI HDC20x0 support

Add driver support for HDC2010/2080 series devices and sysfs documentation for their heater element.

HDC2010 is an integrated high-accuracy humidity and temperature sensor with very low power consumption. The device includes a resistive heating element. The temperature range is -40C to 125C with 0.2C accuracy. Humidity measurement is 0 to 100% with 2% RH accuracy.

Signed-off-by Eugene Zaikonnikov <[email protected]>

---

Heater capabilities are kept as IIO_CONST_ATTR for backwards compatibility (subject to further change).

Changes since v9:
- style and formatting changes after the feedback

Documentation/ABI/testing/sysfs-bus-iio-humidity-hdc2010 +9 -0
diff -uprN -X linux-5.3.8/Documentation/dontdiff linux-5.3.8/Documentation/ABI/testing/sysfs-bus-iio-humidity-hdc2010 linux-5.3.8_hdc2010/Documentation/ABI/testing/sysfs-bus-iio-humidity-hdc2010
@@ -0,0 +1,9 @@
+What:		/sys/bus/iio/devices/iio:deviceX/out_current_heater_raw
+What:		/sys/bus/iio/devices/iio:deviceX/out_current_heater_raw_available
+KernelVersion:	5.3.8
+Contact:	[email protected]
+Description:
+		Controls the heater device within the humidity sensor to get
+		rid of excess condensation.
+
+		Valid control values are 0 = OFF, and 1 = ON.
drivers/iio/humidity/hdc2010.c +353 -0

353 lines not on this page · raw message

drivers/iio/humidity/Kconfig +10 -0
diff -uprN -X linux-5.3.8/Documentation/dontdiff linux-5.3.8/drivers/iio/humidity/Kconfig linux-5.3.8_hdc2010/drivers/iio/humidity/Kconfig
@@ -38,6 +38,16 @@ config HDC100X
 	  To compile this driver as a module, choose M here: the module
 	  will be called hdc100x.
 
+config HDC2010
+	tristate "TI HDC2010 relative humidity and temperature sensor"
+	depends on I2C
+	help
+	  Say yes here to build support for the Texas Instruments
+	  HDC2010 and HDC2080 relative humidity and temperature sensors.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called hdc2010.
+
 config HID_SENSOR_HUMIDITY
 	tristate "HID Environmental humidity sensor"
 	depends on HID_SENSOR_HUB
drivers/iio/humidity/Makefile +1 -0
diff -uprN -X linux-5.3.8/Documentation/dontdiff linux-5.3.8/drivers/iio/humidity/Makefile linux-5.3.8_hdc2010/drivers/iio/humidity/Makefile
@@ -6,6 +6,7 @@
 obj-$(CONFIG_AM2315) += am2315.o
 obj-$(CONFIG_DHT11) += dht11.o
 obj-$(CONFIG_HDC100X) += hdc100x.o
+obj-$(CONFIG_HDC2010) += hdc2010.o
 obj-$(CONFIG_HID_SENSOR_HUMIDITY) += hid-sensor-humidity.o
 
 hts221-y := hts221_core.o \
author
#1 lore raw

PATCH v10 2/2 dt-bindings: iio: humidity: Add TI HDC20x0 support

Add device tree bindings for HDC2010/HDC2080 family of humidity and temperature sensors.

Signed-off-by Eugene Zaikonnikov <[email protected]>
Reviewed-by Rob Herring <[email protected]>

---

No changes since v9.

Changes since v8:
- document the use of reg
- change the license terms to GPL-2.0-only or BSD-2-clause

Documentation/devicetree/bindings/iio/humidity/ti,hdc2010.yaml +45 -0
diff -uprN linux-5.3.8/Documentation/devicetree/bindings/iio/humidity/ti,hdc2010.yaml linux-5.3.8_docs/Documentation/devicetree/bindings/iio/humidity/ti,hdc2010.yaml
@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/humidity/ti,hdc2010.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: HDC2010/HDC2080 humidity and temperature iio sensors
+
+maintainers:
+  - Eugene Zaikonnikov <[email protected]>
+
+description: |
+  Relative humidity and tempereature sensors on I2C bus
+
+  Datasheets are available at:
+    http://www.ti.com/product/HDC2010/datasheet
+    http://www.ti.com/product/HDC2080/datasheet
+
+properties:
+  compatible:
+    enum:
+      - ti,hdc2010
+      - ti,hdc2080
+
+  vdd-supply:
+    maxItems: 1
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+examples:
+  - |
+    i2c0 {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      humidity@40 {
+          compatible = "ti,hdc2010";
+          reg = <0x40>;
+      };
+    };
maintainer
#2 lore raw

Re: [PATCH v10 2/2] dt-bindings: iio: humidity: Add TI HDC20x0 support

Quoted 5 lines · On Fri, 07 Aug 2020 16:38:53 +0200 Eugene Zaikonnikov <[email protected]> wrote:

Add device tree bindings for HDC2010/HDC2080 family of humidity and temperature sensors.

Signed-off-by Eugene Zaikonnikov <[email protected]>
Reviewed-by Rob Herring <[email protected]>

Both applied to the togreg branch of iio.git and pushed out as testing for the autobuilders to play with it.

Thanks,

Jonathan

Quoted 57 lines

---

No changes since v9.

Changes since v8:
- document the use of reg
- change the license terms to GPL-2.0-only or BSD-2-clause

diff -uprN linux-5.3.8/Documentation/devicetree/bindings/iio/humidity/ti,hdc2010.yaml linux-5.3.8_docs/Documentation/devicetree/bindings/iio/humidity/ti,hdc2010.yaml

Documentation/devicetree/bindings/iio/humidity/ti,hdc2010.yaml +45 -0
@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/humidity/ti,hdc2010.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: HDC2010/HDC2080 humidity and temperature iio sensors
+
+maintainers:
+  - Eugene Zaikonnikov <[email protected]>
+
+description: |
+  Relative humidity and tempereature sensors on I2C bus
+
+  Datasheets are available at:
+    http://www.ti.com/product/HDC2010/datasheet
+    http://www.ti.com/product/HDC2080/datasheet
+
+properties:
+  compatible:
+    enum:
+      - ti,hdc2010
+      - ti,hdc2080
+
+  vdd-supply:
+    maxItems: 1
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+examples:
+  - |
+    i2c0 {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      humidity@40 {
+          compatible = "ti,hdc2010";
+          reg = <0x40>;
+      };
+    };