[PATCH v4 2/2] hwmon: (adt7475) Added attenuator bypass support

Logan Shaw
2020-01-20T00:17:28Z

Added a new file documenting the adt7475 devicetree and added the four
new properties to it.

Signed-off-by: Logan Shaw <logan.shaw@alliedtelesis.co.nz>
---
---
.../devicetree/bindings/hwmon/adt7475.yaml | 90 +++++++++++++++++++
1 file changed, 90 insertions(+)
create mode 100644 Documentation/devicetree/bindings/hwmon/adt7475.yaml

diff --git a/Documentation/devicetree/bindings/hwmon/adt7475.yaml b/Documentation/devicetree/bindings/hwmon/adt7475.yaml
new file mode 100644
index 000000000000..f2427de9991e
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/adt7475.yaml
@@ -0,0 +1,90 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/adt7475.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ADT7475 hwmon sensor
+
+maintainers:
+ - Jean Delvare <jdelvare@suse.com>
+
+description: |
+ The ADT7473, ADT7475, ADT7476, and ADT7490 are thermal monitors and multiple
+ PWN fan controllers.
+
+ They support monitoring and controlling up to four fans (the ADT7490 can only
+ control up to three). They support reading a single on chip temperature
+ sensor and two off chip temperature sensors (the ADT7490 additionally
+ supports measuring up to three current external temperature sensors with
+ series resistance cancellation (SRC)).
+
+ Datasheets:
+ https://www.onsemi.com/pub/Collateral/ADT7473-D.PDF
+ https://www.onsemi.com/pub/Collateral/ADT7475-D.PDF
+ https://www.onsemi.com/pub/Collateral/ADT7476-D.PDF
+ https://www.onsemi.com/pub/Collateral/ADT7490-D.PDF
+
+ Description taken from omsemiconductors specification sheets, with minor
+ rephrasing.
+
+properties:
+ compatible:
+ enum:
+ - adi,adt7473
+ - adi,adt7475
+ - adi,adt7476
+ - adi,adt7490
+
+ reg:
+ maxItems: 1
+
+ bypass-attenuator-in0:
+ description: |
+ Configures bypassing the individual voltage input
+ attenuator, on in0. This is supported on the ADT7476 and ADT7490.
+ If set to a non-zero integer the attenuator is bypassed, if set to
+ zero the attenuator is not bypassed. If the property is absent then
+ the config register is not modified.
+ maxItems: 1
+
+ bypass-attenuator-in1:
+ description: |
+ Configures bypassing the individual voltage input
+ attenuator, on in1. This is supported on the ADT7473, ADT7475,
+ ADT7476 and ADT7490. If set to a non-zero integer the attenuator
+ is bypassed, if set to zero the attenuator is not bypassed. If the
+ property is absent then the config register is not modified.
+ maxItems: 1
+
+ bypass-attenuator-in3:
+ description: |
+ Configures bypassing the individual voltage input
+ attenuator, on in3. This is supported on the ADT7476 and ADT7490.
+ If set to a non-zero integer the attenuator is bypassed, if set to
+ zero the attenuator is not bypassed. If the property is absent then
+ the config register is not modified.
+ maxItems: 1
+
+ bypass-attenuator-in4:
+ description: |
+ Configures bypassing the individual voltage input
+ attenuator, on in4. This is supported on the ADT7476 and ADT7490.
+ If set to a non-zero integer the attenuator is bypassed, if set to
+ zero the attenuator is not bypassed. If the property is absent then
+ the config register is not modified.
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+
+examples:
+ - |
+ hwmon@2e {
+ compatible = "adi,adt7476";
+ reg = <0x2e>;
+ bypass-attenuator-in0 = <1>;
+ bypass-attenuator-in1 = <0>;
+ };
+...
--
2.25.0