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Message-ID: <20240822084808.299884-1-chanh@os.amperecomputing.com>
Date: Thu, 22 Aug 2024 08:48:08 +0000
From: Chanh Nguyen <chanh@...amperecomputing.com>
To: Jean Delvare <jdelvare@...e.com>,
Guenter Roeck <linux@...ck-us.net>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Justin Ledford <justinledford@...gle.com>,
devicetree@...r.kernel.org,
linux-hwmon@...r.kernel.org,
linux-kernel@...r.kernel.org,
OpenBMC Maillist <openbmc@...ts.ozlabs.org>,
Open Source Submission <patches@...erecomputing.com>
Cc: Phong Vo <phong@...amperecomputing.com>,
Thang Nguyen <thang@...amperecomputing.com>,
Quan Nguyen <quan@...amperecomputing.com>,
Khanh Pham <khpham@...erecomputing.com>,
Chanh Nguyen <chanh@...amperecomputing.com>,
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH v4] dt-bindings: hwmon: Add maxim max31790
Add device tree bindings and an example for max31790 device.
Signed-off-by: Chanh Nguyen <chanh@...amperecomputing.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
Changes in v2:
- Update filename of the maxim,max31790.yaml [Krzysztof]
- Add the common fan schema to $ref [Krzysztof]
- Update the node name to "fan-controller" in maxim,max31790.yaml [Krzysztof]
- Drop "driver" in commit title [Krzysztof]
Changes in v3:
- Drop redundant "bindings" in commit title [Krzysztof]
- Add the clocks and resets property in example [Krzysztof]
- Add child node refer to fan-common.yaml [Krzysztof, Conor]
Changes in v4:
- Add Chanh Nguyen to maintainers list [Chanh]
- Drop incomplete example [Krzysztof, Conor]
- Drop the cover letter because only a patch existed [Chanh]
---
.../bindings/hwmon/maxim,max31790.yaml | 70 +++++++++++++++++++
1 file changed, 70 insertions(+)
create mode 100644 Documentation/devicetree/bindings/hwmon/maxim,max31790.yaml
diff --git a/Documentation/devicetree/bindings/hwmon/maxim,max31790.yaml b/Documentation/devicetree/bindings/hwmon/maxim,max31790.yaml
new file mode 100644
index 000000000000..b1ff496f87f9
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/maxim,max31790.yaml
@@ -0,0 +1,70 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/maxim,max31790.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: The Maxim MAX31790 Fan Controller
+
+maintainers:
+ - Guenter Roeck <linux@...ck-us.net>
+ - Chanh Nguyen <chanh@...amperecomputing.com>
+
+description: >
+ The MAX31790 controls the speeds of up to six fans using six
+ independent PWM outputs. The desired fan speeds (or PWM duty cycles)
+ are written through the I2C interface.
+
+ Datasheets:
+ https://datasheets.maximintegrated.com/en/ds/MAX31790.pdf
+
+properties:
+ compatible:
+ const: maxim,max31790
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ resets:
+ maxItems: 1
+
+ "#pwm-cells":
+ const: 1
+
+patternProperties:
+ "^fan-[0-9]+$":
+ $ref: fan-common.yaml#
+ unevaluatedProperties: false
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ pwm_provider: fan-controller@20 {
+ compatible = "maxim,max31790";
+ reg = <0x20>;
+ clocks = <&sys_clk>;
+ resets = <&reset 0>;
+ #pwm-cells = <1>;
+
+ fan-0 {
+ pwms = <&pwm_provider 1>;
+ };
+
+ fan-1 {
+ pwms = <&pwm_provider 2>;
+ };
+ };
+ };
+
--
2.43.0
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