linux-kernel - [PATCH v2 2/2] dt-bindings: hwmon: add MAX31790

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Date:   Fri, 15 Sep 2023 14:29:24 +0800
From:   Delphine CC Chiu <Delphine_CC_Chiu@...ynn.com>
To:     patrick@...cx.xyz, Delphine CC Chiu <Delphine_CC_Chiu@...ynn.com>,
        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>
Cc:     linux-hwmon@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/2] dt-bindings: hwmon: add MAX31790

Add dt-bindings for the MAXIM MAX31790.

Signed-off-by: Delphine CC Chiu <Delphine_CC_Chiu@...ynn.com>
---
Changelog:
v2 - Add dt-bindings for the MAXIM MAX31790.
---
 .../bindings/hwmon/maxim,max31790.yaml        | 59 +++++++++++++++++++
 MAINTAINERS                                   |  6 ++
 2 files changed, 65 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..2bd455b36b3f
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/maxim,max31790.yaml
@@ -0,0 +1,59 @@
+# 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: Maxim max31790
+
+maintainers:
+  - Delphine CC Chiu  <Delphine_CC_Chiu@...ynn.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.
+  The outputs drive “4-wire” fans directly, or can be used to modulate
+  the fan’s power terminals using an external pass transistor.
+
+  Datasheets:
+    https://datasheets.maximintegrated.com/en/ds/MAX31790.pdf
+
+properties:
+  compatible:
+    enum:
+      - maxim,max31790
+
+  reg:
+    maxItems: 1
+
+  pwm-as-tach:
+    description: |
+      There are 6 PWM output channel in MAX31790 that allows to be configured
+      as a TACH input by setting the Fan Configuration register.
+      Config PWM output channels in the array as tachometer inputs.
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 1
+    maxItems: 6
+    items:
+      enum: [1, 2, 3, 4, 5, 6]
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      pwm@20 {
+        compatible = "maxim,max31790";
+        reg = <0x20>;
+        pwm-as-tach = <2 5>;
+      };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index c8fdd0d03907..97e13b6bf51d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1371,6 +1371,12 @@ F:	Documentation/devicetree/bindings/hwmon/adi,max31760.yaml
 F:	Documentation/hwmon/max31760.rst
 F:	drivers/hwmon/max31760.c
 
+ANALOG DEVICES INC MAX31790 DRIVER
+M:	Delphine CC Chiu  <Delphine_CC_Chiu@...ynn.com>
+S:	Odd Fixes
+F:	Documentation/devicetree/bindings/hwmon/maxim,max31790.yaml
+F:	drivers/hwmon/max31790.c
+
 ANALOGBITS PLL LIBRARIES
 M:	Paul Walmsley <paul.walmsley@...ive.com>
 S:	Supported
-- 
2.25.1