linux-kernel - [PATCH v13 1/3] dt-bindings: hwmon: fan: Add fan binding to schema

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Date: Wed, 24 Jan 2024 14:07:03 +0800
From: Billy Tsai <billy_tsai@...eedtech.com>
To: <jdelvare@...e.com>, <linux@...ck-us.net>, <robh+dt@...nel.org>,
	<krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>, <joel@....id.au>,
	<andrew@...econstruct.com.au>, <corbet@....net>,
	<u.kleine-koenig@...gutronix.de>, <p.zabel@...gutronix.de>,
	<billy_tsai@...eedtech.com>, <naresh.solanki@...ements.com>,
	<linux-hwmon@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-aspeed@...ts.ozlabs.org>,
	<linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>,
	<linux-pwm@...r.kernel.org>, <BMC-SW@...eedtech.com>, <patrick@...cx.xyz>
Subject: [PATCH v13 1/3] dt-bindings: hwmon: fan: Add fan binding to schema

From: Naresh Solanki <naresh.solanki@...ements.com>

Add common fan properties bindings to a schema.

Bindings for fan controllers can reference the common schema for the
fan

child nodes:

  patternProperties:
    "^fan@[0-2]":
      type: object
      $ref: fan-common.yaml#
      unevaluatedProperties: false

Signed-off-by: Naresh Solanki <naresh.solanki@...ements.com>
Signed-off-by: Billy Tsai <billy_tsai@...eedtech.com>
---
 .../devicetree/bindings/hwmon/fan-common.yaml | 79 +++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwmon/fan-common.yaml

diff --git a/Documentation/devicetree/bindings/hwmon/fan-common.yaml b/Documentation/devicetree/bindings/hwmon/fan-common.yaml
new file mode 100644
index 000000000000..0fb738081699
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/fan-common.yaml
@@ -0,0 +1,79 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/fan-common.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Common Fan Properties
+
+maintainers:
+  - Naresh Solanki <naresh.solanki@...ements.com>
+  - Billy Tsai <billy_tsai@...eedtech.com>
+
+properties:
+  max-rpm:
+    description:
+      Max RPM supported by fan.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maximum: 100000
+
+  min-rpm:
+    description:
+      Min RPM supported by fan.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maximum: 1000
+
+  pulses-per-revolution:
+    description:
+      The number of pulse from fan sensor per revolution.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    maximum: 4
+
+  tach-div:
+    description:
+      Divisor for the tach sampling clock, which determines the sensitivity of the tach pin.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  target-rpm:
+    description:
+      The default desired fan speed in RPM.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  fan-driving-mode:
+    description:
+      Select the driving mode of the fan.(DC, PWM and so on)
+    $ref: /schemas/types.yaml#/definitions/string
+    enum: [ dc, pwm ]
+
+  pwms:
+    description:
+      PWM provider.
+    maxItems: 1
+
+  "#cooling-cells":
+    const: 2
+
+  cooling-levels:
+    description:
+      The control value which correspond to thermal cooling states.
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+
+  tach-ch:
+    description:
+      The tach channel used for the fan.
+    $ref: /schemas/types.yaml#/definitions/uint8-array
+
+  label:
+    description:
+      Optional fan label
+
+  fan-supply:
+    description:
+      Power supply for fan.
+
+  reg:
+    maxItems: 1
+
+additionalProperties: true
+
+...
-- 
2.25.1