Thread (15 messages) 15 messages, 5 authors, 2024-01-13

Re: [PATCH RESEND v10 1/3] dt-bindings: hwmon: fan: Add fan binding to schema

From: Rob Herring <robh@kernel.org>
Date: 2023-11-08 18:17:02
Also in: linux-aspeed, linux-devicetree, linux-doc, linux-hwmon, linux-pwm, lkml

On Tue, Nov 07, 2023 at 06:50:23PM +0800, Billy Tsai wrote:
From: Naresh Solanki <redacted>

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 <redacted>
Signed-off-by: Billy Tsai <redacted>
---
 .../devicetree/bindings/hwmon/fan-common.yaml | 78 +++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwmon/fan-common.yaml
Looking pretty good to me. It's disappointing that no one else 
interested in upstreaming their fan controller can be bothered to 
comment.
quoted hunk ↗ jump to hunk
diff --git a/Documentation/devicetree/bindings/hwmon/fan-common.yaml b/Documentation/devicetree/bindings/hwmon/fan-common.yaml
new file mode 100644
index 000000000000..be4ce3bd7f22
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/fan-common.yaml
@@ -0,0 +1,78 @@
+# 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@9elements.com>
+  - Billy Tsai <billy_tsai@aspeedtech.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
You need to define the possible values. I assume it's:

enum:
  - dc
  - pwm
  - anything else???

With that,

Reviewed-by: Rob Herring <robh@kernel.org>

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