Introduce yaml schema for Microchip emc2101 pwm fan controller with
temperature monitoring.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
---
 .../bindings/hwmon/microchip,emc2101.yaml     | 59 +++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwmon/microchip,emc2101.yaml

 v3: fix errors, remove patternProperties and drop emc2101-r.

 v2: add missing properties.

diff --git a/Documentation/devicetree/bindings/hwmon/microchip,emc2101.yaml b/Documentation/devicetree/bindings/hwmon/microchip,emc2101.yaml
new file mode 100644
index 000000000000..10167747f748
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/microchip,emc2101.yaml
@@ -0,0 +1,59 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/microchip,emc2101.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip EMC2101 SMBus compliant PWM fan controller
+
+maintainers:
+  - Álvaro Fernández Rojas <noltari@gmail.com>
+
+description:
+  Microchip EMC2101 pwm controller which supports up to 1 fan, 1 internal
+  temperature sensor, 1 external temperature sensor and an 8 entry look
+  up table to create a programmable temperature response.
+
+properties:
+  compatible:
+    enum:
+      - microchip,emc2101
+
+  reg:
+    maxItems: 1
+
+  fan:
+    $ref: fan-common.yaml#
+    unevaluatedProperties: false
+
+  '#pwm-cells':
+    const: 2
+    description: |
+      Number of cells in a PWM specifier.
+      - cell 0: The PWM frequency
+      - cell 1: The PWM polarity: 0 or PWM_POLARITY_INVERTED
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        fan_controller: fan-controller@4c {
+            compatible = "microchip,emc2101";
+            reg = <0x4c>;
+
+            #pwm-cells = <2>;
+
+            fan {
+                pwms = <&fan_controller 5806 0>;
+            };
+        };
+    };
+...
-- 
2.39.5

On Wed, Jul 09, 2025 at 06:48:28PM +0200, Álvaro Fernández Rojas wrote:
> Introduce yaml schema for Microchip emc2101 pwm fan controller with
> temperature monitoring.
> 
> Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
> ---

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

<form letter>
This is an automated instruction, just in case, because many review
tags are being ignored. If you know the process, just skip it entirely
(please do not feel offended by me posting it here - no bad intentions
intended, no patronizing, I just want to avoid wasted efforts). If you
do not know the process, here is a short explanation:

Please add Acked-by/Reviewed-by/Tested-by tags when posting new
versions of patchset, under or above your Signed-off-by tag, unless
patch changed significantly (e.g. new properties added to the DT
bindings). Tag is "received", when provided in a message replied to you
on the mailing list. Tools like b4 can help here ('b4 trailers -u ...').
However, there's no need to repost patches *only* to add the tags. The
upstream maintainer will do that for tags received on the version they
apply.

https://elixir.bootlin.com/linux/v6.15/source/Documentation/process/submitting-patches.rst#L591
</form letter>

Best regards,
Krzysztof