[PATCH] dt-bindings: hwmon: microchip,emc2305: add vcc-supply and #cooling-cells

[Vincent Jardin via B4 Relay]

From: Vincent Jardin <vjardin@xxxxxxx>

Both properties are missing, so a board that supplies either fails with
dtbs_check:

  fan-controller@2c (microchip,emc2305): '#cooling-cells', 'vcc-supply'
  do not match any of the regexes: '^fan@[0-4]$', '^pinctrl-[0-9]+$'

The #cooling-cells property belongs to the controller node, which is
where the driver actually registers.

Two cells is what that registration needs: a cooling-maps entry
references the fan as <&emc2305 min max>.

Two cells also documents what the driver supports today. The
pwm-separate path registers one cooling device per PWM against the same
node, and they all get cdev_id 0, so no cell count can tell them apart.
That is a driver issue, noted here but not addressed.

The examples in this binding put that property on the fan@N subnodes
instead, which does not match what the driver does: they are left alone
here rather than changed blind.

vcc-supply describes the chip's own rail, which matters on boards where
the sensor sits behind a switched supply.

Signed-off-by: Vincent Jardin <vjardin@xxxxxxx>
---
 Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml b/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml
index 8c2548539d7fd..47640214de100 100644
--- a/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml
+++ b/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml
@@ -44,6 +44,11 @@ properties:
            - 0 (Open-Drain)
            - 1 (Push-Pull)
 
+  vcc-supply: true
+
+  "#cooling-cells":
+    const: 2
+
 patternProperties:
   '^fan@[0-4]$':
     $ref: fan-common.yaml#

---
base-commit: 0a0d1d55dad570724bf8c7ea83409639cfb4be9b
change-id: 20260824-for-upstream-dt-emc2305-vcc-cooling-251655c99ef8

Best regards,
-- 
Vincent Jardin <vjardin@xxxxxxx>