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Message-Id: <20250318085444.3459380-2-florin.leotescu@oss.nxp.com>
Date: Tue, 18 Mar 2025 10:54:42 +0200
From: florin.leotescu@....nxp.com
To: Jean Delvare <jdelvare@...e.com>,
Guenter Roeck <linux@...ck-us.net>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Michael Shych <michaelsh@...dia.com>,
linux-hwmon@...r.kernel.org,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: viorel.suman@....com,
carlos.song@....com,
linux-arm-kernel@...ts.infradead.org,
imx@...ts.linux.dev,
festevam@...il.com,
Florin Leotescu <florin.leotescu@....com>,
Frank Li <Frank.Li@....com>
Subject: [PATCH v5 1/3] dt-bindings: hwmon: Add Microchip emc2305 support
From: Florin Leotescu <florin.leotescu@....com>
Introduce yaml schema for Microchip emc2305 pwm fan controller.
Signed-off-by: Florin Leotescu <florin.leotescu@....com>
Reviewed-by: Frank Li <Frank.Li@....com>
---
.../bindings/hwmon/microchip,emc2305.yaml | 113 ++++++++++++++++++
1 file changed, 113 insertions(+)
create mode 100644 Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml
diff --git a/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml b/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml
new file mode 100644
index 000000000000..e61ef97e63af
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml
@@ -0,0 +1,113 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+
+$id: http://devicetree.org/schemas/hwmon/microchip,emc2305.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip EMC2305 SMBus compliant PWM fan controller
+
+maintainers:
+ - Michael Shych <michaelsh@...dia.com>
+
+description:
+ Microchip EMC2301/2/3/5 pwm controller which supports
+ up to five programmable fan control circuits.
+
+properties:
+ compatible:
+ oneOf:
+ - enum:
+ - microchip,emc2305
+ - items:
+ - enum:
+ - microchip,emc2303
+ - microchip,emc2302
+ - microchip,emc2301
+ - const: microchip,emc2305
+
+ reg:
+ maxItems: 1
+
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+ '#pwm-cells':
+ const: 3
+ description: |
+ Number of cells in a PWM specifier.
+ - cell 0: The PWM frequency
+ - cell 1: The PWM polarity: 0 or PWM_POLARITY_INVERTED
+ - cell 2: The PWM output config:
+ - 0 (Open-Drain)
+ - 1 (Push-Pull)
+
+
+patternProperties:
+ '^fan@[0-4]$':
+ $ref: fan-common.yaml#
+ unevaluatedProperties: false
+ properties:
+ reg:
+ description:
+ The fan number used to determine the associated PWM channel.
+
+ required:
+ - reg
+ - pwms
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/pwm/pwm.h>
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ fan_controller: fan-controller@2f {
+ compatible = "microchip,emc2305";
+ reg = <0x2f>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ #pwm-cells = <3>;
+
+ fan@0 {
+ reg = <0x0>;
+ pwms = <&fan_controller 26000 PWM_POLARITY_INVERTED 1>;
+ #cooling-cells = <2>;
+ };
+
+ fan@1 {
+ reg = <0x1>;
+ pwms = <&fan_controller 26000 0 1>;
+ #cooling-cells = <2>;
+ };
+
+ fan@2 {
+ reg = <0x2>;
+ pwms = <&fan_controller 26000 0 1>;
+ #cooling-cells = <2>;
+ };
+
+ fan@3 {
+ reg = <0x3>;
+ pwms = <&fan_controller 26000 0 1>;
+ #cooling-cells = <2>;
+ };
+
+ fan@4 {
+ reg = <0x4>;
+ pwms = <&fan_controller 26000 0 1>;
+ #cooling-cells = <2>;
+ };
+ };
+ };
+...
--
2.34.1
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