From: <michaelsh@nvidia.com>
To: <linux@roeck-us.net>, <robh+dt@kernel.org>
Cc: <linux-hwmon@vger.kernel.org>, <devicetree@vger.kernel.org>,
<vadimp@nvidia.com>, Michael Shych <michaelsh@nvidia.com>
Subject: [PATCH hwmon-next v4 2/3] dt-bindings: hwmon: add Microchip EMC2305 fan controller.
Date: Thu, 23 Jun 2022 19:52:16 +0300 [thread overview]
Message-ID: <20220623165217.59252-3-michaelsh@nvidia.com> (raw)
In-Reply-To: <20220623165217.59252-1-michaelsh@nvidia.com>
From: Michael Shych <michaelsh@nvidia.com>
Add basic description of emc2305 driver device tree binding.
Signed-off-by: Michael Shych <michaelsh@nvidia.com>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>
---
v2->v3
Changes pointed out by Rob Herring and Guenter Roeck:
- Describe separate channels of fan-controller;
- Remove pwm_max property;
- Fix compatible property.
Changes added by Michael Shych:
- Fix dt binding check warnings.
v1->v2
- Fix dt binding check errors;
- Add descriptions;
- Add missing fields;
- Change the patch subject name;
- Separate pwm-min, pwm-max per PWM channel.
---
.../bindings/hwmon/microchip,emc2305.yaml | 106 +++++++++++++++++++++
1 file changed, 106 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..d054ba46ae23
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/microchip,emc2305.yaml
@@ -0,0 +1,106 @@
+# SPDX-License-Identifier: (GPL-2.0 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 RPM-based PWM Fan Speed Controller
+
+maintainers:
+ - Michael Shych <michaelsh@nvidia.com>
+
+description: |
+ Microchip EMC2301/2/3/5 are RPM-based PWM Fan Controller.
+ The Fan Controller supports up to 5 independently controlled PWM fan drives.
+ Fan rotation speeds are reported in RPM.
+
+ Datasheet: https://www.microchip.com/en-us/product/EMC2305
+
+additionalProperties: false
+
+properties:
+ compatible:
+ enum:
+ - microchip,emc2305
+ - microchip,emc2303
+ - microchip,emc2302
+ - microchip,emc2301
+
+ reg:
+ maxItems: 1
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
+ microchip,cooling-levels:
+ description:
+ Quantity of cooling level state.
+ $ref: /schemas/types.yaml#/definitions/uint8
+ minimum: 0
+ maximum: 255
+
+ microchip,pwm-separate:
+ description:
+ This flag indicates that separate PWM setting will be used
+ for different channels.
+ $ref: /schemas/types.yaml#/definitions/flag
+
+patternProperties:
+ "^channel@[0-4]$":
+ type: object
+
+ additionalProperties: false
+
+ properties:
+ reg:
+ items:
+ - enum:
+ - 0
+ - 1
+ - 2
+ - 3
+ - 4
+
+ pwm-min:
+ description:
+ Min pwm of emc2305 channel
+ $ref: /schemas/types.yaml#/definitions/uint8
+ minimum: 0
+ maximum: 255
+
+ required:
+ - reg
+
+required:
+ - compatible
+
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ fan-controller@4d {
+ compatible = "microchip,emc2305";
+ reg = <0x4d>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ microchip,pwm-separate;
+ microchip,cooling-levels = /bits/ 8 <10>;
+
+ channel@0 {
+ reg = <0>;
+ pwm-min = /bits/ 8 <0>;
+ };
+ channel@1 {
+ reg = <1>;
+ pwm-min = /bits/ 8 <0>;
+ };
+ };
+ };
+
--
2.14.1
next prev parent reply other threads:[~2022-06-23 16:52 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-23 16:52 [PATCH hwmon-next v4 0/3] Add support for EMC2305 Fan Speed Controller michaelsh
2022-06-23 16:52 ` [PATCH hwmon-next v4 1/3] hwmon: (emc2305) add support for EMC2301/2/3/5 RPM-based PWM " michaelsh
2022-06-23 16:52 ` michaelsh [this message]
2022-06-30 22:11 ` [PATCH hwmon-next v4 2/3] dt-bindings: hwmon: add Microchip EMC2305 fan controller Rob Herring
2022-07-18 12:38 ` Michael Shych
2022-08-04 17:45 ` Rob Herring
2022-06-23 16:52 ` [PATCH hwmon-next v4 3/3] docs: hwmon: add emc2305.rst to docs michaelsh
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