linux-kernel - [PATCH v2] dt-bindings: hwmon: gpio-fan: convert to YAML

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Message-Id: <20221217210423.836948-1-clabbe@baylibre.com>
Date:   Sat, 17 Dec 2022 21:04:23 +0000
From:   Corentin Labbe <clabbe@...libre.com>
To:     jdelvare@...e.com, krzysztof.kozlowski+dt@...aro.org,
        linux@...ck-us.net, robh+dt@...nel.org
Cc:     devicetree@...r.kernel.org, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org, conor@...nel.org,
        Corentin Labbe <clabbe@...libre.com>
Subject: [PATCH v2] dt-bindings: hwmon: gpio-fan: convert to YAML

Converts hwmon/gpio-fan.txt to YAML

Signed-off-by: Corentin Labbe <clabbe@...libre.com>
---
Changes since v1:
- Keeped only one example and simplified it

 .../devicetree/bindings/hwmon/gpio-fan.txt    | 41 -------------
 .../devicetree/bindings/hwmon/gpio-fan.yaml   | 59 +++++++++++++++++++
 2 files changed, 59 insertions(+), 41 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/hwmon/gpio-fan.txt
 create mode 100644 Documentation/devicetree/bindings/hwmon/gpio-fan.yaml

diff --git a/Documentation/devicetree/bindings/hwmon/gpio-fan.txt b/Documentation/devicetree/bindings/hwmon/gpio-fan.txt
deleted file mode 100644
index f4cfa350f6a1..000000000000
--- a/Documentation/devicetree/bindings/hwmon/gpio-fan.txt
+++ /dev/null
@@ -1,41 +0,0 @@
-Bindings for fan connected to GPIO lines
-
-Required properties:
-- compatible : "gpio-fan"
-
-Optional properties:
-- gpios: Specifies the pins that map to bits in the control value,
-  ordered MSB-->LSB.
-- gpio-fan,speed-map: A mapping of possible fan RPM speeds and the
-  control value that should be set to achieve them. This array
-  must have the RPM values in ascending order.
-- alarm-gpios: This pin going active indicates something is wrong with
-  the fan, and a udev event will be fired.
-- #cooling-cells: If used as a cooling device, must be <2>
-  Also see:
-  Documentation/devicetree/bindings/thermal/thermal-cooling-devices.yaml
-  min and max states are derived from the speed-map of the fan.
-
-Note: At least one the "gpios" or "alarm-gpios" properties must be set.
-
-Examples:
-
-	gpio_fan {
-		compatible = "gpio-fan";
-		gpios = <&gpio1 14 1
-			 &gpio1 13 1>;
-		gpio-fan,speed-map = <0    0
-				      3000 1
-				      6000 2>;
-		alarm-gpios = <&gpio1 15 1>;
-	};
-	gpio_fan_cool: gpio_fan {
-		compatible = "gpio-fan";
-		gpios = <&gpio2 14 1
-			 &gpio2 13 1>;
-		gpio-fan,speed-map =	<0    0>,
-					<3000 1>,
-					<6000 2>;
-		alarm-gpios = <&gpio2 15 1>;
-		#cooling-cells = <2>; /* min followed by max */
-	};
diff --git a/Documentation/devicetree/bindings/hwmon/gpio-fan.yaml b/Documentation/devicetree/bindings/hwmon/gpio-fan.yaml
new file mode 100644
index 000000000000..c522072c0d07
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/gpio-fan.yaml
@@ -0,0 +1,59 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/gpio-fan.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Bindings for fan connected to GPIO lines
+
+maintainers:
+  - OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS <devicetree@...r.kernel.org>
+
+properties:
+  compatible:
+    const: gpio-fan
+
+  gpios:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    description: Specifies the pins that map to bits in the control value,
+      ordered MSB-->LSB.
+
+  gpio-fan,speed-map:
+    $ref: /schemas/types.yaml#/definitions/uint32-matrix
+    description: A mapping of possible fan RPM speeds and the
+      control value that should be set to achieve them. This array
+      must have the RPM values in ascending order.
+
+  alarm-gpios:
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    description: This pin going active indicates something is wrong with
+      the fan, and a udev event will be fired.
+
+  "#cooling-cells":
+    const: 2
+    description: If used as a cooling device, must be <2>
+      Also see Documentation/devicetree/bindings/thermal/thermal-cooling-devices.yaml
+      min and max states are derived from the speed-map of the fan.
+
+anyOf:
+  - required:
+      - gpios
+  - required:
+      - alarm-gpios
+
+additionalProperties: False
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/clock/cortina,gemini-clock.h>
+    #include <dt-bindings/reset/cortina,gemini-reset.h>
+    #include <dt-bindings/gpio/gpio.h>
+    gpio_fan {
+      compatible = "gpio-fan";
+        gpios = <&gpio1 8 GPIO_ACTIVE_HIGH>;
+        gpio-fan,speed-map = <0    0>,
+                             <3000 1>,
+                             <6000 2>;
+        alarm-gpios = <&gpio1 15 GPIO_ACTIVE_HIGH>;
+    };
-- 
2.37.4