[PATCH 1/2] dt-bindings: hwmon: add Axiado AX3000 and AX3005 PWM fan controller

[Petar Stepanovic]

Add a Devicetree binding for the PWM fan controller found on the
Axiado AX3000 and AX3005 SoCs.

The controller measures fan speed using a hardware tachometer block.
Fan speed is controlled through a PWM signal supplied by an external
PWM controller.

Add a MAINTAINERS entry for the binding.

Signed-off-by: Petar Stepanovic <pstepanovic@xxxxxxxxxx>
---
 .../bindings/hwmon/axiado,ax3000-pwm-fan.yaml      | 68 ++++++++++++++++++++++
 MAINTAINERS                                        |  8 +++
 2 files changed, 76 insertions(+)

diff --git a/Documentation/devicetree/bindings/hwmon/axiado,ax3000-pwm-fan.yaml b/Documentation/devicetree/bindings/hwmon/axiado,ax3000-pwm-fan.yaml
new file mode 100644
index 000000000000..a985f49bbdcd
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/axiado,ax3000-pwm-fan.yaml
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/axiado,ax3000-pwm-fan.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Axiado AX3000 and AX3005 PWM Fan Controller
+
+maintainers:
+  - Petar Stepanovic <pstepanovic@xxxxxxxxxx>
+  - Akhila Kavi <akavi@xxxxxxxxxx>
+  - Prasad Bolisetty <pbolisetty@xxxxxxxxxx>
+
+description:
+  The Axiado AX3000 and AX3005 fan controllers use a hardware tachometer
+  block to measure fan speed. Fan speed is controlled through a PWM signal
+  supplied by an external PWM controller.
+
+properties:
+  compatible:
+    oneOf:
+      - const: axiado,ax3000-pwm-fan
+      - items:
+          - const: axiado,ax3005-pwm-fan
+          - const: axiado,ax3000-pwm-fan
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  pwms:
+    maxItems: 1
+    description:
+      PWM specifier used to control fan speed.
+
+  pulses-per-revolution:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 1
+    default: 2
+    description:
+      Number of tachometer pulses generated per fan revolution.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - pwms
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    fan@33001400 {
+        compatible = "axiado,ax3000-pwm-fan";
+        reg = <0x0 0x33001400 0x0 0x400>;
+        interrupts = <GIC_SPI 150 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&clk>;
+        pwms = <&pwm0 0 400>;
+    };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index a674e36529f7..f528b1a42e0f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4457,6 +4457,14 @@ W:	https://ez.analog.com/linux-software-drivers
 F:	Documentation/devicetree/bindings/pwm/adi,axi-pwmgen.yaml
 F:	drivers/pwm/pwm-axi-pwmgen.c
 
+AXIADO PWM FAN CONTROLLER DRIVER
+M:	Petar Stepanovic <pstepanovic@xxxxxxxxxx>
+M:	Akhila Kavi <akavi@xxxxxxxxxx>
+M:	Prasad Bolisetty <pbolisetty@xxxxxxxxxx>
+L:	linux-hwmon@xxxxxxxxxxxxxxx
+S:	Supported
+F:	Documentation/devicetree/bindings/hwmon/axiado,ax3000-pwm-fan.yaml
+
 AXIADO SPI DB DRIVER
 M:	Vladimir Moravcevic <vmoravcevic@xxxxxxxxxx>
 M:	Tzu-Hao Wei <twei@xxxxxxxxxx>

-- 
2.34.1