[PATCH v7 1/2] dt-bindings: hwmon: Support Aspeed g6 PWM TACH Control

[Billy Tsai]

Document the compatible for aspeed,ast2600-pwm-tach device, which can
support upto 16 PWM outputs and 16 fan tach input.

Signed-off-by: Billy Tsai <billy_tsai@xxxxxxxxxxxxxx>
---
 .../bindings/hwmon/aspeed,g6-pwm-tach.yaml    | 57 +++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwmon/aspeed,g6-pwm-tach.yaml

diff --git a/Documentation/devicetree/bindings/hwmon/aspeed,g6-pwm-tach.yaml b/Documentation/devicetree/bindings/hwmon/aspeed,g6-pwm-tach.yaml
new file mode 100644
index 000000000000..1666304d0b0f
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/aspeed,g6-pwm-tach.yaml
@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2021 Aspeed, Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/aspeed,g6-pwm-tach.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ASPEED G6 PWM and Fan Tach controller device driver
+
+maintainers:
+  - Billy Tsai <billy_tsai@xxxxxxxxxxxxxx>
+
+description: |
+  The ASPEED PWM controller can support upto 16 PWM outputs.
+  The ASPEED Fan Tacho controller can support upto 16 fan tach input.
+
+properties:
+  compatible:
+    enum:
+      - aspeed,ast2600-pwm-tach
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  "#pwm-cells":
+    const: 3
+
+  aspeed,fan-tach-ch:
+    description: Specify the Fan tach input channels.
+    $ref: "/schemas/types.yaml#/definitions/uint8-array"
+
+required:
+  - reg
+  - clocks
+  - resets
+  - "#pwm-cells"
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/aspeed-clock.h>
+    pwm_tach: pwm-tach-controller@1e610000 {
+      compatible = "aspeed,ast2600-pwm-tach";
+      reg = <0x1e610000 0x100>;
+      clocks = <&syscon ASPEED_CLK_AHB>;
+      resets = <&syscon ASPEED_RESET_PWM>;
+      #pwm-cells = <3>;
+      aspeed,fan-tach-ch = /bits/ 8 <0x00 0x02 0x4>;
+    };
-- 
2.25.1