[v3 1/2] dt-bindings: Add bindings for aspeed pwm-tach and pwm.

[Billy Tsai <billy_tsai@aspeedtech.com>]

This patch adds device bindings for aspeed pwm-tach device which is a
multi-function device include pwn and tach function and pwm device which
should be the sub-node of pwm-tach device.

Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
---
 .../bindings/mfd/aspeed,ast2600-pwm-tach.yaml | 55 +++++++++++++++++++
 .../bindings/pwm/aspeed,ast2600-pwm.yaml      | 41 ++++++++++++++
 2 files changed, 96 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml
 create mode 100644 Documentation/devicetree/bindings/pwm/aspeed,ast2600-pwm.yaml

diff --git a/Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml b/Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml
new file mode 100644
index 000000000000..9626bbd50acd
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/aspeed,ast2600-pwm-tach.yaml
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2021 ASPEED, Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/aspeed,ast2600-pwm-tach.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: PWM Tach controller Device Tree Bindings
+
+description: |
+  The PWM Tach controller is represented as a multi-function device which
+  includes:
+    PWM
+    Tach
+
+maintainers:
+  - Billy Tsai <billy_tsai@aspeedtech.com>
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - aspeed,ast2600-pwm-tach
+      - const: syscon
+      - const: simple-mfd
+  reg:
+    maxItems: 1
+  clocks:
+    maxItems: 1
+  resets:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - resets
+
+additionalProperties:
+  type: object
+
+examples:
+  - |
+    #include <dt-bindings/clock/ast2600-clock.h>
+    pwm_tach: pwm_tach@1e610000 {
+      compatible = "aspeed,ast2600-pwm-tach", "syscon", "simple-mfd";
+      reg = <0x1e610000 0x100>;
+      clocks = <&syscon ASPEED_CLK_AHB>;
+      resets = <&syscon ASPEED_RESET_PWM>;
+
+      pwm: pwm {
+        compatible = "aspeed,ast2600-pwm";
+        #pwm-cells = <3>;
+      };
+    };
diff --git a/Documentation/devicetree/bindings/pwm/aspeed,ast2600-pwm.yaml b/Documentation/devicetree/bindings/pwm/aspeed,ast2600-pwm.yaml
new file mode 100644
index 000000000000..78db1c9c9b10
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/aspeed,ast2600-pwm.yaml
@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2021 ASPEED, Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pwm/aspeed,ast2600-pwm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ASPEED AST2600 PWM controller
+
+maintainers:
+  - Billy Tsai <billy_tsai@aspeedtech.com>
+
+description: |
+  The ASPEED PWM controller can support upto 16 PWM outputs.
+
+properties:
+  compatible:
+    enum:
+      - aspeed,ast2600-pwm
+
+  "#pwm-cells":
+    const: 3
+
+additionalProperties: false
+
+examples:
+  - |
+    // The PWM should be a subnode of a "aspeed,ast2600-pwm-tach" compatible
+    // node.
+    #include <dt-bindings/clock/ast2600-clock.h>
+    pwm_tach: pwm_tach@1e610000 {
+      compatible = "aspeed,ast2600-pwm-tach", "syscon", "simple-mfd";
+      reg = <0x1e610000 0x100>;
+      clocks = <&syscon ASPEED_CLK_AHB>;
+      resets = <&syscon ASPEED_RESET_PWM>;
+
+      pwm: pwm {
+        compatible = "aspeed,ast2600-pwm";
+        #pwm-cells = <3>;
+      };
+    };
-- 
2.25.1