dt-binding: clock: Document canaan,k210-clk bindings

Document the device tree bindings of the Canaan Kendryte K210 SoC clock
driver in Documentation/devicetree/bindings/clock/canaan,k210-clk.yaml.
The header file include/dt-bindings/clock/k210-clk.h is modified to
include the complete list of IDs for all clocks of the SoC.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20201220085725.19545-3-damien.lemoal@wdc.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

1 files changed, 54 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/clock/canaan,k210-clk.yaml b/Documentation/devicetree/bindings/clock/canaan,k210-clk.yaml
new file mode 100644
index 000000000000..565ca468cb44
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/canaan,k210-clk.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/canaan,k210-clk.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Canaan Kendryte K210 Clock Device Tree Bindings
+
+maintainers:
+  - Damien Le Moal <damien.lemoal@wdc.com>
+
+description: |
+  Canaan Kendryte K210 SoC clocks driver bindings. The clock
+  controller node must be defined as a child node of the K210
+  system controller node.
+
+  See also:
+  - dt-bindings/clock/k210-clk.h
+
+properties:
+  compatible:
+    const: canaan,k210-clk
+
+  clocks:
+    description:
+      Phandle of the SoC 26MHz fixed-rate oscillator clock.
+
+  '#clock-cells':
+    const: 1
+
+required:
+  - compatible
+  - '#clock-cells'
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/k210-clk.h>
+    clocks {
+      in0: oscillator {
+        compatible = "fixed-clock";
+        #clock-cells = <0>;
+        clock-frequency = <26000000>;
+      };
+    };
+
+    /* ... */
+    sysclk: clock-controller {
+      #clock-cells = <1>;
+      compatible = "canaan,k210-clk";
+      clocks = <&in0>;
+    };