2022-02-09 10:57:47

by Martin Povišer

Subject: [PATCH v4 1/3] dt-bindings: clock: Add Apple NCO

The NCO block found on Apple SoCs is a programmable clock generator
performing fractional division of a high frequency input clock.

Reviewed-by: Mark Kettenis <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
Signed-off-by: Martin Povišer <[email protected]>
---
.../devicetree/bindings/clock/apple,nco.yaml | 62 +++++++++++++++++++
1 file changed, 62 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/apple,nco.yaml

diff --git a/Documentation/devicetree/bindings/clock/apple,nco.yaml b/Documentation/devicetree/bindings/clock/apple,nco.yaml
new file mode 100644
index 000000000000..23ee3964fbde
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/apple,nco.yaml
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/apple,nco.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple SoCs' NCO block
+
+maintainers:
+ - Martin Povišer <[email protected]>
+
+description: |
+ The NCO (Numerically Controlled Oscillator) block found on Apple SoCs
+ such as the t8103 (M1) is a programmable clock generator performing
+ fractional division of a high frequency input clock.
+
+ It carries a number of independent channels and is typically used for
+ generation of audio bitclocks.
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - apple,t6000-nco
+ - apple,t8103-nco
+ - const: apple,nco
+
+ clocks:
+ description:
+ Specifies the reference clock from which the output clocks
+ are derived through fractional division.
+ maxItems: 1
+
+ '#clock-cells':
+ const: 1
+
+ reg:
+ maxItems: 1
+
+required:
+ - compatible
+ - clocks
+ - '#clock-cells'
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ nco_clkref: clock-ref {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <900000000>;
+ clock-output-names = "nco-ref";
+ };
+
+ nco: clock-controller@23b044000 {
+ compatible = "apple,t8103-nco", "apple,nco";
+ reg = <0x3b044000 0x14000>;
+ #clock-cells = <1>;
+ clocks = <&nco_clkref>;
+ };
--
2.33.0

2022-03-12 08:55:23

by Stephen Boyd

Subject: Re: [PATCH v4 1/3] dt-bindings: clock: Add Apple NCO

Quoting Martin Povišer (2022-02-08 10:34:09)
> The NCO block found on Apple SoCs is a programmable clock generator
> performing fractional division of a high frequency input clock.
>
> Reviewed-by: Mark Kettenis <[email protected]>
> Reviewed-by: Rob Herring <[email protected]>
> Signed-off-by: Martin Povišer <[email protected]>
> ---

Applied to clk-next