[PATCH 03/21] dt-bindings: clock: Add Google gs101 clock management unit bindings
Krzysztof Kozlowski
krzysztof.kozlowski at linaro.org
Thu Oct 5 09:06:19 PDT 2023
On 05/10/2023 17:56, Peter Griffin wrote:
> Provide dt-schema documentation for Google gs101 SoC clock controller.
>
> Signed-off-by: Peter Griffin <peter.griffin at linaro.org>
> ---
> .../bindings/clock/google,gs101-clock.yaml | 109 ++++++++++++++++++
> 1 file changed, 109 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/clock/google,gs101-clock.yaml
>
> diff --git a/Documentation/devicetree/bindings/clock/google,gs101-clock.yaml b/Documentation/devicetree/bindings/clock/google,gs101-clock.yaml
> new file mode 100644
> index 000000000000..a28d05d88afe
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/google,gs101-clock.yaml
> @@ -0,0 +1,109 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/google,gs101-clock.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Google GS101 SoC clock controller
> +
> +maintainers:
> + - Peter Griffin <peter.griffin at linaro.org>
> +
> +description: |
> + Google GS101 clock controller is comprised of several CMU units, generating
> + clocks for different domains. Those CMU units are modeled as separate device
> + tree nodes, and might depend on each other. The root clock in that clock tree
> + is OSCCLK (24.576 MHz). That external clock must be defined as a fixed-rate
> + clock in dts.
> +
> + CMU_TOP is a top-level CMU, where all base clocks are prepared using PLLs and
> + dividers; all other leaf clocks (other CMUs) are usually derived from CMU_TOP.
> +
> + Each clock is assigned an identifier and client nodes can use this identifier
> + to specify the clock which they consume. All clocks available for usage
> + in clock consumer nodes are defined as preprocessor macros in
> + 'dt-bindings/clock/gs101.h' header.
> +
> +properties:
> + compatible:
> + enum:
> + - google,gs101-cmu-top
> + - google,gs101-cmu-apm
> + - google,gs101-cmu-misc
> +
> + clocks:
> + minItems: 1
> + maxItems: 5
I see max 2 clocks.
> +
> + clock-names:
> + minItems: 1
> + maxItems: 5
> +
> + "#clock-cells":
> + const: 1
> +
> + reg:
> + maxItems: 1
> +
> +allOf:
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: google,gs101-cmu-top
> +
> + then:
> + properties:
> + clocks:
> + items:
> + - description: External reference clock (24.576 MHz)
> +
> + clock-names:
> + items:
> + - const: oscclk
> +
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: google,gs101-cmu-misc
> +
> + then:
> + properties:
> + clocks:
> + items:
> + - description: External reference clock (24.576 MHz)
> + - description: Misc bus clock (from CMU_TOP)
> +
> + clock-names:
> + items:
> + - const: oscclk
> + - const: dout_cmu_misc_bus
What about google,gs101-cmu-apm?
> +
> +required:
"required:" go before "allOf:"
> + - compatible
> + - "#clock-cells"
> + - clocks
> + - clock-names
> + - reg
> +
> +additionalProperties: false
> +
> +examples:
> + # Clock controller node for CMU_TOP
> + - |
> + #include <dt-bindings/interrupt-controller/gs101.h>
> + soc {
> + #address-cells = <2>;
> + #size-cells = <1>;
Messed indentation.
> +
> +...
Best regards,
Krzysztof
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