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52dbf84857
The Allwinner A523/T527 SoCs have four CCUs, this adds the binding for the main and the PRCM R-CCU. The source clock list differs in some annoying details, and folding this into the existing Allwinner CCU clock binding document gets quite unwieldy, so create a new document for these CCUs. Add the new compatible string, along with the required input clock lists. This conditionally describes the input clock lists, to make adding support for the other two CCUs easier. Also add the DT binding headers, listing all the clocks with their ID numbers. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Link: https://patch.msgid.link/20250307002628.10684-5-andre.przywara@arm.com Signed-off-by: Chen-Yu Tsai <wens@csie.org>
104 lines
2.2 KiB
YAML
104 lines
2.2 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/clock/allwinner,sun55i-a523-ccu.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Allwinner A523 Clock Control Unit
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maintainers:
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- Andre Przywara <andre.przywara@arm.com>
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properties:
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"#clock-cells":
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const: 1
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"#reset-cells":
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const: 1
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compatible:
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enum:
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- allwinner,sun55i-a523-ccu
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- allwinner,sun55i-a523-r-ccu
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reg:
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maxItems: 1
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clocks:
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minItems: 4
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maxItems: 5
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clock-names:
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minItems: 4
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maxItems: 5
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required:
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- "#clock-cells"
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- "#reset-cells"
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- compatible
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- reg
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- clocks
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- clock-names
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allOf:
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- if:
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properties:
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compatible:
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enum:
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- allwinner,sun55i-a523-ccu
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then:
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properties:
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clocks:
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items:
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- description: High Frequency Oscillator (usually at 24MHz)
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- description: Low Frequency Oscillator (usually at 32kHz)
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- description: Internal Oscillator
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- description: Low Frequency Oscillator fanout
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clock-names:
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items:
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- const: hosc
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- const: losc
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- const: iosc
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- const: losc-fanout
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- if:
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properties:
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compatible:
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enum:
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- allwinner,sun55i-a523-r-ccu
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then:
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properties:
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clocks:
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items:
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- description: High Frequency Oscillator (usually at 24MHz)
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- description: Low Frequency Oscillator (usually at 32kHz)
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- description: Internal Oscillator
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- description: Peripherals PLL
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- description: Audio PLL
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clock-names:
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items:
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- const: hosc
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- const: losc
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- const: iosc
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- const: pll-periph
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- const: pll-audio
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additionalProperties: false
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examples:
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- |
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clock-controller@2001000 {
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compatible = "allwinner,sun55i-a523-ccu";
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reg = <0x02001000 0x1000>;
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clocks = <&osc24M>, <&osc32k>, <&iosc>, <&r_ccu 1>;
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clock-names = "hosc", "losc", "iosc", "losc-fanout";
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#clock-cells = <1>;
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#reset-cells = <1>;
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};
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...
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