120 lines
2.9 KiB
YAML
120 lines
2.9 KiB
YAML
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# SPDX-License-Identifier: (GPL-2.0+ OR MIT)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/clock/rockchip,px30-cru.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Rockchip PX30 Clock and Reset Unit (CRU)
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maintainers:
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- Elaine Zhang <zhangqing@rock-chips.com>
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- Heiko Stuebner <heiko@sntech.de>
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description: |
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The PX30 clock controller generates and supplies clocks to various
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controllers within the SoC and also implements a reset controller for SoC
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peripherals.
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Each clock is assigned an identifier and client nodes can use this identifier
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to specify the clock which they consume. All available clocks are defined as
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preprocessor macros in the dt-bindings/clock/px30-cru.h headers and can be
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used in device tree sources. Similar macros exist for the reset sources in
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these files.
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There are several clocks that are generated outside the SoC. It is expected
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that they are defined using standard clock bindings with following
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clock-output-names:
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- "xin24m" - crystal input - required
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- "xin32k" - rtc clock - optional
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- "i2sx_clkin" - external I2S clock - optional
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- "gmac_clkin" - external GMAC clock - optional
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properties:
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compatible:
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enum:
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- rockchip,px30-cru
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- rockchip,px30-pmucru
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reg:
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maxItems: 1
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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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clocks:
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minItems: 1
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items:
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- description: Clock for both PMUCRU and CRU
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- description: Clock for CRU (sourced from PMUCRU)
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clock-names:
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minItems: 1
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items:
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- const: xin24m
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- const: gpll
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rockchip,grf:
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$ref: /schemas/types.yaml#/definitions/phandle
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description:
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Phandle to the syscon managing the "general register files" (GRF),
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if missing pll rates are not changeable, due to the missing pll
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lock status.
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required:
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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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- "#clock-cells"
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- "#reset-cells"
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allOf:
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- if:
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properties:
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compatible:
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contains:
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const: rockchip,px30-cru
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then:
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properties:
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clocks:
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minItems: 2
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clock-names:
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minItems: 2
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else:
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properties:
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clocks:
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maxItems: 1
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clock-names:
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maxItems: 1
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/clock/px30-cru.h>
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pmucru: clock-controller@ff2bc000 {
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compatible = "rockchip,px30-pmucru";
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reg = <0xff2bc000 0x1000>;
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clocks = <&xin24m>;
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clock-names = "xin24m";
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rockchip,grf = <&grf>;
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#clock-cells = <1>;
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#reset-cells = <1>;
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};
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cru: clock-controller@ff2b0000 {
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compatible = "rockchip,px30-cru";
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reg = <0xff2b0000 0x1000>;
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clocks = <&xin24m>, <&pmucru PLL_GPLL>;
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clock-names = "xin24m", "gpll";
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rockchip,grf = <&grf>;
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#clock-cells = <1>;
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#reset-cells = <1>;
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};
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