0001 # SPDX-License-Identifier: GPL-2.0
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/clock/rockchip,rv1108-cru.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: Rockchip RV1108 Clock and Reset Unit (CRU)
0008
0009 maintainers:
0010 - Elaine Zhang <zhangqing@rock-chips.com>
0011 - Heiko Stuebner <heiko@sntech.de>
0012
0013 description: |
0014 The RV1108 clock controller generates and supplies clocks to various
0015 controllers within the SoC and also implements a reset controller for SoC
0016 peripherals.
0017 Each clock is assigned an identifier and client nodes can use this identifier
0018 to specify the clock which they consume. All available clocks are defined as
0019 preprocessor macros in the dt-bindings/clock/rv1108-cru.h headers and can be
0020 used in device tree sources. Similar macros exist for the reset sources in
0021 these files.
0022 There are several clocks that are generated outside the SoC. It is expected
0023 that they are defined using standard clock bindings with following
0024 clock-output-names:
0025 - "xin24m" - crystal input - required
0026 - "ext_vip" - external VIP clock - optional
0027 - "ext_i2s" - external I2S clock - optional
0028 - "ext_gmac" - external GMAC clock - optional
0029 - "hdmiphy" - external clock input derived from HDMI PHY - optional
0030 - "usbphy" - external clock input derived from USB PHY - optional
0031
0032 properties:
0033 compatible:
0034 enum:
0035 - rockchip,rv1108-cru
0036
0037 reg:
0038 maxItems: 1
0039
0040 "#clock-cells":
0041 const: 1
0042
0043 "#reset-cells":
0044 const: 1
0045
0046 clocks:
0047 maxItems: 1
0048
0049 clock-names:
0050 const: xin24m
0051
0052 rockchip,grf:
0053 $ref: /schemas/types.yaml#/definitions/phandle
0054 description:
0055 Phandle to the syscon managing the "general register files" (GRF),
0056 if missing pll rates are not changeable, due to the missing pll
0057 lock status.
0058
0059 required:
0060 - compatible
0061 - reg
0062 - "#clock-cells"
0063 - "#reset-cells"
0064
0065 additionalProperties: false
0066
0067 examples:
0068 - |
0069 cru: clock-controller@20200000 {
0070 compatible = "rockchip,rv1108-cru";
0071 reg = <0x20200000 0x1000>;
0072 rockchip,grf = <&grf>;
0073 #clock-cells = <1>;
0074 #reset-cells = <1>;
0075 };
