0001 # SPDX-License-Identifier: GPL-2.0-only
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/clock/rockchip,rk3399-cru.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: Rockchip RK3399 Clock and Reset Unit
0008
0009 maintainers:
0010 - Elaine Zhang <zhangqing@rock-chips.com>
0011 - Heiko Stuebner <heiko@sntech.de>
0012
0013 description: |
0014 The RK3399 clock controller generates and supplies clock 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/rk3399-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 - "xin32k" - rtc clock - optional,
0027 - "clkin_gmac" - external GMAC clock - optional,
0028 - "clkin_i2s" - external I2S clock - optional,
0029 - "pclkin_cif" - external ISP clock - optional,
0030 - "clk_usbphy0_480m" - output clock of the pll in the usbphy0
0031 - "clk_usbphy1_480m" - output clock of the pll in the usbphy1
0032
0033 properties:
0034 compatible:
0035 enum:
0036 - rockchip,rk3399-pmucru
0037 - rockchip,rk3399-cru
0038
0039 reg:
0040 maxItems: 1
0041
0042 "#clock-cells":
0043 const: 1
0044
0045 "#reset-cells":
0046 const: 1
0047
0048 clocks:
0049 maxItems: 1
0050
0051 clock-names:
0052 const: xin24m
0053
0054 rockchip,grf:
0055 $ref: /schemas/types.yaml#/definitions/phandle
0056 description:
0057 Phandle to the syscon managing the "general register files". It is used
0058 for GRF muxes, if missing any muxes present in the GRF will not be
0059 available.
0060
0061 required:
0062 - compatible
0063 - reg
0064 - "#clock-cells"
0065 - "#reset-cells"
0066
0067 additionalProperties: false
0068
0069 examples:
0070 - |
0071 pmucru: clock-controller@ff750000 {
0072 compatible = "rockchip,rk3399-pmucru";
0073 reg = <0xff750000 0x1000>;
0074 #clock-cells = <1>;
0075 #reset-cells = <1>;
0076 };
0077 - |
0078 cru: clock-controller@ff760000 {
0079 compatible = "rockchip,rk3399-cru";
0080 reg = <0xff760000 0x1000>;
0081 #clock-cells = <1>;
0082 #reset-cells = <1>;
0083 };
