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# SPDX-License-Identifier: (GPL-2.0+ OR MIT)
%YAML 1.2
---
$id: http://devicetree.org/schemas/clock/rockchip,rk3399-cru.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Rockchip RK3399 Clock and Reset Unit
maintainers:
- Elaine Zhang <zhangqing@rock-chips.com>
- Heiko Stuebner <heiko@sntech.de>
description: |
The RK3399 clock controller generates and supplies clock to various
controllers within the SoC and also implements a reset controller for SoC
peripherals.
Each clock is assigned an identifier and client nodes can use this identifier
to specify the clock which they consume. All available clocks are defined as
preprocessor macros in the dt-bindings/clock/rk3399-cru.h headers and can be
used in device tree sources. Similar macros exist for the reset sources in
these files.
There are several clocks that are generated outside the SoC. It is expected
that they are defined using standard clock bindings with following
clock-output-names:
- "xin24m" - crystal input - required,
- "xin32k" - rtc clock - optional,
- "clkin_gmac" - external GMAC clock - optional,
- "clkin_i2s" - external I2S clock - optional,
- "pclkin_cif" - external ISP clock - optional,
- "clk_usbphy0_480m" - output clock of the pll in the usbphy0
- "clk_usbphy1_480m" - output clock of the pll in the usbphy1
properties:
compatible:
enum:
- rockchip,rk3399-pmucru
- rockchip,rk3399-cru
reg:
maxItems: 1
"#clock-cells":
const: 1
"#reset-cells":
const: 1
clocks:
maxItems: 1
clock-names:
const: xin24m
rockchip,grf:
$ref: /schemas/types.yaml#/definitions/phandle
description:
Phandle to the syscon managing the "general register files". It is used
for GRF muxes, if missing any muxes present in the GRF will not be
available.
required:
- compatible
- reg
- "#clock-cells"
- "#reset-cells"
additionalProperties: false
examples:
- |
pmucru: clock-controller@ff750000 {
compatible = "rockchip,rk3399-pmucru";
reg = <0xff750000 0x1000>;
#clock-cells = <1>;
#reset-cells = <1>;
};
- |
cru: clock-controller@ff760000 {
compatible = "rockchip,rk3399-cru";
reg = <0xff760000 0x1000>;
#clock-cells = <1>;
#reset-cells = <1>;
};
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