|
| 1 | +# SPDX-License-Identifier: GPL-2.0 |
| 2 | +%YAML 1.2 |
| 3 | +--- |
| 4 | +$id: http://devicetree.org/schemas/clock/rockchip,rk3328-cru.yaml# |
| 5 | +$schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | + |
| 7 | +title: Rockchip RK3328 Clock and Reset Unit (CRU) |
| 8 | + |
| 9 | +maintainers: |
| 10 | + - Elaine Zhang <zhangqing@rock-chips.com> |
| 11 | + - Heiko Stuebner <heiko@sntech.de> |
| 12 | + |
| 13 | +description: | |
| 14 | + The RK3328 clock controller generates and supplies clocks to various |
| 15 | + controllers within the SoC and also implements a reset controller for SoC |
| 16 | + peripherals. |
| 17 | + Each clock is assigned an identifier and client nodes can use this identifier |
| 18 | + to specify the clock which they consume. All available clocks are defined as |
| 19 | + preprocessor macros in the dt-bindings/clock/rk3328-cru.h headers and can be |
| 20 | + used in device tree sources. Similar macros exist for the reset sources in |
| 21 | + these files. |
| 22 | + There are several clocks that are generated outside the SoC. It is expected |
| 23 | + that they are defined using standard clock bindings with following |
| 24 | + clock-output-names: |
| 25 | + - "xin24m" - crystal input - required, |
| 26 | + - "clkin_i2s" - external I2S clock - optional, |
| 27 | + - "gmac_clkin" - external GMAC clock - optional |
| 28 | + - "phy_50m_out" - output clock of the pll in the mac phy |
| 29 | + - "hdmi_phy" - output clock of the hdmi phy pll - optional |
| 30 | +
|
| 31 | +properties: |
| 32 | + compatible: |
| 33 | + enum: |
| 34 | + - rockchip,rk3328-cru |
| 35 | + |
| 36 | + reg: |
| 37 | + maxItems: 1 |
| 38 | + |
| 39 | + "#clock-cells": |
| 40 | + const: 1 |
| 41 | + |
| 42 | + "#reset-cells": |
| 43 | + const: 1 |
| 44 | + |
| 45 | + clocks: |
| 46 | + maxItems: 1 |
| 47 | + |
| 48 | + clock-names: |
| 49 | + const: xin24m |
| 50 | + |
| 51 | + rockchip,grf: |
| 52 | + $ref: /schemas/types.yaml#/definitions/phandle |
| 53 | + description: |
| 54 | + Phandle to the syscon managing the "general register files" (GRF), |
| 55 | + if missing pll rates are not changeable, due to the missing pll |
| 56 | + lock status. |
| 57 | + |
| 58 | +required: |
| 59 | + - compatible |
| 60 | + - reg |
| 61 | + - "#clock-cells" |
| 62 | + - "#reset-cells" |
| 63 | + |
| 64 | +additionalProperties: false |
| 65 | + |
| 66 | +examples: |
| 67 | + - | |
| 68 | + cru: clock-controller@ff440000 { |
| 69 | + compatible = "rockchip,rk3328-cru"; |
| 70 | + reg = <0xff440000 0x1000>; |
| 71 | + rockchip,grf = <&grf>; |
| 72 | + #clock-cells = <1>; |
| 73 | + #reset-cells = <1>; |
| 74 | + }; |
0 commit comments