| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/clock/ti,cdce925.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: TI CDCE913/925/937/949 programmable I2C clock synthesizers |
| 8 | |
| 9 | maintainers: |
| 10 | - Alexander Stein <alexander.stein@ew.tq-group.com> |
| 11 | |
| 12 | description: | |
| 13 | Flexible Low Power LVCMOS Clock Generator with SSC Support for EMI Reduction |
| 14 | |
| 15 | - CDCE(L)913: 1-PLL, 3 Outputs https://www.ti.com/product/cdce913 |
| 16 | - CDCE(L)925: 2-PLL, 5 Outputs https://www.ti.com/product/cdce925 |
| 17 | - CDCE(L)937: 3-PLL, 7 Outputs https://www.ti.com/product/cdce937 |
| 18 | - CDCE(L)949: 4-PLL, 9 Outputs https://www.ti.com/product/cdce949 |
| 19 | |
| 20 | properties: |
| 21 | compatible: |
| 22 | enum: |
| 23 | - ti,cdce913 |
| 24 | - ti,cdce925 |
| 25 | - ti,cdce937 |
| 26 | - ti,cdce949 |
| 27 | |
| 28 | reg: |
| 29 | maxItems: 1 |
| 30 | |
| 31 | clocks: |
| 32 | items: |
| 33 | - description: fixed parent clock |
| 34 | |
| 35 | "#clock-cells": |
| 36 | const: 1 |
| 37 | |
| 38 | vdd-supply: |
| 39 | description: Regulator that provides 1.8V Vdd power supply |
| 40 | |
| 41 | vddout-supply: |
| 42 | description: | |
| 43 | Regulator that provides Vddout power supply. |
| 44 | non-L variant: 2.5V or 3.3V for |
| 45 | L variant: 1.8V for |
| 46 | |
| 47 | xtal-load-pf: |
| 48 | $ref: /schemas/types.yaml#/definitions/uint32 |
| 49 | description: | |
| 50 | Crystal load-capacitor value to fine-tune performance on a |
| 51 | board, or to compensate for external influences. |
| 52 | |
| 53 | patternProperties: |
| 54 | "^PLL[1-4]$": |
| 55 | type: object |
| 56 | description: | |
| 57 | optional child node can be used to specify spread |
| 58 | spectrum clocking parameters for a board |
| 59 | |
| 60 | additionalProperties: false |
| 61 | |
| 62 | properties: |
| 63 | spread-spectrum: |
| 64 | $ref: /schemas/types.yaml#/definitions/uint32 |
| 65 | description: SSC mode as defined in the data sheet |
| 66 | |
| 67 | spread-spectrum-center: |
| 68 | type: boolean |
| 69 | description: | |
| 70 | Use "centered" mode instead of "max" mode. When |
| 71 | present, the clock runs at the requested frequency on average. |
| 72 | Otherwise the requested frequency is the maximum value of the |
| 73 | SCC range. |
| 74 | |
| 75 | required: |
| 76 | - compatible |
| 77 | - reg |
| 78 | - clocks |
| 79 | - "#clock-cells" |
| 80 | |
| 81 | additionalProperties: false |
| 82 | |
| 83 | examples: |
| 84 | - | |
| 85 | i2c { |
| 86 | #address-cells = <1>; |
| 87 | #size-cells = <0>; |
| 88 | |
| 89 | cdce925: clock-controller@64 { |
| 90 | compatible = "ti,cdce925"; |
| 91 | reg = <0x64>; |
| 92 | clocks = <&xtal_27Mhz>; |
| 93 | #clock-cells = <1>; |
| 94 | xtal-load-pf = <5>; |
| 95 | vdd-supply = <®_1v8>; |
| 96 | vddout-supply = <®_3v3>; |
| 97 | /* PLL options to get SSC 1% centered */ |
| 98 | PLL2 { |
| 99 | spread-spectrum = <4>; |
| 100 | spread-spectrum-center; |
| 101 | }; |
| 102 | }; |
| 103 | }; |