| Tom Rini | 6b642ac | 2024-10-01 12:20:28 -0600 | [diff] [blame] | 1 | # SPDX-License-Identifier: GPL-2.0-only |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/phy/rockchip,rk3399-emmc-phy.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Rockchip EMMC PHY |
| 8 | |
| 9 | maintainers: |
| 10 | - Heiko Stuebner <heiko@sntech.de> |
| 11 | |
| 12 | properties: |
| 13 | compatible: |
| 14 | const: rockchip,rk3399-emmc-phy |
| 15 | |
| 16 | reg: |
| 17 | maxItems: 1 |
| 18 | |
| 19 | clocks: |
| 20 | maxItems: 1 |
| 21 | |
| 22 | clock-names: |
| 23 | const: emmcclk |
| 24 | |
| 25 | drive-impedance-ohm: |
| 26 | $ref: /schemas/types.yaml#/definitions/uint32 |
| 27 | description: |
| 28 | Specifies the drive impedance in Ohm. |
| 29 | enum: [33, 40, 50, 66, 100] |
| 30 | default: 50 |
| 31 | |
| 32 | rockchip,enable-strobe-pulldown: |
| 33 | type: boolean |
| 34 | description: | |
| 35 | Enable internal pull-down for the strobe |
| 36 | line. If not set, pull-down is not used. |
| 37 | |
| 38 | rockchip,output-tapdelay-select: |
| 39 | $ref: /schemas/types.yaml#/definitions/uint32 |
| 40 | description: |
| 41 | Specifies the phyctrl_otapdlysec register. |
| 42 | default: 0x4 |
| 43 | maximum: 0xf |
| 44 | |
| 45 | "#phy-cells": |
| 46 | const: 0 |
| 47 | |
| 48 | required: |
| 49 | - compatible |
| 50 | - reg |
| 51 | - "#phy-cells" |
| 52 | |
| 53 | additionalProperties: false |
| 54 | |
| 55 | examples: |
| 56 | - | |
| 57 | phy@f780 { |
| 58 | compatible = "rockchip,rk3399-emmc-phy"; |
| 59 | reg = <0xf780 0x20>; |
| 60 | clocks = <&sdhci>; |
| 61 | clock-names = "emmcclk"; |
| 62 | drive-impedance-ohm = <50>; |
| 63 | #phy-cells = <0>; |
| 64 | }; |