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188 lines
5.3 KiB
188 lines
5.3 KiB
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
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%YAML 1.2 |
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--- |
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$id: http://devicetree.org/schemas/mmc/fsl-imx-esdhc.yaml# |
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$schema: http://devicetree.org/meta-schemas/core.yaml# |
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title: Freescale Enhanced Secure Digital Host Controller (eSDHC) for i.MX |
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maintainers: |
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- Shawn Guo <[email protected]> |
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allOf: |
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- $ref: "mmc-controller.yaml" |
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description: | |
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The Enhanced Secure Digital Host Controller on Freescale i.MX family |
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provides an interface for MMC, SD, and SDIO types of memory cards. |
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This file documents differences between the core properties described |
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by mmc.txt and the properties used by the sdhci-esdhc-imx driver. |
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properties: |
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compatible: |
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oneOf: |
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- enum: |
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- fsl,imx25-esdhc |
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- fsl,imx35-esdhc |
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- fsl,imx51-esdhc |
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- fsl,imx53-esdhc |
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- fsl,imx6q-usdhc |
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- fsl,imx6sl-usdhc |
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- fsl,imx6sll-usdhc |
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- fsl,imx6sx-usdhc |
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- fsl,imx6ull-usdhc |
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- fsl,imx7d-usdhc |
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- fsl,imx7ulp-usdhc |
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- fsl,imx8mm-usdhc |
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- fsl,imxrt1050-usdhc |
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- nxp,s32g2-usdhc |
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- items: |
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- enum: |
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- fsl,imx8mq-usdhc |
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- const: fsl,imx7d-usdhc |
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- items: |
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- enum: |
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- fsl,imx8mn-usdhc |
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- fsl,imx8mp-usdhc |
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- fsl,imx93-usdhc |
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- fsl,imx8ulp-usdhc |
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- const: fsl,imx8mm-usdhc |
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- items: |
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- enum: |
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- fsl,imx8qm-usdhc |
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- const: fsl,imx8qxp-usdhc |
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- items: |
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- enum: |
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- fsl,imx8dxl-usdhc |
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- fsl,imx8mm-usdhc |
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- fsl,imx8mn-usdhc |
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- fsl,imx8mp-usdhc |
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- fsl,imx8qm-usdhc |
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- fsl,imx8qxp-usdhc |
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- const: fsl,imx7d-usdhc |
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deprecated: true |
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- items: |
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- enum: |
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- fsl,imx8mn-usdhc |
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- fsl,imx8mp-usdhc |
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- const: fsl,imx8mm-usdhc |
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- const: fsl,imx7d-usdhc |
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deprecated: true |
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- items: |
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- enum: |
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- fsl,imx8qm-usdhc |
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- const: fsl,imx8qxp-usdhc |
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- const: fsl,imx7d-usdhc |
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deprecated: true |
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reg: |
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maxItems: 1 |
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interrupts: |
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maxItems: 1 |
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fsl,wp-controller: |
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description: | |
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boolean, if present, indicate to use controller internal write protection. |
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type: boolean |
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fsl,delay-line: |
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$ref: /schemas/types.yaml#/definitions/uint32 |
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description: | |
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Specify the number of delay cells for override mode. |
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This is used to set the clock delay for DLL(Delay Line) on override mode |
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to select a proper data sampling window in case the clock quality is not good |
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due to signal path is too long on the board. Please refer to eSDHC/uSDHC |
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chapter, DLL (Delay Line) section in RM for details. |
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default: 0 |
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voltage-ranges: |
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$ref: '/schemas/types.yaml#/definitions/uint32-matrix' |
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description: | |
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Specify the voltage range in case there are software transparent level |
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shifters on the outputs of the controller. Two cells are required, first |
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cell specifies minimum slot voltage (mV), second cell specifies maximum |
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slot voltage (mV). |
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items: |
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items: |
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- description: value for minimum slot voltage |
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- description: value for maximum slot voltage |
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maxItems: 1 |
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fsl,tuning-start-tap: |
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$ref: /schemas/types.yaml#/definitions/uint32 |
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description: | |
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Specify the start delay cell point when send first CMD19 in tuning procedure. |
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default: 0 |
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fsl,tuning-step: |
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$ref: /schemas/types.yaml#/definitions/uint32 |
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description: | |
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Specify the increasing delay cell steps in tuning procedure. |
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The uSDHC use one delay cell as default increasing step to do tuning process. |
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This property allows user to change the tuning step to more than one delay |
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cells which is useful for some special boards or cards when the default |
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tuning step can't find the proper delay window within limited tuning retries. |
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default: 0 |
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fsl,strobe-dll-delay-target: |
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$ref: /schemas/types.yaml#/definitions/uint32 |
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description: | |
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Specify the strobe dll control slave delay target. |
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This delay target programming host controller loopback read clock, and this |
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property allows user to change the delay target for the strobe input read clock. |
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If not use this property, driver default set the delay target to value 7. |
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Only eMMC HS400 mode need to take care of this property. |
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default: 0 |
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clocks: |
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maxItems: 3 |
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description: |
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Handle clocks for the sdhc controller. |
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clock-names: |
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items: |
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- const: ipg |
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- const: ahb |
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- const: per |
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power-domains: |
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maxItems: 1 |
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pinctrl-names: |
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oneOf: |
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- minItems: 3 |
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items: |
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- const: default |
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- const: state_100mhz |
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- const: state_200mhz |
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- const: sleep |
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- minItems: 1 |
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items: |
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- const: default |
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- const: sleep |
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required: |
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- compatible |
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- reg |
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- interrupts |
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unevaluatedProperties: false |
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examples: |
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- | |
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mmc@70004000 { |
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compatible = "fsl,imx51-esdhc"; |
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reg = <0x70004000 0x4000>; |
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interrupts = <1>; |
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fsl,wp-controller; |
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}; |
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mmc@70008000 { |
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compatible = "fsl,imx51-esdhc"; |
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reg = <0x70008000 0x4000>; |
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interrupts = <2>; |
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cd-gpios = <&gpio1 6 0>; /* GPIO1_6 */ |
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wp-gpios = <&gpio1 5 0>; /* GPIO1_5 */ |
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};
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