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125 lines
3.6 KiB
125 lines
3.6 KiB
# SPDX-License-Identifier: GPL-2.0 |
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%YAML 1.2 |
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--- |
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$id: http://devicetree.org/schemas/mmc/rockchip-dw-mshc.yaml# |
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$schema: http://devicetree.org/meta-schemas/core.yaml# |
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title: Rockchip designware mobile storage host controller device tree bindings |
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description: |
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Rockchip uses the Synopsys designware mobile storage host controller |
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to interface a SoC with storage medium such as eMMC or SD/MMC cards. |
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This file documents the combined properties for the core Synopsys dw mshc |
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controller that are not already included in the synopsys-dw-mshc-common.yaml |
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file and the Rockchip specific extensions. |
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allOf: |
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- $ref: "synopsys-dw-mshc-common.yaml#" |
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maintainers: |
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- Heiko Stuebner <[email protected]> |
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# Everything else is described in the common file |
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properties: |
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compatible: |
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oneOf: |
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# for Rockchip RK2928 and before RK3288 |
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- const: rockchip,rk2928-dw-mshc |
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# for Rockchip RK3288 |
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- const: rockchip,rk3288-dw-mshc |
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- items: |
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- enum: |
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# for Rockchip PX30 |
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- rockchip,px30-dw-mshc |
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# for Rockchip RK3036 |
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- rockchip,rk3036-dw-mshc |
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# for Rockchip RK322x |
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- rockchip,rk3228-dw-mshc |
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# for Rockchip RK3308 |
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- rockchip,rk3308-dw-mshc |
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# for Rockchip RK3328 |
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- rockchip,rk3328-dw-mshc |
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# for Rockchip RK3368 |
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- rockchip,rk3368-dw-mshc |
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# for Rockchip RK3399 |
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- rockchip,rk3399-dw-mshc |
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# for Rockchip RV1108 |
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- rockchip,rv1108-dw-mshc |
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- const: rockchip,rk3288-dw-mshc |
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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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clocks: |
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minItems: 2 |
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maxItems: 4 |
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description: |
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Handle to "biu" and "ciu" clocks for the bus interface unit clock and |
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the card interface unit clock. If "ciu-drive" and "ciu-sample" are |
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specified in clock-names, it should also contain |
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handles to these clocks. |
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clock-names: |
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minItems: 2 |
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items: |
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- const: biu |
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- const: ciu |
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- const: ciu-drive |
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- const: ciu-sample |
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description: |
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Apart from the clock-names "biu" and "ciu" two more clocks |
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"ciu-drive" and "ciu-sample" are supported. They are used |
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to control the clock phases, "ciu-sample" is required for tuning |
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high speed modes. |
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rockchip,default-sample-phase: |
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$ref: /schemas/types.yaml#/definitions/uint32 |
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minimum: 0 |
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maximum: 360 |
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default: 0 |
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description: |
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The default phase to set "ciu-sample" at probing, |
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low speeds or in case where all phases work at tuning time. |
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If not specified 0 deg will be used. |
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rockchip,desired-num-phases: |
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$ref: /schemas/types.yaml#/definitions/uint32 |
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minimum: 0 |
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maximum: 360 |
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default: 360 |
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description: |
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The desired number of times that the host execute tuning when needed. |
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If not specified, the host will do tuning for 360 times, |
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namely tuning for each degree. |
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required: |
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- compatible |
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- reg |
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- interrupts |
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- clocks |
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- clock-names |
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unevaluatedProperties: false |
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examples: |
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- | |
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#include <dt-bindings/clock/rk3288-cru.h> |
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#include <dt-bindings/interrupt-controller/arm-gic.h> |
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#include <dt-bindings/interrupt-controller/irq.h> |
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sdmmc: mmc@ff0c0000 { |
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compatible = "rockchip,rk3288-dw-mshc"; |
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reg = <0xff0c0000 0x4000>; |
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interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>; |
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clocks = <&cru HCLK_SDMMC>, <&cru SCLK_SDMMC>, |
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<&cru SCLK_SDMMC_DRV>, <&cru SCLK_SDMMC_SAMPLE>; |
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clock-names = "biu", "ciu", "ciu-drive", "ciu-sample"; |
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resets = <&cru SRST_MMC0>; |
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reset-names = "reset"; |
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fifo-depth = <0x100>; |
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max-frequency = <150000000>; |
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}; |
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...
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