| # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/mmc/marvell,xenon-sdhci.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: Marvell Xenon SDHCI Controller |
| |
| description: | |
| This file documents differences between the core MMC properties described by |
| mmc-controller.yaml and the properties used by the Xenon implementation. |
| |
| Multiple SDHCs might be put into a single Xenon IP, to save size and cost. |
| Each SDHC is independent and owns independent resources, such as register |
| sets, clock and PHY. |
| |
| Each SDHC should have an independent device tree node. |
| |
| maintainers: |
| - Ulf Hansson <ulf.hansson@linaro.org> |
| |
| properties: |
| compatible: |
| oneOf: |
| - enum: |
| - marvell,armada-cp110-sdhci |
| - marvell,armada-ap806-sdhci |
| |
| - items: |
| - enum: |
| - marvell,armada-ap807-sdhci |
| - marvell,ac5-sdhci |
| - const: marvell,armada-ap806-sdhci |
| |
| - items: |
| - const: marvell,armada-3700-sdhci |
| - const: marvell,sdhci-xenon |
| |
| reg: |
| minItems: 1 |
| maxItems: 2 |
| description: | |
| For "marvell,armada-3700-sdhci", two register areas. The first one |
| for Xenon IP register. The second one for the Armada 3700 SoC PHY PAD |
| Voltage Control register. Please follow the examples with compatible |
| "marvell,armada-3700-sdhci" in below. |
| Please also check property marvell,pad-type in below. |
| |
| For other compatible strings, one register area for Xenon IP. |
| |
| clocks: |
| minItems: 1 |
| maxItems: 2 |
| |
| clock-names: |
| minItems: 1 |
| items: |
| - const: core |
| - const: axi |
| |
| interrupts: |
| maxItems: 1 |
| |
| marvell,xenon-sdhc-id: |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| minimum: 0 |
| maximum: 7 |
| description: | |
| Indicate the corresponding bit index of current SDHC in SDHC System |
| Operation Control Register Bit[7:0]. Set/clear the corresponding bit to |
| enable/disable current SDHC. |
| |
| marvell,xenon-phy-type: |
| $ref: /schemas/types.yaml#/definitions/string |
| enum: |
| - emmc 5.1 phy |
| - emmc 5.0 phy |
| description: | |
| Xenon support multiple types of PHYs. To select eMMC 5.1 PHY, set: |
| marvell,xenon-phy-type = "emmc 5.1 phy" eMMC 5.1 PHY is the default |
| choice if this property is not provided. To select eMMC 5.0 PHY, set: |
| marvell,xenon-phy-type = "emmc 5.0 phy" |
| |
| All those types of PHYs can support eMMC, SD and SDIO. Please note that |
| this property only presents the type of PHY. It doesn't stand for the |
| entire SDHC type or property. For example, "emmc 5.1 phy" doesn't mean |
| that this Xenon SDHC only supports eMMC 5.1. |
| |
| marvell,xenon-phy-znr: |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| minimum: 0 |
| maximum: 0x1f |
| default: 0xf |
| description: | |
| Set PHY ZNR value. |
| Only available for eMMC PHY. |
| |
| marvell,xenon-phy-zpr: |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| minimum: 0 |
| maximum: 0x1f |
| default: 0xf |
| description: | |
| Set PHY ZPR value. |
| Only available for eMMC PHY. |
| |
| marvell,xenon-phy-nr-success-tun: |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| minimum: 1 |
| maximum: 7 |
| default: 0x4 |
| description: | |
| Set the number of required consecutive successful sampling points |
| used to identify a valid sampling window, in tuning process. |
| |
| marvell,xenon-phy-tun-step-divider: |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| default: 64 |
| description: | |
| Set the divider for calculating TUN_STEP. |
| |
| marvell,xenon-phy-slow-mode: |
| type: boolean |
| description: | |
| If this property is selected, transfers will bypass PHY. |
| Only available when bus frequency lower than 55MHz in SDR mode. |
| Disabled by default. Please only try this property if timing issues |
| always occur with PHY enabled in eMMC HS SDR, SD SDR12, SD SDR25, |
| SD Default Speed and HS mode and eMMC legacy speed mode. |
| |
| marvell,xenon-tun-count: |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| default: 0x9 |
| description: | |
| Xenon SDHC SoC usually doesn't provide re-tuning counter in |
| Capabilities Register 3 Bit[11:8]. |
| This property provides the re-tuning counter. |
| |
| allOf: |
| - $ref: mmc-controller.yaml# |
| - if: |
| properties: |
| compatible: |
| contains: |
| const: marvell,armada-3700-sdhci |
| |
| then: |
| properties: |
| reg: |
| items: |
| - description: Xenon IP registers |
| - description: Armada 3700 SoC PHY PAD Voltage Control register |
| |
| marvell,pad-type: |
| $ref: /schemas/types.yaml#/definitions/string |
| enum: |
| - sd |
| - fixed-1-8v |
| description: | |
| Type of Armada 3700 SoC PHY PAD Voltage Controller register. |
| If "sd" is selected, SoC PHY PAD is set as 3.3V at the beginning |
| and is switched to 1.8V when later in higher speed mode. |
| If "fixed-1-8v" is selected, SoC PHY PAD is fixed 1.8V, such as for |
| eMMC. |
| Please follow the examples with compatible |
| "marvell,armada-3700-sdhci" in below. |
| |
| required: |
| - marvell,pad-type |
| |
| - if: |
| properties: |
| compatible: |
| contains: |
| enum: |
| - marvell,armada-cp110-sdhci |
| - marvell,armada-ap807-sdhci |
| - marvell,armada-ap806-sdhci |
| |
| then: |
| properties: |
| clocks: |
| minItems: 2 |
| |
| clock-names: |
| items: |
| - const: core |
| - const: axi |
| |
| |
| required: |
| - compatible |
| - reg |
| - clocks |
| - clock-names |
| |
| unevaluatedProperties: false |
| |
| examples: |
| - | |
| // For eMMC |
| #include <dt-bindings/interrupt-controller/arm-gic.h> |
| #include <dt-bindings/interrupt-controller/irq.h> |
| |
| mmc@aa0000 { |
| compatible = "marvell,armada-ap807-sdhci", "marvell,armada-ap806-sdhci"; |
| reg = <0xaa0000 0x1000>; |
| interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>; |
| clocks = <&emmc_clk 0>, <&axi_clk 0>; |
| clock-names = "core", "axi"; |
| bus-width = <4>; |
| marvell,xenon-phy-slow-mode; |
| marvell,xenon-tun-count = <11>; |
| non-removable; |
| no-sd; |
| no-sdio; |
| |
| /* Vmmc and Vqmmc are both fixed */ |
| }; |
| |
| - | |
| // For SD/SDIO |
| #include <dt-bindings/interrupt-controller/arm-gic.h> |
| #include <dt-bindings/interrupt-controller/irq.h> |
| |
| mmc@ab0000 { |
| compatible = "marvell,armada-cp110-sdhci"; |
| reg = <0xab0000 0x1000>; |
| interrupts = <GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>; |
| vqmmc-supply = <&sd_vqmmc_regulator>; |
| vmmc-supply = <&sd_vmmc_regulator>; |
| clocks = <&sdclk 0>, <&axi_clk 0>; |
| clock-names = "core", "axi"; |
| bus-width = <4>; |
| marvell,xenon-tun-count = <9>; |
| }; |
| |
| - | |
| // For eMMC with compatible "marvell,armada-3700-sdhci": |
| #include <dt-bindings/interrupt-controller/arm-gic.h> |
| #include <dt-bindings/interrupt-controller/irq.h> |
| |
| mmc@aa0000 { |
| compatible = "marvell,armada-3700-sdhci", "marvell,sdhci-xenon"; |
| reg = <0xaa0000 0x1000>, |
| <0x17808 0x4>; |
| interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>; |
| clocks = <&emmcclk 0>; |
| clock-names = "core"; |
| bus-width = <8>; |
| mmc-ddr-1_8v; |
| mmc-hs400-1_8v; |
| non-removable; |
| no-sd; |
| no-sdio; |
| |
| /* Vmmc and Vqmmc are both fixed */ |
| |
| marvell,pad-type = "fixed-1-8v"; |
| }; |
| |
| - | |
| // For SD/SDIO with compatible "marvell,armada-3700-sdhci": |
| #include <dt-bindings/interrupt-controller/arm-gic.h> |
| #include <dt-bindings/interrupt-controller/irq.h> |
| |
| mmc@ab0000 { |
| compatible = "marvell,armada-3700-sdhci", "marvell,sdhci-xenon"; |
| reg = <0xab0000 0x1000>, |
| <0x17808 0x4>; |
| interrupts = <GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>; |
| vqmmc-supply = <&sd_regulator>; |
| /* Vmmc is fixed */ |
| clocks = <&sdclk 0>; |
| clock-names = "core"; |
| bus-width = <4>; |
| |
| marvell,pad-type = "sd"; |
| }; |
