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110 lines
3.6 KiB
110 lines
3.6 KiB
* STMicroelectronics sdhci-st MMC/SD controller |
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This file documents the differences between the core properties in |
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Documentation/devicetree/bindings/mmc/mmc.txt and the properties |
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used by the sdhci-st driver. |
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Required properties: |
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- compatible: Must be "st,sdhci" and it can be compatible to "st,sdhci-stih407" |
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to set the internal glue logic used for configuring the MMC |
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subsystem (mmcss) inside the FlashSS (available in STiH407 SoC |
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family). |
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- clock-names: Should be "mmc" and "icn". (NB: The latter is not compulsory) |
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See: Documentation/devicetree/bindings/resource-names.txt |
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- clocks: Phandle to the clock. |
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See: Documentation/devicetree/bindings/clock/clock-bindings.txt |
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- interrupts: One mmc interrupt should be described here. |
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- interrupt-names: Should be "mmcirq". |
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- pinctrl-names: A pinctrl state names "default" must be defined. |
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- pinctrl-0: Phandle referencing pin configuration of the sd/emmc controller. |
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See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt |
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- reg: This must provide the host controller base address and it can also |
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contain the FlashSS Top register for TX/RX delay used by the driver |
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to configure DLL inside the flashSS, if so reg-names must also be |
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specified. |
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Optional properties: |
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- reg-names: Should be "mmc" and "top-mmc-delay". "top-mmc-delay" is optional |
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for eMMC on stih407 family silicon to configure DLL inside FlashSS. |
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- non-removable: Non-removable slot. Also used for configuring mmcss in STiH407 SoC |
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family. |
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See: Documentation/devicetree/bindings/mmc/mmc.txt. |
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- bus-width: Number of data lines. |
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See: Documentation/devicetree/bindings/mmc/mmc.txt. |
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- max-frequency: Can be 200MHz, 100MHz or 50MHz (default) and used for |
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configuring the CCONFIG3 in the mmcss. |
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See: Documentation/devicetree/bindings/mmc/mmc.txt. |
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- resets: Phandle and reset specifier pair to softreset line of HC IP. |
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See: Documentation/devicetree/bindings/reset/reset.txt |
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- vqmmc-supply: Phandle to the regulator dt node, mentioned as the vcc/vdd |
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supply in eMMC/SD specs. |
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- sd-uhs-sdr50: To enable the SDR50 in the mmcss. |
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See: Documentation/devicetree/bindings/mmc/mmc.txt. |
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- sd-uhs-sdr104: To enable the SDR104 in the mmcss. |
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See: Documentation/devicetree/bindings/mmc/mmc.txt. |
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- sd-uhs-ddr50: To enable the DDR50 in the mmcss. |
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See: Documentation/devicetree/bindings/mmc/mmc.txt. |
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Example: |
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/* Example stih416e eMMC configuration */ |
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mmc0: sdhci@fe81e000 { |
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compatible = "st,sdhci"; |
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reg = <0xfe81e000 0x1000>; |
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interrupts = <GIC_SPI 127 IRQ_TYPE_NONE>; |
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interrupt-names = "mmcirq"; |
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pinctrl-names = "default"; |
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pinctrl-0 = <&pinctrl_mmc0>; |
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clock-names = "mmc"; |
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clocks = <&clk_s_a1_ls 1>; |
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bus-width = <8> |
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/* Example SD stih407 family configuration */ |
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mmc1: sdhci@9080000 { |
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compatible = "st,sdhci-stih407", "st,sdhci"; |
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reg = <0x09080000 0x7ff>; |
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reg-names = "mmc"; |
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interrupts = <GIC_SPI 90 IRQ_TYPE_NONE>; |
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interrupt-names = "mmcirq"; |
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pinctrl-names = "default"; |
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pinctrl-0 = <&pinctrl_sd1>; |
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clock-names = "mmc"; |
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clocks = <&clk_s_c0_flexgen CLK_MMC_1>; |
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resets = <&softreset STIH407_MMC1_SOFTRESET>; |
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bus-width = <4>; |
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}; |
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/* Example eMMC stih407 family configuration */ |
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mmc0: sdhci@9060000 { |
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compatible = "st,sdhci-stih407", "st,sdhci"; |
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reg = <0x09060000 0x7ff>, <0x9061008 0x20>; |
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reg-names = "mmc", "top-mmc-delay"; |
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interrupts = <GIC_SPI 92 IRQ_TYPE_NONE>; |
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interrupt-names = "mmcirq"; |
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pinctrl-names = "default"; |
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pinctrl-0 = <&pinctrl_mmc0>; |
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clock-names = "mmc"; |
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clocks = <&clk_s_c0_flexgen CLK_MMC_0>; |
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vqmmc-supply = <&vmmc_reg>; |
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max-frequency = <200000000>; |
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bus-width = <8>; |
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non-removable; |
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sd-uhs-sdr50; |
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sd-uhs-sdr104; |
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sd-uhs-ddr50; |
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};
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