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52 lines
1.7 KiB
52 lines
1.7 KiB
* Freescale Enhanced Secure Digital Host Controller (eSDHC) |
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The Enhanced Secure Digital Host Controller provides an interface |
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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 driver. |
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Required properties: |
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- compatible : should be "fsl,esdhc", or "fsl,<chip>-esdhc". |
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Possible compatibles for PowerPC: |
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"fsl,mpc8536-esdhc" |
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"fsl,mpc8378-esdhc" |
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"fsl,p2020-esdhc" |
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"fsl,p4080-esdhc" |
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"fsl,t1040-esdhc" |
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"fsl,t4240-esdhc" |
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Possible compatibles for ARM: |
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"fsl,ls1012a-esdhc" |
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"fsl,ls1028a-esdhc" |
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"fsl,ls1088a-esdhc" |
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"fsl,ls1043a-esdhc" |
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"fsl,ls1046a-esdhc" |
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"fsl,ls2080a-esdhc" |
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- clock-frequency : specifies eSDHC base clock frequency. |
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Optional properties: |
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- sdhci,wp-inverted : specifies that eSDHC controller reports |
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inverted write-protect state; New devices should use the generic |
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"wp-inverted" property. |
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- sdhci,1-bit-only : specifies that a controller can only handle |
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1-bit data transfers. New devices should use the generic |
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"bus-width = <1>" property. |
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- sdhci,auto-cmd12: specifies that a controller can only handle auto |
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CMD12. |
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- voltage-ranges : two cells are required, first cell specifies minimum |
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slot voltage (mV), second cell specifies maximum slot voltage (mV). |
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Several ranges could be specified. |
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- little-endian : If the host controller is little-endian mode, specify |
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this property. The default endian mode is big-endian. |
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Example: |
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sdhci@2e000 { |
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compatible = "fsl,mpc8378-esdhc", "fsl,esdhc"; |
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reg = <0x2e000 0x1000>; |
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interrupts = <42 0x8>; |
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interrupt-parent = <&ipic>; |
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/* Filled in by U-Boot */ |
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clock-frequency = <0>; |
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voltage-ranges = <3300 3300>; |
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};
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