| * Freescale Enhanced Secure Digital Host Controller (eSDHC) |
| |
| The Enhanced Secure Digital Host Controller provides an interface |
| for MMC, SD, and SDIO types of memory cards. |
| |
| This file documents differences between the core properties described |
| by mmc.txt and the properties used by the sdhci-esdhc driver. |
| |
| Required properties: |
| - interrupt-parent : interrupt source phandle. |
| - clock-frequency : specifies eSDHC base clock frequency. |
| |
| Optional properties: |
| - sdhci,wp-inverted : specifies that eSDHC controller reports |
| inverted write-protect state; New devices should use the generic |
| "wp-inverted" property. |
| - sdhci,1-bit-only : specifies that a controller can only handle |
| 1-bit data transfers. New devices should use the generic |
| "bus-width = <1>" property. |
| - sdhci,auto-cmd12: specifies that a controller can only handle auto |
| CMD12. |
| - voltage-ranges : two cells are required, first cell specifies minimum |
| slot voltage (mV), second cell specifies maximum slot voltage (mV). |
| Several ranges could be specified. |
| |
| Example: |
| |
| sdhci@2e000 { |
| compatible = "fsl,mpc8378-esdhc", "fsl,esdhc"; |
| reg = <0x2e000 0x1000>; |
| interrupts = <42 0x8>; |
| interrupt-parent = <&ipic>; |
| /* Filled in by U-Boot */ |
| clock-frequency = <0>; |
| voltage-ranges = <3300 3300>; |
| }; |
