| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | * Freescale Enhanced Secure Digital Host Controller (eSDHC) |
| 2 | |
| 3 | The Enhanced Secure Digital Host Controller provides an interface |
| 4 | for MMC, SD, and SDIO types of memory cards. |
| 5 | |
| 6 | This file documents differences between the core properties described |
| 7 | by mmc.txt and the properties used by the sdhci-esdhc driver. |
| 8 | |
| 9 | Required properties: |
| 10 | - compatible : should be "fsl,esdhc", or "fsl,<chip>-esdhc". |
| 11 | Possible compatibles for PowerPC: |
| 12 | "fsl,mpc8536-esdhc" |
| 13 | "fsl,mpc8378-esdhc" |
| 14 | "fsl,p2020-esdhc" |
| 15 | "fsl,p4080-esdhc" |
| 16 | "fsl,t1040-esdhc" |
| 17 | "fsl,t4240-esdhc" |
| 18 | Possible compatibles for ARM: |
| 19 | "fsl,ls1012a-esdhc" |
| 20 | "fsl,ls1028a-esdhc" |
| 21 | "fsl,ls1088a-esdhc" |
| 22 | "fsl,ls1043a-esdhc" |
| 23 | "fsl,ls1046a-esdhc" |
| 24 | "fsl,ls2080a-esdhc" |
| 25 | - clock-frequency : specifies eSDHC base clock frequency. |
| 26 | |
| 27 | Optional properties: |
| 28 | - sdhci,wp-inverted : specifies that eSDHC controller reports |
| 29 | inverted write-protect state; New devices should use the generic |
| 30 | "wp-inverted" property. |
| 31 | - sdhci,1-bit-only : specifies that a controller can only handle |
| 32 | 1-bit data transfers. New devices should use the generic |
| 33 | "bus-width = <1>" property. |
| 34 | - sdhci,auto-cmd12: specifies that a controller can only handle auto |
| 35 | CMD12. |
| 36 | - voltage-ranges : two cells are required, first cell specifies minimum |
| 37 | slot voltage (mV), second cell specifies maximum slot voltage (mV). |
| 38 | Several ranges could be specified. |
| 39 | - little-endian : If the host controller is little-endian mode, specify |
| 40 | this property. The default endian mode is big-endian. |
| 41 | |
| 42 | Example: |
| 43 | |
| 44 | sdhci@2e000 { |
| 45 | compatible = "fsl,mpc8378-esdhc", "fsl,esdhc"; |
| 46 | reg = <0x2e000 0x1000>; |
| 47 | interrupts = <42 0x8>; |
| 48 | interrupt-parent = <&ipic>; |
| 49 | /* Filled in by U-Boot */ |
| 50 | clock-frequency = <0>; |
| 51 | voltage-ranges = <3300 3300>; |
| 52 | }; |