Bindings/mmc/fsl-esdhc.txt

   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 };