Documentation/devicetree/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   - interrupt-parent : interrupt source phandle.
  11   - clock-frequency : specifies eSDHC base clock frequency.
  12
  13 Optional properties:
  14   - sdhci,wp-inverted : specifies that eSDHC controller reports
  15     inverted write-protect state; New devices should use the generic
  16     "wp-inverted" property.
  17   - sdhci,1-bit-only : specifies that a controller can only handle
  18     1-bit data transfers. New devices should use the generic
  19     "bus-width = <1>" property.
  20   - sdhci,auto-cmd12: specifies that a controller can only handle auto
  21     CMD12.
  22   - voltage-ranges : two cells are required, first cell specifies minimum
  23     slot voltage (mV), second cell specifies maximum slot voltage (mV).
  24     Several ranges could be specified.
  25
  26 Example:
  27
  28 sdhci@2e000 {
  29         compatible = "fsl,mpc8378-esdhc", "fsl,esdhc";
  30         reg = <0x2e000 0x1000>;
  31         interrupts = <42 0x8>;
  32         interrupt-parent = <&ipic>;
  33         /* Filled in by U-Boot */
  34         clock-frequency = <0>;
  35         voltage-ranges = <3300 3300>;
  36 };