linux/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt
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   1* Freescale Enhanced Secure Digital Host Controller (eSDHC)
   2
   3The Enhanced Secure Digital Host Controller provides an interface
   4for MMC, SD, and SDIO types of memory cards.
   5
   6This file documents differences between the core properties described
   7by mmc.txt and the properties used by the sdhci-esdhc driver.
   8
   9Required properties:
  10  - interrupt-parent : interrupt source phandle.
  11  - clock-frequency : specifies eSDHC base clock frequency.
  12
  13Optional 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
  23Example:
  24
  25sdhci@2e000 {
  26        compatible = "fsl,mpc8378-esdhc", "fsl,esdhc";
  27        reg = <0x2e000 0x1000>;
  28        interrupts = <42 0x8>;
  29        interrupt-parent = <&ipic>;
  30        /* Filled in by U-Boot */
  31        clock-frequency = <0>;
  32};
  33