[deliverable/linux.git] / Documentation / devicetree / bindings / mmc / fsl-esdhc.txt

* 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.

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>;
};
Commit	Line	Data
34bcda61 AV	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
4efafee0 CB	6	This file documents differences between the core properties described
	7	by mmc.txt and the properties used by the sdhci-esdhc driver.
	8
34bcda61	9	Required properties:
34bcda61 AV	10	- interrupt-parent : interrupt source phandle.
34bcda61 AV	11	- clock-frequency : specifies eSDHC base clock frequency.
4efafee0 CB	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.
34bcda61 AV	22
	23	Example:
	24
	25	sdhci@2e000 {
40461472	26	compatible = "fsl,mpc8378-esdhc", "fsl,esdhc";
34bcda61 AV	27	reg = <0x2e000 0x1000>;
	28	interrupts = <42 0x8>;
	29	interrupt-parent = <&ipic>;
	30	/* Filled in by U-Boot */
	31	clock-frequency = <0>;
	32	};