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Documentation / devicetree / bindings / mmc / fsl-esdhc.txt




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Based on kernel version 4.13.3. Page generated on 2017-09-23 13:55 EST.

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,ls1088a-esdhc"
21		"fsl,ls1043a-esdhc"
22		"fsl,ls1046a-esdhc"
23		"fsl,ls2080a-esdhc"
24	  - interrupt-parent : interrupt source phandle.
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	};
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