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Documentation / devicetree / bindings / mmc / ti-omap-hsmmc.txt




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Based on kernel version 3.15.4. Page generated on 2014-07-07 09:01 EST.

1	* TI Highspeed MMC host controller for OMAP
2	
3	The Highspeed MMC Host Controller on TI OMAP family
4	provides an interface 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 omap_hsmmc driver.
8	
9	Required properties:
10	- compatible:
11	 Should be "ti,omap2-hsmmc", for OMAP2 controllers
12	 Should be "ti,omap3-hsmmc", for OMAP3 controllers
13	 Should be "ti,omap3-pre-es3-hsmmc" for OMAP3 controllers pre ES3.0
14	 Should be "ti,omap4-hsmmc", for OMAP4 controllers
15	- ti,hwmods: Must be "mmc<n>", n is controller instance starting 1
16	
17	Optional properties:
18	ti,dual-volt: boolean, supports dual voltage cards
19	<supply-name>-supply: phandle to the regulator device tree node
20	"supply-name" examples are "vmmc", "vmmc_aux" etc
21	ti,non-removable: non-removable slot (like eMMC)
22	ti,needs-special-reset: Requires a special softreset sequence
23	ti,needs-special-hs-handling: HSMMC IP needs special setting for handling High Speed
24	dmas: List of DMA specifiers with the controller specific format
25	as described in the generic DMA client binding. A tx and rx
26	specifier is required.
27	dma-names: List of DMA request names. These strings correspond
28	1:1 with the DMA specifiers listed in dmas. The string naming is
29	to be "rx" and "tx" for RX and TX DMA requests, respectively.
30	
31	Examples:
32	
33	[hwmod populated DMA resources]
34	
35		mmc1: mmc@0x4809c000 {
36			compatible = "ti,omap4-hsmmc";
37			reg = <0x4809c000 0x400>;
38			ti,hwmods = "mmc1";
39			ti,dual-volt;
40			bus-width = <4>;
41			vmmc-supply = <&vmmc>; /* phandle to regulator node */
42			ti,non-removable;
43		};
44	
45	[generic DMA request binding]
46	
47		mmc1: mmc@0x4809c000 {
48			compatible = "ti,omap4-hsmmc";
49			reg = <0x4809c000 0x400>;
50			ti,hwmods = "mmc1";
51			ti,dual-volt;
52			bus-width = <4>;
53			vmmc-supply = <&vmmc>; /* phandle to regulator node */
54			ti,non-removable;
55			dmas = <&edma 24
56				&edma 25>;
57			dma-names = "tx", "rx";
58		};
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