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




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Based on kernel version 3.13. Page generated on 2014-01-20 22:01 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,omap4-hsmmc", for OMAP4 controllers
14	- ti,hwmods: Must be "mmc<n>", n is controller instance starting 1
15	
16	Optional properties:
17	ti,dual-volt: boolean, supports dual voltage cards
18	<supply-name>-supply: phandle to the regulator device tree node
19	"supply-name" examples are "vmmc", "vmmc_aux" etc
20	ti,non-removable: non-removable slot (like eMMC)
21	ti,needs-special-reset: Requires a special softreset sequence
22	ti,needs-special-hs-handling: HSMMC IP needs special setting for handling High Speed
23	dmas: List of DMA specifiers with the controller specific format
24	as described in the generic DMA client binding. A tx and rx
25	specifier is required.
26	dma-names: List of DMA request names. These strings correspond
27	1:1 with the DMA specifiers listed in dmas. The string naming is
28	to be "rx" and "tx" for RX and TX DMA requests, respectively.
29	
30	Examples:
31	
32	[hwmod populated DMA resources]
33	
34		mmc1: mmc@0x4809c000 {
35			compatible = "ti,omap4-hsmmc";
36			reg = <0x4809c000 0x400>;
37			ti,hwmods = "mmc1";
38			ti,dual-volt;
39			bus-width = <4>;
40			vmmc-supply = <&vmmc>; /* phandle to regulator node */
41			ti,non-removable;
42		};
43	
44	[generic DMA request binding]
45	
46		mmc1: mmc@0x4809c000 {
47			compatible = "ti,omap4-hsmmc";
48			reg = <0x4809c000 0x400>;
49			ti,hwmods = "mmc1";
50			ti,dual-volt;
51			bus-width = <4>;
52			vmmc-supply = <&vmmc>; /* phandle to regulator node */
53			ti,non-removable;
54			dmas = <&edma 24
55				&edma 25>;
56			dma-names = "tx", "rx";
57		};
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