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Documentation / devicetree / bindings / mmc / sdhci-pxa.txt




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Based on kernel version 3.19. Page generated on 2015-02-13 21:18 EST.

1	* Marvell sdhci-pxa v2/v3 controller
2	
3	This file documents differences between the core properties in mmc.txt
4	and the properties used by the sdhci-pxav2 and sdhci-pxav3 drivers.
5	
6	Required properties:
7	- compatible: Should be "mrvl,pxav2-mmc", "mrvl,pxav3-mmc" or
8	  "marvell,armada-380-sdhci".
9	- reg:
10	  * for "mrvl,pxav2-mmc" and "mrvl,pxav3-mmc", one register area for
11	    the SDHCI registers.
12	  * for "marvell,armada-380-sdhci", two register areas. The first one
13	    for the SDHCI registers themselves, and the second one for the
14	    AXI/Mbus bridge registers of the SDHCI unit.
15	- clocks: Array of clocks required for SDHCI; requires at least one for
16	    I/O clock.
17	- clock-names: Array of names corresponding to clocks property; shall be
18	    "io" for I/O clock and "core" for optional core clock.
19	
20	Optional properties:
21	- mrvl,clk-delay-cycles: Specify a number of cycles to delay for tuning.
22	
23	Example:
24	
25	sdhci@d4280800 {
26		compatible = "mrvl,pxav3-mmc";
27		reg = <0xd4280800 0x800>;
28		bus-width = <8>;
29		interrupts = <27>;
30		clocks = <&chip CLKID_SDIO1XIN>, <&chip CLKID_SDIO1>;
31		clock-names = "io", "core";
32		non-removable;
33		mrvl,clk-delay-cycles = <31>;
34	};
35	
36	sdhci@d8000 {
37		compatible = "marvell,armada-380-sdhci";
38		reg = <0xd8000 0x1000>, <0xdc000 0x100>;
39		interrupts = <0 25 0x4>;
40		clocks = <&gateclk 17>;
41		clock-names = "io";
42		mrvl,clk-delay-cycles = <0x1F>;
43	};
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