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Documentation / devicetree / bindings / ufs / ufshcd-pltfrm.txt




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Based on kernel version 4.0. Page generated on 2015-04-14 21:23 EST.

1	* Universal Flash Storage (UFS) Host Controller
2	
3	UFSHC nodes are defined to describe on-chip UFS host controllers.
4	Each UFS controller instance should have its own node.
5	
6	Required properties:
7	- compatible        : compatible list, contains "jedec,ufs-1.1"
8	- interrupts        : <interrupt mapping for UFS host controller IRQ>
9	- reg               : <registers mapping>
10	
11	Optional properties:
12	- vdd-hba-supply        : phandle to UFS host controller supply regulator node
13	- vcc-supply            : phandle to VCC supply regulator node
14	- vccq-supply           : phandle to VCCQ supply regulator node
15	- vccq2-supply          : phandle to VCCQ2 supply regulator node
16	- vcc-supply-1p8        : For embedded UFS devices, valid VCC range is 1.7-1.95V
17	                          or 2.7-3.6V. This boolean property when set, specifies
18				  to use low voltage range of 1.7-1.95V. Note for external
19				  UFS cards this property is invalid and valid VCC range is
20				  always 2.7-3.6V.
21	- vcc-max-microamp      : specifies max. load that can be drawn from vcc supply
22	- vccq-max-microamp     : specifies max. load that can be drawn from vccq supply
23	- vccq2-max-microamp    : specifies max. load that can be drawn from vccq2 supply
24	- <name>-fixed-regulator : boolean property specifying that <name>-supply is a fixed regulator
25	
26	- clocks                : List of phandle and clock specifier pairs
27	- clock-names           : List of clock input name strings sorted in the same
28	                          order as the clocks property.
29	- freq-table-hz		: Array of <min max> operating frequencies stored in the same
30	                          order as the clocks property. If this property is not
31				  defined or a value in the array is "0" then it is assumed
32				  that the frequency is set by the parent clock or a
33				  fixed rate clock source.
34	
35	Note: If above properties are not defined it can be assumed that the supply
36	regulators or clocks are always on.
37	
38	Example:
39		ufshc@0xfc598000 {
40			compatible = "jedec,ufs-1.1";
41			reg = <0xfc598000 0x800>;
42			interrupts = <0 28 0>;
43	
44			vdd-hba-supply = <&xxx_reg0>;
45			vdd-hba-fixed-regulator;
46			vcc-supply = <&xxx_reg1>;
47			vcc-supply-1p8;
48			vccq-supply = <&xxx_reg2>;
49			vccq2-supply = <&xxx_reg3>;
50			vcc-max-microamp = 500000;
51			vccq-max-microamp = 200000;
52			vccq2-max-microamp = 200000;
53	
54			clocks = <&core 0>, <&ref 0>, <&iface 0>;
55			clock-names = "core_clk", "ref_clk", "iface_clk";
56			freq-table-hz = <100000000 200000000>, <0 0>, <0 0>;
57		};
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