About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Documentation / devicetree / bindings / regulator / lp872x.txt




Custom Search

Based on kernel version 3.16. Page generated on 2014-08-06 21:38 EST.

1	Binding for TI/National Semiconductor LP872x Driver
2	
3	Required properties:
4	  - compatible: "ti,lp8720" or "ti,lp8725"
5	  - reg: I2C slave address. 0x7d = LP8720, 0x7a = LP8725
6	
7	Optional properties:
8	  - ti,general-config: the value of LP872X_GENERAL_CFG register (u8)
9	    (LP8720)
10	    bit[2]: BUCK output voltage control by external DVS pin or register
11	            1 = external pin, 0 = bit7 of register 08h
12	    bit[1]: sleep control by external DVS pin or register
13	            1 = external pin, 0 = bit6 of register 08h
14	    bit[0]: time step unit(usec). 1 = 25, 0 = 50
15	
16	    (LP8725)
17	    bit[7:6]: time step unit(usec). 00 = 32, 01 = 64, 10 = 128, 11 = 256
18	    bit[4]:   BUCK2 enable control. 1 = enable, 0 = disable
19	    bit[3]:   BUCK2 output voltage register address. 1 = 0Ah, 0 = 0Bh
20	    bit[2]:   BUCK1 output voltage control by external DVS pin or register
21	              1 = register 08h, 0 = DVS
22	    bit[1]:   LDO sleep control. 1 = sleep mode, 0 = normal
23	    bit[0]:   BUCK1 enable control, 1 = enable, 0 = disable
24	
25	    For more details, please see the datasheet.
26	
27	  - ti,update-config: define it when LP872X_GENERAL_CFG register should be set
28	  - ti,dvs-gpio: GPIO specifier for external DVS pin control of LP872x devices.
29	  - ti,dvs-vsel: DVS selector. 0 = SEL_V1, 1 = SEL_V2.
30	  - ti,dvs-state: initial DVS pin state. 0 = DVS_LOW, 1 = DVS_HIGH.
31	
32	  Sub nodes for regulator_init_data
33	    LP8720 has maximum 6 nodes. (child name: ldo1 ~ 5 and buck)
34	    LP8725 has maximum 9 nodes. (child name: ldo1 ~ 5, lilo1,2 and buck1,2)
35	    For more details, please see the following binding document.
36	    (Documentation/devicetree/bindings/regulator/regulator.txt)
37	
38	Datasheet
39	  - LP8720: http://www.ti.com/lit/ds/symlink/lp8720.pdf
40	  - LP8725: http://www.ti.com/lit/ds/symlink/lp8725.pdf
41	
42	Example 1) LP8720
43	
44	lp8720@7d {
45		compatible = "ti,lp8720";
46		reg = <0x7d>;
47	
48		/* external DVS pin used, timestep is 25usec */
49		ti,general-config = /bits/ 8 <0x03>;
50		ti,update-config;
51	
52		/*
53		 * The dvs-gpio depends on the processor environment.
54		 * For example, following GPIO specifier means GPIO134 in OMAP4.
55		 */
56		ti,dvs-gpio = <&gpio5 6 0>;
57		ti,dvs-vsel = /bits/ 8 <1>;		/* SEL_V2 */
58		ti,dvs-state = /bits/ 8 <1>;		/* DVS_HIGH */
59	
60		vaf: ldo1 {
61			regulator-min-microvolt = <1200000>;
62			regulator-max-microvolt = <3300000>;
63		};
64	
65		vmmc: ldo2 {
66			regulator-min-microvolt = <1200000>;
67			regulator-max-microvolt = <3300000>;
68		};
69	
70		vcam_io: ldo3 {
71			regulator-min-microvolt = <1200000>;
72			regulator-max-microvolt = <3300000>;
73			regulator-boot-on;
74		};
75	
76		vcam_core: ldo4 {
77			regulator-min-microvolt = <800000>;
78			regulator-max-microvolt = <2850000>;
79			regulator-boot-on;
80		};
81	
82		vcam: ldo5 {
83			regulator-min-microvolt = <1200000>;
84			regulator-max-microvolt = <3300000>;
85		};
86	
87		vcc: buck {
88			regulator-name = "VBUCK";
89			regulator-min-microvolt = <800000>;
90			regulator-max-microvolt = <2300000>;
91		};
92	};
93	
94	Example 2) LP8725
95	
96	lp8725@7a {
97		compatible = "ti,lp8725";
98		reg = <0x7a>;
99	
100		/* Enable BUCK1,2, no DVS, normal LDO mode, timestep is 256usec */
101		ti,general-config = /bits/ 8 <0xdd>;
102		ti,update-config;
103	
104		vcam_io: ldo1 {
105			regulator-min-microvolt = <1200000>;
106			regulator-max-microvolt = <3300000>;
107		};
108	
109		vcam_core: ldo2 {
110			regulator-min-microvolt = <1200000>;
111			regulator-max-microvolt = <3300000>;
112		};
113	
114		vcam: ldo3 {
115			regulator-min-microvolt = <1200000>;
116			regulator-max-microvolt = <3300000>;
117		};
118	
119		vcmmb_io: ldo4 {
120			regulator-min-microvolt = <1200000>;
121			regulator-max-microvolt = <3300000>;
122			regulator-boot-on;
123		};
124	
125		vcmmb_core: ldo5 {
126			regulator-min-microvolt = <1200000>;
127			regulator-max-microvolt = <3300000>;
128			regulator-boot-on;
129		};
130	
131		vaux1: lilo1 {
132			regulator-name = "VAUX1";
133			regulator-min-microvolt = <800000>;
134			regulator-max-microvolt = <3300000>;
135		};
136	
137		vaux2: lilo2 {
138			regulator-name = "VAUX2";
139			regulator-min-microvolt = <800000>;
140			regulator-max-microvolt = <3300000>;
141		};
142	
143		vcc1: buck1 {
144			regulator-name = "VBUCK1";
145			regulator-min-microvolt = <800000>;
146			regulator-max-microvolt = <3000000>;
147			regulator-min-microamp  = <460000>;
148			regulator-max-microamp  = <1370000>;
149			regulator-boot-on;
150		};
151	
152		vcc2: buck2 {
153			regulator-name = "VBUCK2";
154			regulator-min-microvolt = <800000>;
155			regulator-max-microvolt = <3000000>;
156			regulator-min-microamp  = <460000>;
157			regulator-max-microamp  = <1370000>;
158			regulator-boot-on;
159		};
160	};
Hide Line Numbers
About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Information is copyright its respective author. All material is available from the Linux Kernel Source distributed under a GPL License. This page is provided as a free service by mjmwired.net.