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Documentation / devicetree / bindings / regulator / lp872x.txt




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Based on kernel version 4.7.2. Page generated on 2016-08-22 22:43 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	  - enable-gpios: GPIO specifier for EN pin control of LP872x devices.
32	
33	  Sub nodes for regulator_init_data
34	    LP8720 has maximum 6 nodes. (child name: ldo1 ~ 5 and buck)
35	    LP8725 has maximum 9 nodes. (child name: ldo1 ~ 5, lilo1,2 and buck1,2)
36	    For more details, please see the following binding document.
37	    (Documentation/devicetree/bindings/regulator/regulator.txt)
38	
39	Datasheet
40	  - LP8720: http://www.ti.com/lit/ds/symlink/lp8720.pdf
41	  - LP8725: http://www.ti.com/lit/ds/symlink/lp8725.pdf
42	
43	Example 1) LP8720
44	
45	lp8720@7d {
46		compatible = "ti,lp8720";
47		reg = <0x7d>;
48	
49		/* external DVS pin used, timestep is 25usec */
50		ti,general-config = /bits/ 8 <0x03>;
51		ti,update-config;
52	
53		/*
54		 * The dvs-gpio depends on the processor environment.
55		 * For example, following GPIO specifier means GPIO134 in OMAP4.
56		 */
57		ti,dvs-gpio = <&gpio5 6 0>;
58		ti,dvs-vsel = /bits/ 8 <1>;		/* SEL_V2 */
59		ti,dvs-state = /bits/ 8 <1>;		/* DVS_HIGH */
60	
61		vaf: ldo1 {
62			regulator-min-microvolt = <1200000>;
63			regulator-max-microvolt = <3300000>;
64		};
65	
66		vmmc: ldo2 {
67			regulator-min-microvolt = <1200000>;
68			regulator-max-microvolt = <3300000>;
69		};
70	
71		vcam_io: ldo3 {
72			regulator-min-microvolt = <1200000>;
73			regulator-max-microvolt = <3300000>;
74			regulator-boot-on;
75		};
76	
77		vcam_core: ldo4 {
78			regulator-min-microvolt = <800000>;
79			regulator-max-microvolt = <2850000>;
80			regulator-boot-on;
81		};
82	
83		vcam: ldo5 {
84			regulator-min-microvolt = <1200000>;
85			regulator-max-microvolt = <3300000>;
86		};
87	
88		vcc: buck {
89			regulator-name = "VBUCK";
90			regulator-min-microvolt = <800000>;
91			regulator-max-microvolt = <2300000>;
92		};
93	};
94	
95	Example 2) LP8725
96	
97	lp8725@7a {
98		compatible = "ti,lp8725";
99		reg = <0x7a>;
100	
101		/* Enable BUCK1,2, no DVS, normal LDO mode, timestep is 256usec */
102		ti,general-config = /bits/ 8 <0xdd>;
103		ti,update-config;
104	
105		vcam_io: ldo1 {
106			regulator-min-microvolt = <1200000>;
107			regulator-max-microvolt = <3300000>;
108		};
109	
110		vcam_core: ldo2 {
111			regulator-min-microvolt = <1200000>;
112			regulator-max-microvolt = <3300000>;
113		};
114	
115		vcam: ldo3 {
116			regulator-min-microvolt = <1200000>;
117			regulator-max-microvolt = <3300000>;
118		};
119	
120		vcmmb_io: ldo4 {
121			regulator-min-microvolt = <1200000>;
122			regulator-max-microvolt = <3300000>;
123			regulator-boot-on;
124		};
125	
126		vcmmb_core: ldo5 {
127			regulator-min-microvolt = <1200000>;
128			regulator-max-microvolt = <3300000>;
129			regulator-boot-on;
130		};
131	
132		vaux1: lilo1 {
133			regulator-name = "VAUX1";
134			regulator-min-microvolt = <800000>;
135			regulator-max-microvolt = <3300000>;
136		};
137	
138		vaux2: lilo2 {
139			regulator-name = "VAUX2";
140			regulator-min-microvolt = <800000>;
141			regulator-max-microvolt = <3300000>;
142		};
143	
144		vcc1: buck1 {
145			regulator-name = "VBUCK1";
146			regulator-min-microvolt = <800000>;
147			regulator-max-microvolt = <3000000>;
148			regulator-min-microamp  = <460000>;
149			regulator-max-microamp  = <1370000>;
150			regulator-boot-on;
151		};
152	
153		vcc2: buck2 {
154			regulator-name = "VBUCK2";
155			regulator-min-microvolt = <800000>;
156			regulator-max-microvolt = <3000000>;
157			regulator-min-microamp  = <460000>;
158			regulator-max-microamp  = <1370000>;
159			regulator-boot-on;
160		};
161	};
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