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Documentation / devicetree / bindings / mfd / s2mpa01.txt




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Based on kernel version 3.16. Page generated on 2014-08-06 21:37 EST.

1	
2	* Samsung S2MPA01 Voltage and Current Regulator
3	
4	The Samsung S2MPA01 is a multi-function device which includes high
5	efficiency buck converters including Dual-Phase buck converter, various LDOs,
6	and an RTC. It is interfaced to the host controller using an I2C interface.
7	Each sub-block is addressed by the host system using different I2C slave
8	addresses.
9	
10	Required properties:
11	- compatible: Should be "samsung,s2mpa01-pmic".
12	- reg: Specifies the I2C slave address of the PMIC block. It should be 0x66.
13	
14	Optional properties:
15	- interrupt-parent: Specifies the phandle of the interrupt controller to which
16	  the interrupts from s2mpa01 are delivered to.
17	- interrupts: An interrupt specifier for the sole interrupt generated by the
18	  device.
19	
20	Optional nodes:
21	- regulators: The regulators of s2mpa01 that have to be instantiated should be
22	  included in a sub-node named 'regulators'. Regulator nodes and constraints
23	  included in this sub-node use the standard regulator bindings which are
24	  documented elsewhere.
25	
26	Properties for BUCK regulator nodes:
27	- regulator-ramp-delay: ramp delay in uV/us. May be 6250, 12500
28	  (default), 25000, or 50000. May be 0 for disabling the ramp delay on
29	  BUCK{1,2,3,4}.
30	
31	 In the absence of the regulator-ramp-delay property, the default ramp
32	 delay will be used.
33	
34	  NOTE: Some BUCKs share the ramp rate setting i.e. same ramp value will be set
35	  for a particular group of BUCKs. So provide same regulator-ramp-delay=<value>.
36	
37	  The following BUCKs share ramp settings:
38	  * 1 and 6
39	  * 2 and 4
40	  * 8, 9, and 10
41	
42	The following are the names of the regulators that the s2mpa01 PMIC block
43	supports. Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number
44	as per the datasheet of s2mpa01.
45	
46		- LDOn
47			  - valid values for n are 1 to 26
48			  - Example: LDO1, LD02, LDO26
49		- BUCKn
50			  - valid values for n are 1 to 10.
51			  - Example: BUCK1, BUCK2, BUCK9
52	
53	Example:
54	
55		s2mpa01_pmic@66 {
56			compatible = "samsung,s2mpa01-pmic";
57			reg = <0x66>;
58	
59			regulators {
60				ldo1_reg: LDO1 {
61					regulator-name = "VDD_ALIVE";
62					regulator-min-microvolt = <1000000>;
63					regulator-max-microvolt = <1000000>;
64				};
65	
66				ldo2_reg: LDO2 {
67					regulator-name = "VDDQ_MMC2";
68					regulator-min-microvolt = <2800000>;
69					regulator-max-microvolt = <2800000>;
70					regulator-always-on;
71				};
72	
73				buck1_reg: BUCK1 {
74					regulator-name = "vdd_mif";
75					regulator-min-microvolt = <950000>;
76					regulator-max-microvolt = <1350000>;
77					regulator-always-on;
78					regulator-boot-on;
79				};
80	
81				buck2_reg: BUCK2 {
82					regulator-name = "vdd_arm";
83					regulator-min-microvolt = <950000>;
84					regulator-max-microvolt = <1350000>;
85					regulator-always-on;
86					regulator-boot-on;
87					regulator-ramp-delay = <50000>;
88				};
89			};
90		};
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