1
2* Samsung S2MPA01 Voltage and Current Regulator
3
4The Samsung S2MPA01 is a multi-function device which includes high
5efficiency buck converters including Dual-Phase buck converter, various LDOs,
6and an RTC. It is interfaced to the host controller using an I2C interface.
7Each sub-block is addressed by the host system using different I2C slave
8addresses.
9
10Required properties:
11- compatible: Should be "samsung,s2mpa01-pmic".
12- reg: Specifies the I2C slave address of the PMIC block. It should be 0x66.
13
14Optional 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
20Optional 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
26Properties 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
42The following are the names of the regulators that the s2mpa01 PMIC block
43supports. Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number
44as 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
53Example:
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	};
91