xref: /freebsd/sys/contrib/device-tree/Bindings/regulator/samsung,s2mpa01.txt (revision 2008043f386721d58158e37e0d7e50df8095942d) 
1Binding for Samsung S2MPA01 regulator block
2===========================================
3
4This is a part of device tree bindings for S2M family multi-function devices.
5More information can be found in bindings/mfd/sec-core.txt file.
6
7The S2MPA01 device provide buck and LDO regulators.
8
9To register these with regulator framework instantiate under main device node
10a sub-node named "regulators" with more sub-nodes for each regulator using the
11common regulator binding documented in:
12 - Documentation/devicetree/bindings/regulator/regulator.txt
13
14
15Names of regulators supported by S2MPA01 device:
16	- LDOn
17		  - valid values for n are 1 to 26
18		  - Example: LDO1, LD02, LDO26
19	- BUCKn
20		  - valid values for n are 1 to 10.
21		  - Example: BUCK1, BUCK2, BUCK9
22Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number
23as per the datasheet of device.
24
25
26Optional properties of buck regulator nodes under "regulators" sub-node:
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
35   will be set for a particular group of bucks so provide the same
36   regulator-ramp-delay value for them.
37   Groups sharing ramp rate:
38    - buck{1,6},
39    - buck{2,4},
40    - buck{8,9,10}.
41
42Example:
43
44	s2mpa01_pmic@66 {
45		compatible = "samsung,s2mpa01-pmic";
46		reg = <0x66>;
47
48		regulators {
49			ldo1_reg: LDO1 {
50				regulator-name = "VDD_ALIVE";
51				regulator-min-microvolt = <1000000>;
52				regulator-max-microvolt = <1000000>;
53			};
54
55			ldo2_reg: LDO2 {
56				regulator-name = "VDDQ_MMC2";
57				regulator-min-microvolt = <2800000>;
58				regulator-max-microvolt = <2800000>;
59				regulator-always-on;
60			};
61
62			buck1_reg: BUCK1 {
63				regulator-name = "vdd_mif";
64				regulator-min-microvolt = <950000>;
65				regulator-max-microvolt = <1350000>;
66				regulator-always-on;
67				regulator-boot-on;
68			};
69
70			buck2_reg: BUCK2 {
71				regulator-name = "vdd_arm";
72				regulator-min-microvolt = <950000>;
73				regulator-max-microvolt = <1350000>;
74				regulator-always-on;
75				regulator-boot-on;
76				regulator-ramp-delay = <50000>;
77			};
78		};
79	};
80