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4ece7045 JMC |
1 | Binding for Maxim MAX77802 regulators |
2 | ||
3 | This is a part of device tree bindings of MAX77802 multi-function device. | |
4 | More information can be found in bindings/mfd/max77802.txt file. | |
5 | ||
6 | The MAX77802 PMIC has 10 high-efficiency Buck and 32 Low-dropout (LDO) | |
7 | regulators that can be controlled over I2C. | |
8 | ||
9 | Following properties should be present in main device node of the MFD chip. | |
10 | ||
f40eb916 JMC |
11 | Optional properties: |
12 | - inb1-supply: The input supply for BUCK1 | |
13 | - inb2-supply: The input supply for BUCK2 | |
14 | - inb3-supply: The input supply for BUCK3 | |
15 | - inb4-supply: The input supply for BUCK4 | |
16 | - inb5-supply: The input supply for BUCK5 | |
17 | - inb6-supply: The input supply for BUCK6 | |
18 | - inb7-supply: The input supply for BUCK7 | |
19 | - inb8-supply: The input supply for BUCK8 | |
20 | - inb9-supply: The input supply for BUCK9 | |
21 | - inb10-supply: The input supply for BUCK10 | |
22 | - inl1-supply: The input supply for LDO8 and LDO15 | |
23 | - inl2-supply: The input supply for LDO17, LDO27, LDO30 and LDO35 | |
24 | - inl3-supply: The input supply for LDO3, LDO5, LDO6 and LDO7 | |
25 | - inl4-supply: The input supply for LDO10, LDO11, LDO13 and LDO14 | |
26 | - inl5-supply: The input supply for LDO9 and LDO19 | |
27 | - inl6-supply: The input supply for LDO4, LDO21, LDO24 and LDO33 | |
28 | - inl7-supply: The input supply for LDO18, LDO20, LDO28 and LDO29 | |
29 | - inl9-supply: The input supply for LDO12, LDO23, LDO25, LDO26, LDO32 and LDO34 | |
30 | - inl10-supply: The input supply for LDO1 and LDO2 | |
45d5ea48 JMC |
31 | |
32 | Optional nodes: | |
4ece7045 JMC |
33 | - regulators : The regulators of max77802 have to be instantiated |
34 | under subnode named "regulators" using the following format. | |
35 | ||
36 | regulator-name { | |
37 | standard regulator constraints.... | |
38 | }; | |
39 | refer Documentation/devicetree/bindings/regulator/regulator.txt | |
40 | ||
41 | The regulator node name should be initialized with a string to get matched | |
42 | with their hardware counterparts as follow. The valid names are: | |
43 | ||
44 | -LDOn : for LDOs, where n can lie in ranges 1-15, 17-21, 23-30 | |
45 | and 32-35. | |
46 | example: LDO1, LDO2, LDO35. | |
47 | -BUCKn : for BUCKs, where n can lie in range 1 to 10. | |
48 | example: BUCK1, BUCK5, BUCK10. | |
bf66c48d JMC |
49 | |
50 | The max77802 regulator supports two different operating modes: Normal and Low | |
51 | Power Mode. Some regulators support the modes to be changed at startup or by | |
52 | the consumers during normal operation while others only support to change the | |
53 | mode during system suspend. The standard regulator suspend states binding can | |
54 | be used to configure the regulator operating mode. | |
55 | ||
56 | The regulators that support the standard "regulator-initial-mode" property, | |
57 | changing their mode during normal operation are: LDOs 1, 3, 20 and 21. | |
58 | ||
59 | The possible values for "regulator-initial-mode" and "regulator-mode" are: | |
60 | 1: Normal regulator voltage output mode. | |
61 | 3: Low Power which reduces the quiescent current down to only 1uA | |
62 | ||
63 | The list of valid modes are defined in the dt-bindings/clock/maxim,max77802.h | |
64 | header and can be included by device tree source files. | |
65 | ||
66 | The standard "regulator-mode" property can only be used for regulators that | |
67 | support changing their mode to Low Power Mode during suspend. These regulators | |
68 | are: BUCKs 2-4 and LDOs 1-35. Also, it only takes effect if the regulator has | |
69 | been enabled for the given suspend state using "regulator-on-in-suspend" and | |
70 | has not been disabled for that state using "regulator-off-in-suspend". | |
71 | ||
4ece7045 JMC |
72 | Example: |
73 | ||
74 | max77802@09 { | |
75 | compatible = "maxim,max77802"; | |
76 | interrupt-parent = <&wakeup_eint>; | |
77 | interrupts = <26 0>; | |
78 | reg = <0x09>; | |
79 | #address-cells = <1>; | |
80 | #size-cells = <0>; | |
81 | ||
f40eb916 JMC |
82 | inb1-supply = <&parent_reg>; |
83 | ||
4ece7045 | 84 | regulators { |
bf66c48d JMC |
85 | ldo1_reg: LDO1 { |
86 | regulator-name = "vdd_1v0"; | |
87 | regulator-min-microvolt = <1000000>; | |
88 | regulator-max-microvolt = <1000000>; | |
89 | regulator-always-on; | |
90 | regulator-initial-mode = <MAX77802_OPMODE_LP>; | |
91 | }; | |
92 | ||
4ece7045 JMC |
93 | ldo11_reg: LDO11 { |
94 | regulator-name = "vdd_ldo11"; | |
95 | regulator-min-microvolt = <1900000>; | |
96 | regulator-max-microvolt = <1900000>; | |
97 | regulator-always-on; | |
bf66c48d JMC |
98 | regulator-state-mem { |
99 | regulator-on-in-suspend; | |
100 | regulator-mode = <MAX77802_OPMODE_LP>; | |
101 | }; | |
4ece7045 JMC |
102 | }; |
103 | ||
104 | buck1_reg: BUCK1 { | |
105 | regulator-name = "vdd_mif"; | |
106 | regulator-min-microvolt = <950000>; | |
107 | regulator-max-microvolt = <1300000>; | |
108 | regulator-always-on; | |
109 | regulator-boot-on; | |
110 | }; | |
111 | }; |