tjh.dev
Linux kernel mirror (for testing)
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kernel
os
linux
1Voltage/Current Regulators
2
3Optional properties:
4- regulator-name: A string used as a descriptive name for regulator outputs
5- regulator-min-microvolt: smallest voltage consumers may set
6- regulator-max-microvolt: largest voltage consumers may set
7- regulator-microvolt-offset: Offset applied to voltages to compensate for voltage drops
8- regulator-min-microamp: smallest current consumers may set
9- regulator-max-microamp: largest current consumers may set
10- regulator-always-on: boolean, regulator should never be disabled
11- regulator-boot-on: bootloader/firmware enabled regulator
12- regulator-allow-bypass: allow the regulator to go into bypass mode
13- <name>-supply: phandle to the parent supply/regulator node
14- regulator-ramp-delay: ramp delay for regulator(in uV/uS)
15 For hardwares which support disabling ramp rate, it should be explicitly
16 intialised to zero (regulator-ramp-delay = <0>) for disabling ramp delay.
17- regulator-enable-ramp-delay: The time taken, in microseconds, for the supply
18 rail to reach the target voltage, plus/minus whatever tolerance the board
19 design requires. This property describes the total system ramp time
20 required due to the combination of internal ramping of the regulator itself,
21 and board design issues such as trace capacitance and load on the supply.
22
23Deprecated properties:
24- regulator-compatible: If a regulator chip contains multiple
25 regulators, and if the chip's binding contains a child node that
26 describes each regulator, then this property indicates which regulator
27 this child node is intended to configure. If this property is missing,
28 the node's name will be used instead.
29
30Example:
31
32 xyzreg: regulator@0 {
33 regulator-min-microvolt = <1000000>;
34 regulator-max-microvolt = <2500000>;
35 regulator-always-on;
36 vin-supply = <&vin>;
37 };
38
39Regulator Consumers:
40Consumer nodes can reference one or more of its supplies/
41regulators using the below bindings.
42
43- <name>-supply: phandle to the regulator node
44
45These are the same bindings that a regulator in the above
46example used to reference its own supply, in which case
47its just seen as a special case of a regulator being a
48consumer itself.
49
50Example of a consumer device node (mmc) referencing two
51regulators (twl_reg1 and twl_reg2),
52
53 twl_reg1: regulator@0 {
54 ...
55 ...
56 ...
57 };
58
59 twl_reg2: regulator@1 {
60 ...
61 ...
62 ...
63 };
64
65 mmc: mmc@0x0 {
66 ...
67 ...
68 vmmc-supply = <&twl_reg1>;
69 vmmcaux-supply = <&twl_reg2>;
70 };