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Regulator DT binding for MAX77620 Power management IC from Maxim Semiconductor.
Device has multiple DCDC(sd[0-3] and LDOs(ldo[0-8]). The input supply
of these regulators are defined under parent device node.
Details of regulator properties are defined as child node under
sub-node "regulators" which is child node of device node.
Please refer file <Documentation/devicetree/bindings/regulator/regulator.txt>
for common regulator bindings used by client.
Following are properties of parent node related to regulators.
Optional properties:
-------------------
The input supply of regulators are the optional properties on the
parent device node. The input supply of these regulators are provided
through following properties:
in-sd0-supply: Input supply for SD0, INA-SD0 or INB-SD0 pins.
in-sd1-supply: Input supply for SD1.
in-sd2-supply: Input supply for SD2.
in-sd3-supply: Input supply for SD3.
in-ldo0-1-supply: Input supply for LDO0 and LDO1.
in-ldo2-supply: Input supply for LDO2.
in-ldo3-5-supply: Input supply for LDO3 and LDO5
in-ldo4-6-supply: Input supply for LDO4 and LDO6.
in-ldo7-8-supply: Input supply for LDO7 and LDO8.
Optional sub nodes for regulators under "regulators" subnode:
------------------------------------------------------------
The subnodes name is the name of regulator and it must be one of:
sd[0-3], ldo[0-8]
Each sub-node should contain the constraints and initialization
information for that regulator. The definition for each of these
nodes is defined using the standard binding for regulators found at
<Documentation/devicetree/bindings/regulator/regulator.txt>.
Theres are also additional properties for SD/LDOs. These additional properties
are required to configure FPS configuration parameters for SDs and LDOs.
Please refer <devicetree/bindings/mfd/max77620.txt> for more detail of Flexible
Power Sequence (FPS).
Following are additional properties:
- maxim,active-fps-source: FPS source for the regulators to get
enabled/disabled when system is in
active state. Valid values are:
- MAX77620_FPS_SRC_0,
FPS source is FPS0.
- MAX77620_FPS_SRC_1,
FPS source is FPS1
- MAX77620_FPS_SRC_2 and
FPS source is FPS2
- MAX77620_FPS_SRC_NONE.
Regulator is not controlled
by FPS events and it gets
enabled/disabled by register
access.
Absence of this property will leave
the FPS configuration register for that
regulator to default configuration.
- maxim,active-fps-power-up-slot: Sequencing event slot number on which
the regulator get enabled when
master FPS input event set to HIGH.
Valid values are 0 to 7.
This is applicable if FPS source is
selected as FPS0, FPS1 or FPS2.
- maxim,active-fps-power-down-slot: Sequencing event slot number on which
the regulator get disabled when master
FPS input event set to LOW.
Valid values are 0 to 7.
This is applicable if FPS source is
selected as FPS0, FPS1 or FPS2.
- maxim,suspend-fps-source: This is same as property
"maxim,active-fps-source" but value
get configured when system enters in
to suspend state.
- maxim,suspend-fps-power-up-slot: This is same as property
"maxim,active-fps-power-up-slot" but
this value get configured into FPS
configuration register when system
enters into suspend.
This is applicable if suspend state
FPS source is selected as FPS0, FPS1 or
- maxim,suspend-fps-power-down-slot: This is same as property
"maxim,active-fps-power-down-slot" but
this value get configured into FPS
configuration register when system
enters into suspend.
This is applicable if suspend state
FPS source is selected as FPS0, FPS1 or
FPS2.
Example:
--------
#include <dt-bindings/mfd/max77620.h>
...
max77620@3c {
in-ldo0-1-supply = <&max77620_sd2>;
in-ldo7-8-supply = <&max77620_sd2>;
regulators {
sd0 {
regulator-name = "vdd-core";
regulator-min-microvolt = <600000>;
regulator-max-microvolt = <1400000>;
regulator-boot-on;
regulator-always-on;
maxim,active-fps-source = <MAX77620_FPS_SRC_1>;
};
sd1 {
regulator-name = "vddio-ddr";
regulator-min-microvolt = <1200000>;
regulator-max-microvolt = <1200000>;
regulator-always-on;
regulator-boot-on;
maxim,active-fps-source = <MAX77620_FPS_SRC_0>;
};
sd2 {
regulator-name = "vdd-pre-reg";
regulator-min-microvolt = <1350000>;
regulator-max-microvolt = <1350000>;
};
sd3 {
regulator-name = "vdd-1v8";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
regulator-boot-on;
};
ldo0 {
regulator-name = "avdd-sys";
regulator-min-microvolt = <1200000>;
regulator-max-microvolt = <1200000>;
regulator-always-on;
regulator-boot-on;
};
ldo1 {
regulator-name = "vdd-pex";
regulator-min-microvolt = <1050000>;
regulator-max-microvolt = <1050000>;
};
ldo2 {
regulator-name = "vddio-sdmmc3";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <3300000>;
};
ldo3 {
regulator-name = "vdd-cam-hv";
regulator-min-microvolt = <2800000>;
regulator-max-microvolt = <2800000>;
};
ldo4 {
regulator-name = "vdd-rtc";
regulator-min-microvolt = <1250000>;
regulator-max-microvolt = <1250000>;
regulator-always-on;
regulator-boot-on;
};
ldo5 {
regulator-name = "avdd-ts-hv";
regulator-min-microvolt = <3000000>;
regulator-max-microvolt = <3000000>;
};
ldo6 {
regulator-name = "vdd-ts";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
regulator-boot-on;
};
ldo7 {
regulator-name = "vdd-gen-pll-edp";
regulator-min-microvolt = <1050000>;
regulator-max-microvolt = <1050000>;
regulator-always-on;
regulator-boot-on;
};
ldo8 {
regulator-name = "vdd-hdmi-dp";
regulator-min-microvolt = <1050000>;
regulator-max-microvolt = <1050000>;
};
};
};
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