mirror of https://gitee.com/openkylin/linux.git
100 lines
3.1 KiB
Plaintext
100 lines
3.1 KiB
Plaintext
Linear Technology LTC3589, LTC3589-1, and LTC3589-2 8-output regulators
|
|
|
|
Required properties:
|
|
- compatible: "lltc,ltc3589", "lltc,ltc3589-1" or "lltc,ltc3589-2"
|
|
- reg: I2C slave address
|
|
|
|
Required child node:
|
|
- regulators: Contains eight regulator child nodes sw1, sw2, sw3, bb-out,
|
|
ldo1, ldo2, ldo3, and ldo4, specifying the initialization data as
|
|
documented in Documentation/devicetree/bindings/regulator/regulator.txt.
|
|
|
|
Each regulator is defined using the standard binding for regulators. The
|
|
nodes for sw1, sw2, sw3, bb-out, ldo1, and ldo2 additionally need to specify
|
|
the resistor values of their external feedback voltage dividers:
|
|
|
|
Required properties (not on ldo3, ldo4):
|
|
- lltc,fb-voltage-divider: An array of two integers containing the resistor
|
|
values R1 and R2 of the feedback voltage divider in ohms.
|
|
|
|
Regulators sw1, sw2, sw3, and ldo2 can regulate the feedback reference from
|
|
0.3625 V to 0.75 V in 12.5 mV steps. The output voltage thus ranges between
|
|
0.3625 * (1 + R1/R2) V and 0.75 * (1 + R1/R2) V. Regulators bb-out and ldo1
|
|
have a fixed 0.8 V reference and thus output 0.8 * (1 + R1/R2) V. The ldo3
|
|
regulator is fixed to 1.8 V on LTC3589 and to 2.8 V on LTC3589-1,2. The ldo4
|
|
regulator can output between 1.8 V and 3.3 V on LTC3589 and between 1.2 V
|
|
and 3.2 V on LTC3589-1,2 in four steps. The ldo1 standby regulator can not
|
|
be disabled and thus should have the regulator-always-on property set.
|
|
|
|
Example:
|
|
|
|
ltc3589: pmic@34 {
|
|
compatible = "lltc,ltc3589-1";
|
|
reg = <0x34>;
|
|
|
|
regulators {
|
|
sw1_reg: sw1 {
|
|
regulator-min-microvolt = <591930>;
|
|
regulator-max-microvolt = <1224671>;
|
|
lltc,fb-voltage-divider = <100000 158000>;
|
|
regulator-ramp-delay = <7000>;
|
|
regulator-boot-on;
|
|
regulator-always-on;
|
|
};
|
|
|
|
sw2_reg: sw2 {
|
|
regulator-min-microvolt = <704123>;
|
|
regulator-max-microvolt = <1456803>;
|
|
lltc,fb-voltage-divider = <180000 191000>;
|
|
regulator-ramp-delay = <7000>;
|
|
regulator-boot-on;
|
|
regulator-always-on;
|
|
};
|
|
|
|
sw3_reg: sw3 {
|
|
regulator-min-microvolt = <1341250>;
|
|
regulator-max-microvolt = <2775000>;
|
|
lltc,fb-voltage-divider = <270000 100000>;
|
|
regulator-ramp-delay = <7000>;
|
|
regulator-boot-on;
|
|
regulator-always-on;
|
|
};
|
|
|
|
bb_out_reg: bb-out {
|
|
regulator-min-microvolt = <3387341>;
|
|
regulator-max-microvolt = <3387341>;
|
|
lltc,fb-voltage-divider = <511000 158000>;
|
|
regulator-boot-on;
|
|
regulator-always-on;
|
|
};
|
|
|
|
ldo1_reg: ldo1 {
|
|
regulator-min-microvolt = <1306329>;
|
|
regulator-max-microvolt = <1306329>;
|
|
lltc,fb-voltage-divider = <100000 158000>;
|
|
regulator-boot-on;
|
|
regulator-always-on;
|
|
};
|
|
|
|
ldo2_reg: ldo2 {
|
|
regulator-min-microvolt = <704123>;
|
|
regulator-max-microvolt = <1456806>;
|
|
lltc,fb-voltage-divider = <180000 191000>;
|
|
regulator-ramp-delay = <7000>;
|
|
regulator-boot-on;
|
|
regulator-always-on;
|
|
};
|
|
|
|
ldo3_reg: ldo3 {
|
|
regulator-min-microvolt = <2800000>;
|
|
regulator-max-microvolt = <2800000>;
|
|
regulator-boot-on;
|
|
};
|
|
|
|
ldo4_reg: ldo4 {
|
|
regulator-min-microvolt = <1200000>;
|
|
regulator-max-microvolt = <3200000>;
|
|
};
|
|
};
|
|
};
|