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94 lines
2.7 KiB
94 lines
2.7 KiB
Linear Technology LTC3676 8-output regulators |
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Required properties: |
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- compatible: "lltc,ltc3676" |
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- reg: I2C slave address |
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Required child node: |
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- regulators: Contains eight regulator child nodes sw1, sw2, sw3, sw4, |
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ldo1, ldo2, ldo3, and ldo4, specifying the initialization data as |
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documented in Documentation/devicetree/bindings/regulator/regulator.txt. |
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Each regulator is defined using the standard binding for regulators. The |
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nodes for sw1, sw2, sw3, sw4, ldo1, ldo2 and ldo4 additionally need to specify |
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the resistor values of their external feedback voltage dividers: |
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Required properties (not on ldo3): |
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- lltc,fb-voltage-divider: An array of two integers containing the resistor |
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values R1 and R2 of the feedback voltage divider in ohms. |
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Regulators sw1, sw2, sw3, sw4 can regulate the feedback reference from: |
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412.5mV to 800mV in 12.5 mV steps. The output voltage thus ranges between |
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0.4125 * (1 + R1/R2) V and 0.8 * (1 + R1/R2) V. |
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Regulators ldo1, ldo2, and ldo4 have a fixed 0.725 V reference and thus output |
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0.725 * (1 + R1/R2) V. The ldo3 regulator is fixed to 1.8 V. The ldo1 standby |
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regulator can not be disabled and thus should have the regulator-always-on |
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property set. |
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Example: |
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ltc3676: pmic@3c { |
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compatible = "lltc,ltc3676"; |
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reg = <0x3c>; |
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regulators { |
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sw1_reg: sw1 { |
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regulator-min-microvolt = <674400>; |
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regulator-max-microvolt = <1308000>; |
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lltc,fb-voltage-divider = <127000 200000>; |
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regulator-ramp-delay = <7000>; |
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regulator-boot-on; |
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regulator-always-on; |
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}; |
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sw2_reg: sw2 { |
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regulator-min-microvolt = <1033310>; |
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regulator-max-microvolt = <200400>; |
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lltc,fb-voltage-divider = <301000 200000>; |
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regulator-ramp-delay = <7000>; |
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regulator-boot-on; |
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regulator-always-on; |
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}; |
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sw3_reg: sw3 { |
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regulator-min-microvolt = <674400>; |
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regulator-max-microvolt = <130800>; |
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lltc,fb-voltage-divider = <127000 200000>; |
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regulator-ramp-delay = <7000>; |
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regulator-boot-on; |
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regulator-always-on; |
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}; |
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sw4_reg: sw4 { |
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regulator-min-microvolt = <868310>; |
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regulator-max-microvolt = <168400>; |
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lltc,fb-voltage-divider = <221000 200000>; |
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regulator-ramp-delay = <7000>; |
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regulator-boot-on; |
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regulator-always-on; |
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}; |
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ldo2_reg: ldo2 { |
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regulator-min-microvolt = <2490375>; |
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regulator-max-microvolt = <2490375>; |
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lltc,fb-voltage-divider = <487000 200000>; |
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regulator-boot-on; |
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regulator-always-on; |
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}; |
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ldo3_reg: ldo3 { |
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regulator-min-microvolt = <1800000>; |
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regulator-max-microvolt = <1800000>; |
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regulator-boot-on; |
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}; |
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ldo4_reg: ldo4 { |
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regulator-min-microvolt = <3023250>; |
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regulator-max-microvolt = <3023250>; |
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lltc,fb-voltage-divider = <634000 200000>; |
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regulator-boot-on; |
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regulator-always-on; |
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}; |
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}; |
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};
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