diff options
author | Emmanuel Vadot <manu@FreeBSD.org> | 2017-03-07 12:41:06 +0000 |
---|---|---|
committer | Emmanuel Vadot <manu@FreeBSD.org> | 2017-03-07 12:41:06 +0000 |
commit | ff018dbf5bb142aa83bd955e5b6c55d66e9e9c1e (patch) | |
tree | 5cd0b74d984dae06ea54b6b09998163538d3c162 /Bindings/regulator/ltc3676.txt | |
parent | c7716441be3a4a48aa7b7cdf69a15625c1cd8ef5 (diff) |
Update to Linux 4.10vendor/device-tree/4.10
Notes
Notes:
svn path=/vendor/device-tree/dist/; revision=314847
svn path=/vendor/device-tree/4.10/; revision=314848; tag=vendor/device-tree/4.10
Diffstat (limited to 'Bindings/regulator/ltc3676.txt')
-rw-r--r-- | Bindings/regulator/ltc3676.txt | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/Bindings/regulator/ltc3676.txt b/Bindings/regulator/ltc3676.txt new file mode 100644 index 000000000000..d4eb366ce18c --- /dev/null +++ b/Bindings/regulator/ltc3676.txt @@ -0,0 +1,94 @@ +Linear Technology LTC3676 8-output regulators + +Required properties: +- compatible: "lltc,ltc3676" +- reg: I2C slave address + +Required child node: +- regulators: Contains eight regulator child nodes sw1, sw2, sw3, sw4, + 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, sw4, ldo1, ldo2 and ldo4 additionally need to specify +the resistor values of their external feedback voltage dividers: + +Required properties (not on ldo3): +- 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, sw4 can regulate the feedback reference from: +412.5mV to 800mV in 12.5 mV steps. The output voltage thus ranges between +0.4125 * (1 + R1/R2) V and 0.8 * (1 + R1/R2) V. + +Regulators ldo1, ldo2, and ldo4 have a fixed 0.725 V reference and thus output +0.725 * (1 + R1/R2) V. The ldo3 regulator is fixed to 1.8 V. The ldo1 standby +regulator can not be disabled and thus should have the regulator-always-on +property set. + +Example: + + ltc3676: pmic@3c { + compatible = "lltc,ltc3676"; + reg = <0x3c>; + + regulators { + sw1_reg: sw1 { + regulator-min-microvolt = <674400>; + regulator-max-microvolt = <1308000>; + lltc,fb-voltage-divider = <127000 200000>; + regulator-ramp-delay = <7000>; + regulator-boot-on; + regulator-always-on; + }; + + sw2_reg: sw2 { + regulator-min-microvolt = <1033310>; + regulator-max-microvolt = <200400>; + lltc,fb-voltage-divider = <301000 200000>; + regulator-ramp-delay = <7000>; + regulator-boot-on; + regulator-always-on; + }; + + sw3_reg: sw3 { + regulator-min-microvolt = <674400>; + regulator-max-microvolt = <130800>; + lltc,fb-voltage-divider = <127000 200000>; + regulator-ramp-delay = <7000>; + regulator-boot-on; + regulator-always-on; + }; + + sw4_reg: sw4 { + regulator-min-microvolt = <868310>; + regulator-max-microvolt = <168400>; + lltc,fb-voltage-divider = <221000 200000>; + regulator-ramp-delay = <7000>; + regulator-boot-on; + regulator-always-on; + }; + + ldo2_reg: ldo2 { + regulator-min-microvolt = <2490375>; + regulator-max-microvolt = <2490375>; + lltc,fb-voltage-divider = <487000 200000>; + regulator-boot-on; + regulator-always-on; + }; + + ldo3_reg: ldo3 { + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <1800000>; + regulator-boot-on; + }; + + ldo4_reg: ldo4 { + regulator-min-microvolt = <3023250>; + regulator-max-microvolt = <3023250>; + lltc,fb-voltage-divider = <634000 200000>; + regulator-boot-on; + regulator-always-on; + }; + }; + }; |