From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- .../devicetree/bindings/regulator/max77802.txt | 88 ++++++++++++++++++++++ 1 file changed, 88 insertions(+) create mode 100644 Documentation/devicetree/bindings/regulator/max77802.txt (limited to 'Documentation/devicetree/bindings/regulator/max77802.txt') diff --git a/Documentation/devicetree/bindings/regulator/max77802.txt b/Documentation/devicetree/bindings/regulator/max77802.txt new file mode 100644 index 000000000..79e547644 --- /dev/null +++ b/Documentation/devicetree/bindings/regulator/max77802.txt @@ -0,0 +1,88 @@ +Binding for Maxim MAX77802 regulators + +This is a part of device tree bindings of MAX77802 multi-function device. +More information can be found in bindings/mfd/max77802.txt file. + +The MAX77802 PMIC has 10 high-efficiency Buck and 32 Low-dropout (LDO) +regulators that can be controlled over I2C. + +Following properties should be present in main device node of the MFD chip. + +Optional node: +- regulators : The regulators of max77802 have to be instantiated + under subnode named "regulators" using the following format. + + regulator-name { + standard regulator constraints.... + }; + refer Documentation/devicetree/bindings/regulator/regulator.txt + +The regulator node name should be initialized with a string to get matched +with their hardware counterparts as follow. The valid names are: + + -LDOn : for LDOs, where n can lie in ranges 1-15, 17-21, 23-30 + and 32-35. + example: LDO1, LDO2, LDO35. + -BUCKn : for BUCKs, where n can lie in range 1 to 10. + example: BUCK1, BUCK5, BUCK10. + +The max77802 regulator supports two different operating modes: Normal and Low +Power Mode. Some regulators support the modes to be changed at startup or by +the consumers during normal operation while others only support to change the +mode during system suspend. The standard regulator suspend states binding can +be used to configure the regulator operating mode. + +The regulators that support the standard "regulator-initial-mode" property, +changing their mode during normal operation are: LDOs 1, 3, 20 and 21. + +The possible values for "regulator-initial-mode" and "regulator-mode" are: + 1: Normal regulator voltage output mode. + 3: Low Power which reduces the quiescent current down to only 1uA + +The list of valid modes are defined in the dt-bindings/clock/maxim,max77802.h +header and can be included by device tree source files. + +The standard "regulator-mode" property can only be used for regulators that +support changing their mode to Low Power Mode during suspend. These regulators +are: BUCKs 2-4 and LDOs 1-35. Also, it only takes effect if the regulator has +been enabled for the given suspend state using "regulator-on-in-suspend" and +has not been disabled for that state using "regulator-off-in-suspend". + +Example: + + max77802@09 { + compatible = "maxim,max77802"; + interrupt-parent = <&wakeup_eint>; + interrupts = <26 0>; + reg = <0x09>; + #address-cells = <1>; + #size-cells = <0>; + + regulators { + ldo1_reg: LDO1 { + regulator-name = "vdd_1v0"; + regulator-min-microvolt = <1000000>; + regulator-max-microvolt = <1000000>; + regulator-always-on; + regulator-initial-mode = ; + }; + + ldo11_reg: LDO11 { + regulator-name = "vdd_ldo11"; + regulator-min-microvolt = <1900000>; + regulator-max-microvolt = <1900000>; + regulator-always-on; + regulator-state-mem { + regulator-on-in-suspend; + regulator-mode = ; + }; + }; + + buck1_reg: BUCK1 { + regulator-name = "vdd_mif"; + regulator-min-microvolt = <950000>; + regulator-max-microvolt = <1300000>; + regulator-always-on; + regulator-boot-on; + }; + }; -- cgit v1.2.3-54-g00ecf