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111 lines
4.0 KiB
111 lines
4.0 KiB
Binding for Maxim MAX77802 regulators |
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This is a part of device tree bindings of MAX77802 multi-function device. |
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More information can be found in bindings/mfd/max77802.txt file. |
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The MAX77802 PMIC has 10 high-efficiency Buck and 32 Low-dropout (LDO) |
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regulators that can be controlled over I2C. |
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Following properties should be present in main device node of the MFD chip. |
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Optional properties: |
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- inb1-supply: The input supply for BUCK1 |
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- inb2-supply: The input supply for BUCK2 |
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- inb3-supply: The input supply for BUCK3 |
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- inb4-supply: The input supply for BUCK4 |
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- inb5-supply: The input supply for BUCK5 |
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- inb6-supply: The input supply for BUCK6 |
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- inb7-supply: The input supply for BUCK7 |
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- inb8-supply: The input supply for BUCK8 |
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- inb9-supply: The input supply for BUCK9 |
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- inb10-supply: The input supply for BUCK10 |
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- inl1-supply: The input supply for LDO8 and LDO15 |
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- inl2-supply: The input supply for LDO17, LDO27, LDO30 and LDO35 |
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- inl3-supply: The input supply for LDO3, LDO5, LDO6 and LDO7 |
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- inl4-supply: The input supply for LDO10, LDO11, LDO13 and LDO14 |
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- inl5-supply: The input supply for LDO9 and LDO19 |
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- inl6-supply: The input supply for LDO4, LDO21, LDO24 and LDO33 |
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- inl7-supply: The input supply for LDO18, LDO20, LDO28 and LDO29 |
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- inl9-supply: The input supply for LDO12, LDO23, LDO25, LDO26, LDO32 and LDO34 |
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- inl10-supply: The input supply for LDO1 and LDO2 |
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Optional nodes: |
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- regulators : The regulators of max77802 have to be instantiated |
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under subnode named "regulators" using the following format. |
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regulator-name { |
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standard regulator constraints.... |
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}; |
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refer Documentation/devicetree/bindings/regulator/regulator.txt |
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The regulator node name should be initialized with a string to get matched |
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with their hardware counterparts as follow. The valid names are: |
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-LDOn : for LDOs, where n can lie in ranges 1-15, 17-21, 23-30 |
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and 32-35. |
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example: LDO1, LDO2, LDO35. |
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-BUCKn : for BUCKs, where n can lie in range 1 to 10. |
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example: BUCK1, BUCK5, BUCK10. |
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The max77802 regulator supports two different operating modes: Normal and Low |
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Power Mode. Some regulators support the modes to be changed at startup or by |
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the consumers during normal operation while others only support to change the |
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mode during system suspend. The standard regulator suspend states binding can |
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be used to configure the regulator operating mode. |
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The regulators that support the standard "regulator-initial-mode" property, |
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changing their mode during normal operation are: LDOs 1, 3, 20 and 21. |
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The possible values for "regulator-initial-mode" and "regulator-mode" are: |
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1: Normal regulator voltage output mode. |
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3: Low Power which reduces the quiescent current down to only 1uA |
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The valid modes list is defined in the dt-bindings/regulator/maxim,max77802.h |
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header and can be included by device tree source files. |
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The standard "regulator-mode" property can only be used for regulators that |
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support changing their mode to Low Power Mode during suspend. These regulators |
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are: BUCKs 2-4 and LDOs 1-35. Also, it only takes effect if the regulator has |
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been enabled for the given suspend state using "regulator-on-in-suspend" and |
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has not been disabled for that state using "regulator-off-in-suspend". |
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Example: |
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max77802@9 { |
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compatible = "maxim,max77802"; |
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interrupt-parent = <&wakeup_eint>; |
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interrupts = <26 0>; |
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reg = <0x09>; |
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#address-cells = <1>; |
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#size-cells = <0>; |
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inb1-supply = <&parent_reg>; |
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regulators { |
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ldo1_reg: LDO1 { |
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regulator-name = "vdd_1v0"; |
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regulator-min-microvolt = <1000000>; |
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regulator-max-microvolt = <1000000>; |
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regulator-always-on; |
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regulator-initial-mode = <MAX77802_OPMODE_LP>; |
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}; |
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ldo11_reg: LDO11 { |
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regulator-name = "vdd_ldo11"; |
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regulator-min-microvolt = <1900000>; |
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regulator-max-microvolt = <1900000>; |
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regulator-always-on; |
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regulator-state-mem { |
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regulator-on-in-suspend; |
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regulator-mode = <MAX77802_OPMODE_LP>; |
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}; |
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}; |
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buck1_reg: BUCK1 { |
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regulator-name = "vdd_mif"; |
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regulator-min-microvolt = <950000>; |
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regulator-max-microvolt = <1300000>; |
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regulator-always-on; |
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regulator-boot-on; |
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}; |
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};
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