Javier Martinez Canillas | 4ece7045 | 2014-08-18 10:32:42 +0200 | [diff] [blame] | 1 | Binding for Maxim MAX77802 regulators |
| 2 | |
| 3 | This is a part of device tree bindings of MAX77802 multi-function device. |
| 4 | More information can be found in bindings/mfd/max77802.txt file. |
| 5 | |
| 6 | The MAX77802 PMIC has 10 high-efficiency Buck and 32 Low-dropout (LDO) |
| 7 | regulators that can be controlled over I2C. |
| 8 | |
| 9 | Following properties should be present in main device node of the MFD chip. |
| 10 | |
Javier Martinez Canillas | f40eb91 | 2015-10-05 17:07:23 +0200 | [diff] [blame] | 11 | Optional properties: |
| 12 | - inb1-supply: The input supply for BUCK1 |
| 13 | - inb2-supply: The input supply for BUCK2 |
| 14 | - inb3-supply: The input supply for BUCK3 |
| 15 | - inb4-supply: The input supply for BUCK4 |
| 16 | - inb5-supply: The input supply for BUCK5 |
| 17 | - inb6-supply: The input supply for BUCK6 |
| 18 | - inb7-supply: The input supply for BUCK7 |
| 19 | - inb8-supply: The input supply for BUCK8 |
| 20 | - inb9-supply: The input supply for BUCK9 |
| 21 | - inb10-supply: The input supply for BUCK10 |
| 22 | - inl1-supply: The input supply for LDO8 and LDO15 |
| 23 | - inl2-supply: The input supply for LDO17, LDO27, LDO30 and LDO35 |
| 24 | - inl3-supply: The input supply for LDO3, LDO5, LDO6 and LDO7 |
| 25 | - inl4-supply: The input supply for LDO10, LDO11, LDO13 and LDO14 |
| 26 | - inl5-supply: The input supply for LDO9 and LDO19 |
| 27 | - inl6-supply: The input supply for LDO4, LDO21, LDO24 and LDO33 |
| 28 | - inl7-supply: The input supply for LDO18, LDO20, LDO28 and LDO29 |
| 29 | - inl9-supply: The input supply for LDO12, LDO23, LDO25, LDO26, LDO32 and LDO34 |
| 30 | - inl10-supply: The input supply for LDO1 and LDO2 |
Javier Martinez Canillas | 45d5ea4 | 2015-10-05 19:35:24 +0200 | [diff] [blame] | 31 | |
| 32 | Optional nodes: |
Javier Martinez Canillas | 4ece7045 | 2014-08-18 10:32:42 +0200 | [diff] [blame] | 33 | - regulators : The regulators of max77802 have to be instantiated |
| 34 | under subnode named "regulators" using the following format. |
| 35 | |
| 36 | regulator-name { |
| 37 | standard regulator constraints.... |
| 38 | }; |
| 39 | refer Documentation/devicetree/bindings/regulator/regulator.txt |
| 40 | |
| 41 | The regulator node name should be initialized with a string to get matched |
| 42 | with their hardware counterparts as follow. The valid names are: |
| 43 | |
| 44 | -LDOn : for LDOs, where n can lie in ranges 1-15, 17-21, 23-30 |
| 45 | and 32-35. |
| 46 | example: LDO1, LDO2, LDO35. |
| 47 | -BUCKn : for BUCKs, where n can lie in range 1 to 10. |
| 48 | example: BUCK1, BUCK5, BUCK10. |
Javier Martinez Canillas | bf66c48 | 2014-11-11 13:04:43 +0100 | [diff] [blame] | 49 | |
| 50 | The max77802 regulator supports two different operating modes: Normal and Low |
| 51 | Power Mode. Some regulators support the modes to be changed at startup or by |
| 52 | the consumers during normal operation while others only support to change the |
| 53 | mode during system suspend. The standard regulator suspend states binding can |
| 54 | be used to configure the regulator operating mode. |
| 55 | |
| 56 | The regulators that support the standard "regulator-initial-mode" property, |
| 57 | changing their mode during normal operation are: LDOs 1, 3, 20 and 21. |
| 58 | |
| 59 | The possible values for "regulator-initial-mode" and "regulator-mode" are: |
| 60 | 1: Normal regulator voltage output mode. |
| 61 | 3: Low Power which reduces the quiescent current down to only 1uA |
| 62 | |
Javier Martinez Canillas | e0d9b7c | 2016-01-29 13:09:00 -0300 | [diff] [blame] | 63 | The valid modes list is defined in the dt-bindings/regulator/maxim,max77802.h |
Javier Martinez Canillas | bf66c48 | 2014-11-11 13:04:43 +0100 | [diff] [blame] | 64 | header and can be included by device tree source files. |
| 65 | |
| 66 | The standard "regulator-mode" property can only be used for regulators that |
| 67 | support changing their mode to Low Power Mode during suspend. These regulators |
| 68 | are: BUCKs 2-4 and LDOs 1-35. Also, it only takes effect if the regulator has |
| 69 | been enabled for the given suspend state using "regulator-on-in-suspend" and |
| 70 | has not been disabled for that state using "regulator-off-in-suspend". |
| 71 | |
Javier Martinez Canillas | 4ece7045 | 2014-08-18 10:32:42 +0200 | [diff] [blame] | 72 | Example: |
| 73 | |
Marco Franchi | 48c926c | 2017-11-08 14:27:48 -0200 | [diff] [blame] | 74 | max77802@9 { |
Javier Martinez Canillas | 4ece7045 | 2014-08-18 10:32:42 +0200 | [diff] [blame] | 75 | compatible = "maxim,max77802"; |
| 76 | interrupt-parent = <&wakeup_eint>; |
| 77 | interrupts = <26 0>; |
| 78 | reg = <0x09>; |
| 79 | #address-cells = <1>; |
| 80 | #size-cells = <0>; |
| 81 | |
Javier Martinez Canillas | f40eb91 | 2015-10-05 17:07:23 +0200 | [diff] [blame] | 82 | inb1-supply = <&parent_reg>; |
| 83 | |
Javier Martinez Canillas | 4ece7045 | 2014-08-18 10:32:42 +0200 | [diff] [blame] | 84 | regulators { |
Javier Martinez Canillas | bf66c48 | 2014-11-11 13:04:43 +0100 | [diff] [blame] | 85 | ldo1_reg: LDO1 { |
| 86 | regulator-name = "vdd_1v0"; |
| 87 | regulator-min-microvolt = <1000000>; |
| 88 | regulator-max-microvolt = <1000000>; |
| 89 | regulator-always-on; |
| 90 | regulator-initial-mode = <MAX77802_OPMODE_LP>; |
| 91 | }; |
| 92 | |
Javier Martinez Canillas | 4ece7045 | 2014-08-18 10:32:42 +0200 | [diff] [blame] | 93 | ldo11_reg: LDO11 { |
| 94 | regulator-name = "vdd_ldo11"; |
| 95 | regulator-min-microvolt = <1900000>; |
| 96 | regulator-max-microvolt = <1900000>; |
| 97 | regulator-always-on; |
Javier Martinez Canillas | bf66c48 | 2014-11-11 13:04:43 +0100 | [diff] [blame] | 98 | regulator-state-mem { |
| 99 | regulator-on-in-suspend; |
| 100 | regulator-mode = <MAX77802_OPMODE_LP>; |
| 101 | }; |
Javier Martinez Canillas | 4ece7045 | 2014-08-18 10:32:42 +0200 | [diff] [blame] | 102 | }; |
| 103 | |
| 104 | buck1_reg: BUCK1 { |
| 105 | regulator-name = "vdd_mif"; |
| 106 | regulator-min-microvolt = <950000>; |
| 107 | regulator-max-microvolt = <1300000>; |
| 108 | regulator-always-on; |
| 109 | regulator-boot-on; |
| 110 | }; |
| 111 | }; |