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1 | | -Voltage/Current Regulators |
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2 | | - |
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3 | | -Optional properties: |
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4 | | -- regulator-name: A string used as a descriptive name for regulator outputs |
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5 | | -- regulator-min-microvolt: smallest voltage consumers may set |
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6 | | -- regulator-max-microvolt: largest voltage consumers may set |
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7 | | -- regulator-microvolt-offset: Offset applied to voltages to compensate for voltage drops |
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8 | | -- regulator-min-microamp: smallest current consumers may set |
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9 | | -- regulator-max-microamp: largest current consumers may set |
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10 | | -- regulator-input-current-limit-microamp: maximum input current regulator allows |
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11 | | -- regulator-always-on: boolean, regulator should never be disabled |
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12 | | -- regulator-boot-on: bootloader/firmware enabled regulator |
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13 | | -- regulator-allow-bypass: allow the regulator to go into bypass mode |
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14 | | -- regulator-allow-set-load: allow the regulator performance level to be configured |
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15 | | -- <name>-supply: phandle to the parent supply/regulator node |
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16 | | -- regulator-ramp-delay: ramp delay for regulator(in uV/us) |
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17 | | - For hardware which supports disabling ramp rate, it should be explicitly |
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18 | | - initialised to zero (regulator-ramp-delay = <0>) for disabling ramp delay. |
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19 | | -- regulator-enable-ramp-delay: The time taken, in microseconds, for the supply |
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20 | | - rail to reach the target voltage, plus/minus whatever tolerance the board |
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21 | | - design requires. This property describes the total system ramp time |
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22 | | - required due to the combination of internal ramping of the regulator itself, |
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23 | | - and board design issues such as trace capacitance and load on the supply. |
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24 | | -- regulator-settling-time-us: Settling time, in microseconds, for voltage |
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25 | | - change if regulator have the constant time for any level voltage change. |
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26 | | - This is useful when regulator have exponential voltage change. |
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27 | | -- regulator-settling-time-up-us: Settling time, in microseconds, for voltage |
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28 | | - increase if the regulator needs a constant time to settle after voltage |
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29 | | - increases of any level. This is useful for regulators with exponential |
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30 | | - voltage changes. |
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31 | | -- regulator-settling-time-down-us: Settling time, in microseconds, for voltage |
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32 | | - decrease if the regulator needs a constant time to settle after voltage |
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33 | | - decreases of any level. This is useful for regulators with exponential |
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34 | | - voltage changes. |
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35 | | -- regulator-soft-start: Enable soft start so that voltage ramps slowly |
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36 | | -- regulator-state-mem sub-root node for Suspend-to-RAM mode |
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37 | | - : suspend to memory, the device goes to sleep, but all data stored in memory, |
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38 | | - only some external interrupt can wake the device. |
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39 | | -- regulator-state-disk sub-root node for Suspend-to-DISK mode |
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40 | | - : suspend to disk, this state operates similarly to Suspend-to-RAM, |
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41 | | - but includes a final step of writing memory contents to disk. |
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42 | | -- regulator-state-[mem/disk] node has following common properties: |
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43 | | - - regulator-on-in-suspend: regulator should be on in suspend state. |
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44 | | - - regulator-off-in-suspend: regulator should be off in suspend state. |
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45 | | - - regulator-suspend-min-microvolt: minimum voltage may be set in |
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46 | | - suspend state. |
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47 | | - - regulator-suspend-max-microvolt: maximum voltage may be set in |
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48 | | - suspend state. |
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49 | | - - regulator-suspend-microvolt: the default voltage which regulator |
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50 | | - would be set in suspend. This property is now deprecated, instead |
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51 | | - setting voltage for suspend mode via the API which regulator |
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52 | | - driver provides is recommended. |
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53 | | - - regulator-changeable-in-suspend: whether the default voltage and |
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54 | | - the regulator on/off in suspend can be changed in runtime. |
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55 | | - - regulator-mode: operating mode in the given suspend state. |
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56 | | - The set of possible operating modes depends on the capabilities of |
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57 | | - every hardware so the valid modes are documented on each regulator |
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58 | | - device tree binding document. |
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59 | | -- regulator-initial-mode: initial operating mode. The set of possible operating |
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60 | | - modes depends on the capabilities of every hardware so each device binding |
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61 | | - documentation explains which values the regulator supports. |
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62 | | -- regulator-allowed-modes: list of operating modes that software is allowed to |
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63 | | - configure for the regulator at run-time. Elements may be specified in any |
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64 | | - order. The set of possible operating modes depends on the capabilities of |
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65 | | - every hardware so each device binding document explains which values the |
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66 | | - regulator supports. |
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67 | | -- regulator-system-load: Load in uA present on regulator that is not captured by |
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68 | | - any consumer request. |
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69 | | -- regulator-pull-down: Enable pull down resistor when the regulator is disabled. |
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70 | | -- regulator-over-current-protection: Enable over current protection. |
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71 | | -- regulator-active-discharge: tristate, enable/disable active discharge of |
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72 | | - regulators. The values are: |
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73 | | - 0: Disable active discharge. |
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74 | | - 1: Enable active discharge. |
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75 | | - Absence of this property will leave configuration to default. |
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76 | | -- regulator-coupled-with: Regulators with which the regulator |
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77 | | - is coupled. The linkage is 2-way - all coupled regulators should be linked |
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78 | | - with each other. A regulator should not be coupled with its supplier. |
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79 | | -- regulator-coupled-max-spread: Max spread between voltages of coupled regulators |
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80 | | - in microvolts. |
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81 | | - |
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82 | | -Deprecated properties: |
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83 | | -- regulator-compatible: If a regulator chip contains multiple |
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84 | | - regulators, and if the chip's binding contains a child node that |
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85 | | - describes each regulator, then this property indicates which regulator |
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86 | | - this child node is intended to configure. If this property is missing, |
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87 | | - the node's name will be used instead. |
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88 | | - |
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89 | | -Example: |
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90 | | - |
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91 | | - xyzreg: regulator@0 { |
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92 | | - regulator-min-microvolt = <1000000>; |
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93 | | - regulator-max-microvolt = <2500000>; |
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94 | | - regulator-always-on; |
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95 | | - vin-supply = <&vin>; |
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96 | | - |
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97 | | - regulator-state-mem { |
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98 | | - regulator-on-in-suspend; |
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99 | | - }; |
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100 | | - }; |
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101 | | - |
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102 | | -Regulator Consumers: |
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103 | | -Consumer nodes can reference one or more of its supplies/ |
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104 | | -regulators using the below bindings. |
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105 | | - |
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106 | | -- <name>-supply: phandle to the regulator node |
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107 | | - |
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108 | | -These are the same bindings that a regulator in the above |
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109 | | -example used to reference its own supply, in which case |
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110 | | -its just seen as a special case of a regulator being a |
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111 | | -consumer itself. |
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112 | | - |
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113 | | -Example of a consumer device node (mmc) referencing two |
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114 | | -regulators (twl_reg1 and twl_reg2), |
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115 | | - |
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116 | | - twl_reg1: regulator@0 { |
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117 | | - ... |
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118 | | - ... |
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119 | | - ... |
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120 | | - }; |
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121 | | - |
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122 | | - twl_reg2: regulator@1 { |
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123 | | - ... |
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124 | | - ... |
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125 | | - ... |
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126 | | - }; |
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127 | | - |
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128 | | - mmc: mmc@0 { |
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129 | | - ... |
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130 | | - ... |
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131 | | - vmmc-supply = <&twl_reg1>; |
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132 | | - vmmcaux-supply = <&twl_reg2>; |
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133 | | - }; |
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| 1 | +This file has moved to regulator.yaml. |
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