| Qualcomm Technologies, Inc. CPR3 Regulator - Platform Independent Bindings |
| |
| Core Power Reduction (CPR) version 3 controllers are used by some Qualcomm |
| Technologies, Inc. (QTI) SoCs to manage important voltage regulators. CPR3 |
| controllers are capable of monitoring several ring oscillator sensing loops |
| simultaneously. The CPR3 controller informs software when the silicon |
| conditions require the supply voltage to be increased or decreased. On certain |
| supply rails, the CPR3 controller is able to propagate the voltage increase |
| or decrease requests all the way to the PMIC without software involvement. |
| |
| This document describes the common platform independent bindings that apply |
| to all CPR3 controllers. |
| |
| ======================= |
| Required Node Structure |
| ======================= |
| |
| CPR3 regulators must be described in three levels of devices nodes. The first |
| level describes the CPR3 controller. The second level describes one or more |
| hardware threads managed by the controller. The third level describes one or |
| more logical regulators handled by each CPR thread. |
| |
| ==================================== |
| First Level Nodes - CPR3 Controllers |
| ==================================== |
| |
| Platform independent properties: |
| - compatible |
| Usage: required |
| Value type: <string> |
| Definition: The value to use for this property is defined in the |
| platform specific cpr3-regulator binding documentation |
| files. |
| |
| - reg |
| Usage: required |
| Value type: <prop-encoded-array> |
| Definition: Addresses and sizes for the memory of the CPR3 controller, |
| the first fuse row, and optionally the SAW module and/or a |
| register used to check if aging measurements are possible. |
| |
| - reg-names |
| Usage: required |
| Value type: <stringlist> |
| Definition: Address names. Must include "cpr_ctrl" and "fuse_base". |
| "aging_allowed" and "saw" may also be specified. The |
| strings must be specified in the same order as the |
| corresponding addresses are specified in the reg property. |
| |
| - qcom,cpr-ctrl-name |
| Usage: required |
| Value type: <string> |
| Definition: Name for this CPR controller |
| |
| - vdd-supply |
| Usage: required |
| Value type: <phandle> |
| Definition: phandle of the underlying regulator device that is managed |
| by this CPR controller. |
| |
| - system-supply |
| Usage: optional |
| Value type: <phandle> |
| Definition: phandle of the system-level regulator device which the |
| vdd-supply depends upon. Requests for this regulator must |
| be made before increasing the vdd-supply voltage and after |
| decreasing the vdd-supply voltage. |
| |
| - mem-acc-supply |
| Usage: optional |
| Value type: <phandle> |
| Definition: phandle of the mem-acc regulator device which is used to |
| configure memory array circuitry settings based upon |
| the performance operating point. Requests for this regulator |
| must be made before decreasing the vdd-supply voltage and |
| after increasing the vdd-supply voltage. |
| |
| - clocks |
| Usage: optional |
| Value type: <prop-encoded-array> |
| Definition: Array of clock tuples in which each tuple consists of a |
| phandle to a clock device and a clock ID number. The CPR3 |
| core clock must be specified for some targets. See platform |
| specific cpr3-regulator binding documentation for additional |
| clocks that may also need to be specified. |
| |
| - clock-names |
| Usage: optional |
| Value type: <stringlist> |
| Definition: Clock names. This list must match up 1-to-1 with the clocks |
| specified in the 'clocks' property. "core_clk" must be |
| specified for some platforms. Other clocks may be required |
| for some platforms. |
| |
| - interrupts |
| Usage: required |
| Value type: <prop-encoded-array> |
| Definition: CPR interrupt specifier and optionally a hardware |
| closed-loop ceiling interrupt specifier. |
| |
| - interrupt-names |
| Usage: required |
| Value type: <stringlist> |
| Definition: Interrupt names. This list must match up 1-to-1 with the |
| interrupts specified in the 'interrupts' property. "cpr" |
| must be specified. "ceiling" may be specified for some |
| platforms. |
| |
| - qcom,cpr-interrupt-affinity |
| Usage: optional |
| Value type: <prop-encoded-array> |
| Definition: A list of CPU phandles which correspond to the cores that |
| the "cpr" interrupt should have affinity for. |
| |
| - qcom,cpr-sensor-time |
| Usage: required |
| Value type: <u32> |
| Definition: The time in nanoseconds that each CPR sensor within the |
| sensing loop takes to perform a measurement. |
| |
| - qcom,cpr-loop-time |
| Usage: required |
| Value type: <u32> |
| Definition: The time in nanoseconds between consecutive CPR |
| measurements. |
| |
| - qcom,cpr-idle-cycles |
| Usage: required |
| Value type: <u32> |
| Definition: The number of CPR core clock cycles for the CPR controller |
| to wait in transitional states. |
| Supported values: 0 - 31. |
| |
| - qcom,voltage-step |
| Usage: required |
| Value type: <u32> |
| Definition: The voltage in microvolts of a single step of the VDD supply |
| regulator being controlled by CPR. |
| |
| - qcom,cpr-step-quot-init-min |
| Usage: required |
| Value type: <u32> |
| Definition: The default minimum CPR step quotient value. The step |
| quotient is the number of additional ring oscillator ticks |
| observed for each qcom,voltage-step increase in vdd-supply |
| output voltage. Supported values: 0 - 63. |
| |
| - qcom,cpr-step-quot-init-max |
| Usage: required |
| Value type: <u32> |
| Definition: The default maximum CPR step quotient value. |
| Supported values: 0 - 63. |
| |
| - qcom,cpr-count-mode |
| Usage: required |
| Value type: <u32> |
| Definition: The CPR counting mode to use during CPR measurements. |
| Supported values: |
| 0 - Read all sensors at once and use the minimum |
| quotient value observed in repeated measurements. |
| 1 - Read all sensors at once and use the maximum |
| quotient value observed in repeated measurements. |
| 2 - Read each sensor once in a sequential, staggered |
| fashion. |
| |
| - qcom,cpr-count-repeat |
| Usage: optional |
| Value type: <u32> |
| Definition: The number of times to read CPR sensors during a single CPR |
| measurement when using one of the all-at-once count modes. |
| |
| - qcom,cpr-enable |
| Usage: optional |
| Value type: <empty> |
| Definition: Boolean flag which indicates that the CPR3 controller |
| should operate in closed-loop mode (i.e. CPR sensing loop |
| enabled) as opposed to open-loop mode (i.e. CPR sensing loop |
| disabled) by default. |
| |
| - qcom,cpr-aging-ref-voltage |
| Usage: required if qcom,allow-aging-voltage-adjustment is specified |
| for any third level nodes |
| Value type: <u32> |
| Definition: Specifies the CPR aging reference voltage in microvolts. |
| This is the voltage that vdd-supply must be set to when |
| performing an aging measurement. |
| |
| - qcom,cpr-aging-allowed-reg-mask |
| Usage: required if "aging_allowed" register is specified |
| Value type: <u32> |
| Definition: Bitmask used to mask off the "aging_allowed" register. |
| |
| - qcom,cpr-aging-allowed-reg-value |
| Usage: required if "aging_allowed" register is specified |
| Value type: <u32> |
| Definition: Value required in the masked off "aging_allowed" register |
| bits in order for a CPR aging measurement to be possible. |
| |
| - qcom,cpr-ignore-invalid-fuses |
| Usage: optional |
| Value type: <empty> |
| Definition: Boolean flag which indicates that software should ignore |
| invalid fuse values. This should only be used on simulator |
| targets in which fuses are not initialized. |
| |
| - qcom,cpr-panic-reg-addr-list |
| Usage: optional |
| Value type: <prop-encoded-array> |
| Definition: Array of register addresses to be dumped when device resets. |
| |
| - qcom,cpr-panic-reg-name-list |
| Usage: optional, though only meaningful if |
| qcom,cpr-panic-reg-addr-list is specified |
| Value type: <prop-encoded-array> |
| Definition: Address names. Must be specified in the same order |
| as the corresponding addresses are specified in |
| the qcom,cpr-panic-reg-addr-list property. |
| |
| - qcom,cpr-reset-step-quot-loop-en |
| Usage: optional; only meaningful for CPR4 and CPRh controllers |
| Value type: <empty> |
| Definition: Boolean value which indicates that the CPR controller should |
| be configured to reset step_quot on each loop_en = 0 |
| transition. This configuration allows the CPR controller to |
| first use the default step_quot and then later switch to the |
| run-time calibrated step_quot. |
| |
| - qcom,saw-avs-ctrl |
| Usage: required if "saw" registers are specified by reg and |
| reg-names properties |
| Value type: <u32> |
| Definition: SAW AVS_CTL register value to program at initialization time |
| in order to allow hardware closed-loop CPR voltage change |
| requests to reach the PMIC regulator. |
| |
| - qcom,saw-avs-limit |
| Usage: required if "saw" registers are specified by reg and |
| reg-names properties |
| Value type: <u32> |
| Definition: SAW AVS_LIMIT register value to program at initialization |
| time in order to allow hardware closed-loop CPR voltage |
| change requests to reach the PMIC regulator. |
| |
| - qcom,cpr-thread-has-always-vote-en |
| Usage: optional; only meaningful for CPR4 controller |
| Value type: <empty> |
| Definition: Boolean value which indicates that the CPR controller should |
| be configured to keep thread vote always enabled. This |
| configuration allows the CPR controller to not consider |
| MID/DN recommendations from other thread when all sensors |
| mapped to a thread collapsed. |
| |
| ================================================= |
| Second Level Nodes - CPR Threads for a Controller |
| ================================================= |
| |
| Platform independent properties: |
| - qcom,cpr-thread-id |
| Usage: required |
| Value type: <u32> |
| Definition: Specifies the hardware thread ID of this thread within the |
| CPR controller. |
| |
| - qcom,cpr-consecutive-up |
| Usage: required |
| Value type: <u32> |
| Definition: The number of consecutive CPR step up events needed to |
| to trigger an up interrupt. Supported values: 0 - 15. |
| |
| - qcom,cpr-consecutive-down |
| Usage: required |
| Value type: <u32> |
| Definition: The number of consecutive CPR step down events needed to |
| to trigger a down interrupt. Supported values: 0 - 15. |
| |
| - qcom,cpr-up-threshold |
| Usage: required |
| Value type: <u32> |
| Definition: The number CPR error steps required to generate an up event. |
| Supported values: 0 - 31. |
| |
| - qcom,cpr-down-threshold |
| Usage: required |
| Value type: <u32> |
| Definition: The number CPR error steps required to generate a down |
| event. Supported values: 0 - 31. |
| |
| =============================================== |
| Third Level Nodes - CPR Regulators for a Thread |
| =============================================== |
| |
| Platform independent properties: |
| - regulator-name |
| Usage: required |
| Value type: <string> |
| Definition: Specifies the name for this CPR3 regulator. |
| |
| - regulator-min-microvolt |
| Usage: required |
| Value type: <u32> |
| Definition: Minimum corner value which should be 1 to represent the |
| lowest supported corner. |
| |
| - regulator-max-microvolt |
| Usage: required |
| Value type: <u32> |
| Definition: Maximum corner value which should be equal to largest value |
| listed in qcom,cpr-corners. |
| |
| - qcom,cpr-fuse-corners |
| Usage: required |
| Value type: <u32> |
| Definition: Specifies the number of fuse corners. See platform specific |
| binding files for further requirements. |
| |
| - qcom,cpr-fuse-combos |
| Usage: required |
| Value type: <u32> |
| Definition: Specifies the number of fuse combinations being supported by |
| the device. This value is utilized by several other |
| properties. Supported values are 1 up to the maximum |
| possible for a given regulator type. See platform specific |
| binding files for further details. |
| |
| - qcom,cpr-speed-bins |
| Usage: optional |
| Value type: <u32> |
| Definition: Specifies the number of speed bins being supported by the |
| device. This value is utilized by several other properties. |
| Supported values are 1 up to the maximum possible for a |
| given regulator type. See platform specific binding files |
| for further details. |
| |
| This property can only be utilized if the number of corners |
| for all fuse combinations associated with a given speed bin |
| is the same. |
| |
| - qcom,cpr-corners |
| Usage: required |
| Value type: <prop-encoded-array> |
| Definition: A list of integers which defines how many voltage corners |
| are to be used for each fuse combination. The list must |
| contain either qcom,cpr-fuse-combos number of elements in |
| which case the corner counts are applied to fuse |
| combinations 1-to-1 or the list must contain exactly 1 |
| element which is used regardless of the fuse combination |
| found on a given chip. |
| |
| - qcom,cpr-speed-bin-corners |
| Usage: required if qcom,cpr-speed-bins is specified |
| Value type: <prop-encoded-array> |
| Definition: A list of integers which defines how many voltage corners |
| are to be used for each speed bin. The list must contain |
| qcom,cpr-speed-bins number of elements. |
| |
| - qcom,cpr-corner-fmax-map |
| Usage: required |
| Value type: <prop-encoded-array> |
| Definition: A list of integer tuples which each define the highest |
| (i.e. maximum frequency) 1-based corner value associated |
| with each fuse-corner. |
| |
| Each tuple must have a number of elements equal to the value |
| of the qcom,cpr-fuse-corners property. The elements of a |
| tuple are ordered from lowest to highest fuse corner. |
| |
| The list must contain qcom,cpr-fuse-combos number of tuples |
| in which case the tuples are matched to fuse combinations |
| 1-to-1 or qcom,cpr-speed-bins number of tuples in which case |
| the tuples are matched to speed bins 1-to-1 or exactly 1 |
| tuple which is used regardless of the fuse combination and |
| speed bin found on a given chip. |
| |
| - qcom,cpr-voltage-ceiling |
| Usage: required |
| Value type: <prop-encoded-array> |
| Definition: A list of integer tuples which each define the CPR ceiling |
| voltage in microvolts for each voltage corner in order from |
| lowest to highest. |
| |
| The list must contain qcom,cpr-fuse-combos number of tuples |
| in which case the tuples are matched to fuse combinations |
| 1-to-1 or qcom,cpr-speed-bins number of tuples in which case |
| the tuples are matched to speed bins 1-to-1 or exactly 1 |
| tuple which is used regardless of the fuse combination and |
| speed bin found on a given chip. |
| |
| Each tuple must be of the length defined in the |
| corresponding element of the qcom,cpr-corners property or |
| the qcom,cpr-speed-bins property. A single tuple may only |
| be specified if all of the corner counts in qcom,cpr-corners |
| are the same. |
| |
| - qcom,cpr-voltage-floor |
| Usage: required |
| Value type: <prop-encoded-array> |
| Definition: A list of integer tuples which each define the CPR floor |
| voltage in microvolts for each voltage corner in order from |
| lowest to highest. |
| |
| The list and tuples must meet the same size requirements as |
| those specified for qcom,cpr-voltage-ceiling above. |
| |
| - qcom,cpr-floor-to-ceiling-max-range |
| Usage: optional |
| Value type: <prop-encoded-array> |
| Definition: A list of integer tuples which each define the maximum |
| allowed difference between the final floor voltage and the |
| final ceiling voltage in microvolts for each voltage corner |
| in order from lowest to highest. A negative value may be |
| specified for an element to indicate that there is no |
| limitation of the floor to ceiling voltage range for the |
| corresponding corner. |
| |
| In the case that the initial floor to ceiling voltage is |
| greater than the max range specified, the floor voltage will |
| be increased in order to satisfy the max range constraint. |
| |
| The list and tuples must meet the same size requirements as |
| those specified for qcom,cpr-voltage-ceiling above. |
| |
| - qcom,system-voltage |
| Usage: optional |
| Value type: <prop-encoded-array> |
| Definition: A list of integer tuples which each define the system-supply |
| voltage in microvolts or corners or levels for each voltage |
| corner in order from lowest to highest. |
| |
| The list and tuples must meet the same size requirements as |
| those specified for qcom,cpr-voltage-ceiling above. |
| |
| - qcom,corner-frequencies |
| Usage: required |
| Value type: <prop-encoded-array> |
| Definition: A list of integer tuples which each define the CPU frequency |
| in Hertz corresponding to each voltage corner in order from |
| lowest to highest. |
| |
| The list and tuples must meet the same size requirements as |
| those specified for qcom,cpr-voltage-ceiling above. |
| |
| - qcom,allow-voltage-interpolation |
| Usage: optional |
| Value type: <empty> |
| Definition: Boolean flag which indicates that it is acceptable to use |
| interpolated open-loop voltage values. These values are |
| interpolated between the open-loop voltage Fmax fuse values. |
| |
| - qcom,cpr-scaled-open-loop-voltage-as-ceiling |
| Usage: optional |
| Value type: <empty> |
| Definition: Boolean flag which indicates that it is acceptable to use |
| the interpolated open-loop voltage for each corner as the |
| CPR ceiling voltage for each corner. |
| |
| - qcom,cpr-open-loop-voltage-fuse-adjustment |
| Usage: optional |
| Value type: <prop-encoded-array> |
| Definition: A list of integer tuples which each define the open-loop |
| voltage adjustment in microvolts for each fused voltage |
| corner in order from lowest to highest. This adjustment is |
| applied to the values read from fuses before the values are |
| used in interpolation for intermediate corners. |
| |
| The list and tuples must meet the same size requirements as |
| those specified for qcom,cpr-corner-fmax-map above. |
| |
| The open-loop voltage for a given fuse corner corresponds to |
| the voltage that is safe to use under all circumstances. |
| It is used as a starting voltage for CPR and may also be |
| specified as a ceiling voltage for CPR scaling. |
| |
| - qcom,cpr-open-loop-voltage-adjustment |
| Usage: optional |
| Value type: <prop-encoded-array> |
| Definition: A list of integer tuples which each define the open-loop |
| voltage adjustment in microvolts for each voltage corner in |
| order from lowest to highest. This adjustment is applied to |
| the open-loop voltage values after they have been |
| interpolated for intermediate corners. |
| |
| The list and tuples must meet the same size requirements as |
| those specified for qcom,cpr-voltage-ceiling above. |
| |
| - qcom,cpr-open-loop-voltage-min-diff |
| Usage: optional; only meaningful if the |
| qcom,cpr-open-loop-voltage-adjustment property is specified |
| Value type: <prop-encoded-array> |
| Definition: A list of integer tuples which each define the minimum |
| allowed open-loop voltage difference in microvolts between |
| each voltage corner and the one immediately preceding it. |
| The elements in a tuple are ordered from the lowest to the |
| highest corner. The value specified for the first corner is |
| ignored since there is no corner before it. |
| |
| Negative voltage values may be specified for this property. |
| A negative value means that the open-loop voltage of a |
| corner may be lower than that of the preceding corner. |
| |
| The minimum difference is enforced after the open-loop |
| voltage values have been interpolated for intermediate |
| corners and after adjustments have been applied. |
| |
| The list and tuples must meet the same size requirements as |
| those specified for qcom,cpr-voltage-ceiling above. |
| |
| If this property is not specified, then the minimum |
| difference is assumed to be 0 uV for all corners. |
| |
| - qcom,cpr-closed-loop-voltage-fuse-adjustment |
| Usage: optional |
| Value type: <prop-encoded-array> |
| Definition: A list of integer tuples which each define the closed-loop |
| voltage adjustment in microvolts for each fused voltage |
| corner in order from lowest to highest. This adjustment is |
| applied to the values read from fuses before the values are |
| used in interpolation for intermediate corners. |
| |
| The list and tuples must meet the same size requirements as |
| those specified for qcom,cpr-corner-fmax-map above. |
| |
| The qcom,cpr-ro-scaling-factor property must be specified in |
| order to utilize this property. |
| |
| The closed-loop voltage for a given fuse corner corresponds |
| to the voltage that the CPR controller settles the VDD |
| supply rail to based upon the programmed CPR target |
| quotients and the current silicon conditions. |
| |
| - qcom,cpr-closed-loop-voltage-adjustment |
| Usage: optional |
| Value type: <prop-encoded-array> |
| Definition: A list of integer tuples which each define the closed-loop |
| voltage adjustment in microvolts for each voltage corner in |
| order from lowest to highest. This adjustment is applied to |
| target quotient values after they have been interpolated |
| for intermediate corners. |
| |
| The list and tuples must meet the same size requirements as |
| those specified for qcom,cpr-voltage-ceiling above. |
| |
| The qcom,cpr-ro-scaling-factor property must be specified in |
| order to utilize this property. |
| |
| - qcom,cpr-ro-scaling-factor |
| Usage: required if qcom,cpr-closed-loop-voltage-fuse-adjustment, |
| qcom,cpr-closed-loop-voltage-adjustment, or |
| qcom,allow-aging-voltage-adjustment is specified |
| Value type: <prop-encoded-array> |
| Definition: A grouping of integer tuple lists. Each tuple defines the |
| CPR ring oscillator (RO) scaling factor with units of QUOT/V |
| for each RO for a given fuse corner. Since CPR3 supports |
| exactly 16 ROs, each tuple must contain 16 elements |
| corresponding to RO0 through RO15 in order. If a given RO |
| is unused for a fuse corner, then its scaling factor may be |
| specified as 0. |
| |
| Each tuple list must contain the number of tuples defined in |
| the qcom,cpr-fuse-corners property. The tuples in a given |
| list are ordered from the lowest fuse corner to the highest |
| fuse corner. |
| |
| The tuple list grouping must contain qcom,cpr-fuse-combos |
| number of tuple lists in which case the lists are matched to |
| fuse combinations 1-to-1 or qcom,cpr-speed-bins number of |
| tuple lists in which case the lists are matched to |
| speed bins 1-to-1 or exactly 1 list which is used regardless |
| of the fuse combination and speed bin found on a given chip. |
| |
| The target quotient adjustment to apply for each RO of a |
| given corner is determined by multiplying the adjustment |
| value in qcom,cpr-closed-loop-voltage-fuse-adjustment or |
| qcom,cpr-closed-loop-voltage-adjustment by the relevant RO |
| scaling factor in this property. |
| |
| - qcom,allow-aging-voltage-adjustment |
| Usage: optional |
| Value type: <prop-encoded-array> |
| Definition: A list of integers which specifies if CPR aging adjustment |
| should be performed for each fuse combination. |
| Supported per-combo element values: |
| 0 - do not perform CPR aging adjustment |
| 1 - perform CPR aging adjustment |
| |
| The list must contain qcom,cpr-fuse-combos number of |
| elements in which case the elements are matched to fuse |
| combinations 1-to-1 or qcom,cpr-speed-bins number of |
| elements in which case the elements are matched to |
| speed bins 1-to-1 or exactly 1 element which is used |
| regardless of the fuse combination and speed bin found |
| on a given chip. |
| |
| - qcom,allow-aging-open-loop-voltage-adjustment |
| Usage: optional |
| Value type: <prop-encoded-array> |
| Definition: A list of integers which specifies if CPR aging adjustment |
| should be applied to open-loop voltages for each fuse |
| combination. Note that aging adjustment must be allowed via |
| qcom,allow-aging-voltage-adjustment in order for this |
| property to have an effect. |
| Supported per-combo element values: |
| 0 - do not perform CPR aging adjustment |
| 1 - perform CPR aging adjustment |
| |
| The list must meet the same size requirements as those |
| specified for qcom,allow-aging-voltage-adjustment above. |
| |
| - qcom,cpr-aging-max-voltage-adjustment |
| Usage: required if qcom,allow-aging-voltage-adjustment is specified |
| Value type: <prop-encoded-array> |
| Definition: A list of integers which defines the maximum CPR aging |
| voltage margin adjustment in microvolts that may be added |
| for each fuse combination. If this property is specified |
| and the adjustment specified is greater than 0, then aging |
| adjustments are required for this regulator. |
| |
| The list must meet the same size requirements as those |
| specified for qcom,allow-aging-voltage-adjustment above. |
| |
| - qcom,cpr-aging-ref-corner |
| Usage: required if qcom,allow-aging-voltage-adjustment is specified |
| Value type: <prop-encoded-array> |
| Definition: A list of integers which defines the CPR reference corner |
| for this regulator to use during aging measurements for each |
| fuse combination. |
| |
| The list must meet the same size requirements as those |
| specified for qcom,allow-aging-voltage-adjustment above. |
| |
| - qcom,cpr-aging-ro-scaling-factor |
| Usage: required if qcom,allow-aging-voltage-adjustment is specified |
| Value type: <prop-encoded-array> |
| Definition: A list of integers which defines the CPR aging ring |
| oscillator (RO) scaling factor with units of QUOT/V to use |
| during aging measurements for each fuse combination. |
| |
| The list must meet the same size requirements as those |
| specified for qcom,allow-aging-voltage-adjustment above. |
| |
| - qcom,cpr-aging-derate |
| Usage: optional, though only meaningful if |
| qcom,allow-aging-voltage-adjustment is specified |
| Value type: <prop-encoded-array> |
| Definition: A list of integer tuples which each define the CPR aging |
| derating scaling factor to apply to the closed-loop voltage |
| margin adjustment for each corner. The individual scaling |
| factors have units of uV/mV and are ordered from lowest to |
| highest corner per tuple. For example, a value of 900 |
| specifies that the voltage adjustment for the corner should |
| be 90% (900/1000) of that for the reference corner. |
| |
| The list and tuples must meet the same size requirements as |
| those specified for qcom,cpr-voltage-ceiling above. |
| |
| If this property is not specified, then it is assumed that |
| no corners require derating (i.e. the scaling factor would |
| be 1000). |
| |
| All properties specified within the core regulator framework can also be used in |
| third level nodes. These bindings can be found in: |
| Documentation/devicetree/bindings/regulator/regulator.txt. |
| |
| See platform specific cpr3-regulator binding documentation files for examples. |