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regulator: DT: Add settling time property for non-linear voltage change

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Some regulators (some PWM regulators) have the voltage transition
exponentially. On such cases, the settling time for voltage change
is treated as constant time.

Add DT property for providing the settling time for any level of
voltage change for non-linear voltage change.

signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by: Rob Herring <robh@kernel.org>

Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Laxman Dewangan 2017-04-04 18:59:49 +05:30 committed by Mark Brown
parent d00b74613f
commit cfd2cedb48
1 changed files with 3 additions and 0 deletions
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Documentation/devicetree/bindings/regulator/regulator.txt
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@ -21,6 +21,9 @@ Optional properties:
design requires. This property describes the total system ramp time
required due to the combination of internal ramping of the regulator itself,
and board design issues such as trace capacitance and load on the supply.
- regulator-settling-time-us: Settling time, in microseconds, for voltage
change if regulator have the constant time for any level voltage change.
This is useful when regulator have exponential voltage change.
- regulator-soft-start: Enable soft start so that voltage ramps slowly
- regulator-state-mem sub-root node for Suspend-to-RAM mode
: suspend to memory, the device goes to sleep, but all data stored in memory,