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regulator: DT: Add properties for asymmetric settling times 

Some regulators have different settling times for voltage increases and
decreases. Add DT properties to define separate settling times for up-
and downward voltage changes.

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Acked-by: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Matthias Kaehlcke 2017-05-16 11:43:42 -07:00 committed by Mark Brown
parent 2ea659a9ef
commit 543853de35
1 changed files with 8 additions and 0 deletions
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8
Documentation/devicetree/bindings/regulator/regulator.txt
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@ -24,6 +24,14 @@ Optional properties:
- 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-settling-time-up-us: Settling time, in microseconds, for voltage
increase if the regulator needs a constant time to settle after voltage
increases of any level. This is useful for regulators with exponential
voltage changes.
- regulator-settling-time-down-us: Settling time, in microseconds, for voltage
decrease if the regulator needs a constant time to settle after voltage
decreases of any level. This is useful for regulators with exponential
voltage changes.
- 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,