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regulator: Add settling time for non-linear voltage transition

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Some regulators (some PWM regulators) have the voltage transition
non-linear i.e. exponentially. On such cases, the settling time
for voltage transition can not be presented in the voltage-ramp-delay.

Add new property for non-linear voltage transition and handle this
in getting the voltage settling time.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Laxman Dewangan
2017-04-04 18:59:50 +05:30
committed by Mark Brown
parent cfd2cedb48
commit d6c1dc3f52
3 changed files with 9 additions and 0 deletions
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include/linux/regulator/machine.h
+3
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@@ -108,6 +108,8 @@ struct regulator_state {
* @initial_state: Suspend state to set by default.
* @initial_mode: Mode to set at startup.
* @ramp_delay: Time to settle down after voltage change (unit: uV/us)
* @settling_time: Time to settle down after voltage change when voltage
* change is non-linear (unit: microseconds).
* @active_discharge: Enable/disable active discharge. The enum
* regulator_active_discharge values are used for
* initialisation.
@@ -149,6 +151,7 @@ struct regulation_constraints {
unsigned int initial_mode;
unsigned int ramp_delay;
unsigned int settling_time;
unsigned int enable_time;
unsigned int active_discharge;