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regulator: core: add support for configuring turn-on time through constraints

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The turn-on time of the regulator depends on the regulator device's
electrical characteristics. Sometimes regulator turn-on time also
depends on the capacitive load on the given platform and it can be
more than the datasheet value.

The driver provides the enable-time as per datasheet.

Add support for configure the enable ramp time through regulator
constraints so that regulator core can take this value for enable
time for that regulator.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Laxman Dewangan 2013-09-18 18:18:02 +05:30 • committed by Mark Brown
commit 00c877c69b
4 changed files with 15 additions and 0 deletions
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2
include/linux/regulator/machine.h
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@ -95,6 +95,7 @@ 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)
* @enable_time: Turn-on time of the rails (unit: microseconds)
*/
struct regulation_constraints {
@ -129,6 +130,7 @@ struct regulation_constraints {
unsigned int initial_mode;
unsigned int ramp_delay;
unsigned int enable_time;
/* constraint flags */
unsigned always_on:1; /* regulator never off when system is on */