diff options
| author | Yadwinder Singh Brar <yadi.brar01@gmail.com> | 2012-06-11 17:41:08 +0530 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-06-17 21:08:52 +0100 |
| commit | 6f0b2c696ca340cc2da381fe693fda3f8fdb2149 (patch) | |
| tree | 71814a0078daec92d97fd3a5651d083cfb424132 /include/linux/regulator/driver.h | |
| parent | b5fb77e0188dc85630b395eb0faddc4987be6ddb (diff) | |
regulator: Add ramp_delay configuration to constraints
For some hardwares ramp_delay for BUCKs is a configurable parameter which can
be configured through DT or board file.This patch adds ramp_delay to regulator
constraints and allow user to configure it for regulators which supports this
feature, through DT or board file. It will provide two ways of setting the
ramp_delay for a regulator:
First, by setting it as constraints in board file(for configurable
regulators) and set_machine_constraints() will take care of setting it on
hardware by calling(the provided) .set_ramp_delay() operation(callback).
Second, by setting it as data in regulator_desc(as fixed/default
ramp_delay rate) for a regulator in driver.
regulator_set_voltage_time_sel() will give preference to
constraints->ramp_delay while reading ramp_delay rate for regulator. Similarly
users should also take care accordingly while refering ramp_delay rate(in case
of implementing their private .set_voltage_time_sel() callbacks for different
regulators).
[Rewrote subject for 80 columns -- broonie]
Signed-off-by: Yadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'include/linux/regulator/driver.h')
| -rw-r--r-- | include/linux/regulator/driver.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h index ae5c2537923..ddc155d262d 100644 --- a/include/linux/regulator/driver.h +++ b/include/linux/regulator/driver.h @@ -67,6 +67,8 @@ enum regulator_status { * * @enable_time: Time taken for the regulator voltage output voltage to * stabilise after being enabled, in microseconds. + * @set_ramp_delay: Set the ramp delay for the regulator. The driver should + * select ramp delay equal to or less than(closest) ramp_delay. * @set_voltage_time_sel: Time taken for the regulator voltage output voltage * to stabilise after being set to a new value, in microseconds. * The function provides the from and to voltage selector, the @@ -113,6 +115,7 @@ struct regulator_ops { /* Time taken to enable or set voltage on the regulator */ int (*enable_time) (struct regulator_dev *); + int (*set_ramp_delay) (struct regulator_dev *, int ramp_delay); int (*set_voltage_time_sel) (struct regulator_dev *, unsigned int old_selector, unsigned int new_selector); |