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| author | Yadwinder Singh Brar <yadi.brar01@gmail.com> | 2012-06-11 16:11:08 +0400 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-06-18 00:08:52 +0400 |
| commit | 6f0b2c696ca340cc2da381fe693fda3f8fdb2149 (patch) | |
| tree | 71814a0078daec92d97fd3a5651d083cfb424132 /drivers/regulator/of_regulator.c | |
| parent | b5fb77e0188dc85630b395eb0faddc4987be6ddb (diff) | |
| download | linux-6f0b2c696ca340cc2da381fe693fda3f8fdb2149.tar.xz | |
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 'drivers/regulator/of_regulator.c')
| -rw-r--r-- | drivers/regulator/of_regulator.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/regulator/of_regulator.c b/drivers/regulator/of_regulator.c index 56593b75168a..e2a731079066 100644 --- a/drivers/regulator/of_regulator.c +++ b/drivers/regulator/of_regulator.c @@ -20,7 +20,7 @@ static void of_get_regulation_constraints(struct device_node *np, struct regulator_init_data **init_data) { const __be32 *min_uV, *max_uV, *uV_offset; - const __be32 *min_uA, *max_uA; + const __be32 *min_uA, *max_uA, *ramp_delay; struct regulation_constraints *constraints = &(*init_data)->constraints; constraints->name = of_get_property(np, "regulator-name", NULL); @@ -60,6 +60,10 @@ static void of_get_regulation_constraints(struct device_node *np, constraints->always_on = true; else /* status change should be possible if not always on. */ constraints->valid_ops_mask |= REGULATOR_CHANGE_STATUS; + + ramp_delay = of_get_property(np, "regulator-ramp-delay", NULL); + if (ramp_delay) + constraints->min_uV = be32_to_cpu(*ramp_delay); } /** |