diff options
| author | Stephen Boyd <sboyd@codeaurora.org> | 2015-06-12 02:37:05 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-06-12 14:16:57 +0200 |
| commit | 57f66b78860968fc7eddc9ce25f8e57f7e5000bd (patch) | |
| tree | 5ee90fa99fdd1277706faa3bef39522d26ebc4bc /drivers/regulator | |
| parent | regulator: Add pull down support (diff) | |
| download | linux-57f66b78860968fc7eddc9ce25f8e57f7e5000bd.tar.xz linux-57f66b78860968fc7eddc9ce25f8e57f7e5000bd.zip | |
regulator: Add soft start support
Some regulators support a "soft start" feature where the voltage
ramps up slowly when the regulator is enabled. Add an op
(set_soft_start) and a DT property + constraint to support this.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/core.c | 8 | ||||
| -rw-r--r-- | drivers/regulator/of_regulator.c | 3 |
2 files changed, 11 insertions, 0 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 60fcfba52592..6dfb2d6c19ae 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1059,6 +1059,14 @@ static int set_machine_constraints(struct regulator_dev *rdev, } } + if (rdev->constraints->soft_start && ops->set_soft_start) { + ret = ops->set_soft_start(rdev); + if (ret < 0) { + rdev_err(rdev, "failed to set soft start\n"); + goto out; + } + } + print_constraints(rdev); return 0; out: diff --git a/drivers/regulator/of_regulator.c b/drivers/regulator/of_regulator.c index c3433db0acda..207da037cd2d 100644 --- a/drivers/regulator/of_regulator.c +++ b/drivers/regulator/of_regulator.c @@ -84,6 +84,9 @@ static void of_get_regulation_constraints(struct device_node *np, if (!ret) constraints->enable_time = pval; + constraints->soft_start = of_property_read_bool(np, + "regulator-soft-start"); + if (!of_property_read_u32(np, "regulator-initial-mode", &pval)) { if (desc && desc->of_map_mode) { ret = desc->of_map_mode(pval); |