diff options
| author | Stephen Boyd <sboyd@codeaurora.org> | 2015-06-11 17:37:04 -0700 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-06-12 13:09:43 +0100 |
| commit | 23c779b9f9161d6568d3b2fca06e70ad182c480c (patch) | |
| tree | 314598f81db70f24dc8ead5f84c708cb8d5f00ef /drivers | |
| parent | 22a10bca280073f81e9e2d9fed6f90a3bcf00236 (diff) | |
| download | linux-23c779b9f9161d6568d3b2fca06e70ad182c480c.tar.bz2 | |
regulator: Add pull down support
Some regulators need to be configured to pull down a resistor
when the regulator is disabled. Add an op (set_pull_down) 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')
| -rw-r--r-- | drivers/regulator/core.c | 8 | ||||
| -rw-r--r-- | drivers/regulator/of_regulator.c | 2 |
2 files changed, 10 insertions, 0 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index c8d5e2b05fdf..60fcfba52592 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1051,6 +1051,14 @@ static int set_machine_constraints(struct regulator_dev *rdev, } } + if (rdev->constraints->pull_down && ops->set_pull_down) { + ret = ops->set_pull_down(rdev); + if (ret < 0) { + rdev_err(rdev, "failed to set pull down\n"); + goto out; + } + } + print_constraints(rdev); return 0; out: diff --git a/drivers/regulator/of_regulator.c b/drivers/regulator/of_regulator.c index 482a86f90839..c3433db0acda 100644 --- a/drivers/regulator/of_regulator.c +++ b/drivers/regulator/of_regulator.c @@ -67,6 +67,8 @@ static void of_get_regulation_constraints(struct device_node *np, if (!constraints->always_on) /* status change should be possible. */ constraints->valid_ops_mask |= REGULATOR_CHANGE_STATUS; + constraints->pull_down = of_property_read_bool(np, "regulator-pull-down"); + if (of_property_read_bool(np, "regulator-allow-bypass")) constraints->valid_ops_mask |= REGULATOR_CHANGE_BYPASS; |