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>
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index c8d5e2b..60fcfba 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1051,6 +1051,14 @@
}
}
+ 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: