@@ -42,6 +42,7 @@ Optional properties:
- regulator-system-load: Load in uA present on regulator that is not captured by
any consumer request.
- regulator-pull-down: Enable pull down resistor when the regulator is disabled.
+- regulator-over-current-protection: Enable over current protection.
Deprecated properties:
- regulator-compatible: If a regulator chip contains multiple
@@ -1081,6 +1081,15 @@ static int set_machine_constraints(struct regulator_dev *rdev,
}
}
+ if (rdev->constraints->over_current_protection
+ && ops->set_over_current_protection) {
+ ret = ops->set_over_current_protection(rdev);
+ if (ret < 0) {
+ rdev_err(rdev, "failed to set over current protection\n");
+ goto out;
+ }
+ }
+
print_constraints(rdev);
return 0;
out:
@@ -107,6 +107,9 @@ static void of_get_regulation_constraints(struct device_node *np,
if (!of_property_read_u32(np, "regulator-system-load", &pval))
constraints->system_load = pval;
+ constraints->over_current_protection = of_property_read_bool(np,
+ "regulator-over-current-protection");
+
for (i = 0; i < ARRAY_SIZE(regulator_states); i++) {
switch (i) {
case PM_SUSPEND_MEM:
@@ -148,6 +148,7 @@ struct regulator_ops {
int (*get_current_limit) (struct regulator_dev *);
int (*set_input_current_limit) (struct regulator_dev *, int lim_uA);
+ int (*set_over_current_protection) (struct regulator_dev *);
/* enable/disable regulator */
int (*enable) (struct regulator_dev *);
@@ -147,6 +147,7 @@ struct regulation_constraints {
unsigned ramp_disable:1; /* disable ramp delay */
unsigned soft_start:1; /* ramp voltage slowly */
unsigned pull_down:1; /* pull down resistor when regulator off */
+ unsigned over_current_protection:1; /* auto disable on over current */
};
/**
Some regulators can automatically shut down when they detect an over current event. Add an op (set_over_current_protection) and a DT property + constraint to support this capability. Cc: Rob Herring <robherring2@gmail.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> --- Changes since v3: * New patch Documentation/devicetree/bindings/regulator/regulator.txt | 1 + drivers/regulator/core.c | 9 +++++++++ drivers/regulator/of_regulator.c | 3 +++ include/linux/regulator/driver.h | 1 + include/linux/regulator/machine.h | 1 + 5 files changed, 15 insertions(+)