From 3a003baeec246f604ed1d2e0087560d7f15edcc6 Mon Sep 17 00:00:00 2001 From: Stephen Boyd Date: Fri, 17 Jul 2015 14:41:54 -0700 Subject: regulator: Add over current protection (OCP) support 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. Signed-off-by: Stephen Boyd Signed-off-by: Mark Brown --- drivers/regulator/core.c | 9 +++++++++ drivers/regulator/of_regulator.c | 3 +++ 2 files changed, 12 insertions(+) (limited to 'drivers/regulator') diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index c9f72019bd68..520413e2bca0 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -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: diff --git a/drivers/regulator/of_regulator.c b/drivers/regulator/of_regulator.c index b1c485b24ab2..250700c853bf 100644 --- a/drivers/regulator/of_regulator.c +++ b/drivers/regulator/of_regulator.c @@ -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: -- cgit v1.2.3