This patch support the protection of host device from over current.
The Charger-manager set proper current limit of charger(regulator) for
charging according to type of charger cable when external connector
is attached.
Signed-off-by: Chanwoo Choi <cw00.c...@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo....@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.p...@samsung.com>
---
drivers/power/charger-manager.c | 15 +++++++++++++++
include/linux/power/charger-manager.h | 8 ++++++++
2 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c
index af03f23..4f1de56 100644
--- a/drivers/power/charger-manager.c
+++ b/drivers/power/charger-manager.c
@@ -1001,6 +1001,21 @@ static void charger_extcon_work(struct work_struct *work)
{
struct charger_cable *cable =
container_of(work, struct charger_cable, wq);
+ int ret;
+
+ if (cable->attached && cable->min_uA != 0 && cable->max_uA != 0) {
+ ret = regulator_set_current_limit(cable->charger->consumer,
+ cable->min_uA, cable->max_uA);
+ if (ret < 0) {
+ pr_err("Cannot set current limit of %s (%s)\n",
+ cable->charger->regulator_name, cable->name);
+ return;
+ }
+
+ pr_info("Set current limit of %s : %duA ~ %duA\n",
+ cable->charger->regulator_name,
+ cable->min_uA, cable->max_uA);
+ }
try_charger_enable(cable->cm, cable->attached);
}
diff --git a/include/linux/power/charger-manager.h
b/include/linux/power/charger-manager.h
index 6cb9fbc..cd22029 100644
--- a/include/linux/power/charger-manager.h
+++ b/include/linux/power/charger-manager.h
@@ -94,6 +94,14 @@ struct charger_cable {
bool attached;
struct charger_regulator *charger;
+
+ /*
+ * Set min/max current of regulator to protect over-current issue
+ * according to a kind of charger cable when cable is attached.
+ */
+ int min_uA;
+ int max_uA;
+
struct charger_manager *cm;
};
--
1.7.0.4
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