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authorChanwoo Choi <cw00.choi@samsung.com>2012-07-12 10:03:29 +0400
committerAnton Vorontsov <anton.vorontsov@linaro.org>2012-07-14 05:31:17 +0400
commit45cd4fb28b43756afcd752ed1e8b3b836c1b1a2a (patch)
tree2c4d2303c772f4a149be6c4b9b8a0a2dd04d0aa9 /drivers/power/charger-manager.c
parentbee737bccb03ebd27f2d52706e9aed2fa2c8dcc4 (diff)
downloadlinux-45cd4fb28b43756afcd752ed1e8b3b836c1b1a2a.tar.xz
charger-manager: Set current limit of regulator for over current protection
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.choi@samsung.com> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Diffstat (limited to 'drivers/power/charger-manager.c')
-rw-r--r--drivers/power/charger-manager.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c
index d1e99e7957d2..526e5c931294 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);
}