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authorMarek Szyprowski <m.szyprowski@samsung.com>2017-10-18 11:56:21 +0200
committerChanwoo Choi <cw00.choi@samsung.com>2017-10-24 02:48:40 +0200
commit7b9651103b64c8a55eb6cec4c2240584e968354c (patch)
treef2b0b65bba4fbcf6999a27b1554e6e632d95c0ec /drivers/extcon
parentextcon: max14577: Delete an unnecessary variable initialisation in max14577_m... (diff)
downloadlinux-7b9651103b64c8a55eb6cec4c2240584e968354c.tar.xz
linux-7b9651103b64c8a55eb6cec4c2240584e968354c.zip
extcon: max77843: Add OTG power control to the MUIC driver
Enabling power on VBUS micro-usb pin is required only when passive OTG cable is connected. Initially OTG VBUS power control was planned to be done in charger driver. However such information is not really available from the extcon notifications, so VBUS power control has to be done directly in MUIC driver, which has all information about the attached accessory. For example SmartDock is externally powered accessory, provides OTG (USB HOST) functionality and use VBUS pin for charging a device battery, so the VBUS charging pump should be disabled in such case. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Diffstat (limited to 'drivers/extcon')
-rw-r--r--drivers/extcon/extcon-max77843.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/extcon/extcon-max77843.c b/drivers/extcon/extcon-max77843.c
index 28f251ff0fa2..17d6bd76edb4 100644
--- a/drivers/extcon/extcon-max77843.c
+++ b/drivers/extcon/extcon-max77843.c
@@ -240,6 +240,21 @@ static int max77843_muic_set_path(struct max77843_muic_info *info,
return 0;
}
+static void max77843_charger_set_otg_vbus(struct max77843_muic_info *info,
+ bool on)
+{
+ struct max77693_dev *max77843 = info->max77843;
+ unsigned int cnfg00;
+
+ if (on)
+ cnfg00 = MAX77843_CHG_OTG_MASK | MAX77843_CHG_BOOST_MASK;
+ else
+ cnfg00 = MAX77843_CHG_ENABLE | MAX77843_CHG_BUCK_MASK;
+
+ regmap_update_bits(max77843->regmap_chg, MAX77843_CHG_REG_CHG_CNFG_00,
+ MAX77843_CHG_MODE_MASK, cnfg00);
+}
+
static int max77843_muic_get_cable_type(struct max77843_muic_info *info,
enum max77843_muic_cable_group group, bool *attached)
{
@@ -355,6 +370,7 @@ static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info)
return ret;
extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
+ max77843_charger_set_otg_vbus(info, attached);
break;
case MAX77843_MUIC_GND_MHL_VB:
case MAX77843_MUIC_GND_MHL: