On some devices the USB Type-C port power (USB PD 2.0) negotiation is
done by a separate port-controller IC, while the current limit is
controlled through another (charger) IC.
It has been decided to model this by modelling the external Type-C
power brick (adapter/charger) as a power-supply class device which
supplies the charger-IC, with its voltage-now and current-max representing
the negotiated voltage and max current draw.
This commit adds support for this to the bq24190_charger driver by calling
power_supply_set_input_current_limit_from_supplier helper if the
"input-current-limit-from-supplier" device-property is set.
Note this replaces the functionality to get the current-limit from an
extcon device, which will be removed in a follow-up commit.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
drivers/power/supply/bq24190_charger.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c
index d78e2c6dc127..1f6424f0772f 100644
--- a/drivers/power/supply/bq24190_charger.c
+++ b/drivers/power/supply/bq24190_charger.c
@@ -161,6 +161,7 @@ struct bq24190_dev_info {
char model_name[I2C_NAME_SIZE];
bool initialized;
bool irq_event;
+ bool input_current_limit_from_supplier;
struct mutex f_reg_lock;
u8 f_reg;
u8 ss_reg;
@@ -1137,6 +1138,14 @@ static int bq24190_charger_property_is_writeable(struct power_supply *psy,
return ret;
}
+static void bq24190_charger_external_power_changed(struct power_supply *psy)
+{
+ struct bq24190_dev_info *bdi = power_supply_get_drvdata(psy);
+
+ if (bdi->input_current_limit_from_supplier)
+ power_supply_set_input_current_limit_from_supplier(psy);
+}
+
static enum power_supply_property bq24190_charger_properties[] = {
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_HEALTH,
@@ -1165,6 +1174,7 @@ static const struct power_supply_desc bq24190_charger_desc = {
.get_property = bq24190_charger_get_property,
.set_property = bq24190_charger_set_property,
.property_is_writeable = bq24190_charger_property_is_writeable,
+ .external_power_changed = bq24190_charger_external_power_changed,
};
/* Battery power supply property routines */
@@ -1654,6 +1664,10 @@ static int bq24190_probe(struct i2c_client *client,
return -EINVAL;
}
+ bdi->input_current_limit_from_supplier =
+ device_property_read_bool(dev,
+ "input-current-limit-from-supplier");
+
/*
* Devicetree platforms should get extcon via phandle (not yet supported).
* On ACPI platforms, extcon clients may invoke us with:
--
2.13.3
