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| author | Hans de Goede <hdegoede@redhat.com> | 2017-08-30 12:48:12 +0300 |
|---|---|---|
| committer | Sebastian Reichel <sre@kernel.org> | 2017-08-30 19:02:02 +0300 |
| commit | 18f8e6f695ac6ea879f610702d9bb04a42d1793c (patch) | |
| tree | f02aed03b9d34220f9cad0762a82f0812b969fd3 /drivers | |
| parent | 66b6bef2c4e06f8c7a0030445766bf868110c5a1 (diff) | |
| download | linux-18f8e6f695ac6ea879f610702d9bb04a42d1793c.tar.xz | |
power: supply: bq24190_charger: Get input_current_limit from our supplier
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 adding
an external_power_changed callback and calling
power_supply_set_input_current_limit_from_supplier from this callback.
This callback will only get called if the bq24190 has a parent-supply.
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@redhat.com>
Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/power/supply/bq24190_charger.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c index e606a078b0dd..35ff406aca48 100644 --- a/drivers/power/supply/bq24190_charger.c +++ b/drivers/power/supply/bq24190_charger.c @@ -165,6 +165,7 @@ struct bq24190_dev_info { struct extcon_dev *extcon; struct notifier_block extcon_nb; struct delayed_work extcon_work; + struct delayed_work input_current_limit_work; char model_name[I2C_NAME_SIZE]; bool initialized; bool irq_event; @@ -1210,6 +1211,32 @@ static int bq24190_charger_property_is_writeable(struct power_supply *psy, return ret; } +static void bq24190_input_current_limit_work(struct work_struct *work) +{ + struct bq24190_dev_info *bdi = + container_of(work, struct bq24190_dev_info, + input_current_limit_work.work); + + power_supply_set_input_current_limit_from_supplier(bdi->charger); +} + +/* Sync the input-current-limit with our parent supply (if we have one) */ +static void bq24190_charger_external_power_changed(struct power_supply *psy) +{ + struct bq24190_dev_info *bdi = power_supply_get_drvdata(psy); + + /* + * The Power-Good detection may take up to 220ms, sometimes + * the external charger detection is quicker, and the bq24190 will + * reset to iinlim based on its own charger detection (which is not + * hooked up when using external charger detection) resulting in a + * too low default 500mA iinlim. Delay setting the input-current-limit + * for 300ms to avoid this. + */ + queue_delayed_work(system_wq, &bdi->input_current_limit_work, + msecs_to_jiffies(300)); +} + static enum power_supply_property bq24190_charger_properties[] = { POWER_SUPPLY_PROP_CHARGE_TYPE, POWER_SUPPLY_PROP_HEALTH, @@ -1240,6 +1267,7 @@ 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 */ @@ -1758,6 +1786,8 @@ static int bq24190_probe(struct i2c_client *client, mutex_init(&bdi->f_reg_lock); bdi->f_reg = 0; bdi->ss_reg = BQ24190_REG_SS_VBUS_STAT_MASK; /* impossible state */ + INIT_DELAYED_WORK(&bdi->input_current_limit_work, + bq24190_input_current_limit_work); i2c_set_clientdata(client, bdi); |