[PATCH v4 11/20] power: supply: bq25890: On the bq25892 set the IINLIM based on external charger detection

Hans de Goede
2021-12-06T09:35:20Z

The bq25892 does not have builtin charger-type detection like the bq25980,
there might be some external charger detection capability, which will be
modelled as a power_supply class-device supplying the bq25892.

Use the usb_type property value from the supplier psy-device to set the
input-current-limit (when available).

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/power/supply/bq25890_charger.c | 33 ++++++++++++++++++++++++++
1 file changed, 33 insertions(+)

diff --git a/drivers/power/supply/bq25890_charger.c b/drivers/power/supply/bq25890_charger.c
index 637cdd3b6b11..3de72f0fbf3e 100644
--- a/drivers/power/supply/bq25890_charger.c
+++ b/drivers/power/supply/bq25890_charger.c
@@ -594,6 +594,38 @@ static int bq25890_power_supply_get_property(struct power_supply *psy,
return 0;
}

+/* On the BQ25892 try to get charger-type info from our supplier */
+static void bq25890_charger_external_power_changed(struct power_supply *psy)
+{
+ struct bq25890_device *bq = power_supply_get_drvdata(psy);
+ union power_supply_propval val;
+ int input_current_limit, ret;
+
+ if (bq->chip_version != BQ25892)
+ return;
+
+ ret = power_supply_get_property_from_supplier(bq->charger,
+ POWER_SUPPLY_PROP_USB_TYPE,
+ &val);
+ if (ret)
+ return;
+
+ switch (val.intval) {
+ case POWER_SUPPLY_USB_TYPE_DCP:
+ input_current_limit = bq25890_find_idx(2000000, TBL_IINLIM);
+ break;
+ case POWER_SUPPLY_USB_TYPE_CDP:
+ case POWER_SUPPLY_USB_TYPE_ACA:
+ input_current_limit = bq25890_find_idx(1500000, TBL_IINLIM);
+ break;
+ case POWER_SUPPLY_USB_TYPE_SDP:
+ default:
+ input_current_limit = bq25890_find_idx(500000, TBL_IINLIM);
+ }
+
+ bq25890_field_write(bq, F_IINLIM, input_current_limit);
+}
+
static int bq25890_get_chip_state(struct bq25890_device *bq,
struct bq25890_state *state)
{
@@ -818,6 +850,7 @@ static const struct power_supply_desc bq25890_power_supply_desc = {
.properties = bq25890_power_supply_props,
.num_properties = ARRAY_SIZE(bq25890_power_supply_props),
.get_property = bq25890_power_supply_get_property,
+ .external_power_changed = bq25890_charger_external_power_changed,
};

static int bq25890_power_supply_init(struct bq25890_device *bq)
--
2.33.1