power: supply: bq24190_charger: Get input_current_limit from our supplier

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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>

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This commit is contained in:

Hans de Goede 2017-08-30 11:48:12 +02:00 • committed by Sebastian Reichel

parent 66b6bef2c4

commit 18f8e6f695

1 changed files with 30 additions and 0 deletions

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drivers/power/supply/bq24190_charger.c

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