[PATCH 0/3] power: supply: axp20x_usb_power: prepare for external power delivery negotiation
From: Aren Moynihan
Date: Sat Jan 20 2024 - 20:49:21 EST
Being able to set the input current limit will be necessary to implement
usb power delivery on the Pine64 PinePhone. The PinePhone has a separate
chip (anx7688) that handles usb power delivery (among other things), so
we will need a way to apply the current limit which that negotiates.
The first two patches were originally based on code Ondřej Jirman
wrote[1], but I have almost completely rewritten them.
While working on this, I also discovered that the axp803 pmic sets a
current limit of 3A on the usb port without any negotiation if it
doesn't detect a battery.
1: https://xff.cz/git/linux/commit/?h=axp-6.7&id=3dcd33dfd1ae58db159427365dcb6d0d2b12f06d
Aren Moynihan (3):
power: supply: axp20x_usb_power: add input current limit
power: supply: axp20x_usb_power: enable usb_type reporting
power: supply: axp20x_usb_power: set input current limit in probe
drivers/power/supply/axp20x_usb_power.c | 192 +++++++++++++++++++++++-
1 file changed, 190 insertions(+), 2 deletions(-)
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2.43.0