MAX14526 MUIC is used by LG P880/P895 which are currently in the process of merging.
Unfortunately U-Boot has no extcon driver model so I used a MISC model for now.
MAX14526 is a powerful extcon device which has the ability to accurately determine plugged devices. In this implementation muic can be configured to represent 3 modes: CP-USB/UART and AP-USB. Unfortunately AP-UART was disabled on P880/P895. Additionally the driver configures some stuff required by the charger.
--- Changes from v1: - used log_* instead of printf - log messages made simpler ---
Svyatoslav Ryhel (1): misc: extcon: add MAX14526 MUIC support
drivers/misc/Kconfig | 2 + drivers/misc/Makefile | 1 + drivers/misc/extcon/Kconfig | 8 ++ drivers/misc/extcon/Makefile | 2 + drivers/misc/extcon/extcon-max14526.c | 151 ++++++++++++++++++++++++++ 5 files changed, 164 insertions(+) create mode 100644 drivers/misc/extcon/Kconfig create mode 100644 drivers/misc/extcon/Makefile create mode 100644 drivers/misc/extcon/extcon-max14526.c