• Marek Szyprowski's avatar
    extcon: max14577: Avoid forcing UART path on drive probe · 5a196c29
    Marek Szyprowski authored
    Driver unconditionally forces UART path during probe, probably to ensure
    that one can get kernel serial log as soon as possible.
    This approach causes some issues, especially when board is booted with
    non-UART cable connected to micro-USB port. For example, when USB cable is
    connected, UART TX/RX lines are unconditionally short-circuited to USB
    D+/D- lines. This is in turn recognized by a series of serial BREAK
    signals and some random characters when USB host tries to perform
    enumeration procedure.
    To solve the above issue and keep UART console operational as early as
    possible, set UART path only when USB ID reports UART capable cable.
    Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
    Signed-off-by: default avatarChanwoo Choi <cw00.choi@samsung.com>
extcon-max14577.c 21.3 KB