• Vicente Bergas's avatar
    arm64: dts: rockchip: add fan on rk3399-sapphire board · 6d252078
    Vicente Bergas authored
    The Sapphire board has a 12V fan. So, adding it to the DTS.
    There is no power supply directly connected, it needs the baseboard to
    work.
    If the board is used standalone then a hardware modification is needed.
    On the Sapphire board there is an unpopulated resistor to connect it to
    VBUS_TYPEC, which is usually 5V (too low) and can range up to 20V
    (too high).
    I tested it for a week connected to VCC_SYS which is 8.4V and proved to
    be more than enough for the required cooling needs. This is the
    connection described in the comment.
    Signed-off-by: default avatarVicente Bergas <vicencb@gmail.com>
    Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
    6d252078
rk3399-sapphire.dtsi 13.6 KB