• Caesar Wang's avatar
    dt-bindings: rockchip-thermal: Add the pinctrl states in this document · 9aba783a
    Caesar Wang authored
    The "init" pinctrl is defined we'll set
    pinctrl to this state before probe and then "default" after probe.
    Add the "init" and "sleep" pinctrl as the OTP gpio state, since we need
    switch the pin to gpio state before the TSADC controller is reset.
    
    AFAIK, the TSADC controller is reset, the tshut polarity will be
    a *low* signal in a short period of time for some devices.
    
    Says:
    The TSADC get the temperature on rockchip thermal.
    
    If T(current temperature) < (setting temperature), the OTP output the
    *high* signal.
    If T(current temperature) > (setting temperature), the OTP output the
    *low* Signal.
    
    In some cases, the OTP pin is connected to the PMIC, maybe the
    PMIC can accept the reset response time to avoid this issue.
    
    In other words, the system will be always reboot if we make the
    OTP pin is connected the others IC to control the power.
    Acked-by: default avatarRob Herring <robh@kernel.org>
    Signed-off-by: default avatarCaesar Wang <wxt@rock-chips.com>
    Reviewed-by: default avatarDouglas Anderson <dianders@chromium.org>
    Signed-off-by: default avatarEduardo Valentin <edubezval@gmail.com>
    9aba783a
rockchip-thermal.txt 2.43 KB