• Yangtao Li's avatar
    dt-bindings: cpufreq: Document allwinner,sun50i-h6-operating-points · b880c183
    Yangtao Li authored
    Allwinner Process Voltage Scaling Tables defines the voltage and
    frequency value based on the speedbin blown in the efuse combination.
    The sunxi-cpufreq-nvmem driver reads the efuse value from the SoC to
    provide the OPP framework with required information.
    This is used to determine the voltage and frequency value for each
    OPP of operating-points-v2 table when it is parsed by the OPP framework.
    
    The "allwinner,sun50i-h6-operating-points" DT extends the
    "operating-points-v2"
    with following parameters:
    - nvmem-cells (NVMEM area containig the speedbin information)
    - opp-microvolt-<name>: voltage in micro Volts.
      At runtime, the platform can pick a <name> and matching
      opp-microvolt-<name> property.
                            HW:             <name>:
                            sun50i-h6      speed0 speed1 speed2
    Signed-off-by: default avatarYangtao Li <tiny.windzz@gmail.com>
    Acked-by: default avatarMaxime Ripard <maxime.ripard@bootlin.com>
    Reviewed-by: default avatarRob Herring <robh@kernel.org>
    Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
    b880c183
sun50i-nvmem-cpufreq.txt 5.19 KB