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490bf29767
On the ESP32S2, rtc_clk_cal(RTC_CAL_RTC_MUX) measures the frequency of the 90kHz RTC clock regardless of the selected slow clock frequency. Keep track which clock is selected and pass the argument to rtc_clk_cal accordingly. fix clock choices update rtc 32k xtal code for s2 missed api in rtc.h bootloader_clock: update for S2