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esp-idf/components/soc/esp32/rtc_clk.c
Ivan Grokhotkov 7c584e80b0 soc/rtc_clk: fix loss of precision in estimation of XTAL frequency 
RTC_FAST_CLK_FREQ_APPROX is defined as 8500000, so 0.5MHz part was lost
when dividing by MHZ. Since cal_val is 64-bit the parens can be removed.

With 40MHz XTAL for a nominal ESP32 chip, this fixes estimated XTAL
frequency from 38 to 40MHz.
2018-01-08 23:31:21 +08:00

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