stm32g4: rcc: Add support for 24MHz external clocks #1490
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No functional change. Signed-off-by: Benedikt Spranger <b.spranger@linutronix.de>
The ST Nucleo 64 boards NUCLEO-G431RB, NUCLEO-G474RE and NUCLEO-G491RE are equipped with a 24 MHz crystal. Add RCC clock support for these boards. Signed-off-by: Benedikt Spranger <b.spranger@linutronix.de>
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ST decided to use 24 MHz crystals on the Nucleo 64 boards NUCLEO-G431RB, NUCLEO-G474RE and NUCLEO-G491RE.
Unfortunately there is no support for 24 MHz clocks in libopencm3.
Add support for 24 MHz clocks to ease development on these Nucleo-64 boards.