Fix: misconfig FPU in sys_clock_init #141
Merged
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When testing stm32f429i on qemu-gnueclipse, it bump out
"qemu-system-gnuarmeclipse: Attempt to set CP10/11 in SCB->CPACR, but FP is not supported yet."
Found in sys_clock_init only check STM32F4X, then enable FPU and floating point
state preservation.
Adding CONFIG_FPU to prevent misconfig of FPU.