LL_PLL_ConfigSystemClock_HSI() function

An ErrorStatus enumeration value: - SUCCESS: Max frequency configuration done - ERROR: Max frequency configuration not done

The application need to ensure that PLL is disabled. Function is based on the following formula: - PLL output frequency = (((HSI frequency / PLLM) * PLLN) / PLLP) - PLLM: ensure that the VCO input frequency ranges from RCC_PLLVCO_INPUT_MIN to RCC_PLLVCO_INPUT_MAX (PLLVCO_input = HSI frequency / PLLM) - PLLN: ensure that the VCO output frequency is between RCC_PLLVCO_OUTPUT_MIN and RCC_PLLVCO_OUTPUT_MAX (PLLVCO_output = PLLVCO_input * PLLN) - PLLP: ensure that max frequency at 180000000 Hz is reach (PLLVCO_output / PLLP)