RCC_APB1DIVR
DIV_TABLE(NO_ID, "pclk1", "ck_mcu", CLK_IGNORE_UNUSED, RCC_APB1DIVR, 0,
STM32_CKTIM("ck1_tim", "pclk1", 0, RCC_APB1DIVR, RCC_TIMG1PRER),