Add two clock helper defines and functions: - rcc_set_pll_source: select PLL entry clock source - rcc_set_pllxtpre: HSE divider for PLL input clock Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>
Add two clock helper defines and functions: - rcc_set_pll_source: select PLL entry clock source - rcc_set_pllxtpre: HSE divider for PLL input clock Signed-off-by: Sergey Matyukevich <geomatsi@gmail.com>