PLL1
LPC1XX_CGU_CLK_PLL(PLL1, pll1_src_ids, pll1_ops),
PLL(PLL1, "pll1", ref12_parents, 0, RCC_PLL1CR, RCC_RCK12SELR),
PLL1,
#define PLL_MASK (PLL3 | PLL2 | PLL1 | PLL0)
pll = PLL2 | PLL1;
pll = PLL2 | PLL1 | PLL0;
pll = PLL3 | PLL2 | PLL1;
pll = PLL3 | PLL2 | PLL1 | PLL0;