DPLL_RESET
REG_WRITE(DPLL_CTRL, dpll | (DPLL_PWRDN | DPLL_RESET));
dpll &= ~(DPLL_PWRDN | DPLL_RESET);
REG_WRITE(DPLL_CTRL, temp | (DPLL_PWRDN | DPLL_RESET));
REG_WRITE(DPLL_CTRL, temp & ~(DPLL_PWRDN | DPLL_RESET));