Mach64_SetPLLReg
Mach64_SetPLLReg(PLL_VCLK_CNTL, vclkCntl | PLL_VCLK_RESET);
Mach64_SetPLLReg(PLL_VCLK_POST_DIV,
Mach64_SetPLLReg(PLL_VCLK0_FB_DIV + clkNum, fbDiv);
Mach64_SetPLLReg(PLL_XCLK_CNTL, tmp | (0x10 << clkNum));
Mach64_SetPLLReg(PLL_XCLK_CNTL, tmp & ~(0x10 << clkNum));
Mach64_SetPLLReg(PLL_VCLK_CNTL, vclkCntl & ~PLL_VCLK_RESET);