PCIE_GLI_9767_SD_PLL_CTL2_PLLSSC_PPM
ssc &= ~PCIE_GLI_9767_SD_PLL_CTL2_PLLSSC_PPM;
ssc |= FIELD_PREP(PCIE_GLI_9767_SD_PLL_CTL2_PLLSSC_PPM, ppm);