WMREG_FEXTNVM6
reg = CSR_READ(sc, WMREG_FEXTNVM6);
CSR_WRITE(sc, WMREG_FEXTNVM6, reg);
CSR_WRITE(sc, WMREG_FEXTNVM6,
CSR_READ(sc, WMREG_FEXTNVM6)
uint32_t fextnvm6 = CSR_READ(sc, WMREG_FEXTNVM6);
CSR_WRITE(sc, WMREG_FEXTNVM6, fextnvm6 | FEXTNVM6_REQ_PLL_CLK);
CSR_WRITE(sc, WMREG_FEXTNVM6, fextnvm6);