CG_CLKPIN_CNTL_2
if (REG_GET_FIELD(tmp, CG_CLKPIN_CNTL_2, MUX_TCLK_TO_XCLK))
orig = data = RREG32_SMC(CG_CLKPIN_CNTL_2);
WREG32_SMC(CG_CLKPIN_CNTL_2, data);
tmp = RREG32(CG_CLKPIN_CNTL_2);
orig = data = RREG32(CG_CLKPIN_CNTL_2);
WREG32(CG_CLKPIN_CNTL_2, data);