sppctl_prep_moon_reg_and_offset
reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, (master == mux_m_gpio));
reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, 1);
reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, 1);
reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, val);
reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, 0);
reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, 1);
reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, val);
reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, val);
reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, 1);