JH7110_MUX_MASK
idx = (reg & JH7110_MUX_MASK) >> JH7110_MUX_SHIFT;
if ((idx & (JH7110_MUX_MASK >> JH7110_MUX_SHIFT)) != idx)
reg = READ4(sc, sc_clk->offset) & ~JH7110_MUX_MASK;