RK_I2C_IPD
sc->ipd = RK_I2C_READ(sc, RK_I2C_IPD);
RK_I2C_WRITE(sc, RK_I2C_IPD, sc->ipd);
RK_I2C_WRITE(sc, RK_I2C_IPD, RK_I2C_IPD_ALL);