RK_I2C_IPD_NAKRCVIPD
RK_I2C_IPD_STARTIPD | RK_I2C_IPD_STOPIPD | RK_I2C_IPD_NAKRCVIPD)
if (sc->ipd & RK_I2C_IPD_NAKRCVIPD) {
sc->ipd &= ~RK_I2C_IPD_NAKRCVIPD;