AM335X_I2C_IRQSTATUS
stat = I2C_READ_REG(sc, AM335X_I2C_IRQSTATUS);
I2C_WRITE_REG(sc, AM335X_I2C_IRQSTATUS, stat);
I2C_WRITE_REG(sc, AM335X_I2C_IRQSTATUS,
I2C_READ_REG(sc, AM335X_I2C_IRQSTATUS));
I2C_WRITE_REG(sc, AM335X_I2C_IRQSTATUS, stat);