ABX8XX_REG_IRQ
irq_mask = i2c_smbus_read_byte_data(client, ABX8XX_REG_IRQ);
err = i2c_smbus_write_byte_data(client, ABX8XX_REG_IRQ,
err = i2c_smbus_write_byte_data(client, ABX8XX_REG_IRQ,
err = i2c_smbus_write_byte_data(client, ABX8XX_REG_IRQ,