-typedef int (*ad714x_read_t)(struct device *, unsigned short, unsigned short *);
-typedef int (*ad714x_write_t)(struct device *, unsigned short, unsigned short);
+typedef int (*ad714x_read_t)(struct ad714x_chip *, unsigned short, unsigned short *, size_t);
+typedef int (*ad714x_write_t)(struct ad714x_chip *, unsigned short, unsigned short);
+
+struct ad714x_chip {
+ unsigned short l_state;
+ unsigned short h_state;
+ unsigned short c_state;
+ unsigned short adc_reg[STAGE_NUM];
+ unsigned short amb_reg[STAGE_NUM];
+ unsigned short sensor_val[STAGE_NUM];
+
+ struct ad714x_platform_data *hw;
+ struct ad714x_driver_data *sw;
+
+ int irq;
+ struct device *dev;
+ ad714x_read_t read;
+ ad714x_write_t write;
+
+ struct mutex mutex;
+
+ unsigned product;
+ unsigned version;
+
+ __be16 xfer_buf[16] ____cacheline_aligned;
+
+};