include/linux/i2c-algo-pca.h

   1 #ifndef _LINUX_I2C_ALGO_PCA_H
   2 #define _LINUX_I2C_ALGO_PCA_H
   3
   4 /* Clock speeds for the bus */
   5 #define I2C_PCA_CON_330kHz      0x00
   6 #define I2C_PCA_CON_288kHz      0x01
   7 #define I2C_PCA_CON_217kHz      0x02
   8 #define I2C_PCA_CON_146kHz      0x03
   9 #define I2C_PCA_CON_88kHz       0x04
  10 #define I2C_PCA_CON_59kHz       0x05
  11 #define I2C_PCA_CON_44kHz       0x06
  12 #define I2C_PCA_CON_36kHz       0x07
  13
  14 /* PCA9564 registers */
  15 #define I2C_PCA_STA             0x00 /* STATUS  Read Only  */
  16 #define I2C_PCA_TO              0x00 /* TIMEOUT Write Only */
  17 #define I2C_PCA_DAT             0x01 /* DATA    Read/Write */
  18 #define I2C_PCA_ADR             0x02 /* OWN ADR Read/Write */
  19 #define I2C_PCA_CON             0x03 /* CONTROL Read/Write */
  20
  21 #define I2C_PCA_CON_AA          0x80 /* Assert Acknowledge */
  22 #define I2C_PCA_CON_ENSIO       0x40 /* Enable */
  23 #define I2C_PCA_CON_STA         0x20 /* Start */
  24 #define I2C_PCA_CON_STO         0x10 /* Stop */
  25 #define I2C_PCA_CON_SI          0x08 /* Serial Interrupt */
  26 #define I2C_PCA_CON_CR          0x07 /* Clock Rate (MASK) */
  27
  28 struct i2c_algo_pca_data {
  29         void                            *data;  /* private low level data */
  30         void (*write_byte)              (void *data, int reg, int val);
  31         int  (*read_byte)               (void *data, int reg);
  32         int  (*wait_for_completion)     (void *data);
  33         void (*reset_chip)              (void *data);
  34         /* i2c_clock values are defined in linux/i2c-algo-pca.h */
  35         unsigned int                    i2c_clock;
  36 };
  37
  38 int i2c_pca_add_bus(struct i2c_adapter *);
  39 int i2c_pca_add_numbered_bus(struct i2c_adapter *);
  40
  41 #endif /* _LINUX_I2C_ALGO_PCA_H */