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 */ 42