diff --git a/include/linux/i2c-algo-pca.h b/include/linux/i2c-algo-pca.h
index fce47c0..adcb3dc 100644
--- a/include/linux/i2c-algo-pca.h
+++ b/include/linux/i2c-algo-pca.h
@@ -1,14 +1,41 @@
 #ifndef _LINUX_I2C_ALGO_PCA_H
 #define _LINUX_I2C_ALGO_PCA_H
 
+/* Clock speeds for the bus */
+#define I2C_PCA_CON_330kHz	0x00
+#define I2C_PCA_CON_288kHz	0x01
+#define I2C_PCA_CON_217kHz	0x02
+#define I2C_PCA_CON_146kHz	0x03
+#define I2C_PCA_CON_88kHz	0x04
+#define I2C_PCA_CON_59kHz	0x05
+#define I2C_PCA_CON_44kHz	0x06
+#define I2C_PCA_CON_36kHz	0x07
+
+/* PCA9564 registers */
+#define I2C_PCA_STA		0x00 /* STATUS  Read Only  */
+#define I2C_PCA_TO		0x00 /* TIMEOUT Write Only */
+#define I2C_PCA_DAT		0x01 /* DATA    Read/Write */
+#define I2C_PCA_ADR		0x02 /* OWN ADR Read/Write */
+#define I2C_PCA_CON		0x03 /* CONTROL Read/Write */
+
+#define I2C_PCA_CON_AA		0x80 /* Assert Acknowledge */
+#define I2C_PCA_CON_ENSIO	0x40 /* Enable */
+#define I2C_PCA_CON_STA		0x20 /* Start */
+#define I2C_PCA_CON_STO		0x10 /* Stop */
+#define I2C_PCA_CON_SI		0x08 /* Serial Interrupt */
+#define I2C_PCA_CON_CR		0x07 /* Clock Rate (MASK) */
+
 struct i2c_algo_pca_data {
-	int  (*get_own)			(struct i2c_algo_pca_data *adap); /* Obtain own address */
-	int  (*get_clock)		(struct i2c_algo_pca_data *adap);
-	void (*write_byte)		(struct i2c_algo_pca_data *adap, int reg, int val);
-	int  (*read_byte)		(struct i2c_algo_pca_data *adap, int reg);
-	int  (*wait_for_interrupt)	(struct i2c_algo_pca_data *adap);
+	void 				*data;	/* private low level data */
+	void (*write_byte)		(void *data, int reg, int val);
+	int  (*read_byte)		(void *data, int reg);
+	int  (*wait_for_completion)	(void *data);
+	void (*reset_chip)		(void *data);
+	/* i2c_clock values are defined in linux/i2c-algo-pca.h */
+	unsigned int			i2c_clock;
 };
 
 int i2c_pca_add_bus(struct i2c_adapter *);
+int i2c_pca_add_numbered_bus(struct i2c_adapter *);
 
 #endif /* _LINUX_I2C_ALGO_PCA_H */