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i2c-algo-pca: Add PCA9665 support

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Add support for the PCA9665 I2C controller.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Marco Aurelio da Costa
2009-03-28 21:34:44 +01:00
committed by Jean Delvare
parent bac3e7c2aa
commit eff9ec95ef
5 changed files with 216 additions and 28 deletions
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33
include/linux/i2c-algo-pca.h
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@@ -1,7 +1,14 @@
#ifndef _LINUX_I2C_ALGO_PCA_H
#define _LINUX_I2C_ALGO_PCA_H
/* Clock speeds for the bus */
/* Chips known to the pca algo */
#define I2C_PCA_CHIP_9564 0x00
#define I2C_PCA_CHIP_9665 0x01
/* Internal period for PCA9665 oscilator */
#define I2C_PCA_OSC_PER 3 /* e10-8s */
/* Clock speeds for the bus for PCA9564*/
#define I2C_PCA_CON_330kHz 0x00
#define I2C_PCA_CON_288kHz 0x01
#define I2C_PCA_CON_217kHz 0x02
@@ -18,6 +25,26 @@
#define I2C_PCA_ADR 0x02 /* OWN ADR Read/Write */
#define I2C_PCA_CON 0x03 /* CONTROL Read/Write */
/* PCA9665 registers */
#define I2C_PCA_INDPTR 0x00 /* INDIRECT Pointer Write Only */
#define I2C_PCA_IND 0x02 /* INDIRECT Read/Write */
/* PCA9665 indirect registers */
#define I2C_PCA_ICOUNT 0x00 /* Byte Count for buffered mode */
#define I2C_PCA_IADR 0x01 /* OWN ADR */
#define I2C_PCA_ISCLL 0x02 /* SCL LOW period */
#define I2C_PCA_ISCLH 0x03 /* SCL HIGH period */
#define I2C_PCA_ITO 0x04 /* TIMEOUT */
#define I2C_PCA_IPRESET 0x05 /* Parallel bus reset */
#define I2C_PCA_IMODE 0x06 /* I2C Bus mode */
/* PCA9665 I2C bus mode */
#define I2C_PCA_MODE_STD 0x00 /* Standard mode */
#define I2C_PCA_MODE_FAST 0x01 /* Fast mode */
#define I2C_PCA_MODE_FASTP 0x02 /* Fast Plus mode */
#define I2C_PCA_MODE_TURBO 0x03 /* Turbo mode */
#define I2C_PCA_CON_AA 0x80 /* Assert Acknowledge */
#define I2C_PCA_CON_ENSIO 0x40 /* Enable */
#define I2C_PCA_CON_STA 0x20 /* Start */
@@ -31,7 +58,9 @@ struct i2c_algo_pca_data {
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 */
/* For PCA9564, use one of the predefined frequencies:
* 330000, 288000, 217000, 146000, 88000, 59000, 44000, 36000
* For PCA9665, use the frequency you want here. */
unsigned int i2c_clock;
};