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1 | #ifndef _LINUX_I2C_ALGO_PCA_H |
2 | #define _LINUX_I2C_ALGO_PCA_H | |
3 | ||
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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 | ||
1da177e4 | 28 | struct i2c_algo_pca_data { |
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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; | |
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36 | }; |
37 | ||
1da177e4 | 38 | int i2c_pca_add_bus(struct i2c_adapter *); |
c01b0831 | 39 | int i2c_pca_add_numbered_bus(struct i2c_adapter *); |
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40 | |
41 | #endif /* _LINUX_I2C_ALGO_PCA_H */ |