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i2c-algo-pca.h
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_I2C_ALGO_PCA_H #define _LINUX_I2C_ALGO_PCA_H /* 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 #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 */ /* 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 */ #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 pca_i2c_bus_settings - The configured PCA i2c bus settings * @mode: Configured i2c bus mode * @tlow: Configured SCL LOW period * @thi: Configured SCL HIGH period * @clock_freq: The configured clock frequency */ struct pca_i2c_bus_settings { int mode; int tlow; int thi; int clock_freq; }; struct i2c_algo_pca_data { 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); /* 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; unsigned int chip; struct pca_i2c_bus_settings bus_settings; }; int i2c_pca_add_bus(struct i2c_adapter *); int i2c_pca_add_numbered_bus(struct i2c_adapter *); #endif /* _LINUX_I2C_ALGO_PCA_H */
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