/* SPDX-License-Identifier: GPL-2.0-or-later */ /* -------------------------------------------------------------------- */ /* i2c-pcf8584.h: PCF 8584 global defines */ /* -------------------------------------------------------------------- */ /* Copyright (C) 1996 Simon G. Vogl 1999 Hans Berglund */ /* -------------------------------------------------------------------- */ /* With some changes from Frodo Looijaard <frodol@dds.nl> */ #ifndef I2C_PCF8584_H #define I2C_PCF8584_H 1 /* ----- Control register bits ---------------------------------------- */ #define I2C_PCF_PIN 0x80 #define I2C_PCF_ESO 0x40 #define I2C_PCF_ES1 0x20 #define I2C_PCF_ES2 0x10 #define I2C_PCF_ENI 0x08 #define I2C_PCF_STA 0x04 #define I2C_PCF_STO 0x02 #define I2C_PCF_ACK 0x01 #define I2C_PCF_START (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK) #define I2C_PCF_STOP (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK) #define I2C_PCF_REPSTART ( I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK) #define I2C_PCF_IDLE (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_ACK) /* ----- Status register bits ----------------------------------------- */ /*#define I2C_PCF_PIN 0x80 as above*/ #define I2C_PCF_INI 0x40 /* 1 if not initialized */ #define I2C_PCF_STS 0x20 #define I2C_PCF_BER 0x10 #define I2C_PCF_AD0 0x08 #define I2C_PCF_LRB 0x08 #define I2C_PCF_AAS 0x04 #define I2C_PCF_LAB 0x02 #define I2C_PCF_BB 0x01 /* ----- Chip clock frequencies --------------------------------------- */ #define I2C_PCF_CLK3 0x00 #define I2C_PCF_CLK443 0x10 #define I2C_PCF_CLK6 0x14 #define I2C_PCF_CLK 0x18 #define I2C_PCF_CLK12 0x1c /* ----- transmission frequencies ------------------------------------- */ #define I2C_PCF_TRNS90 0x00 /* 90 kHz */ #define I2C_PCF_TRNS45 0x01 /* 45 kHz */ #define I2C_PCF_TRNS11 0x02 /* 11 kHz */ #define I2C_PCF_TRNS15 0x03 /* 1.5 kHz */ /* ----- Access to internal registers according to ES1,ES2 ------------ */ /* they are mapped to the data port ( a0 = 0 ) */ /* available when ESO == 0 : */ #define I2C_PCF_OWNADR 0 #define I2C_PCF_INTREG I2C_PCF_ES2 #define I2C_PCF_CLKREG I2C_PCF_ES1 #endif /* I2C_PCF8584_H */