1 /* 2 * Copyright (c) 2013-2019 François Tigeot <ftigeot@wolfpond.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef _LINUX_I2C_H_ 28 #define _LINUX_I2C_H_ 29 30 #include <linux/mod_devicetable.h> 31 #include <linux/device.h> /* for struct device */ 32 #include <linux/sched.h> /* for completion */ 33 #include <linux/mutex.h> 34 #include <uapi/linux/i2c.h> 35 36 #include <bus/iicbus/iic.h> 37 38 #define I2C_M_RD IIC_M_RD 39 #define I2C_M_NOSTART IIC_M_NOSTART 40 41 struct i2c_adapter { 42 const struct i2c_algorithm *algo; 43 void *algo_data; 44 45 int timeout; 46 int retries; 47 struct device dev; 48 void *private_data; 49 50 char name[48]; 51 }; 52 53 struct i2c_client { 54 unsigned short flags; 55 unsigned short addr; 56 char name[I2C_NAME_SIZE]; 57 struct i2c_adapter *adapter; 58 }; 59 60 extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, 61 int num); 62 63 struct i2c_algorithm { 64 int (*master_xfer)(struct i2c_adapter *adap, struct i2c_msg *msgs, 65 int num); 66 67 u32 (*functionality) (struct i2c_adapter *); 68 }; 69 70 extern int i2c_add_adapter(struct i2c_adapter *); 71 extern void i2c_del_adapter(struct i2c_adapter *); 72 73 static inline void 74 i2c_set_adapdata(struct i2c_adapter *dev, void *data) 75 { 76 dev->private_data = data; 77 } 78 79 static inline void * 80 i2c_get_adapdata(const struct i2c_adapter *dev) 81 { 82 return dev->private_data; 83 } 84 85 struct i2c_board_info { 86 char type[I2C_NAME_SIZE]; 87 unsigned short addr; 88 }; 89 90 struct i2c_client * 91 i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info); 92 93 #endif /* _LINUX_I2C_H_ */ 94