/* * v4l2-i2c-drv.h - contains I2C handling code that's identical for * all V4L2 I2C drivers. Use this header if the * I2C driver is only used by drivers converted * to the bus-based I2C API. * * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* NOTE: the full version of this header is in the v4l-dvb repository * and allows v4l i2c drivers to be compiled on pre-2.6.26 kernels. * The version of this header as it appears in the kernel is a stripped * version (without all the backwards compatibility stuff) and so it * looks a bit odd. * * If you look at the full version then you will understand the reason * for introducing this header since you really don't want to have all * the tricky backwards compatibility code in each and every i2c driver. * * If the i2c driver will never be compiled for pre-2.6.26 kernels, then * DO NOT USE this header! Just write it as a regular i2c driver. */ #ifndef __V4L2_I2C_DRV_H__ #define __V4L2_I2C_DRV_H__ #include <media/v4l2-common.h> struct v4l2_i2c_driver_data { const char * const name; int (*command)(struct i2c_client *client, unsigned int cmd, void *arg); int (*probe)(struct i2c_client *client, const struct i2c_device_id *id); int (*remove)(struct i2c_client *client); int (*suspend)(struct i2c_client *client, pm_message_t state); int (*resume)(struct i2c_client *client); const struct i2c_device_id *id_table; }; static struct v4l2_i2c_driver_data v4l2_i2c_data; static struct i2c_driver v4l2_i2c_driver; /* Bus-based I2C implementation for kernels >= 2.6.26 */ static int __init v4l2_i2c_drv_init(void) { v4l2_i2c_driver.driver.name = v4l2_i2c_data.name; v4l2_i2c_driver.command = v4l2_i2c_data.command; v4l2_i2c_driver.probe = v4l2_i2c_data.probe; v4l2_i2c_driver.remove = v4l2_i2c_data.remove; v4l2_i2c_driver.suspend = v4l2_i2c_data.suspend; v4l2_i2c_driver.resume = v4l2_i2c_data.resume; v4l2_i2c_driver.id_table = v4l2_i2c_data.id_table; return i2c_add_driver(&v4l2_i2c_driver); } static void __exit v4l2_i2c_drv_cleanup(void) { i2c_del_driver(&v4l2_i2c_driver); } module_init(v4l2_i2c_drv_init); module_exit(v4l2_i2c_drv_cleanup); #endif /* __V4L2_I2C_DRV_H__ */