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      1 $NetBSD: i2c_calls,v 1.1 2025/09/21 17:54:16 thorpej Exp $
      2 
      3 /*-
      4  * Copyright (c) 2021 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * Device calls used by the I2C subsystem.
     34  */
     35 
     36 subsystem i2c;
     37 
     38 #include <dev/i2c/i2cvar.h>
     39 
     40 /*
     41  * i2c-enumerate-devices
     42  *
     43  * Enumerates the devices connected to the I2C bus, filling out
     44  * the i2c_attach_args and invoking the callback for each one.
     45  * The caller provides the storage for the i2c_attach_args.
     46  *
     47  * If the callback returns true, then enumeration continues.  If
     48  * the callback returns false, enumeration is stopped.
     49  *
     50  * Call returns 0 if successful, or an error code upon failure:
     51  *
     52  * ENOTSUP	The device handle implementation for the
     53  *		I2C bus does not support this device call.
     54  */
     55 i2c-enumerate-devices {
     56 	struct i2c_attach_args *ia;	/* IN */
     57 	bool (*callback)(device_t, struct i2c_enumerate_devices_args *);
     58 };
     59