xref: /netbsd-src/sys/arch/arm/imx/imx51_i2c.c (revision 66fba52e4619ef9a369226cff8c03152b1a40a11)
1 /*	$NetBSD: imx51_i2c.c,v 1.3 2022/07/22 23:43:23 thorpej Exp $	*/
2 
3 /*
4  * Copyright (c) 2012, 2015 Genetec Corporation.  All rights reserved.
5  * Written by Hashimoto Kenichi for Genetec Corporation.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: imx51_i2c.c,v 1.3 2022/07/22 23:43:23 thorpej Exp $");
31 
32 #include "opt_imx.h"
33 
34 #include <sys/param.h>
35 #include <sys/bus.h>
36 #include <sys/device.h>
37 
38 #include <arm/imx/imx51reg.h>
39 #include <arm/imx/imx51var.h>
40 #include <arm/imx/imx51_ccmvar.h>
41 #include <arm/imx/imxi2cvar.h>
42 
43 int
imxi2c_match(device_t parent,cfdata_t cf,void * aux)44 imxi2c_match(device_t parent, cfdata_t cf, void *aux)
45 {
46 	struct axi_attach_args *aa = aux;
47 
48 	switch (aa->aa_addr) {
49 	case I2C1_BASE:
50 	case I2C2_BASE:
51 #ifdef IMX50
52 	case I2C3_BASE:
53 #endif
54 		return 1;
55 	}
56 
57 	return 0;
58 }
59 
60 void
imxi2c_attach(device_t parent,device_t self,void * aux)61 imxi2c_attach(device_t parent, device_t self, void *aux)
62 {
63 	struct axi_attach_args * aa = aux;
64 
65 	if (aa->aa_size <= 0)
66 		aa->aa_size = I2C_SIZE;
67 
68 	imxi2c_attach_common(self,
69 	    aa->aa_iot, aa->aa_addr, aa->aa_size,
70 	    imx51_get_clock(IMX51CLK_PERCLK_ROOT), 400000);
71 }
72