1/*	$NetBSD: imx_i2c.c,v 1.3 2022/07/22 23:43:24 thorpej Exp $	*/
2
3/*-
4 * Copyright (c) 2019 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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * 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: imx_i2c.c,v 1.3 2022/07/22 23:43:24 thorpej Exp $");
31
32#include <sys/bus.h>
33
34#include <arm/imx/imxi2cvar.h>
35
36#include <dev/fdt/fdtvar.h>
37
38static const struct device_compatible_entry compat_data[] = {
39	{ .compat = "fsl,imx21-i2c" },
40	DEVICE_COMPAT_EOL
41};
42
43int
44imxi2c_match(device_t parent, cfdata_t cf, void *aux)
45{
46	struct fdt_attach_args * const faa = aux;
47
48	return of_compatible_match(faa->faa_phandle, compat_data);
49}
50
51void
52imxi2c_attach(device_t parent __unused, device_t self, void *aux)
53{
54	struct imxi2c_softc *imxsc = device_private(self);
55	struct fdt_attach_args * const faa = aux;
56	const int phandle = faa->faa_phandle;
57	bus_space_tag_t bst = faa->faa_bst;
58	bus_addr_t addr;
59	bus_size_t size;
60	int error;
61
62	if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
63		aprint_error(": couldn't get registers\n");
64		return;
65	}
66
67	imxsc->sc_clk = fdtbus_clock_get_index(phandle, 0);
68	if (imxsc->sc_clk == NULL) {
69		aprint_error(": couldn't get clock\n");
70		return;
71	}
72
73	error = clk_enable(imxsc->sc_clk);
74	if (error) {
75		aprint_error_dev(self, "couldn't enable: %d\n", error);
76		return;
77	}
78
79	u_int freq;
80	error = of_getprop_uint32(phandle, "clock-frequency", &freq);
81	if (error)
82		freq = 100000;
83
84	imxsc->sc_motoi2c.sc_phandle = phandle;
85	imxi2c_attach_common(self, bst, addr, size,
86	    clk_get_rate(imxsc->sc_clk), freq);
87}
88