plrtc_fdt.c revision 1.1 
1/* $NetBSD: plrtc_fdt.c,v 1.1 2017/06/08 21:01:06 jmcneill Exp $ */
2
3/*-
4 * Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca>
5 * All rights reserved.
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: plrtc_fdt.c,v 1.1 2017/06/08 21:01:06 jmcneill Exp $");
31
32#include <sys/param.h>
33#include <sys/bus.h>
34#include <sys/device.h>
35#include <sys/systm.h>
36#include <sys/kernel.h>
37
38#include <dev/fdt/fdtvar.h>
39
40#include <dev/ic/pl031var.h>
41
42static int	plrtc_fdt_match(device_t, cfdata_t, void *);
43static void	plrtc_fdt_attach(device_t, device_t, void *);
44
45static const char * const compatible[] = {
46	"arm,pl031",
47	NULL
48};
49
50CFATTACH_DECL_NEW(plrtc_fdt, sizeof(struct plrtc_softc),
51	plrtc_fdt_match, plrtc_fdt_attach, NULL, NULL);
52
53static int
54plrtc_fdt_match(device_t parent, cfdata_t cf, void *aux)
55{
56	struct fdt_attach_args * const faa = aux;
57
58	return of_compatible(faa->faa_phandle, compatible) >= 0;
59}
60
61static void
62plrtc_fdt_attach(device_t parent, device_t self, void *aux)
63{
64	struct plrtc_softc * const sc = device_private(self);
65	struct fdt_attach_args * const faa = aux;
66	const int phandle = faa->faa_phandle;
67	bus_addr_t addr;
68	bus_size_t size;
69
70	if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
71		aprint_error(": missing 'reg' property\n");
72		return;
73	}
74
75	sc->sc_dev = self;
76	sc->sc_bst = faa->faa_bst;
77	if (bus_space_map(faa->faa_bst, addr, size, 0, &sc->sc_bsh)) {
78		aprint_error(": couldn't map device\n");
79		return;
80	}
81
82	plrtc_attach(sc);
83
84	fdtbus_todr_attach(self, phandle, &sc->sc_todr);
85}
86