rkgrf.c revision 1.1 
1/*	$OpenBSD: rkgrf.c,v 1.1 2017/04/30 14:00:06 kettenis Exp $	*/
2/*
3 * Copyright (c) 2017 Mark Kettenis <kettenis@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18#include <sys/param.h>
19#include <sys/systm.h>
20#include <sys/device.h>
21
22#include <machine/intr.h>
23#include <machine/bus.h>
24#include <machine/fdt.h>
25
26#include <dev/ofw/openfirm.h>
27#include <dev/ofw/ofw_misc.h>
28#include <dev/ofw/fdt.h>
29
30struct rkgrf_softc {
31	struct device		sc_dev;
32	bus_space_tag_t		sc_iot;
33	bus_space_handle_t	sc_ioh;
34};
35
36int rkgrf_match(struct device *, void *, void *);
37void rkgrf_attach(struct device *, struct device *, void *);
38
39struct cfattach	rkgrf_ca = {
40	sizeof (struct rkgrf_softc), rkgrf_match, rkgrf_attach
41};
42
43struct cfdriver rkgrf_cd = {
44	NULL, "rkgrf", DV_DULL
45};
46
47int
48rkgrf_match(struct device *parent, void *match, void *aux)
49{
50	struct fdt_attach_args *faa = aux;
51
52	return (OF_is_compatible(faa->fa_node, "rockchip,rk3399-grf") ||
53	    OF_is_compatible(faa->fa_node, "rockchip,rk3399-pmugrf"));
54}
55
56void
57rkgrf_attach(struct device *parent, struct device *self, void *aux)
58{
59	struct rkgrf_softc *sc = (struct rkgrf_softc *)self;
60	struct fdt_attach_args *faa = aux;
61
62	if (faa->fa_nreg < 1) {
63		printf(": no registers\n");
64		return;
65	}
66
67	sc->sc_iot = faa->fa_iot;
68
69	if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
70	    faa->fa_reg[0].size, 0, &sc->sc_ioh)) {
71		printf(": can't map registers\n");
72		return;
73	}
74
75	printf("\n");
76
77	regmap_register(faa->fa_node, sc->sc_iot, sc->sc_ioh,
78	    faa->fa_reg[0].size);
79}
80