gtmr_fdt.c revision 1.3 
1/* $NetBSD: gtmr_fdt.c,v 1.3 2017/05/30 22:00:25 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: gtmr_fdt.c,v 1.3 2017/05/30 22:00:25 jmcneill Exp $");
31
32#include <sys/param.h>
33#include <sys/bus.h>
34#include <sys/device.h>
35#include <sys/intr.h>
36#include <sys/systm.h>
37#include <sys/kernel.h>
38#include <sys/kmem.h>
39
40#include <arm/cortex/gtmr_intr.h>
41#include <arm/cortex/mpcore_var.h>
42#include <arm/cortex/gtmr_var.h>
43
44#include <dev/fdt/fdtvar.h>
45#include <arm/fdt/arm_fdtvar.h>
46
47static int	gtmr_fdt_match(device_t, cfdata_t, void *);
48static void	gtmr_fdt_attach(device_t, device_t, void *);
49
50static void	gtmr_fdt_cpu_hatch(void *, struct cpu_info *);
51
52CFATTACH_DECL_NEW(gtmr_fdt, 0, gtmr_fdt_match, gtmr_fdt_attach, NULL, NULL);
53
54static int
55gtmr_fdt_match(device_t parent, cfdata_t cf, void *aux)
56{
57	const char * const compatible[] = {
58		"arm,armv7-timer",
59		NULL
60	};
61	struct fdt_attach_args * const faa = aux;
62
63	return of_compatible(faa->faa_phandle, compatible) >= 0;
64}
65
66static void
67gtmr_fdt_attach(device_t parent, device_t self, void *aux)
68{
69	aprint_naive("\n");
70	aprint_normal(": Generic Timer\n");
71
72	struct mpcore_attach_args mpcaa = {
73		.mpcaa_name = "armgtmr",
74		.mpcaa_irq = IRQ_GTMR_PPI_VTIMER
75	};
76
77	config_found(self, &mpcaa, NULL);
78
79	arm_fdt_cpu_hatch_register(self, gtmr_fdt_cpu_hatch);
80}
81
82static void
83gtmr_fdt_cpu_hatch(void *priv, struct cpu_info *ci)
84{
85	gtmr_init_cpu_clock(ci);
86}
87