tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (c) 2016, Linaro Ltd. All rights reserved.
3 * Daniel Lezcano <daniel.lezcano@linaro.org>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18#include <linux/init.h>
19#include <linux/of.h>
20#include <linux/clockchips.h>
21
22extern struct of_device_id __clkevt_of_table[];
23
24static const struct of_device_id __clkevt_of_table_sentinel
25 __used __section(__clkevt_of_table_end);
26
27int __init clockevent_probe(void)
28{
29 struct device_node *np;
30 const struct of_device_id *match;
31 of_init_fn_1_ret init_func;
32 int ret, clockevents = 0;
33
34 for_each_matching_node_and_match(np, __clkevt_of_table, &match) {
35 if (!of_device_is_available(np))
36 continue;
37
38 init_func = match->data;
39
40 ret = init_func(np);
41 if (ret) {
42 pr_warn("Failed to initialize '%s' (%d)\n",
43 np->name, ret);
44 continue;
45 }
46
47 clockevents++;
48 }
49
50 if (!clockevents) {
51 pr_crit("%s: no matching clockevent found\n", __func__);
52 return -ENODEV;
53 }
54
55 return 0;
56}