treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282
[sfrench/cifs-2.6.git] / drivers / clocksource / timer-probe.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
4  */
5
6 #include <linux/acpi.h>
7 #include <linux/init.h>
8 #include <linux/of.h>
9 #include <linux/clocksource.h>
10
11 extern struct of_device_id __timer_of_table[];
12
13 static const struct of_device_id __timer_of_table_sentinel
14         __used __section(__timer_of_table_end);
15
16 void __init timer_probe(void)
17 {
18         struct device_node *np;
19         const struct of_device_id *match;
20         of_init_fn_1_ret init_func_ret;
21         unsigned timers = 0;
22         int ret;
23
24         for_each_matching_node_and_match(np, __timer_of_table, &match) {
25                 if (!of_device_is_available(np))
26                         continue;
27
28                 init_func_ret = match->data;
29
30                 ret = init_func_ret(np);
31                 if (ret) {
32                         pr_err("Failed to initialize '%pOF': %d\n", np, ret);
33                         continue;
34                 }
35
36                 timers++;
37         }
38
39         timers += acpi_probe_device_table(timer);
40
41         if (!timers)
42                 pr_crit("%s: no matching timers found\n", __func__);
43 }