1 /* 2 * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 11 * more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. 15 */ 16 17 #include <linux/acpi.h> 18 #include <linux/init.h> 19 #include <linux/of.h> 20 #include <linux/clocksource.h> 21 22 extern struct of_device_id __timer_of_table[]; 23 24 static const struct of_device_id __timer_of_table_sentinel 25 __used __section(__timer_of_table_end); 26 27 void __init timer_probe(void) 28 { 29 struct device_node *np; 30 const struct of_device_id *match; 31 of_init_fn_1_ret init_func_ret; 32 unsigned timers = 0; 33 int ret; 34 35 for_each_matching_node_and_match(np, __timer_of_table, &match) { 36 if (!of_device_is_available(np)) 37 continue; 38 39 init_func_ret = match->data; 40 41 ret = init_func_ret(np); 42 if (ret) { 43 pr_err("Failed to initialize '%pOF': %d\n", np, ret); 44 continue; 45 } 46 47 timers++; 48 } 49 50 timers += acpi_probe_device_table(timer); 51 52 if (!timers) 53 pr_crit("%s: no matching timers found\n", __func__); 54 } 55