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1 /*
2  * Copyright (C) ST-Ericsson SA 2011
3  *
4  * License Terms: GNU General Public License v2
5  * Author: Mattias Wallin <mattias.wallin@stericsson.com> for ST-Ericsson
6  */
7 #include <linux/io.h>
8 #include <linux/errno.h>
9 #include <linux/clksrc-dbx500-prcmu.h>
10 #include <linux/clocksource.h>
11 #include <linux/of.h>
12 #include <linux/of_address.h>
13
14 #include "setup.h"
15
16 #include "db8500-regs.h"
17 #include "id.h"
18
19 static const struct of_device_id prcmu_timer_of_match[] __initconst = {
20         { .compatible = "stericsson,db8500-prcmu-timer-4", },
21         { },
22 };
23
24 void __init ux500_timer_init(void)
25 {
26         void __iomem *prcmu_timer_base;
27         void __iomem *tmp_base;
28         struct device_node *np;
29
30         if (cpu_is_u8500_family() || cpu_is_ux540_family())
31                 prcmu_timer_base = __io_address(U8500_PRCMU_TIMER_4_BASE);
32         else
33                 ux500_unknown_soc();
34
35         np = of_find_matching_node(NULL, prcmu_timer_of_match);
36         if (!np)
37                 goto dt_fail;
38
39         tmp_base = of_iomap(np, 0);
40         if (!tmp_base)
41                 goto dt_fail;
42
43         prcmu_timer_base = tmp_base;
44
45 dt_fail:
46         clksrc_dbx500_prcmu_init(prcmu_timer_base);
47         clocksource_probe();
48 }