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 
ux500_timer_init(void)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 }
49