Merge tag 'dt-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[linux-3.10.git] / arch / arm / mach-omap2 / hwspinlock.c
1 /*
2  * OMAP hardware spinlock device initialization
3  *
4  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com
5  *
6  * Contact: Simon Que <sque@ti.com>
7  *          Hari Kanigeri <h-kanigeri2@ti.com>
8  *
9  * This program is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU General Public License
11  * version 2 as published by the Free Software Foundation.
12  *
13  * This program is distributed in the hope that it will be useful, but
14  * WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * General Public License for more details.
17  */
18
19 #include <linux/kernel.h>
20 #include <linux/init.h>
21 #include <linux/err.h>
22 #include <linux/hwspinlock.h>
23
24 #include "soc.h"
25 #include "omap_hwmod.h"
26 #include "omap_device.h"
27
28 static struct hwspinlock_pdata omap_hwspinlock_pdata __initdata = {
29         .base_id = 0,
30 };
31
32 static int __init hwspinlocks_init(void)
33 {
34         int retval = 0;
35         struct omap_hwmod *oh;
36         struct platform_device *pdev;
37         const char *oh_name = "spinlock";
38         const char *dev_name = "omap_hwspinlock";
39
40         /*
41          * Hwmod lookup will fail in case our platform doesn't support the
42          * hardware spinlock module, so it is safe to run this initcall
43          * on all omaps
44          */
45         oh = omap_hwmod_lookup(oh_name);
46         if (oh == NULL)
47                 return -EINVAL;
48
49         pdev = omap_device_build(dev_name, 0, oh, &omap_hwspinlock_pdata,
50                                 sizeof(struct hwspinlock_pdata));
51         if (IS_ERR(pdev)) {
52                 pr_err("Can't build omap_device for %s:%s\n", dev_name,
53                                                                 oh_name);
54                 retval = PTR_ERR(pdev);
55         }
56
57         return retval;
58 }
59 /* early board code might need to reserve specific hwspinlock instances */
60 omap_postcore_initcall(hwspinlocks_init);