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 <plat/omap_hwmod.h>
25 #include <plat/omap_device.h>
26
27 static struct hwspinlock_pdata omap_hwspinlock_pdata __initdata = {
28 .base_id = 0,
29 };
30
hwspinlocks_init(void)31 int __init hwspinlocks_init(void)
32 {
33 int retval = 0;
34 struct omap_hwmod *oh;
35 struct platform_device *pdev;
36 const char *oh_name = "spinlock";
37 const char *dev_name = "omap_hwspinlock";
38
39 /*
40 * Hwmod lookup will fail in case our platform doesn't support the
41 * hardware spinlock module, so it is safe to run this initcall
42 * on all omaps
43 */
44 oh = omap_hwmod_lookup(oh_name);
45 if (oh == NULL)
46 return -EINVAL;
47
48 pdev = omap_device_build(dev_name, 0, oh, &omap_hwspinlock_pdata,
49 sizeof(struct hwspinlock_pdata),
50 NULL, 0, false);
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 postcore_initcall(hwspinlocks_init);
61