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
23 #include <plat/omap_hwmod.h>
24 #include <plat/omap_device.h>
25
26 struct omap_device_pm_latency omap_spinlock_latency[] = {
27 {
28 .deactivate_func = omap_device_idle_hwmods,
29 .activate_func = omap_device_enable_hwmods,
30 .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
31 }
32 };
33
hwspinlocks_init(void)34 int __init hwspinlocks_init(void)
35 {
36 int retval = 0;
37 struct omap_hwmod *oh;
38 struct omap_device *od;
39 const char *oh_name = "spinlock";
40 const char *dev_name = "omap_hwspinlock";
41
42 /*
43 * Hwmod lookup will fail in case our platform doesn't support the
44 * hardware spinlock module, so it is safe to run this initcall
45 * on all omaps
46 */
47 oh = omap_hwmod_lookup(oh_name);
48 if (oh == NULL)
49 return -EINVAL;
50
51 od = omap_device_build(dev_name, 0, oh, NULL, 0,
52 omap_spinlock_latency,
53 ARRAY_SIZE(omap_spinlock_latency), false);
54 if (IS_ERR(od)) {
55 pr_err("Can't build omap_device for %s:%s\n", dev_name,
56 oh_name);
57 retval = PTR_ERR(od);
58 }
59
60 return retval;
61 }
62 /* early board code might need to reserve specific hwspinlock instances */
63 postcore_initcall(hwspinlocks_init);
64