hwspinlock/core/omap: fix id issues on multiple hwspinlock devices
[linux-2.6.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 <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
31 struct omap_device_pm_latency omap_spinlock_latency[] = {
32         {
33                 .deactivate_func = omap_device_idle_hwmods,
34                 .activate_func   = omap_device_enable_hwmods,
35                 .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
36         }
37 };
38
39 int __init hwspinlocks_init(void)
40 {
41         int retval = 0;
42         struct omap_hwmod *oh;
43         struct omap_device *od;
44         const char *oh_name = "spinlock";
45         const char *dev_name = "omap_hwspinlock";
46
47         /*
48          * Hwmod lookup will fail in case our platform doesn't support the
49          * hardware spinlock module, so it is safe to run this initcall
50          * on all omaps
51          */
52         oh = omap_hwmod_lookup(oh_name);
53         if (oh == NULL)
54                 return -EINVAL;
55
56         od = omap_device_build(dev_name, 0, oh, &omap_hwspinlock_pdata,
57                                 sizeof(struct hwspinlock_pdata),
58                                 omap_spinlock_latency,
59                                 ARRAY_SIZE(omap_spinlock_latency), false);
60         if (IS_ERR(od)) {
61                 pr_err("Can't build omap_device for %s:%s\n", dev_name,
62                                                                 oh_name);
63                 retval = PTR_ERR(od);
64         }
65
66         return retval;
67 }
68 /* early board code might need to reserve specific hwspinlock instances */
69 postcore_initcall(hwspinlocks_init);