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/arch/arm/mach-omap2/hwspinlock.c

https://github.com/AICP/kernel_asus_grouper
C | 63 lines | 33 code | 7 blank | 23 comment | 3 complexity | 9dac1039c5d0a0aa5a17e475a325b34a MD5 | raw file
 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
26struct 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
34int __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 */
63postcore_initcall(hwspinlocks_init);