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/*
* OMAP hardware spinlock device initialization
*
* Copyright (C) 2010 Texas Instruments. All rights reserved.
*
* Contact: Simon Que <sque@ti.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <plat/hwspinlock.h>
#include <plat/omap_device.h>
#include <plat/omap_hwmod.h>
/* Spinlock register offsets */
#define REVISION_OFFSET 0x0000
#define SYSCONFIG_OFFSET 0x0010
#define SYSSTATUS_OFFSET 0x0014
#define LOCK_BASE_OFFSET 0x0800
#define LOCK_OFFSET(i) (LOCK_BASE_OFFSET + 0x4 * (i))
struct omap_device_pm_latency omap_spinlock_latency[] = {
{
.deactivate_func = omap_device_idle_hwmods,
.activate_func = omap_device_enable_hwmods,
.flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
}
};
/* Initialization function */
int __init hwspinlocks_init(void)
{
int retval = 0;
struct hwspinlock_plat_info *pdata;
struct omap_hwmod *oh;
char *oh_name, *pdev_name;
if (!cpu_is_omap44xx())
return -EINVAL;
oh_name = "spinlock";
oh = omap_hwmod_lookup(oh_name);
if (WARN_ON(oh == NULL))
return -EINVAL;
pdev_name = "hwspinlock";
/* Pass data to device initialization */
pdata = kzalloc(sizeof(struct hwspinlock_plat_info), GFP_KERNEL);
if (WARN_ON(pdata == NULL))
return -ENOMEM;
pdata->sysstatus_offset = SYSSTATUS_OFFSET;
pdata->lock_base_offset = LOCK_BASE_OFFSET;
omap_device_build(pdev_name, 0, oh, pdata,
sizeof(struct hwspinlock_plat_info), omap_spinlock_latency,
ARRAY_SIZE(omap_spinlock_latency), false);
return retval;
}
postcore_initcall(hwspinlocks_init);
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