hwspinlock.c

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/*
 * OMAP hardware spinlock device initialization
 *
 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com
 *
 * Contact: Simon Que <[email protected]>
 *          Hari Kanigeri <[email protected]>
 *
 * 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.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/hwspinlock.h>

#include <plat/omap_hwmod.h>
#include <plat/omap_device.h>

static struct hwspinlock_pdata omap_hwspinlock_pdata __initdata = {
    .base_id = 0,
};

static int __init hwspinlocks_init(void)
{
    int retval = 0;
    struct omap_hwmod *oh;
    struct platform_device *pdev;
    const char *oh_name = "spinlock";
    const char *dev_name = "omap_hwspinlock";

    /*
     * Hwmod lookup will fail in case our platform doesn't support the
     * hardware spinlock module, so it is safe to run this initcall
     * on all omaps
     */
    oh = omap_hwmod_lookup(oh_name);
    if (oh == NULL)
        return -EINVAL;

    pdev = omap_device_build(dev_name, 0, oh, &omap_hwspinlock_pdata,
                sizeof(struct hwspinlock_pdata),
                NULL, 0, false);
    if (IS_ERR(pdev)) {
        pr_err("Can't build omap_device for %s:%s\n", dev_name,
                                oh_name);
        retval = PTR_ERR(pdev);
    }

    return retval;
}
/* early board code might need to reserve specific hwspinlock instances */
postcore_initcall(hwspinlocks_init);