LXR linux/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
  27static struct hwspinlock_pdata omap_hwspinlock_pdata __initdata = {
  28        .base_id = 0,
  29};
  30
  31int __init hwspinlocks_init(void)
  32{
  33        int retval = 0;
  34        struct omap_hwmod *oh;
  35        struct platform_device *pdev;
  36        const char *oh_name = "spinlock";
  37        const char *dev_name = "omap_hwspinlock";
  38
  39        /*
  40         * Hwmod lookup will fail in case our platform doesn't support the
  41         * hardware spinlock module, so it is safe to run this initcall
  42         * on all omaps
  43         */
  44        oh = omap_hwmod_lookup(oh_name);
  45        if (oh == NULL)
  46                return -EINVAL;
  47
  48        pdev = omap_device_build(dev_name, 0, oh, &omap_hwspinlock_pdata,
  49                                sizeof(struct hwspinlock_pdata),
  50                                NULL, 0, false);
  51        if (IS_ERR(pdev)) {
  52                pr_err("Can't build omap_device for %s:%s\n", dev_name,
  53                                                                oh_name);
  54                retval = PTR_ERR(pdev);
  55        }
  56
  57        return retval;
  58}
  59/* early board code might need to reserve specific hwspinlock instances */
  60postcore_initcall(hwspinlocks_init);
  61