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/*
* Copyright (C) 2012 Spreadtrum Communications Inc.
* Author: steve.zhan <steve.zhan@spreadtrum.com>
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* 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/platform_device.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/hwspinlock.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <soc/sprd/sci.h>
#include <soc/sprd/arch_lock.h>
#include <linux/of_irq.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include "devices.h"
/**
* Each physical lock must have a system-wide id number
* that is agreed upon, otherwise remote processors can't possibly assume
* they're using the same hardware lock.
*/
struct hwspinlock *hwlocks[HWSPINLOCK_ID_TOTAL_NUMS];
unsigned char __initdata hwlocks_implemented[HWSPINLOCK_ID_TOTAL_NUMS];
unsigned int hwspinlock_vid;
unsigned char local_hwlocks_status[HWSPINLOCK_ID_TOTAL_NUMS];/*array[0] standfor lock0*/
int __init early_init_hwlocks(void)
{
int i;
struct hwspinlock **plock;
arch_hwlocks_implemented();
for (i = 0; i < HWSPINLOCK_ID_TOTAL_NUMS; ++i) {
if (hwlocks_implemented[i]) {
plock = &hwlocks[i];
*plock = hwspin_lock_request_specific(i);
if (WARN_ON(IS_ERR_OR_NULL(*plock)))
*plock = NULL;
else
pr_info("early alloc hwspinlock id %d\n",
hwspin_lock_get_id(*plock));
}
}
return 0;
}
static int remove_node(struct device_node *np)
{
struct property *ps;
ps = kzalloc(sizeof(*ps), GFP_KERNEL);
if (!ps)
return -1;
ps->value = kstrdup("no", GFP_KERNEL);
ps->length = strlen(ps->value);
ps->name = kstrdup("status", GFP_KERNEL);
of_update_property(np, ps);
printk("After register,hwspinlock1 node available=%d\n",of_device_is_available(np));
return 0;
}
int __init hwspinlocks_init(void)
{
struct device_node *np;
struct platform_device *pdev;
int ret;
np = of_find_node_by_name(NULL, "hwspinlock1");
if (!np) {
pr_warn("Can't get the hwspinlock1 node!\n");
return -ENODEV;
}
pdev = of_platform_device_create(np, 0, NULL);
if (!pdev) {
pr_warn("register hwspinlock1 failed!\n");
return -ENODEV;
}
pr_info("SPRD register hwspinlock1 ok,hwspinlock1's name is %s!\n",pdev->name);
ret = remove_node(np);
return ret;
}
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