#if defined(CONFIG_BCM_KF_ARM_BCM963XX)
/*
<:copyright-BRCM:2013:DUAL/GPL:standard

   Copyright (c) 2013 Broadcom 
   All Rights Reserved

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 (the "GPL").

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.


A copy of the GPL is available at http://www.broadcom.com/licenses/GPLv2.php, or by
writing to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.

:>
*/

/*
 * Top-level clock management API
 * see include/linux/clk.h for description.
 * These routines are hardware-independent,
 * and all hardware-specific code is invoked
 * through the "ops" methods.
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/clk.h>
#include <linux/mutex.h>
#include <mach/clkdev.h>

int clk_enable(struct clk *clk)
{
	int ret;

	ret = atomic_inc_return(&clk->ena_cnt);
	if (ret > 1)
		return 0;

	/* Continue of count was moved from 0 to 1 - reentrant */
	if (clk->parent)
		ret = clk_enable(clk->parent);
	else
		ret = 0;

#if !defined(CONFIG_BCM63138_SIM) && !defined(CONFIG_BCM63148_SIM)
	if (ret == 0) {
		if (!clk->ops || !clk->ops->enable) {
			if (clk->rate)
				ret = 0;
			else
				ret = -EIO;
		} else
			ret = clk->ops->enable(clk);
	}
#endif

	if (ret != 0)
		atomic_dec(&clk->ena_cnt);

	return ret;
}
EXPORT_SYMBOL(clk_enable);

void clk_disable(struct clk *clk)
{
	int ret;

	ret = atomic_dec_return(&clk->ena_cnt);

	/* Continue if this is the last client to disable - reentrant */
	if (ret > 0)
		return;
	BUG_ON(ret < 0);

#if !defined(CONFIG_BCM63138_SIM) && !defined(CONFIG_BCM63148_SIM)
	if (!clk->ops || !clk->ops->disable)
		return;

	clk->ops->disable(clk);

	if (clk->parent)
		clk_disable(clk->parent);
#endif

	return;
}
EXPORT_SYMBOL(clk_disable);

unsigned long clk_get_rate(struct clk *clk)
{
	/* Recurse to update parent's frequency */
	if (clk->parent)
		clk_get_rate(clk->parent);
	/* Read hardware registers if needed */
	if (clk->ops && clk->ops->status)
		clk->ops->status(clk);
	return clk->rate;
}
EXPORT_SYMBOL(clk_get_rate);

long clk_round_rate(struct clk *clk, unsigned long rate)
{
#if defined(CONFIG_BCM63138_SIM) || defined(CONFIG_BCM63148_SIM)
	return 0;
#else
	long ret = -EIO;
	if (clk->ops && clk->ops->round)
		ret = clk->ops->round(clk, rate);
	return ret;
#endif
}
EXPORT_SYMBOL(clk_round_rate);

int clk_set_rate(struct clk *clk, unsigned long rate)
{
#if defined(CONFIG_BCM63138_SIM) || defined(CONFIG_BCM63148_SIM)
	return 0;
#else
	int ret = -EIO;

	if (rate == clk->rate)
		return 0;

	if (clk->ops && clk->ops->setrate)
		ret = clk->ops->setrate(clk, rate);

	return ret;
#endif
}
EXPORT_SYMBOL(clk_set_rate);

/*
 * clk_get(), clk_put() are implemented in drivers/clk/clkdev.c
 * but it needs these two stub functions for platform-specific operations.
 * Return 1 on success 0 on failure.
 */
int __clk_get(struct clk *clk)
{
#if !defined(CONFIG_BCM63138_SIM) && !defined(CONFIG_BCM63148_SIM)
	int ret;

	ret = atomic_inc_return(&clk->use_cnt);
	if (ret > 1)
		return 1;
	if (clk->parent)
		return __clk_get(clk->parent);
#endif
	return 1;
}
EXPORT_SYMBOL(__clk_get);

void __clk_put(struct clk *clk)
{
#if !defined(CONFIG_BCM63138_SIM) && !defined(CONFIG_BCM63148_SIM)
	int ret;

	ret = atomic_dec_return(&clk->use_cnt);
	if (ret > 0)
		return;

	BUG_ON(ret < 0);

	if (clk->parent)
		__clk_put(clk->parent);
#endif
}
EXPORT_SYMBOL(__clk_put);
#endif /* CONFIG_BCM_KF_ARM_BCM963XX */