/*
* OMAP2/3/4 clockdomain framework functions
*
* Copyright (C) 2008-2011 Texas Instruments, Inc.
* Copyright (C) 2008-2011 Nokia Corporation
*
* Written by Paul Walmsley and Jouni Högander
* Added OMAP4 specific support by Abhijit Pagare <abhijitpagare@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.
*/
#undef DEBUG
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/limits.h>
#include <linux/err.h>
#include <linux/clk-provider.h>
#include <linux/io.h>
#include <linux/bitops.h>
#include "soc.h"
#include "clock.h"
#include "clockdomain.h"
/* clkdm_list contains all registered struct clockdomains */
static LIST_HEAD(clkdm_list);
/* array of clockdomain deps to be added/removed when clkdm in hwsup mode */
static struct clkdm_autodep *autodeps;
static struct clkdm_ops *arch_clkdm;
/* Private functions */
static struct clockdomain *_clkdm_lookup(const char *name)
{
struct clockdomain *clkdm, *temp_clkdm;
if (!name)
return NULL;
clkdm = NULL;
list_for_each_entry(temp_clkdm, &clkdm_list, node) {
if (!strcmp(name, temp_clkdm->name)) {
clkdm = temp_clkdm;
break;
}
}
return clkdm;
}
/**
* _clkdm_register - register a clockdomain
* @clkdm: struct clockdomain * to register
*
* Adds a clockdomain to the internal clockdomain list.
* Returns -EINVAL if given a null pointer, -EEXIST if a clockdomain is
* already registered by the provided name, or 0 upon success.
*/
static int _clkdm_register(struct clockdomain *clkdm)
{
struct powerdomain *pwrdm;
if (!clkdm || !clkdm->name)
return -EINVAL;
pwrdm = pwrdm_lookup(clkdm->pwrdm.name);
if (!pwrdm) {
pr_err("clockdomain: %s: powerdomain %s does not exist\n",
clkdm->name, clkdm->pwrdm.name);
return -EINVAL;
}
clkdm->pwrdm.ptr = pwrdm;
/* Verify that the clockdomain is not already registered */
if (_clkdm_lookup(clkdm->name))
return -EEXIST;
list_add(&clkdm->node, &clkdm_list);
pwrdm_add_clkdm(pwrdm, clkdm);
pr_debug("clockdomain: registered %s\n", clkdm->name);
return 0;
}
/* _clkdm_deps_lookup - look up the specified clockdomain in a clkdm list */
static struct clkdm_dep *_clkdm_deps_lookup(struct clockdomain *clkdm