/*
 * pm.c - Common OMAP2+ power management-related code
 *
 * Copyright (C) 2010 Texas Instruments, Inc.
 * Copyright (C) 2010 Nokia Corporation
 *
 * 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.
 */

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

#include <plat/omap-pm.h>
#include <plat/omap_device.h>
#include <plat/common.h>

#include "omap3-opp.h"
#include "opp44xx.h"

static struct omap_device_pm_latency *pm_lats;

static struct device *mpu_dev;
static struct device *iva_dev;
static struct device *l3_dev;
static struct device *dsp_dev;

struct device *omap2_get_mpuss_device(void)
{
	WARN_ON_ONCE(!mpu_dev);
	return mpu_dev;
}
EXPORT_SYMBOL(omap2_get_mpuss_device);

struct device *omap2_get_iva_device(void)
{
	WARN_ON_ONCE(!iva_dev);
	return iva_dev;
}
EXPORT_SYMBOL(omap2_get_iva_device);

struct device *omap2_get_l3_device(void)
{
	WARN_ON_ONCE(!l3_dev);
	return l3_dev;
}
EXPORT_SYMBOL(omap2_get_l3_device);

struct device *omap4_get_dsp_device(void)
{
	WARN_ON_ONCE(!dsp_dev);
	return dsp_dev;
}
EXPORT_SYMBOL(omap4_get_dsp_device);

/* static int _init_omap_device(struct omap_hwmod *oh, void *user) */
static int _init_omap_device(char *name, struct device **new_dev)
{
	struct omap_hwmod *oh;
	struct omap_device *od;

	oh = omap_hwmod_lookup(name);
	if (WARN(!oh, "%s: could not find omap_hwmod for %s\n",
		 __func__, name))
		return -ENODEV;
	od = omap_device_build(oh->name, 0, oh, NULL, 0, pm_lats, 0, false);
	if (WARN(IS_ERR(od), "%s: could not build omap_device for %s\n",
		 __func__, name))
		return -ENODEV;

	*new_dev = &od->pdev.dev;

	return 0;
}

/*
 * Build omap_devices for processors and bus.
 */
static void omap2_init_processor_devices(void)
{
	struct omap_hwmod *oh;

	_init_omap_device("mpu", &mpu_dev);
#if 0
	_init_omap_device("iva", &iva_dev);
	if (cpu_is_omap44xx())
		_init_omap_device("dsp", &dsp_dev);
#endif
	oh = omap_hwmod_lookup("iva");
	if (oh && oh->od)
		iva_dev = &oh->od->pdev.dev;

	oh = omap_hwmod_lookup("dsp");
	if (oh && oh->od)
		dsp_dev = &oh->od->pdev.dev;

	if (cpu_is_omap44xx())
		_init_omap_device("l3_main_1", &l3_dev);
	else
		_init_omap_device("l3_main", &l3_dev);
}

static int __init omap2_common_pm_init(void)
{
	omap2_init_processor_devices();
	if (cpu_is_omap34xx())
		omap3_pm_init_opp_table();
	else if (cpu_is_omap44xx())
		omap4_pm_init_opp_table();

	omap_pm_if_init();

	return 0;
}
device_initcall(omap2_common_pm_init);