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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2010 by Michael Sevakis
*
* i.MX31 DVFS and DPTC drivers
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "system.h"
#include "ccm-imx31.h"
#include "mc13783.h"
/* Most of the code in here is based upon the Linux BSP provided by Freescale
* Copyright 2004-2008 Freescale Semiconductor, Inc. All Rights Reserved. */
void dvfs_dptc_start(void)
{
/* For now, just set the regulator voltage off of overdrive mode */
/* For 264 MHz, DPTC is not needed and lower V can be used */
mc13783_write_masked(MC13783_SWITCHERS0,
MC13783_SW_1_350 << MC13783_SW1A_POS,
MC13783_SW1A);
imx31_regmod32(&CCM_PMCR0, CCM_PMCR0_DVS1_0_DVS0_0,
CCM_PMCR0_DVSUP_DVS);
}
void dvfs_dptc_stop(void)
{
/* Nothing for now */
}
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