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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (c) 2008 Michael Sevakis
*
* Clock control functions for IMX31 processor
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "system.h"
#include "cpu.h"
#include "clkctl-imx31.h"
void imx31_clkctl_module_clock_gating(enum IMX31_CG_LIST cg,
enum IMX31_CG_MODES mode)
{
volatile unsigned long *reg;
unsigned long mask;
int shift;
int oldlevel;
if (cg >= CG_NUM_CLOCKS)
return;
reg = &CLKCTL_CGR0 + cg / 16; /* Select CGR0, CGR1, CGR2 */
shift = 2*(cg % 16); /* Get field shift */
mask = CG_MASK << shift; /* Select field */
oldlevel = disable_interrupt_save(IRQ_FIQ_STATUS);
*reg = (*reg & ~mask) | ((mode << shift) & mask);
restore_interrupt(oldlevel);
}
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