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/*
* TI DaVinci platform support for power management.
*
* Copyright (C) 2009 Texas Instruments, Inc. http://www.ti.com/
*
* 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 version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef _MACH_DAVINCI_PM_H
#define _MACH_DAVINCI_PM_H
/*
* Caution: Assembly code in sleep.S makes assumtion on the order
* of the members of this structure.
*/
struct davinci_pm_config {
void __iomem *ddr2_ctlr_base;
void __iomem *ddrpsc_reg_base;
int ddrpsc_num;
void __iomem *ddrpll_reg_base;
void __iomem *deepsleep_reg;
void __iomem *cpupll_reg_base;
/*
* Note on SLEEPCOUNT:
* The SLEEPCOUNT feature is mainly intended for cases in which
* the internal oscillator is used. The internal oscillator is
* fully disabled in deep sleep mode. When you exist deep sleep
* mode, the oscillator will be turned on and will generate very
* small oscillations which will not be detected by the deep sleep
* counter. Eventually those oscillations will grow to an amplitude
* large enough to start incrementing the deep sleep counter.
* In this case recommendation from hardware engineers is that the
* SLEEPCOUNT be set to 4096. This means that 4096 valid clock cycles
* must be detected before the clock is passed to the rest of the
* system.
* In the case that the internal oscillator is not used and the
* clock is generated externally, the SLEEPCOUNT value can be very
* small since the clock input is assumed to be stable before SoC
* is taken out of deepsleep mode. A value of 128 would be more than
* adequate.
*/
int sleepcount;
};
extern unsigned int davinci_cpu_suspend_sz;
extern void davinci_cpu_suspend(struct davinci_pm_config *);
#endif
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