55 строки
2.0 KiB
C
55 строки
2.0 KiB
C
/*
|
|
* 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
|