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