pm.h

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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