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54 lines
2.0 KiB
54 lines
2.0 KiB
/* |
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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. https://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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