| Sekhar Nori | efc1bb8 | 2009-12-17 18:29:31 +0530 | [diff] [blame] | 1 | /* |
| 2 | * TI DaVinci platform support for power management. |
| 3 | * |
| 4 | * Copyright (C) 2009 Texas Instruments, Inc. http://www.ti.com/ |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License as |
| 8 | * published by the Free Software Foundation version 2. |
| 9 | * |
| 10 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any |
| 11 | * kind, whether express or implied; without even the implied warranty |
| 12 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | */ |
| 15 | #ifndef _MACH_DAVINCI_PM_H |
| 16 | #define _MACH_DAVINCI_PM_H |
| 17 | |
| 18 | /* |
| 19 | * Caution: Assembly code in sleep.S makes assumtion on the order |
| 20 | * of the members of this structure. |
| 21 | */ |
| 22 | struct davinci_pm_config { |
| 23 | void __iomem *ddr2_ctlr_base; |
| 24 | void __iomem *ddrpsc_reg_base; |
| 25 | int ddrpsc_num; |
| 26 | void __iomem *ddrpll_reg_base; |
| 27 | void __iomem *deepsleep_reg; |
| 28 | void __iomem *cpupll_reg_base; |
| 29 | /* |
| 30 | * Note on SLEEPCOUNT: |
| 31 | * The SLEEPCOUNT feature is mainly intended for cases in which |
| 32 | * the internal oscillator is used. The internal oscillator is |
| 33 | * fully disabled in deep sleep mode. When you exist deep sleep |
| 34 | * mode, the oscillator will be turned on and will generate very |
| 35 | * small oscillations which will not be detected by the deep sleep |
| 36 | * counter. Eventually those oscillations will grow to an amplitude |
| 37 | * large enough to start incrementing the deep sleep counter. |
| 38 | * In this case recommendation from hardware engineers is that the |
| 39 | * SLEEPCOUNT be set to 4096. This means that 4096 valid clock cycles |
| 40 | * must be detected before the clock is passed to the rest of the |
| 41 | * system. |
| 42 | * In the case that the internal oscillator is not used and the |
| 43 | * clock is generated externally, the SLEEPCOUNT value can be very |
| 44 | * small since the clock input is assumed to be stable before SoC |
| 45 | * is taken out of deepsleep mode. A value of 128 would be more than |
| 46 | * adequate. |
| 47 | */ |
| 48 | int sleepcount; |
| 49 | }; |
| 50 | |
| 51 | extern unsigned int davinci_cpu_suspend_sz; |
| 52 | extern void davinci_cpu_suspend(struct davinci_pm_config *); |
| 53 | |
| 54 | #endif |