| /* |
| * TI DaVinci platform support for power management. |
| * |
| * Copyright (C) 2009 Texas Instruments, Inc. https://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 |
