/* SPDX-License-Identifier: GPL-2.0-only */
/*
* TI DaVinci platform support for power management .
*
* Copyright ( C ) 2009 Texas Instruments , Inc . https : //www.ti.com/
*/
#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
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