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Diffstat (limited to 'arch/arm/mach-davinci/pm.h')
| -rw-r--r-- | arch/arm/mach-davinci/pm.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/pm.h b/arch/arm/mach-davinci/pm.h new file mode 100644 index 000000000..6f50d6eb8 --- /dev/null +++ b/arch/arm/mach-davinci/pm.h @@ -0,0 +1,46 @@ +/* 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 |