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21325b25f4
There are several CM operations which behave similarly across OMAP2+ SoCs, but which have slight differences in their underlying implementations. This patch creates the support code for this function pointer registration process. No function pointers are included yet, but a subsequent patch will create these for the module IDLEST registers. This patch allows other code to use CM-provided data and operations without needing to know which SoC is currently in use. A further description of the concept is provided in the patch entitled "ARM: OMAP2+: PRM: prepare for use of prm_ll_data function pointers". Signed-off-by: Paul Walmsley <paul@pwsan.com>
49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
/*
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* OMAP2+ Clock Management prototypes
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*
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* Copyright (C) 2007-2009 Texas Instruments, Inc.
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* Copyright (C) 2007-2009 Nokia Corporation
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*
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* Written by Paul Walmsley
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ARCH_ASM_MACH_OMAP2_CM_H
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#define __ARCH_ASM_MACH_OMAP2_CM_H
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/*
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* MAX_MODULE_READY_TIME: max duration in microseconds to wait for the
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* PRCM to request that a module exit the inactive state in the case of
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* OMAP2 & 3.
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* In the case of OMAP4 this is the max duration in microseconds for the
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* module to reach the functionnal state from an inactive state.
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*/
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#define MAX_MODULE_READY_TIME 2000
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/*
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* MAX_MODULE_DISABLE_TIME: max duration in microseconds to wait for
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* the PRCM to request that a module enter the inactive state in the
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* case of OMAP2 & 3. In the case of OMAP4 this is the max duration
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* in microseconds for the module to reach the inactive state from
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* a functional state.
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* XXX FSUSB on OMAP4430 takes ~4ms to idle after reset during
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* kernel init.
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*/
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#define MAX_MODULE_DISABLE_TIME 5000
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# ifndef __ASSEMBLER__
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/**
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* struct cm_ll_data - fn ptrs to per-SoC CM function implementations
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*/
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struct cm_ll_data {};
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extern int cm_register(struct cm_ll_data *cld);
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extern int cm_unregister(struct cm_ll_data *cld);
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# endif
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#endif
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