mirror of https://gitee.com/openkylin/linux.git
73 lines
2.5 KiB
C
73 lines
2.5 KiB
C
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/*
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* OMAP SoC specific OPP Data helpers
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*
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* Copyright (C) 2009-2010 Texas Instruments Incorporated - http://www.ti.com/
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* Nishanth Menon
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* Kevin Hilman
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* Copyright (C) 2010 Nokia Corporation.
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* Eduardo Valentin
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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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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __ARCH_ARM_MACH_OMAP2_OMAP_OPP_DATA_H
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#define __ARCH_ARM_MACH_OMAP2_OMAP_OPP_DATA_H
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#include <plat/omap_hwmod.h>
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/*
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* *BIG FAT WARNING*:
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* USE the following ONLY in opp data initialization common to an SoC.
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* DO NOT USE these in board files/pm core etc.
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*/
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/**
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* struct omap_opp_def - OMAP OPP Definition
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* @hwmod_name: Name of the hwmod for this domain
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* @freq: Frequency in hertz corresponding to this OPP
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* @u_volt: Nominal voltage in microvolts corresponding to this OPP
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* @default_available: True/false - is this OPP available by default
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*
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* OMAP SOCs have a standard set of tuples consisting of frequency and voltage
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* pairs that the device will support per voltage domain. This is called
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* Operating Points or OPP. The actual definitions of OMAP Operating Points
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* varies over silicon within the same family of devices. For a specific
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* domain, you can have a set of {frequency, voltage} pairs and this is denoted
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* by an array of omap_opp_def. As the kernel boots and more information is
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* available, a set of these are activated based on the precise nature of
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* device the kernel boots up on. It is interesting to remember that each IP
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* which belongs to a voltage domain may define their own set of OPPs on top
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* of this - but this is handled by the appropriate driver.
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*/
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struct omap_opp_def {
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char *hwmod_name;
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unsigned long freq;
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unsigned long u_volt;
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bool default_available;
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};
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/*
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* Initialization wrapper used to define an OPP for OMAP variants.
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*/
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#define OPP_INITIALIZER(_hwmod_name, _enabled, _freq, _uv) \
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{ \
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.hwmod_name = _hwmod_name, \
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.default_available = _enabled, \
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.freq = _freq, \
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.u_volt = _uv, \
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}
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/* Use this to initialize the default table */
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extern int __init omap_init_opp_table(struct omap_opp_def *opp_def,
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u32 opp_def_size);
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#endif /* __ARCH_ARM_MACH_OMAP2_OMAP_OPP_DATA_H */
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