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https://github.com/torvalds/linux
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128 lines
4.2 KiB
C
128 lines
4.2 KiB
C
/*
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* OMAP3/4 Voltage Processor (VP) structure and macro definitions
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*
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* Copyright (C) 2007, 2010 Texas Instruments, Inc.
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* Rajendra Nayak <rnayak@ti.com>
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* Lesly A M <x0080970@ti.com>
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* Thara Gopinath <thara@ti.com>
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*
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* Copyright (C) 2008, 2011 Nokia Corporation
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* Kalle Jokiniemi
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* Paul Walmsley
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*/
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#ifndef __ARCH_ARM_MACH_OMAP2_VP_H
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#define __ARCH_ARM_MACH_OMAP2_VP_H
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#include <linux/kernel.h>
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struct voltagedomain;
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/*
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* Voltage Processor (VP) identifiers
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*/
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#define OMAP3_VP_VDD_MPU_ID 0
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#define OMAP3_VP_VDD_CORE_ID 1
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#define OMAP4_VP_VDD_CORE_ID 0
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#define OMAP4_VP_VDD_IVA_ID 1
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#define OMAP4_VP_VDD_MPU_ID 2
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/* XXX document */
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#define VP_IDLE_TIMEOUT 200
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#define VP_TRANXDONE_TIMEOUT 300
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/**
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* struct omap_vp_ops - per-VP operations
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* @check_txdone: check for VP transaction done
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* @clear_txdone: clear VP transaction done status
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*/
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struct omap_vp_ops {
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u32 (*check_txdone)(u8 vp_id);
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void (*clear_txdone)(u8 vp_id);
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};
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/**
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* struct omap_vp_common - register data common to all VDDs
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* @vpconfig_erroroffset_mask: ERROROFFSET bitmask in the PRM_VP*_CONFIG reg
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* @vpconfig_errorgain_mask: ERRORGAIN bitmask in the PRM_VP*_CONFIG reg
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* @vpconfig_initvoltage_mask: INITVOLTAGE bitmask in the PRM_VP*_CONFIG reg
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* @vpconfig_timeouten: TIMEOUT bitmask in the PRM_VP*_CONFIG reg
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* @vpconfig_initvdd: INITVDD bitmask in the PRM_VP*_CONFIG reg
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* @vpconfig_forceupdate: FORCEUPDATE bitmask in the PRM_VP*_CONFIG reg
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* @vpconfig_vpenable: VPENABLE bitmask in the PRM_VP*_CONFIG reg
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* @vpconfig_erroroffset_shift: ERROROFFSET field shift in PRM_VP*_CONFIG reg
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* @vpconfig_errorgain_shift: ERRORGAIN field shift in PRM_VP*_CONFIG reg
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* @vpconfig_initvoltage_shift: INITVOLTAGE field shift in PRM_VP*_CONFIG reg
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* @vstepmin_stepmin_shift: VSTEPMIN field shift in the PRM_VP*_VSTEPMIN reg
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* @vstepmin_smpswaittimemin_shift: SMPSWAITTIMEMIN field shift in PRM_VP*_VSTEPMIN reg
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* @vstepmax_stepmax_shift: VSTEPMAX field shift in the PRM_VP*_VSTEPMAX reg
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* @vstepmax_smpswaittimemax_shift: SMPSWAITTIMEMAX field shift in PRM_VP*_VSTEPMAX reg
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* @vlimitto_vddmin_shift: VDDMIN field shift in PRM_VP*_VLIMITTO reg
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* @vlimitto_vddmax_shift: VDDMAX field shift in PRM_VP*_VLIMITTO reg
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* @vlimitto_timeout_shift: TIMEOUT field shift in PRM_VP*_VLIMITTO reg
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* @vpvoltage_mask: VPVOLTAGE field mask in PRM_VP*_VOLTAGE reg
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*/
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struct omap_vp_common {
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u32 vpconfig_erroroffset_mask;
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u32 vpconfig_errorgain_mask;
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u32 vpconfig_initvoltage_mask;
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u8 vpconfig_timeouten;
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u8 vpconfig_initvdd;
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u8 vpconfig_forceupdate;
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u8 vpconfig_vpenable;
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u8 vstepmin_stepmin_shift;
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u8 vstepmin_smpswaittimemin_shift;
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u8 vstepmax_stepmax_shift;
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u8 vstepmax_smpswaittimemax_shift;
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u8 vlimitto_vddmin_shift;
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u8 vlimitto_vddmax_shift;
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u8 vlimitto_timeout_shift;
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u8 vpvoltage_mask;
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const struct omap_vp_ops *ops;
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};
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/**
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* struct omap_vp_instance - VP register offsets (per-VDD)
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* @common: pointer to struct omap_vp_common * for this SoC
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* @vpconfig: PRM_VP*_CONFIG reg offset from PRM start
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* @vstepmin: PRM_VP*_VSTEPMIN reg offset from PRM start
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* @vlimitto: PRM_VP*_VLIMITTO reg offset from PRM start
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* @vstatus: PRM_VP*_VSTATUS reg offset from PRM start
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* @voltage: PRM_VP*_VOLTAGE reg offset from PRM start
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* @id: Unique identifier for VP instance.
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* @enabled: flag to keep track of whether vp is enabled or not
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*
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* XXX vp_common is probably not needed since it is per-SoC
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*/
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struct omap_vp_instance {
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const struct omap_vp_common *common;
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u8 vpconfig;
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u8 vstepmin;
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u8 vstepmax;
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u8 vlimitto;
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u8 vstatus;
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u8 voltage;
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u8 id;
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bool enabled;
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};
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extern struct omap_vp_instance omap3_vp_mpu;
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extern struct omap_vp_instance omap3_vp_core;
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extern struct omap_vp_instance omap4_vp_mpu;
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extern struct omap_vp_instance omap4_vp_iva;
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extern struct omap_vp_instance omap4_vp_core;
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void omap_vp_init(struct voltagedomain *voltdm);
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void omap_vp_enable(struct voltagedomain *voltdm);
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void omap_vp_disable(struct voltagedomain *voltdm);
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int omap_vp_forceupdate_scale(struct voltagedomain *voltdm,
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unsigned long target_volt);
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int omap_vp_update_errorgain(struct voltagedomain *voltdm,
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unsigned long target_volt);
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#endif
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