142 lines
4.9 KiB
C
142 lines
4.9 KiB
C
/*
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* arch/arm/plat-omap/include/mach/clockdomain.h
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*
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* OMAP2/3 clockdomain framework functions
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*
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* Copyright (C) 2008 Texas Instruments, Inc.
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* Copyright (C) 2008-2009 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 __ASM_ARM_ARCH_OMAP_CLOCKDOMAIN_H
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#define __ASM_ARM_ARCH_OMAP_CLOCKDOMAIN_H
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#include <plat/powerdomain.h>
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#include <plat/clock.h>
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#include <plat/cpu.h>
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/* Clockdomain capability flags */
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#define CLKDM_CAN_FORCE_SLEEP (1 << 0)
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#define CLKDM_CAN_FORCE_WAKEUP (1 << 1)
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#define CLKDM_CAN_ENABLE_AUTO (1 << 2)
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#define CLKDM_CAN_DISABLE_AUTO (1 << 3)
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#define CLKDM_CAN_HWSUP (CLKDM_CAN_ENABLE_AUTO | CLKDM_CAN_DISABLE_AUTO)
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#define CLKDM_CAN_SWSUP (CLKDM_CAN_FORCE_SLEEP | CLKDM_CAN_FORCE_WAKEUP)
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#define CLKDM_CAN_HWSUP_SWSUP (CLKDM_CAN_SWSUP | CLKDM_CAN_HWSUP)
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/* OMAP24XX CM_CLKSTCTRL_*.AUTOSTATE_* register bit values */
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#define OMAP24XX_CLKSTCTRL_DISABLE_AUTO 0x0
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#define OMAP24XX_CLKSTCTRL_ENABLE_AUTO 0x1
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/* OMAP3XXX CM_CLKSTCTRL_*.CLKTRCTRL_* register bit values */
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#define OMAP34XX_CLKSTCTRL_DISABLE_AUTO 0x0
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#define OMAP34XX_CLKSTCTRL_FORCE_SLEEP 0x1
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#define OMAP34XX_CLKSTCTRL_FORCE_WAKEUP 0x2
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#define OMAP34XX_CLKSTCTRL_ENABLE_AUTO 0x3
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/**
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* struct clkdm_autodep - clkdm deps to add when entering/exiting hwsup mode
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* @clkdm: clockdomain to add wkdep+sleepdep on - set name member only
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* @omap_chip: OMAP chip types that this autodep is valid on
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*
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* A clockdomain that should have wkdeps and sleepdeps added when a
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* clockdomain should stay active in hwsup mode; and conversely,
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* removed when the clockdomain should be allowed to go inactive in
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* hwsup mode.
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*
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* Autodeps are deprecated and should be removed after
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* omap_hwmod-based fine-grained module idle control is added.
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*/
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struct clkdm_autodep {
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union {
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const char *name;
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struct clockdomain *ptr;
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} clkdm;
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const struct omap_chip_id omap_chip;
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};
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/**
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* struct clkdm_dep - encode dependencies between clockdomains
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* @clkdm_name: clockdomain name
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* @clkdm: pointer to the struct clockdomain of @clkdm_name
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* @omap_chip: OMAP chip types that this dependency is valid on
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* @wkdep_usecount: Number of wakeup dependencies causing this clkdm to wake
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* @sleepdep_usecount: Number of sleep deps that could prevent clkdm from idle
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*
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* Statically defined. @clkdm is resolved from @clkdm_name at runtime and
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* should not be pre-initialized.
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*
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* XXX Should also include hardware (fixed) dependencies.
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*/
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struct clkdm_dep {
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const char *clkdm_name;
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struct clockdomain *clkdm;
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atomic_t wkdep_usecount;
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atomic_t sleepdep_usecount;
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const struct omap_chip_id omap_chip;
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};
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/**
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* struct clockdomain - OMAP clockdomain
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* @name: clockdomain name
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* @pwrdm: powerdomain containing this clockdomain
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* @clktrctrl_reg: CLKSTCTRL reg for the given clock domain
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* @clktrctrl_mask: CLKTRCTRL/AUTOSTATE field mask in CM_CLKSTCTRL reg
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* @flags: Clockdomain capability flags
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* @dep_bit: Bit shift of this clockdomain's PM_WKDEP/CM_SLEEPDEP bit
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* @wkdep_srcs: Clockdomains that can be told to wake this powerdomain up
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* @sleepdep_srcs: Clockdomains that can be told to keep this clkdm from inact
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* @omap_chip: OMAP chip types that this clockdomain is valid on
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* @usecount: Usecount tracking
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* @node: list_head to link all clockdomains together
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*/
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struct clockdomain {
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const char *name;
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union {
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const char *name;
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struct powerdomain *ptr;
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} pwrdm;
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void __iomem *clkstctrl_reg;
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const u16 clktrctrl_mask;
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const u8 flags;
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const u8 dep_bit;
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struct clkdm_dep *wkdep_srcs;
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struct clkdm_dep *sleepdep_srcs;
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const struct omap_chip_id omap_chip;
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atomic_t usecount;
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struct list_head node;
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};
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void clkdm_init(struct clockdomain **clkdms, struct clkdm_autodep *autodeps);
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struct clockdomain *clkdm_lookup(const char *name);
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int clkdm_for_each(int (*fn)(struct clockdomain *clkdm, void *user),
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void *user);
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struct powerdomain *clkdm_get_pwrdm(struct clockdomain *clkdm);
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int clkdm_add_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
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int clkdm_del_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
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int clkdm_read_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
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int clkdm_clear_all_wkdeps(struct clockdomain *clkdm);
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int clkdm_add_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
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int clkdm_del_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
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int clkdm_read_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
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int clkdm_clear_all_sleepdeps(struct clockdomain *clkdm);
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void omap2_clkdm_allow_idle(struct clockdomain *clkdm);
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void omap2_clkdm_deny_idle(struct clockdomain *clkdm);
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int omap2_clkdm_wakeup(struct clockdomain *clkdm);
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int omap2_clkdm_sleep(struct clockdomain *clkdm);
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int omap2_clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk);
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int omap2_clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk);
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#endif
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