forked from luck/tmp_suning_uos_patched
ARM: OMAP2: Clockdomain: Add base OMAP2/3 clockdomain code
This patch creates an interface to the clockdomain registers in the PRM/CM modules on OMAP2/3. This interface is intended to be used by PM code, e.g., pm.c; not by device drivers directly. The patch also adds clockdomain usecount tracking. This is intended to be called whenever the first clock in a clockdomain is enabled, or when the last enabled clock in a clockdomain is disabled. If the clockdomain is in software-supervised mode, the code will force-wakeup or force-sleep the clockdomain. If the clockdomain is in hardware-supervised mode, the first clock enable will add sleep and wakeup dependencies on a user-selectable set of parent domains (usually MPU & IVA2), and the disable will remove them. Each clockdomain will be defined in later patches as static structures. The clockdomain structures are linked into a list at boot by clkdm_register(), similar to the OMAP clock code. The patch adds a Kconfig option, CONFIG_OMAP_DEBUG_CLOCKDOMAIN, which when enabled will emit verbose debug messages via pr_debug(). Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Paul Walmsley
Tony Lindgren
parent
ecb24aa129
commit
d459bfe01f
@ -4,7 +4,8 @@
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# Common support
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obj-y := irq.o id.o io.o memory.o control.o prcm.o clock.o mux.o \
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devices.o serial.o gpmc.o timer-gp.o powerdomain.o
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devices.o serial.o gpmc.o timer-gp.o powerdomain.o \
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clockdomain.o
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obj-$(CONFIG_OMAP_MCBSP) += mcbsp.o
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603
arch/arm/mach-omap2/clockdomain.c
Normal file
603
arch/arm/mach-omap2/clockdomain.c
Normal file
@ -0,0 +1,603 @@
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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 Nokia Corporation
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*
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* Written by Paul Walmsley and Jouni Högander
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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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#ifdef CONFIG_OMAP_DEBUG_CLOCKDOMAIN
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# define DEBUG
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#endif
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/list.h>
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#include <linux/errno.h>
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#include <linux/delay.h>
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#include <linux/clk.h>
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#include <linux/limits.h>
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#include <linux/io.h>
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#include <linux/bitops.h>
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#include <mach/clock.h>
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#include "prm.h"
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#include "prm-regbits-24xx.h"
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#include "cm.h"
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#include <mach/powerdomain.h>
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#include <mach/clockdomain.h>
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/* clkdm_list contains all registered struct clockdomains */
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static LIST_HEAD(clkdm_list);
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/* clkdm_mutex protects clkdm_list add and del ops */
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static DEFINE_MUTEX(clkdm_mutex);
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/* array of powerdomain deps to be added/removed when clkdm in hwsup mode */
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static struct clkdm_pwrdm_autodep *autodeps;
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/* Private functions */
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/*
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* _autodep_lookup - resolve autodep pwrdm names to pwrdm pointers; store
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* @autodep: struct clkdm_pwrdm_autodep * to resolve
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*
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* Resolve autodep powerdomain names to powerdomain pointers via
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* pwrdm_lookup() and store the pointers in the autodep structure. An
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* "autodep" is a powerdomain sleep/wakeup dependency that is
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* automatically added and removed whenever clocks in the associated
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* clockdomain are enabled or disabled (respectively) when the
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* clockdomain is in hardware-supervised mode. Meant to be called
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* once at clockdomain layer initialization, since these should remain
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* fixed for a particular architecture. No return value.
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*/
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static void _autodep_lookup(struct clkdm_pwrdm_autodep *autodep)
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{
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struct powerdomain *pwrdm;
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if (!autodep)
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return;
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if (!omap_chip_is(autodep->omap_chip))
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return;
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pwrdm = pwrdm_lookup(autodep->pwrdm_name);
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if (!pwrdm) {
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pr_debug("clockdomain: _autodep_lookup: powerdomain %s "
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"does not exist\n", autodep->pwrdm_name);
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WARN_ON(1);
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return;
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}
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autodep->pwrdm = pwrdm;
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return;
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}
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/*
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* _clkdm_add_autodeps - add auto sleepdeps/wkdeps to clkdm upon clock enable
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* @clkdm: struct clockdomain *
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*
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* Add the "autodep" sleep & wakeup dependencies to clockdomain 'clkdm'
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* in hardware-supervised mode. Meant to be called from clock framework
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* when a clock inside clockdomain 'clkdm' is enabled. No return value.
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*/
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static void _clkdm_add_autodeps(struct clockdomain *clkdm)
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{
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struct clkdm_pwrdm_autodep *autodep;
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for (autodep = autodeps; autodep->pwrdm_name; autodep++) {
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if (!autodep->pwrdm)
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continue;
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pr_debug("clockdomain: adding %s sleepdep/wkdep for "
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"pwrdm %s\n", autodep->pwrdm_name,
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clkdm->pwrdm->name);
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pwrdm_add_sleepdep(clkdm->pwrdm, autodep->pwrdm);
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pwrdm_add_wkdep(clkdm->pwrdm, autodep->pwrdm);
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}
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}
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/*
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* _clkdm_add_autodeps - remove auto sleepdeps/wkdeps from clkdm
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* @clkdm: struct clockdomain *
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*
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* Remove the "autodep" sleep & wakeup dependencies from clockdomain 'clkdm'
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* in hardware-supervised mode. Meant to be called from clock framework
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* when a clock inside clockdomain 'clkdm' is disabled. No return value.
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*/
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static void _clkdm_del_autodeps(struct clockdomain *clkdm)
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{
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struct clkdm_pwrdm_autodep *autodep;
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for (autodep = autodeps; autodep->pwrdm_name; autodep++) {
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if (!autodep->pwrdm)
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continue;
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pr_debug("clockdomain: removing %s sleepdep/wkdep for "
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"pwrdm %s\n", autodep->pwrdm_name,
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clkdm->pwrdm->name);
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pwrdm_del_sleepdep(clkdm->pwrdm, autodep->pwrdm);
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pwrdm_del_wkdep(clkdm->pwrdm, autodep->pwrdm);
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}
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}
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static struct clockdomain *_clkdm_lookup(const char *name)
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{
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struct clockdomain *clkdm, *temp_clkdm;
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if (!name)
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return NULL;
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clkdm = NULL;
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list_for_each_entry(temp_clkdm, &clkdm_list, node) {
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if (!strcmp(name, temp_clkdm->name)) {
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clkdm = temp_clkdm;
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break;
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}
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}
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return clkdm;
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}
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/* Public functions */
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/**
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* clkdm_init - set up the clockdomain layer
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* @clkdms: optional pointer to an array of clockdomains to register
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* @init_autodeps: optional pointer to an array of autodeps to register
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*
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* Set up internal state. If a pointer to an array of clockdomains
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* was supplied, loop through the list of clockdomains, register all
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* that are available on the current platform. Similarly, if a
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* pointer to an array of clockdomain-powerdomain autodependencies was
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* provided, register those. No return value.
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*/
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void clkdm_init(struct clockdomain **clkdms,
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struct clkdm_pwrdm_autodep *init_autodeps)
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{
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struct clockdomain **c = NULL;
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struct clkdm_pwrdm_autodep *autodep = NULL;
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if (clkdms)
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for (c = clkdms; *c; c++)
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clkdm_register(*c);
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autodeps = init_autodeps;
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if (autodeps)
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for (autodep = autodeps; autodep->pwrdm_name; autodep++)
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_autodep_lookup(autodep);
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}
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/**
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* clkdm_register - register a clockdomain
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* @clkdm: struct clockdomain * to register
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*
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* Adds a clockdomain to the internal clockdomain list.
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* Returns -EINVAL if given a null pointer, -EEXIST if a clockdomain is
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* already registered by the provided name, or 0 upon success.
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*/
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int clkdm_register(struct clockdomain *clkdm)
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{
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int ret = -EINVAL;
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struct powerdomain *pwrdm;
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if (!clkdm || !clkdm->name)
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return -EINVAL;
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if (!omap_chip_is(clkdm->omap_chip))
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return -EINVAL;
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pwrdm = pwrdm_lookup(clkdm->pwrdm_name);
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if (!pwrdm) {
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pr_debug("clockdomain: clkdm_register %s: powerdomain %s "
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"does not exist\n", clkdm->name, clkdm->pwrdm_name);
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return -EINVAL;
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}
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clkdm->pwrdm = pwrdm;
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mutex_lock(&clkdm_mutex);
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/* Verify that the clockdomain is not already registered */
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if (_clkdm_lookup(clkdm->name)) {
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ret = -EEXIST;
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goto cr_unlock;
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};
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list_add(&clkdm->node, &clkdm_list);
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pr_debug("clockdomain: registered %s\n", clkdm->name);
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ret = 0;
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cr_unlock:
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mutex_unlock(&clkdm_mutex);
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return ret;
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}
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/**
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* clkdm_unregister - unregister a clockdomain
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* @clkdm: struct clockdomain * to unregister
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*
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* Removes a clockdomain from the internal clockdomain list. Returns
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* -EINVAL if clkdm argument is NULL.
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*/
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int clkdm_unregister(struct clockdomain *clkdm)
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{
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if (!clkdm)
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return -EINVAL;
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mutex_lock(&clkdm_mutex);
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list_del(&clkdm->node);
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mutex_unlock(&clkdm_mutex);
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pr_debug("clockdomain: unregistered %s\n", clkdm->name);
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return 0;
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}
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/**
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* clkdm_lookup - look up a clockdomain by name, return a pointer
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* @name: name of clockdomain
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*
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* Find a registered clockdomain by its name. Returns a pointer to the
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* struct clockdomain if found, or NULL otherwise.
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*/
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struct clockdomain *clkdm_lookup(const char *name)
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{
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struct clockdomain *clkdm, *temp_clkdm;
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if (!name)
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return NULL;
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clkdm = NULL;
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mutex_lock(&clkdm_mutex);
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list_for_each_entry(temp_clkdm, &clkdm_list, node) {
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if (!strcmp(name, temp_clkdm->name)) {
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clkdm = temp_clkdm;
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break;
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}
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}
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mutex_unlock(&clkdm_mutex);
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return clkdm;
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}
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/**
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* clkdm_for_each - call function on each registered clockdomain
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* @fn: callback function *
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*
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* Call the supplied function for each registered clockdomain.
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* The callback function can return anything but 0 to bail
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* out early from the iterator. The callback function is called with
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* the clkdm_mutex held, so no clockdomain structure manipulation
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* functions should be called from the callback, although hardware
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* clockdomain control functions are fine. Returns the last return
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* value of the callback function, which should be 0 for success or
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* anything else to indicate failure; or -EINVAL if the function pointer
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* is null.
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*/
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int clkdm_for_each(int (*fn)(struct clockdomain *clkdm))
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{
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struct clockdomain *clkdm;
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int ret = 0;
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if (!fn)
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return -EINVAL;
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mutex_lock(&clkdm_mutex);
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list_for_each_entry(clkdm, &clkdm_list, node) {
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ret = (*fn)(clkdm);
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if (ret)
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break;
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}
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mutex_unlock(&clkdm_mutex);
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return ret;
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}
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/* Hardware clockdomain control */
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/**
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* omap2_clkdm_clktrctrl_read - read the clkdm's current state transition mode
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* @clk: struct clk * of a clockdomain
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*
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* Return the clockdomain's current state transition mode from the
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* corresponding domain CM_CLKSTCTRL register. Returns -EINVAL if clk
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* is NULL or the current mode upon success.
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*/
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static int omap2_clkdm_clktrctrl_read(struct clockdomain *clkdm)
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{
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u32 v;
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if (!clkdm)
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return -EINVAL;
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v = cm_read_mod_reg(clkdm->pwrdm->prcm_offs, CM_CLKSTCTRL);
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v &= clkdm->clktrctrl_mask;
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v >>= __ffs(clkdm->clktrctrl_mask);
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return v;
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}
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/**
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* omap2_clkdm_sleep - force clockdomain sleep transition
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* @clkdm: struct clockdomain *
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*
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* Instruct the CM to force a sleep transition on the specified
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* clockdomain 'clkdm'. Returns -EINVAL if clk is NULL or if
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* clockdomain does not support software-initiated sleep; 0 upon
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* success.
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*/
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int omap2_clkdm_sleep(struct clockdomain *clkdm)
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{
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if (!clkdm)
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return -EINVAL;
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if (!(clkdm->flags & CLKDM_CAN_FORCE_SLEEP)) {
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pr_debug("clockdomain: %s does not support forcing "
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"sleep via software\n", clkdm->name);
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return -EINVAL;
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}
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pr_debug("clockdomain: forcing sleep on %s\n", clkdm->name);
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if (cpu_is_omap24xx()) {
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cm_set_mod_reg_bits(OMAP24XX_FORCESTATE,
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clkdm->pwrdm->prcm_offs, PM_PWSTCTRL);
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} else if (cpu_is_omap34xx()) {
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u32 v = (OMAP34XX_CLKSTCTRL_FORCE_SLEEP <<
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__ffs(clkdm->clktrctrl_mask));
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cm_rmw_mod_reg_bits(clkdm->clktrctrl_mask, v,
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clkdm->pwrdm->prcm_offs, CM_CLKSTCTRL);
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} else {
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BUG();
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};
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return 0;
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}
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/**
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* omap2_clkdm_wakeup - force clockdomain wakeup transition
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* @clkdm: struct clockdomain *
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*
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* Instruct the CM to force a wakeup transition on the specified
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* clockdomain 'clkdm'. Returns -EINVAL if clkdm is NULL or if the
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* clockdomain does not support software-controlled wakeup; 0 upon
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* success.
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*/
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int omap2_clkdm_wakeup(struct clockdomain *clkdm)
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{
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if (!clkdm)
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return -EINVAL;
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if (!(clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)) {
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pr_debug("clockdomain: %s does not support forcing "
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"wakeup via software\n", clkdm->name);
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return -EINVAL;
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}
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pr_debug("clockdomain: forcing wakeup on %s\n", clkdm->name);
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if (cpu_is_omap24xx()) {
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cm_clear_mod_reg_bits(OMAP24XX_FORCESTATE,
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clkdm->pwrdm->prcm_offs, PM_PWSTCTRL);
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} else if (cpu_is_omap34xx()) {
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u32 v = (OMAP34XX_CLKSTCTRL_FORCE_WAKEUP <<
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__ffs(clkdm->clktrctrl_mask));
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cm_rmw_mod_reg_bits(clkdm->clktrctrl_mask, v,
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clkdm->pwrdm->prcm_offs, CM_CLKSTCTRL);
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} else {
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BUG();
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};
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return 0;
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}
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/**
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* omap2_clkdm_allow_idle - enable hwsup idle transitions for clkdm
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* @clkdm: struct clockdomain *
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*
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* Allow the hardware to automatically switch the clockdomain into
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* active or idle states, as needed by downstream clocks. If the
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* clockdomain has any downstream clocks enabled in the clock
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* framework, wkdep/sleepdep autodependencies are added; this is so
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* device drivers can read and write to the device. No return value.
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*/
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void omap2_clkdm_allow_idle(struct clockdomain *clkdm)
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{
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u32 v;
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if (!clkdm)
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return;
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if (!(clkdm->flags & CLKDM_CAN_ENABLE_AUTO)) {
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pr_debug("clock: automatic idle transitions cannot be enabled "
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"on clockdomain %s\n", clkdm->name);
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return;
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}
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pr_debug("clockdomain: enabling automatic idle transitions for %s\n",
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clkdm->name);
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if (atomic_read(&clkdm->usecount) > 0)
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_clkdm_add_autodeps(clkdm);
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if (cpu_is_omap24xx())
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v = OMAP24XX_CLKSTCTRL_ENABLE_AUTO;
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else if (cpu_is_omap34xx())
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v = OMAP34XX_CLKSTCTRL_ENABLE_AUTO;
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else
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BUG();
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cm_rmw_mod_reg_bits(clkdm->clktrctrl_mask,
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v << __ffs(clkdm->clktrctrl_mask),
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clkdm->pwrdm->prcm_offs,
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CM_CLKSTCTRL);
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}
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/**
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* omap2_clkdm_deny_idle - disable hwsup idle transitions for clkdm
|
||||
* @clkdm: struct clockdomain *
|
||||
*
|
||||
* Prevent the hardware from automatically switching the clockdomain
|
||||
* into inactive or idle states. If the clockdomain has downstream
|
||||
* clocks enabled in the clock framework, wkdep/sleepdep
|
||||
* autodependencies are removed. No return value.
|
||||
*/
|
||||
void omap2_clkdm_deny_idle(struct clockdomain *clkdm)
|
||||
{
|
||||
u32 v;
|
||||
|
||||
if (!clkdm)
|
||||
return;
|
||||
|
||||
if (!(clkdm->flags & CLKDM_CAN_DISABLE_AUTO)) {
|
||||
pr_debug("clockdomain: automatic idle transitions cannot be "
|
||||
"disabled on %s\n", clkdm->name);
|
||||
return;
|
||||
}
|
||||
|
||||
pr_debug("clockdomain: disabling automatic idle transitions for %s\n",
|
||||
clkdm->name);
|
||||
|
||||
if (cpu_is_omap24xx())
|
||||
v = OMAP24XX_CLKSTCTRL_DISABLE_AUTO;
|
||||
else if (cpu_is_omap34xx())
|
||||
v = OMAP34XX_CLKSTCTRL_DISABLE_AUTO;
|
||||
else
|
||||
BUG();
|
||||
|
||||
cm_rmw_mod_reg_bits(clkdm->clktrctrl_mask,
|
||||
v << __ffs(clkdm->clktrctrl_mask),
|
||||
clkdm->pwrdm->prcm_offs, CM_CLKSTCTRL);
|
||||
|
||||
if (atomic_read(&clkdm->usecount) > 0)
|
||||
_clkdm_del_autodeps(clkdm);
|
||||
}
|
||||
|
||||
|
||||
/* Clockdomain-to-clock framework interface code */
|
||||
|
||||
/**
|
||||
* omap2_clkdm_clk_enable - add an enabled downstream clock to this clkdm
|
||||
* @clkdm: struct clockdomain *
|
||||
* @clk: struct clk * of the enabled downstream clock
|
||||
*
|
||||
* Increment the usecount of this clockdomain 'clkdm' and ensure that
|
||||
* it is awake. Intended to be called by clk_enable() code. If the
|
||||
* clockdomain is in software-supervised idle mode, force the
|
||||
* clockdomain to wake. If the clockdomain is in hardware-supervised
|
||||
* idle mode, add clkdm-pwrdm autodependencies, to ensure that devices
|
||||
* in the clockdomain can be read from/written to by on-chip processors.
|
||||
* Returns -EINVAL if passed null pointers; returns 0 upon success or
|
||||
* if the clockdomain is in hwsup idle mode.
|
||||
*/
|
||||
int omap2_clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk)
|
||||
{
|
||||
int v;
|
||||
|
||||
/*
|
||||
* XXX Rewrite this code to maintain a list of enabled
|
||||
* downstream clocks for debugging purposes?
|
||||
*/
|
||||
|
||||
if (!clkdm || !clk)
|
||||
return -EINVAL;
|
||||
|
||||
if (atomic_inc_return(&clkdm->usecount) > 1)
|
||||
return 0;
|
||||
|
||||
/* Clockdomain now has one enabled downstream clock */
|
||||
|
||||
pr_debug("clockdomain: clkdm %s: clk %s now enabled\n", clkdm->name,
|
||||
clk->name);
|
||||
|
||||
v = omap2_clkdm_clktrctrl_read(clkdm);
|
||||
|
||||
if ((cpu_is_omap34xx() && v == OMAP34XX_CLKSTCTRL_ENABLE_AUTO) ||
|
||||
(cpu_is_omap24xx() && v == OMAP24XX_CLKSTCTRL_ENABLE_AUTO))
|
||||
_clkdm_add_autodeps(clkdm);
|
||||
else
|
||||
omap2_clkdm_wakeup(clkdm);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* omap2_clkdm_clk_disable - remove an enabled downstream clock from this clkdm
|
||||
* @clkdm: struct clockdomain *
|
||||
* @clk: struct clk * of the disabled downstream clock
|
||||
*
|
||||
* Decrement the usecount of this clockdomain 'clkdm'. Intended to be
|
||||
* called by clk_disable() code. If the usecount goes to 0, put the
|
||||
* clockdomain to sleep (software-supervised mode) or remove the
|
||||
* clkdm-pwrdm autodependencies (hardware-supervised mode). Returns
|
||||
* -EINVAL if passed null pointers; -ERANGE if the clkdm usecount
|
||||
* underflows and debugging is enabled; or returns 0 upon success or
|
||||
* if the clockdomain is in hwsup idle mode.
|
||||
*/
|
||||
int omap2_clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk)
|
||||
{
|
||||
int v;
|
||||
|
||||
/*
|
||||
* XXX Rewrite this code to maintain a list of enabled
|
||||
* downstream clocks for debugging purposes?
|
||||
*/
|
||||
|
||||
if (!clkdm || !clk)
|
||||
return -EINVAL;
|
||||
|
||||
#ifdef DEBUG
|
||||
if (atomic_read(&clkdm->usecount) == 0) {
|
||||
WARN_ON(1); /* underflow */
|
||||
return -ERANGE;
|
||||
}
|
||||
#endif
|
||||
|
||||
if (atomic_dec_return(&clkdm->usecount) > 0)
|
||||
return 0;
|
||||
|
||||
/* All downstream clocks of this clockdomain are now disabled */
|
||||
|
||||
pr_debug("clockdomain: clkdm %s: clk %s now disabled\n", clkdm->name,
|
||||
clk->name);
|
||||
|
||||
v = omap2_clkdm_clktrctrl_read(clkdm);
|
||||
|
||||
if ((cpu_is_omap34xx() && v == OMAP34XX_CLKSTCTRL_ENABLE_AUTO) ||
|
||||
(cpu_is_omap24xx() && v == OMAP24XX_CLKSTCTRL_ENABLE_AUTO))
|
||||
_clkdm_del_autodeps(clkdm);
|
||||
else
|
||||
omap2_clkdm_sleep(clkdm);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -41,6 +41,18 @@ config OMAP_DEBUG_POWERDOMAIN
|
||||
for every powerdomain register write. However, the
|
||||
extra detail costs some memory.
|
||||
|
||||
config OMAP_DEBUG_CLOCKDOMAIN
|
||||
bool "Emit debug messages from clockdomain layer"
|
||||
depends on ARCH_OMAP2 || ARCH_OMAP3
|
||||
default n
|
||||
help
|
||||
Say Y here if you want to compile in clockdomain layer
|
||||
debugging messages for OMAP2/3. These messages can
|
||||
provide more detail as to why some clockdomain calls
|
||||
may be failing, and will also emit a descriptive message
|
||||
for every clockdomain register write. However, the
|
||||
extra detail costs some memory.
|
||||
|
||||
config OMAP_RESET_CLOCKS
|
||||
bool "Reset unused clocks during boot"
|
||||
depends on ARCH_OMAP
|
||||
|
||||
106
arch/arm/plat-omap/include/mach/clockdomain.h
Normal file
106
arch/arm/plat-omap/include/mach/clockdomain.h
Normal file
@ -0,0 +1,106 @@
|
||||
/*
|
||||
* linux/include/asm-arm/arch-omap/clockdomain.h
|
||||
*
|
||||
* OMAP2/3 clockdomain framework functions
|
||||
*
|
||||
* Copyright (C) 2008 Texas Instruments, Inc.
|
||||
* Copyright (C) 2008 Nokia Corporation
|
||||
*
|
||||
* Written by Paul Walmsley
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#ifndef __ASM_ARM_ARCH_OMAP_CLOCKDOMAIN_H
|
||||
#define __ASM_ARM_ARCH_OMAP_CLOCKDOMAIN_H
|
||||
|
||||
#include <mach/powerdomain.h>
|
||||
#include <mach/clock.h>
|
||||
#include <mach/cpu.h>
|
||||
|
||||
/* Clockdomain capability flags */
|
||||
#define CLKDM_CAN_FORCE_SLEEP (1 << 0)
|
||||
#define CLKDM_CAN_FORCE_WAKEUP (1 << 1)
|
||||
#define CLKDM_CAN_ENABLE_AUTO (1 << 2)
|
||||
#define CLKDM_CAN_DISABLE_AUTO (1 << 3)
|
||||
|
||||
#define CLKDM_CAN_HWSUP (CLKDM_CAN_ENABLE_AUTO | CLKDM_CAN_DISABLE_AUTO)
|
||||
#define CLKDM_CAN_SWSUP (CLKDM_CAN_FORCE_SLEEP | CLKDM_CAN_FORCE_WAKEUP)
|
||||
#define CLKDM_CAN_HWSUP_SWSUP (CLKDM_CAN_SWSUP | CLKDM_CAN_HWSUP)
|
||||
|
||||
/* OMAP24XX CM_CLKSTCTRL_*.AUTOSTATE_* register bit values */
|
||||
#define OMAP24XX_CLKSTCTRL_DISABLE_AUTO 0x0
|
||||
#define OMAP24XX_CLKSTCTRL_ENABLE_AUTO 0x1
|
||||
|
||||
/* OMAP3XXX CM_CLKSTCTRL_*.CLKTRCTRL_* register bit values */
|
||||
#define OMAP34XX_CLKSTCTRL_DISABLE_AUTO 0x0
|
||||
#define OMAP34XX_CLKSTCTRL_FORCE_SLEEP 0x1
|
||||
#define OMAP34XX_CLKSTCTRL_FORCE_WAKEUP 0x2
|
||||
#define OMAP34XX_CLKSTCTRL_ENABLE_AUTO 0x3
|
||||
|
||||
/*
|
||||
* struct clkdm_pwrdm_autodep - a powerdomain that should have wkdeps
|
||||
* and sleepdeps added when a powerdomain should stay active in hwsup mode;
|
||||
* and conversely, removed when the powerdomain should be allowed to go
|
||||
* inactive in hwsup mode.
|
||||
*/
|
||||
struct clkdm_pwrdm_autodep {
|
||||
|
||||
/* Name of the powerdomain to add a wkdep/sleepdep on */
|
||||
const char *pwrdm_name;
|
||||
|
||||
/* Powerdomain pointer (looked up at clkdm_init() time) */
|
||||
struct powerdomain *pwrdm;
|
||||
|
||||
/* OMAP chip types that this clockdomain dep is valid on */
|
||||
const struct omap_chip_id omap_chip;
|
||||
|
||||
};
|
||||
|
||||
struct clockdomain {
|
||||
|
||||
/* Clockdomain name */
|
||||
const char *name;
|
||||
|
||||
/* Powerdomain enclosing this clockdomain */
|
||||
const char *pwrdm_name;
|
||||
|
||||
/* CLKTRCTRL/AUTOSTATE field mask in CM_CLKSTCTRL reg */
|
||||
const u16 clktrctrl_mask;
|
||||
|
||||
/* Clockdomain capability flags */
|
||||
const u8 flags;
|
||||
|
||||
/* OMAP chip types that this clockdomain is valid on */
|
||||
const struct omap_chip_id omap_chip;
|
||||
|
||||
/* Usecount tracking */
|
||||
atomic_t usecount;
|
||||
|
||||
/* Powerdomain pointer assigned at clkdm_register() */
|
||||
struct powerdomain *pwrdm;
|
||||
|
||||
struct list_head node;
|
||||
|
||||
};
|
||||
|
||||
void clkdm_init(struct clockdomain **clkdms, struct clkdm_pwrdm_autodep *autodeps);
|
||||
int clkdm_register(struct clockdomain *clkdm);
|
||||
int clkdm_unregister(struct clockdomain *clkdm);
|
||||
struct clockdomain *clkdm_lookup(const char *name);
|
||||
|
||||
int clkdm_for_each(int (*fn)(struct clockdomain *clkdm));
|
||||
struct powerdomain *clkdm_get_pwrdm(struct clockdomain *clkdm);
|
||||
|
||||
void omap2_clkdm_allow_idle(struct clockdomain *clkdm);
|
||||
void omap2_clkdm_deny_idle(struct clockdomain *clkdm);
|
||||
|
||||
int omap2_clkdm_wakeup(struct clockdomain *clkdm);
|
||||
int omap2_clkdm_sleep(struct clockdomain *clkdm);
|
||||
|
||||
int omap2_clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk);
|
||||
int omap2_clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk);
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user