2008-08-19 16:08:40 +08:00
|
|
|
/*
|
|
|
|
* OMAP powerdomain control
|
|
|
|
*
|
2011-09-15 06:01:21 +08:00
|
|
|
* Copyright (C) 2007-2008, 2011 Texas Instruments, Inc.
|
2011-03-08 10:28:15 +08:00
|
|
|
* Copyright (C) 2007-2011 Nokia Corporation
|
2008-08-19 16:08:40 +08:00
|
|
|
*
|
|
|
|
* Written by Paul Walmsley
|
2010-01-27 11:12:53 +08:00
|
|
|
* Added OMAP4 specific support by Abhijit Pagare <abhijitpagare@ti.com>
|
2010-05-19 10:24:05 +08:00
|
|
|
* State counting code by Tero Kristo <tero.kristo@nokia.com>
|
2010-01-27 11:12:53 +08:00
|
|
|
*
|
2008-08-19 16:08:40 +08:00
|
|
|
* 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.
|
|
|
|
*/
|
2009-12-09 07:33:10 +08:00
|
|
|
#undef DEBUG
|
2008-08-19 16:08:40 +08:00
|
|
|
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/types.h>
|
|
|
|
#include <linux/list.h>
|
|
|
|
#include <linux/errno.h>
|
2010-12-22 11:01:19 +08:00
|
|
|
#include <linux/string.h>
|
2013-01-26 15:58:16 +08:00
|
|
|
#include <linux/spinlock.h>
|
2011-03-03 18:25:43 +08:00
|
|
|
#include <trace/events/power.h>
|
|
|
|
|
2010-12-22 06:30:55 +08:00
|
|
|
#include "cm2xxx_3xxx.h"
|
2010-12-22 12:05:14 +08:00
|
|
|
#include "prcm44xx.h"
|
2010-12-22 06:30:55 +08:00
|
|
|
#include "cm44xx.h"
|
|
|
|
#include "prm2xxx_3xxx.h"
|
2010-12-22 06:30:54 +08:00
|
|
|
#include "prm44xx.h"
|
2008-08-19 16:08:40 +08:00
|
|
|
|
2011-03-03 18:25:43 +08:00
|
|
|
#include <asm/cpu.h>
|
2012-09-01 01:59:07 +08:00
|
|
|
|
2010-12-22 12:05:16 +08:00
|
|
|
#include "powerdomain.h"
|
2010-12-22 12:05:15 +08:00
|
|
|
#include "clockdomain.h"
|
2014-05-12 09:41:50 +08:00
|
|
|
#include "voltage.h"
|
2008-08-19 16:08:40 +08:00
|
|
|
|
2012-09-01 01:59:07 +08:00
|
|
|
#include "soc.h"
|
2008-10-15 23:13:49 +08:00
|
|
|
#include "pm.h"
|
|
|
|
|
2011-03-03 18:25:43 +08:00
|
|
|
#define PWRDM_TRACE_STATES_FLAG (1<<31)
|
|
|
|
|
2008-10-15 22:48:43 +08:00
|
|
|
enum {
|
|
|
|
PWRDM_STATE_NOW = 0,
|
|
|
|
PWRDM_STATE_PREV,
|
|
|
|
};
|
|
|
|
|
2013-01-30 04:45:09 +08:00
|
|
|
/*
|
|
|
|
* Types of sleep_switch used internally in omap_set_pwrdm_state()
|
|
|
|
* and its associated static functions
|
|
|
|
*
|
|
|
|
* XXX Better documentation is needed here
|
|
|
|
*/
|
|
|
|
#define ALREADYACTIVE_SWITCH 0
|
|
|
|
#define FORCEWAKEUP_SWITCH 1
|
|
|
|
#define LOWPOWERSTATE_SWITCH 2
|
2010-01-27 11:12:53 +08:00
|
|
|
|
2008-08-19 16:08:40 +08:00
|
|
|
/* pwrdm_list contains all registered struct powerdomains */
|
|
|
|
static LIST_HEAD(pwrdm_list);
|
|
|
|
|
2010-12-22 11:01:18 +08:00
|
|
|
static struct pwrdm_ops *arch_pwrdm;
|
|
|
|
|
2008-08-19 16:08:40 +08:00
|
|
|
/* Private functions */
|
|
|
|
|
|
|
|
static struct powerdomain *_pwrdm_lookup(const char *name)
|
|
|
|
{
|
|
|
|
struct powerdomain *pwrdm, *temp_pwrdm;
|
|
|
|
|
|
|
|
pwrdm = NULL;
|
|
|
|
|
|
|
|
list_for_each_entry(temp_pwrdm, &pwrdm_list, node) {
|
|
|
|
if (!strcmp(name, temp_pwrdm->name)) {
|
|
|
|
pwrdm = temp_pwrdm;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return pwrdm;
|
|
|
|
}
|
|
|
|
|
2010-01-27 11:13:00 +08:00
|
|
|
/**
|
|
|
|
* _pwrdm_register - register a powerdomain
|
|
|
|
* @pwrdm: struct powerdomain * to register
|
|
|
|
*
|
|
|
|
* Adds a powerdomain to the internal powerdomain list. Returns
|
|
|
|
* -EINVAL if given a null pointer, -EEXIST if a powerdomain is
|
|
|
|
* already registered by the provided name, or 0 upon success.
|
|
|
|
*/
|
|
|
|
static int _pwrdm_register(struct powerdomain *pwrdm)
|
|
|
|
{
|
|
|
|
int i;
|
2011-03-17 06:52:47 +08:00
|
|
|
struct voltagedomain *voltdm;
|
2010-01-27 11:13:00 +08:00
|
|
|
|
2010-12-22 12:05:14 +08:00
|
|
|
if (!pwrdm || !pwrdm->name)
|
2010-01-27 11:13:00 +08:00
|
|
|
return -EINVAL;
|
|
|
|
|
2010-12-22 12:05:14 +08:00
|
|
|
if (cpu_is_omap44xx() &&
|
|
|
|
pwrdm->prcm_partition == OMAP4430_INVALID_PRCM_PARTITION) {
|
|
|
|
pr_err("powerdomain: %s: missing OMAP4 PRCM partition ID\n",
|
|
|
|
pwrdm->name);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2010-01-27 11:13:00 +08:00
|
|
|
if (_pwrdm_lookup(pwrdm->name))
|
|
|
|
return -EEXIST;
|
|
|
|
|
2013-06-17 21:16:22 +08:00
|
|
|
if (arch_pwrdm && arch_pwrdm->pwrdm_has_voltdm)
|
|
|
|
if (!arch_pwrdm->pwrdm_has_voltdm())
|
|
|
|
goto skip_voltdm;
|
|
|
|
|
2011-03-17 06:52:47 +08:00
|
|
|
voltdm = voltdm_lookup(pwrdm->voltdm.name);
|
|
|
|
if (!voltdm) {
|
|
|
|
pr_err("powerdomain: %s: voltagedomain %s does not exist\n",
|
|
|
|
pwrdm->name, pwrdm->voltdm.name);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
pwrdm->voltdm.ptr = voltdm;
|
2011-03-17 07:13:15 +08:00
|
|
|
INIT_LIST_HEAD(&pwrdm->voltdm_node);
|
|
|
|
voltdm_add_pwrdm(voltdm, pwrdm);
|
2013-06-17 21:16:22 +08:00
|
|
|
skip_voltdm:
|
2013-01-26 15:58:16 +08:00
|
|
|
spin_lock_init(&pwrdm->_lock);
|
2011-03-17 06:52:47 +08:00
|
|
|
|
2010-01-27 11:13:00 +08:00
|
|
|
list_add(&pwrdm->node, &pwrdm_list);
|
|
|
|
|
|
|
|
/* Initialize the powerdomain's state counter */
|
2010-01-27 11:13:01 +08:00
|
|
|
for (i = 0; i < PWRDM_MAX_PWRSTS; i++)
|
2010-01-27 11:13:00 +08:00
|
|
|
pwrdm->state_counter[i] = 0;
|
|
|
|
|
2010-02-25 03:05:50 +08:00
|
|
|
pwrdm->ret_logic_off_counter = 0;
|
|
|
|
for (i = 0; i < pwrdm->banks; i++)
|
|
|
|
pwrdm->ret_mem_off_counter[i] = 0;
|
|
|
|
|
2013-12-03 03:38:14 +08:00
|
|
|
if (arch_pwrdm && arch_pwrdm->pwrdm_wait_transition)
|
|
|
|
arch_pwrdm->pwrdm_wait_transition(pwrdm);
|
2010-01-27 11:13:00 +08:00
|
|
|
pwrdm->state = pwrdm_read_pwrst(pwrdm);
|
|
|
|
pwrdm->state_counter[pwrdm->state] = 1;
|
|
|
|
|
|
|
|
pr_debug("powerdomain: registered %s\n", pwrdm->name);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-02-25 03:05:50 +08:00
|
|
|
static void _update_logic_membank_counters(struct powerdomain *pwrdm)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
u8 prev_logic_pwrst, prev_mem_pwrst;
|
|
|
|
|
|
|
|
prev_logic_pwrst = pwrdm_read_prev_logic_pwrst(pwrdm);
|
|
|
|
if ((pwrdm->pwrsts_logic_ret == PWRSTS_OFF_RET) &&
|
|
|
|
(prev_logic_pwrst == PWRDM_POWER_OFF))
|
|
|
|
pwrdm->ret_logic_off_counter++;
|
|
|
|
|
|
|
|
for (i = 0; i < pwrdm->banks; i++) {
|
|
|
|
prev_mem_pwrst = pwrdm_read_prev_mem_pwrst(pwrdm, i);
|
|
|
|
|
|
|
|
if ((pwrdm->pwrsts_mem_ret[i] == PWRSTS_OFF_RET) &&
|
|
|
|
(prev_mem_pwrst == PWRDM_POWER_OFF))
|
|
|
|
pwrdm->ret_mem_off_counter[i]++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-10-15 22:48:43 +08:00
|
|
|
static int _pwrdm_state_switch(struct powerdomain *pwrdm, int flag)
|
|
|
|
{
|
|
|
|
|
2013-01-26 15:58:13 +08:00
|
|
|
int prev, next, state, trace_state = 0;
|
2008-10-15 22:48:43 +08:00
|
|
|
|
|
|
|
if (pwrdm == NULL)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
state = pwrdm_read_pwrst(pwrdm);
|
|
|
|
|
|
|
|
switch (flag) {
|
|
|
|
case PWRDM_STATE_NOW:
|
|
|
|
prev = pwrdm->state;
|
|
|
|
break;
|
|
|
|
case PWRDM_STATE_PREV:
|
|
|
|
prev = pwrdm_read_prev_pwrst(pwrdm);
|
|
|
|
if (pwrdm->state != prev)
|
|
|
|
pwrdm->state_counter[prev]++;
|
2010-02-25 03:05:50 +08:00
|
|
|
if (prev == PWRDM_POWER_RET)
|
|
|
|
_update_logic_membank_counters(pwrdm);
|
2011-03-03 18:25:43 +08:00
|
|
|
/*
|
|
|
|
* If the power domain did not hit the desired state,
|
|
|
|
* generate a trace event with both the desired and hit states
|
|
|
|
*/
|
2013-01-26 15:58:13 +08:00
|
|
|
next = pwrdm_read_next_pwrst(pwrdm);
|
|
|
|
if (next != prev) {
|
2011-03-03 18:25:43 +08:00
|
|
|
trace_state = (PWRDM_TRACE_STATES_FLAG |
|
2013-01-26 15:58:13 +08:00
|
|
|
((next & OMAP_POWERSTATE_MASK) << 8) |
|
2011-03-03 18:25:43 +08:00
|
|
|
((prev & OMAP_POWERSTATE_MASK) << 0));
|
|
|
|
trace_power_domain_target(pwrdm->name, trace_state,
|
|
|
|
smp_processor_id());
|
|
|
|
}
|
2008-10-15 22:48:43 +08:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (state != prev)
|
|
|
|
pwrdm->state_counter[state]++;
|
|
|
|
|
2008-10-15 23:13:49 +08:00
|
|
|
pm_dbg_update_time(pwrdm, prev);
|
|
|
|
|
2008-10-15 22:48:43 +08:00
|
|
|
pwrdm->state = state;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-10-15 23:13:49 +08:00
|
|
|
static int _pwrdm_pre_transition_cb(struct powerdomain *pwrdm, void *unused)
|
2008-10-15 22:48:43 +08:00
|
|
|
{
|
|
|
|
pwrdm_clear_all_prev_pwrst(pwrdm);
|
|
|
|
_pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-10-15 23:13:49 +08:00
|
|
|
static int _pwrdm_post_transition_cb(struct powerdomain *pwrdm, void *unused)
|
2008-10-15 22:48:43 +08:00
|
|
|
{
|
|
|
|
_pwrdm_state_switch(pwrdm, PWRDM_STATE_PREV);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-01-30 04:45:09 +08:00
|
|
|
/**
|
|
|
|
* _pwrdm_save_clkdm_state_and_activate - prepare for power state change
|
|
|
|
* @pwrdm: struct powerdomain * to operate on
|
|
|
|
* @curr_pwrst: current power state of @pwrdm
|
|
|
|
* @pwrst: power state to switch to
|
|
|
|
* @hwsup: ptr to a bool to return whether the clkdm is hardware-supervised
|
|
|
|
*
|
|
|
|
* Determine whether the powerdomain needs to be turned on before
|
|
|
|
* attempting to switch power states. Called by
|
|
|
|
* omap_set_pwrdm_state(). NOTE that if the powerdomain contains
|
|
|
|
* multiple clockdomains, this code assumes that the first clockdomain
|
|
|
|
* supports software-supervised wakeup mode - potentially a problem.
|
|
|
|
* Returns the power state switch mode currently in use (see the
|
|
|
|
* "Types of sleep_switch" comment above).
|
|
|
|
*/
|
|
|
|
static u8 _pwrdm_save_clkdm_state_and_activate(struct powerdomain *pwrdm,
|
|
|
|
u8 curr_pwrst, u8 pwrst,
|
|
|
|
bool *hwsup)
|
|
|
|
{
|
|
|
|
u8 sleep_switch;
|
|
|
|
|
2013-04-01 10:22:22 +08:00
|
|
|
if (curr_pwrst < PWRDM_POWER_ON) {
|
2013-01-30 04:45:09 +08:00
|
|
|
if (curr_pwrst > pwrst &&
|
|
|
|
pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE &&
|
|
|
|
arch_pwrdm->pwrdm_set_lowpwrstchange) {
|
|
|
|
sleep_switch = LOWPOWERSTATE_SWITCH;
|
|
|
|
} else {
|
|
|
|
*hwsup = clkdm_in_hwsup(pwrdm->pwrdm_clkdms[0]);
|
2013-01-26 15:58:16 +08:00
|
|
|
clkdm_wakeup_nolock(pwrdm->pwrdm_clkdms[0]);
|
2013-01-30 04:45:09 +08:00
|
|
|
sleep_switch = FORCEWAKEUP_SWITCH;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
sleep_switch = ALREADYACTIVE_SWITCH;
|
|
|
|
}
|
|
|
|
|
|
|
|
return sleep_switch;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* _pwrdm_restore_clkdm_state - restore the clkdm hwsup state after pwrst change
|
|
|
|
* @pwrdm: struct powerdomain * to operate on
|
|
|
|
* @sleep_switch: return value from _pwrdm_save_clkdm_state_and_activate()
|
|
|
|
* @hwsup: should @pwrdm's first clockdomain be set to hardware-supervised mode?
|
|
|
|
*
|
|
|
|
* Restore the clockdomain state perturbed by
|
|
|
|
* _pwrdm_save_clkdm_state_and_activate(), and call the power state
|
|
|
|
* bookkeeping code. Called by omap_set_pwrdm_state(). NOTE that if
|
|
|
|
* the powerdomain contains multiple clockdomains, this assumes that
|
|
|
|
* the first associated clockdomain supports either
|
|
|
|
* hardware-supervised idle control in the register, or
|
|
|
|
* software-supervised sleep. No return value.
|
|
|
|
*/
|
|
|
|
static void _pwrdm_restore_clkdm_state(struct powerdomain *pwrdm,
|
|
|
|
u8 sleep_switch, bool hwsup)
|
|
|
|
{
|
|
|
|
switch (sleep_switch) {
|
|
|
|
case FORCEWAKEUP_SWITCH:
|
|
|
|
if (hwsup)
|
2013-01-26 15:58:16 +08:00
|
|
|
clkdm_allow_idle_nolock(pwrdm->pwrdm_clkdms[0]);
|
2013-01-30 04:45:09 +08:00
|
|
|
else
|
2013-01-26 15:58:16 +08:00
|
|
|
clkdm_sleep_nolock(pwrdm->pwrdm_clkdms[0]);
|
2013-01-30 04:45:09 +08:00
|
|
|
break;
|
|
|
|
case LOWPOWERSTATE_SWITCH:
|
|
|
|
if (pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE &&
|
|
|
|
arch_pwrdm->pwrdm_set_lowpwrstchange)
|
|
|
|
arch_pwrdm->pwrdm_set_lowpwrstchange(pwrdm);
|
2013-01-26 15:58:16 +08:00
|
|
|
pwrdm_state_switch_nolock(pwrdm);
|
2013-01-30 04:45:09 +08:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-08-19 16:08:40 +08:00
|
|
|
/* Public functions */
|
|
|
|
|
|
|
|
/**
|
2011-09-15 06:01:21 +08:00
|
|
|
* pwrdm_register_platform_funcs - register powerdomain implementation fns
|
|
|
|
* @po: func pointers for arch specific implementations
|
2008-08-19 16:08:40 +08:00
|
|
|
*
|
2011-09-15 06:01:21 +08:00
|
|
|
* Register the list of function pointers used to implement the
|
|
|
|
* powerdomain functions on different OMAP SoCs. Should be called
|
|
|
|
* before any other pwrdm_register*() function. Returns -EINVAL if
|
|
|
|
* @po is null, -EEXIST if platform functions have already been
|
|
|
|
* registered, or 0 upon success.
|
2008-08-19 16:08:40 +08:00
|
|
|
*/
|
2011-09-15 06:01:21 +08:00
|
|
|
int pwrdm_register_platform_funcs(struct pwrdm_ops *po)
|
|
|
|
{
|
|
|
|
if (!po)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (arch_pwrdm)
|
|
|
|
return -EEXIST;
|
|
|
|
|
|
|
|
arch_pwrdm = po;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pwrdm_register_pwrdms - register SoC powerdomains
|
|
|
|
* @ps: pointer to an array of struct powerdomain to register
|
|
|
|
*
|
|
|
|
* Register the powerdomains available on a particular OMAP SoC. Must
|
|
|
|
* be called after pwrdm_register_platform_funcs(). May be called
|
|
|
|
* multiple times. Returns -EACCES if called before
|
|
|
|
* pwrdm_register_platform_funcs(); -EINVAL if the argument @ps is
|
|
|
|
* null; or 0 upon success.
|
|
|
|
*/
|
|
|
|
int pwrdm_register_pwrdms(struct powerdomain **ps)
|
2008-08-19 16:08:40 +08:00
|
|
|
{
|
|
|
|
struct powerdomain **p = NULL;
|
|
|
|
|
2011-09-15 06:01:21 +08:00
|
|
|
if (!arch_pwrdm)
|
|
|
|
return -EEXIST;
|
2010-12-22 11:01:18 +08:00
|
|
|
|
2011-09-15 06:01:21 +08:00
|
|
|
if (!ps)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
for (p = ps; *p; p++)
|
|
|
|
_pwrdm_register(*p);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pwrdm_complete_init - set up the powerdomain layer
|
|
|
|
*
|
|
|
|
* Do whatever is necessary to initialize registered powerdomains and
|
|
|
|
* powerdomain code. Currently, this programs the next power state
|
|
|
|
* for each powerdomain to ON. This prevents powerdomains from
|
|
|
|
* unexpectedly losing context or entering high wakeup latency modes
|
|
|
|
* with non-power-management-enabled kernels. Must be called after
|
|
|
|
* pwrdm_register_pwrdms(). Returns -EACCES if called before
|
|
|
|
* pwrdm_register_pwrdms(), or 0 upon success.
|
|
|
|
*/
|
|
|
|
int pwrdm_complete_init(void)
|
|
|
|
{
|
|
|
|
struct powerdomain *temp_p;
|
|
|
|
|
|
|
|
if (list_empty(&pwrdm_list))
|
|
|
|
return -EACCES;
|
2011-08-20 06:59:39 +08:00
|
|
|
|
|
|
|
list_for_each_entry(temp_p, &pwrdm_list, node)
|
|
|
|
pwrdm_set_next_pwrst(temp_p, PWRDM_POWER_ON);
|
2011-09-15 06:01:21 +08:00
|
|
|
|
|
|
|
return 0;
|
2008-08-19 16:08:40 +08:00
|
|
|
}
|
|
|
|
|
2013-01-26 15:58:16 +08:00
|
|
|
/**
|
|
|
|
* pwrdm_lock - acquire a Linux spinlock on a powerdomain
|
|
|
|
* @pwrdm: struct powerdomain * to lock
|
|
|
|
*
|
|
|
|
* Acquire the powerdomain spinlock on @pwrdm. No return value.
|
|
|
|
*/
|
|
|
|
void pwrdm_lock(struct powerdomain *pwrdm)
|
|
|
|
__acquires(&pwrdm->_lock)
|
|
|
|
{
|
|
|
|
spin_lock_irqsave(&pwrdm->_lock, pwrdm->_lock_flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pwrdm_unlock - release a Linux spinlock on a powerdomain
|
|
|
|
* @pwrdm: struct powerdomain * to unlock
|
|
|
|
*
|
|
|
|
* Release the powerdomain spinlock on @pwrdm. No return value.
|
|
|
|
*/
|
|
|
|
void pwrdm_unlock(struct powerdomain *pwrdm)
|
|
|
|
__releases(&pwrdm->_lock)
|
|
|
|
{
|
|
|
|
spin_unlock_irqrestore(&pwrdm->_lock, pwrdm->_lock_flags);
|
|
|
|
}
|
|
|
|
|
2008-08-19 16:08:40 +08:00
|
|
|
/**
|
|
|
|
* pwrdm_lookup - look up a powerdomain by name, return a pointer
|
|
|
|
* @name: name of powerdomain
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Find a registered powerdomain by its name @name. Returns a pointer
|
|
|
|
* to the struct powerdomain if found, or NULL otherwise.
|
2008-08-19 16:08:40 +08:00
|
|
|
*/
|
|
|
|
struct powerdomain *pwrdm_lookup(const char *name)
|
|
|
|
{
|
|
|
|
struct powerdomain *pwrdm;
|
|
|
|
|
|
|
|
if (!name)
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
pwrdm = _pwrdm_lookup(name);
|
|
|
|
|
|
|
|
return pwrdm;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
2010-01-27 11:13:00 +08:00
|
|
|
* pwrdm_for_each - call function on each registered clockdomain
|
2008-08-19 16:08:40 +08:00
|
|
|
* @fn: callback function *
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Call the supplied function @fn for each registered powerdomain.
|
|
|
|
* The callback function @fn can return anything but 0 to bail out
|
|
|
|
* early from the iterator. Returns the last return value of the
|
|
|
|
* callback function, which should be 0 for success or anything else
|
|
|
|
* to indicate failure; or -EINVAL if the function pointer is null.
|
2008-08-19 16:08:40 +08:00
|
|
|
*/
|
2010-01-27 11:13:00 +08:00
|
|
|
int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user),
|
|
|
|
void *user)
|
2008-08-19 16:08:40 +08:00
|
|
|
{
|
|
|
|
struct powerdomain *temp_pwrdm;
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
if (!fn)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
list_for_each_entry(temp_pwrdm, &pwrdm_list, node) {
|
2008-10-15 23:13:49 +08:00
|
|
|
ret = (*fn)(temp_pwrdm, user);
|
2008-08-19 16:08:40 +08:00
|
|
|
if (ret)
|
|
|
|
break;
|
|
|
|
}
|
2009-10-01 15:01:55 +08:00
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2008-08-19 16:08:44 +08:00
|
|
|
/**
|
|
|
|
* pwrdm_add_clkdm - add a clockdomain to a powerdomain
|
|
|
|
* @pwrdm: struct powerdomain * to add the clockdomain to
|
|
|
|
* @clkdm: struct clockdomain * to associate with a powerdomain
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Associate the clockdomain @clkdm with a powerdomain @pwrdm. This
|
2008-08-19 16:08:44 +08:00
|
|
|
* enables the use of pwrdm_for_each_clkdm(). Returns -EINVAL if
|
|
|
|
* presented with invalid pointers; -ENOMEM if memory could not be allocated;
|
|
|
|
* or 0 upon success.
|
|
|
|
*/
|
|
|
|
int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
int ret = -EINVAL;
|
|
|
|
|
|
|
|
if (!pwrdm || !clkdm)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2012-07-26 14:54:26 +08:00
|
|
|
pr_debug("powerdomain: %s: associating clockdomain %s\n",
|
|
|
|
pwrdm->name, clkdm->name);
|
2008-08-19 16:08:44 +08:00
|
|
|
|
|
|
|
for (i = 0; i < PWRDM_MAX_CLKDMS; i++) {
|
|
|
|
if (!pwrdm->pwrdm_clkdms[i])
|
|
|
|
break;
|
|
|
|
#ifdef DEBUG
|
|
|
|
if (pwrdm->pwrdm_clkdms[i] == clkdm) {
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto pac_exit;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
if (i == PWRDM_MAX_CLKDMS) {
|
2012-07-26 14:54:26 +08:00
|
|
|
pr_debug("powerdomain: %s: increase PWRDM_MAX_CLKDMS for clkdm %s\n",
|
|
|
|
pwrdm->name, clkdm->name);
|
2008-08-19 16:08:44 +08:00
|
|
|
WARN_ON(1);
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto pac_exit;
|
|
|
|
}
|
|
|
|
|
|
|
|
pwrdm->pwrdm_clkdms[i] = clkdm;
|
|
|
|
|
|
|
|
ret = 0;
|
|
|
|
|
|
|
|
pac_exit:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pwrdm_del_clkdm - remove a clockdomain from a powerdomain
|
|
|
|
* @pwrdm: struct powerdomain * to add the clockdomain to
|
|
|
|
* @clkdm: struct clockdomain * to associate with a powerdomain
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Dissociate the clockdomain @clkdm from the powerdomain
|
|
|
|
* @pwrdm. Returns -EINVAL if presented with invalid pointers; -ENOENT
|
|
|
|
* if @clkdm was not associated with the powerdomain, or 0 upon
|
|
|
|
* success.
|
2008-08-19 16:08:44 +08:00
|
|
|
*/
|
|
|
|
int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm)
|
|
|
|
{
|
|
|
|
int ret = -EINVAL;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (!pwrdm || !clkdm)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2012-07-26 14:54:26 +08:00
|
|
|
pr_debug("powerdomain: %s: dissociating clockdomain %s\n",
|
|
|
|
pwrdm->name, clkdm->name);
|
2008-08-19 16:08:44 +08:00
|
|
|
|
|
|
|
for (i = 0; i < PWRDM_MAX_CLKDMS; i++)
|
|
|
|
if (pwrdm->pwrdm_clkdms[i] == clkdm)
|
|
|
|
break;
|
|
|
|
|
|
|
|
if (i == PWRDM_MAX_CLKDMS) {
|
2012-07-26 14:54:26 +08:00
|
|
|
pr_debug("powerdomain: %s: clkdm %s not associated?!\n",
|
|
|
|
pwrdm->name, clkdm->name);
|
2008-08-19 16:08:44 +08:00
|
|
|
ret = -ENOENT;
|
|
|
|
goto pdc_exit;
|
|
|
|
}
|
|
|
|
|
|
|
|
pwrdm->pwrdm_clkdms[i] = NULL;
|
|
|
|
|
|
|
|
ret = 0;
|
|
|
|
|
|
|
|
pdc_exit:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pwrdm_for_each_clkdm - call function on each clkdm in a pwrdm
|
|
|
|
* @pwrdm: struct powerdomain * to iterate over
|
|
|
|
* @fn: callback function *
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Call the supplied function @fn for each clockdomain in the powerdomain
|
|
|
|
* @pwrdm. The callback function can return anything but 0 to bail
|
2010-01-27 11:13:00 +08:00
|
|
|
* out early from the iterator. Returns -EINVAL if presented with
|
|
|
|
* invalid pointers; or passes along the last return value of the
|
|
|
|
* callback function, which should be 0 for success or anything else
|
|
|
|
* to indicate failure.
|
2008-08-19 16:08:44 +08:00
|
|
|
*/
|
|
|
|
int pwrdm_for_each_clkdm(struct powerdomain *pwrdm,
|
|
|
|
int (*fn)(struct powerdomain *pwrdm,
|
|
|
|
struct clockdomain *clkdm))
|
|
|
|
{
|
|
|
|
int ret = 0;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (!fn)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
for (i = 0; i < PWRDM_MAX_CLKDMS && !ret; i++)
|
|
|
|
ret = (*fn)(pwrdm, pwrdm->pwrdm_clkdms[i]);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2011-03-17 06:52:47 +08:00
|
|
|
/**
|
|
|
|
* pwrdm_get_voltdm - return a ptr to the voltdm that this pwrdm resides in
|
|
|
|
* @pwrdm: struct powerdomain *
|
|
|
|
*
|
|
|
|
* Return a pointer to the struct voltageomain that the specified powerdomain
|
|
|
|
* @pwrdm exists in.
|
|
|
|
*/
|
|
|
|
struct voltagedomain *pwrdm_get_voltdm(struct powerdomain *pwrdm)
|
|
|
|
{
|
|
|
|
return pwrdm->voltdm.ptr;
|
|
|
|
}
|
|
|
|
|
2008-08-19 16:08:40 +08:00
|
|
|
/**
|
|
|
|
* pwrdm_get_mem_bank_count - get number of memory banks in this powerdomain
|
|
|
|
* @pwrdm: struct powerdomain *
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Return the number of controllable memory banks in powerdomain @pwrdm,
|
2008-08-19 16:08:40 +08:00
|
|
|
* starting with 1. Returns -EINVAL if the powerdomain pointer is null.
|
|
|
|
*/
|
|
|
|
int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm)
|
|
|
|
{
|
|
|
|
if (!pwrdm)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
return pwrdm->banks;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pwrdm_set_next_pwrst - set next powerdomain power state
|
|
|
|
* @pwrdm: struct powerdomain * to set
|
|
|
|
* @pwrst: one of the PWRDM_POWER_* macros
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Set the powerdomain @pwrdm's next power state to @pwrst. The powerdomain
|
2008-08-19 16:08:40 +08:00
|
|
|
* may not enter this state immediately if the preconditions for this state
|
|
|
|
* have not been satisfied. Returns -EINVAL if the powerdomain pointer is
|
|
|
|
* null or if the power state is invalid for the powerdomin, or returns 0
|
|
|
|
* upon success.
|
|
|
|
*/
|
|
|
|
int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
|
|
|
|
{
|
2010-12-22 11:01:18 +08:00
|
|
|
int ret = -EINVAL;
|
|
|
|
|
2008-08-19 16:08:40 +08:00
|
|
|
if (!pwrdm)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (!(pwrdm->pwrsts & (1 << pwrst)))
|
|
|
|
return -EINVAL;
|
|
|
|
|
2012-07-26 14:54:26 +08:00
|
|
|
pr_debug("powerdomain: %s: setting next powerstate to %0x\n",
|
2008-08-19 16:08:40 +08:00
|
|
|
pwrdm->name, pwrst);
|
|
|
|
|
2011-03-03 18:25:43 +08:00
|
|
|
if (arch_pwrdm && arch_pwrdm->pwrdm_set_next_pwrst) {
|
|
|
|
/* Trace the pwrdm desired target state */
|
|
|
|
trace_power_domain_target(pwrdm->name, pwrst,
|
|
|
|
smp_processor_id());
|
|
|
|
/* Program the pwrdm desired target state */
|
2010-12-22 11:01:18 +08:00
|
|
|
ret = arch_pwrdm->pwrdm_set_next_pwrst(pwrdm, pwrst);
|
2011-03-03 18:25:43 +08:00
|
|
|
}
|
2008-08-19 16:08:40 +08:00
|
|
|
|
2010-12-22 11:01:18 +08:00
|
|
|
return ret;
|
2008-08-19 16:08:40 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pwrdm_read_next_pwrst - get next powerdomain power state
|
|
|
|
* @pwrdm: struct powerdomain * to get power state
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Return the powerdomain @pwrdm's next power state. Returns -EINVAL
|
2008-08-19 16:08:40 +08:00
|
|
|
* if the powerdomain pointer is null or returns the next power state
|
|
|
|
* upon success.
|
|
|
|
*/
|
|
|
|
int pwrdm_read_next_pwrst(struct powerdomain *pwrdm)
|
|
|
|
{
|
2010-12-22 11:01:18 +08:00
|
|
|
int ret = -EINVAL;
|
|
|
|
|
2008-08-19 16:08:40 +08:00
|
|
|
if (!pwrdm)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2010-12-22 11:01:18 +08:00
|
|
|
if (arch_pwrdm && arch_pwrdm->pwrdm_read_next_pwrst)
|
|
|
|
ret = arch_pwrdm->pwrdm_read_next_pwrst(pwrdm);
|
|
|
|
|
|
|
|
return ret;
|
2008-08-19 16:08:40 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pwrdm_read_pwrst - get current powerdomain power state
|
|
|
|
* @pwrdm: struct powerdomain * to get power state
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Return the powerdomain @pwrdm's current power state. Returns -EINVAL
|
2008-08-19 16:08:40 +08:00
|
|
|
* if the powerdomain pointer is null or returns the current power state
|
2012-06-30 05:04:52 +08:00
|
|
|
* upon success. Note that if the power domain only supports the ON state
|
|
|
|
* then just return ON as the current state.
|
2008-08-19 16:08:40 +08:00
|
|
|
*/
|
|
|
|
int pwrdm_read_pwrst(struct powerdomain *pwrdm)
|
|
|
|
{
|
2010-12-22 11:01:18 +08:00
|
|
|
int ret = -EINVAL;
|
|
|
|
|
2008-08-19 16:08:40 +08:00
|
|
|
if (!pwrdm)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2012-06-30 05:04:52 +08:00
|
|
|
if (pwrdm->pwrsts == PWRSTS_ON)
|
|
|
|
return PWRDM_POWER_ON;
|
|
|
|
|
2010-12-22 11:01:18 +08:00
|
|
|
if (arch_pwrdm && arch_pwrdm->pwrdm_read_pwrst)
|
|
|
|
ret = arch_pwrdm->pwrdm_read_pwrst(pwrdm);
|
|
|
|
|
|
|
|
return ret;
|
2008-08-19 16:08:40 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pwrdm_read_prev_pwrst - get previous powerdomain power state
|
|
|
|
* @pwrdm: struct powerdomain * to get previous power state
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Return the powerdomain @pwrdm's previous power state. Returns -EINVAL
|
2008-08-19 16:08:40 +08:00
|
|
|
* if the powerdomain pointer is null or returns the previous power state
|
|
|
|
* upon success.
|
|
|
|
*/
|
|
|
|
int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm)
|
|
|
|
{
|
2010-12-22 11:01:18 +08:00
|
|
|
int ret = -EINVAL;
|
|
|
|
|
2008-08-19 16:08:40 +08:00
|
|
|
if (!pwrdm)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2010-12-22 11:01:18 +08:00
|
|
|
if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_pwrst)
|
|
|
|
ret = arch_pwrdm->pwrdm_read_prev_pwrst(pwrdm);
|
|
|
|
|
|
|
|
return ret;
|
2008-08-19 16:08:40 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pwrdm_set_logic_retst - set powerdomain logic power state upon retention
|
|
|
|
* @pwrdm: struct powerdomain * to set
|
|
|
|
* @pwrst: one of the PWRDM_POWER_* macros
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Set the next power state @pwrst that the logic portion of the
|
|
|
|
* powerdomain @pwrdm will enter when the powerdomain enters retention.
|
|
|
|
* This will be either RETENTION or OFF, if supported. Returns
|
|
|
|
* -EINVAL if the powerdomain pointer is null or the target power
|
|
|
|
* state is not not supported, or returns 0 upon success.
|
2008-08-19 16:08:40 +08:00
|
|
|
*/
|
|
|
|
int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst)
|
|
|
|
{
|
2010-12-22 11:01:18 +08:00
|
|
|
int ret = -EINVAL;
|
2010-05-19 08:47:24 +08:00
|
|
|
|
2008-08-19 16:08:40 +08:00
|
|
|
if (!pwrdm)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (!(pwrdm->pwrsts_logic_ret & (1 << pwrst)))
|
|
|
|
return -EINVAL;
|
|
|
|
|
2012-07-26 14:54:26 +08:00
|
|
|
pr_debug("powerdomain: %s: setting next logic powerstate to %0x\n",
|
2008-08-19 16:08:40 +08:00
|
|
|
pwrdm->name, pwrst);
|
|
|
|
|
2010-12-22 11:01:18 +08:00
|
|
|
if (arch_pwrdm && arch_pwrdm->pwrdm_set_logic_retst)
|
|
|
|
ret = arch_pwrdm->pwrdm_set_logic_retst(pwrdm, pwrst);
|
2008-08-19 16:08:40 +08:00
|
|
|
|
2010-12-22 11:01:18 +08:00
|
|
|
return ret;
|
2008-08-19 16:08:40 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pwrdm_set_mem_onst - set memory power state while powerdomain ON
|
|
|
|
* @pwrdm: struct powerdomain * to set
|
|
|
|
* @bank: memory bank number to set (0-3)
|
|
|
|
* @pwrst: one of the PWRDM_POWER_* macros
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Set the next power state @pwrst that memory bank @bank of the
|
|
|
|
* powerdomain @pwrdm will enter when the powerdomain enters the ON
|
|
|
|
* state. @bank will be a number from 0 to 3, and represents different
|
|
|
|
* types of memory, depending on the powerdomain. Returns -EINVAL if
|
|
|
|
* the powerdomain pointer is null or the target power state is not
|
|
|
|
* not supported for this memory bank, -EEXIST if the target memory
|
|
|
|
* bank does not exist or is not controllable, or returns 0 upon
|
|
|
|
* success.
|
2008-08-19 16:08:40 +08:00
|
|
|
*/
|
|
|
|
int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
|
|
|
|
{
|
2010-12-22 11:01:19 +08:00
|
|
|
int ret = -EINVAL;
|
2008-08-19 16:08:40 +08:00
|
|
|
|
|
|
|
if (!pwrdm)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (pwrdm->banks < (bank + 1))
|
|
|
|
return -EEXIST;
|
|
|
|
|
|
|
|
if (!(pwrdm->pwrsts_mem_on[bank] & (1 << pwrst)))
|
|
|
|
return -EINVAL;
|
|
|
|
|
2012-07-26 14:54:26 +08:00
|
|
|
pr_debug("powerdomain: %s: setting next memory powerstate for bank %0x while pwrdm-ON to %0x\n",
|
|
|
|
pwrdm->name, bank, pwrst);
|
2008-08-19 16:08:40 +08:00
|
|
|
|
2010-12-22 11:01:19 +08:00
|
|
|
if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_onst)
|
|
|
|
ret = arch_pwrdm->pwrdm_set_mem_onst(pwrdm, bank, pwrst);
|
2008-08-19 16:08:40 +08:00
|
|
|
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
2008-08-19 16:08:40 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pwrdm_set_mem_retst - set memory power state while powerdomain in RET
|
|
|
|
* @pwrdm: struct powerdomain * to set
|
|
|
|
* @bank: memory bank number to set (0-3)
|
|
|
|
* @pwrst: one of the PWRDM_POWER_* macros
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Set the next power state @pwrst that memory bank @bank of the
|
|
|
|
* powerdomain @pwrdm will enter when the powerdomain enters the
|
|
|
|
* RETENTION state. Bank will be a number from 0 to 3, and represents
|
|
|
|
* different types of memory, depending on the powerdomain. @pwrst
|
|
|
|
* will be either RETENTION or OFF, if supported. Returns -EINVAL if
|
|
|
|
* the powerdomain pointer is null or the target power state is not
|
|
|
|
* not supported for this memory bank, -EEXIST if the target memory
|
|
|
|
* bank does not exist or is not controllable, or returns 0 upon
|
|
|
|
* success.
|
2008-08-19 16:08:40 +08:00
|
|
|
*/
|
|
|
|
int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
|
|
|
|
{
|
2010-12-22 11:01:19 +08:00
|
|
|
int ret = -EINVAL;
|
2008-08-19 16:08:40 +08:00
|
|
|
|
|
|
|
if (!pwrdm)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (pwrdm->banks < (bank + 1))
|
|
|
|
return -EEXIST;
|
|
|
|
|
|
|
|
if (!(pwrdm->pwrsts_mem_ret[bank] & (1 << pwrst)))
|
|
|
|
return -EINVAL;
|
|
|
|
|
2012-07-26 14:54:26 +08:00
|
|
|
pr_debug("powerdomain: %s: setting next memory powerstate for bank %0x while pwrdm-RET to %0x\n",
|
|
|
|
pwrdm->name, bank, pwrst);
|
2008-08-19 16:08:40 +08:00
|
|
|
|
2010-12-22 11:01:19 +08:00
|
|
|
if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_retst)
|
|
|
|
ret = arch_pwrdm->pwrdm_set_mem_retst(pwrdm, bank, pwrst);
|
2008-08-19 16:08:40 +08:00
|
|
|
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
2008-08-19 16:08:40 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pwrdm_read_logic_pwrst - get current powerdomain logic retention power state
|
|
|
|
* @pwrdm: struct powerdomain * to get current logic retention power state
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Return the power state that the logic portion of powerdomain @pwrdm
|
|
|
|
* will enter when the powerdomain enters retention. Returns -EINVAL
|
|
|
|
* if the powerdomain pointer is null or returns the logic retention
|
|
|
|
* power state upon success.
|
2008-08-19 16:08:40 +08:00
|
|
|
*/
|
|
|
|
int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm)
|
|
|
|
{
|
2010-12-22 11:01:18 +08:00
|
|
|
int ret = -EINVAL;
|
|
|
|
|
2008-08-19 16:08:40 +08:00
|
|
|
if (!pwrdm)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2010-12-22 11:01:18 +08:00
|
|
|
if (arch_pwrdm && arch_pwrdm->pwrdm_read_logic_pwrst)
|
|
|
|
ret = arch_pwrdm->pwrdm_read_logic_pwrst(pwrdm);
|
|
|
|
|
|
|
|
return ret;
|
2008-08-19 16:08:40 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pwrdm_read_prev_logic_pwrst - get previous powerdomain logic power state
|
|
|
|
* @pwrdm: struct powerdomain * to get previous logic power state
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Return the powerdomain @pwrdm's previous logic power state. Returns
|
|
|
|
* -EINVAL if the powerdomain pointer is null or returns the previous
|
|
|
|
* logic power state upon success.
|
2008-08-19 16:08:40 +08:00
|
|
|
*/
|
|
|
|
int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm)
|
|
|
|
{
|
2010-12-22 11:01:18 +08:00
|
|
|
int ret = -EINVAL;
|
|
|
|
|
2008-08-19 16:08:40 +08:00
|
|
|
if (!pwrdm)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2010-12-22 11:01:18 +08:00
|
|
|
if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_logic_pwrst)
|
|
|
|
ret = arch_pwrdm->pwrdm_read_prev_logic_pwrst(pwrdm);
|
|
|
|
|
|
|
|
return ret;
|
2008-08-19 16:08:40 +08:00
|
|
|
}
|
|
|
|
|
2010-02-25 03:05:49 +08:00
|
|
|
/**
|
|
|
|
* pwrdm_read_logic_retst - get next powerdomain logic power state
|
|
|
|
* @pwrdm: struct powerdomain * to get next logic power state
|
|
|
|
*
|
|
|
|
* Return the powerdomain pwrdm's logic power state. Returns -EINVAL
|
|
|
|
* if the powerdomain pointer is null or returns the next logic
|
|
|
|
* power state upon success.
|
|
|
|
*/
|
|
|
|
int pwrdm_read_logic_retst(struct powerdomain *pwrdm)
|
|
|
|
{
|
2010-12-22 11:01:18 +08:00
|
|
|
int ret = -EINVAL;
|
|
|
|
|
2010-02-25 03:05:49 +08:00
|
|
|
if (!pwrdm)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2010-12-22 11:01:18 +08:00
|
|
|
if (arch_pwrdm && arch_pwrdm->pwrdm_read_logic_retst)
|
|
|
|
ret = arch_pwrdm->pwrdm_read_logic_retst(pwrdm);
|
|
|
|
|
|
|
|
return ret;
|
2010-02-25 03:05:49 +08:00
|
|
|
}
|
|
|
|
|
2008-08-19 16:08:40 +08:00
|
|
|
/**
|
|
|
|
* pwrdm_read_mem_pwrst - get current memory bank power state
|
|
|
|
* @pwrdm: struct powerdomain * to get current memory bank power state
|
|
|
|
* @bank: memory bank number (0-3)
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Return the powerdomain @pwrdm's current memory power state for bank
|
|
|
|
* @bank. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if
|
2008-08-19 16:08:40 +08:00
|
|
|
* the target memory bank does not exist or is not controllable, or
|
|
|
|
* returns the current memory power state upon success.
|
|
|
|
*/
|
|
|
|
int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
|
|
|
|
{
|
2010-12-22 11:01:19 +08:00
|
|
|
int ret = -EINVAL;
|
2008-08-19 16:08:40 +08:00
|
|
|
|
|
|
|
if (!pwrdm)
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
2008-08-19 16:08:40 +08:00
|
|
|
|
|
|
|
if (pwrdm->banks < (bank + 1))
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
2008-08-19 16:08:40 +08:00
|
|
|
|
2009-12-09 07:33:15 +08:00
|
|
|
if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK)
|
|
|
|
bank = 1;
|
|
|
|
|
2010-12-22 11:01:19 +08:00
|
|
|
if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_pwrst)
|
|
|
|
ret = arch_pwrdm->pwrdm_read_mem_pwrst(pwrdm, bank);
|
2008-08-19 16:08:40 +08:00
|
|
|
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
2008-08-19 16:08:40 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pwrdm_read_prev_mem_pwrst - get previous memory bank power state
|
|
|
|
* @pwrdm: struct powerdomain * to get previous memory bank power state
|
|
|
|
* @bank: memory bank number (0-3)
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Return the powerdomain @pwrdm's previous memory power state for
|
|
|
|
* bank @bank. Returns -EINVAL if the powerdomain pointer is null,
|
|
|
|
* -EEXIST if the target memory bank does not exist or is not
|
|
|
|
* controllable, or returns the previous memory power state upon
|
|
|
|
* success.
|
2008-08-19 16:08:40 +08:00
|
|
|
*/
|
|
|
|
int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
|
|
|
|
{
|
2010-12-22 11:01:19 +08:00
|
|
|
int ret = -EINVAL;
|
2008-08-19 16:08:40 +08:00
|
|
|
|
|
|
|
if (!pwrdm)
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
2008-08-19 16:08:40 +08:00
|
|
|
|
|
|
|
if (pwrdm->banks < (bank + 1))
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
2008-08-19 16:08:40 +08:00
|
|
|
|
2009-12-09 07:33:15 +08:00
|
|
|
if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK)
|
|
|
|
bank = 1;
|
|
|
|
|
2010-12-22 11:01:19 +08:00
|
|
|
if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_mem_pwrst)
|
|
|
|
ret = arch_pwrdm->pwrdm_read_prev_mem_pwrst(pwrdm, bank);
|
2008-08-19 16:08:40 +08:00
|
|
|
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
2008-08-19 16:08:40 +08:00
|
|
|
}
|
|
|
|
|
2010-02-25 03:05:49 +08:00
|
|
|
/**
|
|
|
|
* pwrdm_read_mem_retst - get next memory bank power state
|
|
|
|
* @pwrdm: struct powerdomain * to get mext memory bank power state
|
|
|
|
* @bank: memory bank number (0-3)
|
|
|
|
*
|
|
|
|
* Return the powerdomain pwrdm's next memory power state for bank
|
|
|
|
* x. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if
|
|
|
|
* the target memory bank does not exist or is not controllable, or
|
|
|
|
* returns the next memory power state upon success.
|
|
|
|
*/
|
|
|
|
int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)
|
|
|
|
{
|
2010-12-22 11:01:19 +08:00
|
|
|
int ret = -EINVAL;
|
2010-02-25 03:05:49 +08:00
|
|
|
|
|
|
|
if (!pwrdm)
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
2010-02-25 03:05:49 +08:00
|
|
|
|
|
|
|
if (pwrdm->banks < (bank + 1))
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
2010-02-25 03:05:49 +08:00
|
|
|
|
2010-12-22 11:01:19 +08:00
|
|
|
if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_retst)
|
|
|
|
ret = arch_pwrdm->pwrdm_read_mem_retst(pwrdm, bank);
|
2010-02-25 03:05:49 +08:00
|
|
|
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
2010-02-25 03:05:49 +08:00
|
|
|
}
|
|
|
|
|
2008-08-19 16:08:40 +08:00
|
|
|
/**
|
|
|
|
* pwrdm_clear_all_prev_pwrst - clear previous powerstate register for a pwrdm
|
|
|
|
* @pwrdm: struct powerdomain * to clear
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Clear the powerdomain's previous power state register @pwrdm.
|
|
|
|
* Clears the entire register, including logic and memory bank
|
|
|
|
* previous power states. Returns -EINVAL if the powerdomain pointer
|
|
|
|
* is null, or returns 0 upon success.
|
2008-08-19 16:08:40 +08:00
|
|
|
*/
|
|
|
|
int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm)
|
|
|
|
{
|
2010-12-22 11:01:19 +08:00
|
|
|
int ret = -EINVAL;
|
|
|
|
|
2008-08-19 16:08:40 +08:00
|
|
|
if (!pwrdm)
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
2008-08-19 16:08:40 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* XXX should get the powerdomain's current state here;
|
|
|
|
* warn & fail if it is not ON.
|
|
|
|
*/
|
|
|
|
|
2012-07-26 14:54:26 +08:00
|
|
|
pr_debug("powerdomain: %s: clearing previous power state reg\n",
|
2008-08-19 16:08:40 +08:00
|
|
|
pwrdm->name);
|
|
|
|
|
2010-12-22 11:01:19 +08:00
|
|
|
if (arch_pwrdm && arch_pwrdm->pwrdm_clear_all_prev_pwrst)
|
|
|
|
ret = arch_pwrdm->pwrdm_clear_all_prev_pwrst(pwrdm);
|
2008-08-19 16:08:40 +08:00
|
|
|
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
2008-08-19 16:08:40 +08:00
|
|
|
}
|
|
|
|
|
[ARM] OMAP3 pwrdm: add hardware save-and-restore (SAR) support
OMAP3430ES2+ introduces a new feature: optional powerdomain context
hardware save-and-restore (SAR). Currently, this feature only applies
to USBHOST and USBTLL module context when the USBHOST or CORE
powerdomains enter a low-power sleep state[1]. This feature avoids
re-enumeration of USB devices when the powerdomains return from idle,
which is potentially time-consuming.
This patch adds support for enabling and disabling hardware
save-and-restore to the powerdomain code. Three new functions are
added, pwrdm_enable_hdwr_sar(), pwrdm_disable_hdwr_sar(), and
pwrdm_can_hdwr_sar(). A new struct powerdomain "flags" field is
added, with a PWRDM_HAS_HDWR_SAR flag to indicate powerdomains with
SAR support.
Thanks to Jouni Högander <jouni.hogander@nokia.com> for reviewing an
earlier version of these patches, and Richard Woodruff <r-woodruff2@ti.com>
for clarifying the purpose of these bits.
1. For the USBHOST controller module, context loss occurs when the
USBHOST powerdomain enters off-idle. For USBTLL, context loss
occurs either if CORE enters off-idle, or if the CORE logic is
configured to turn off when CORE enters retention-idle (OSWR).
34xx ES2 TRM 4.8.6.1.1, 4.8.6.1.2
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-26 08:09:37 +08:00
|
|
|
/**
|
|
|
|
* pwrdm_enable_hdwr_sar - enable automatic hardware SAR for a pwrdm
|
|
|
|
* @pwrdm: struct powerdomain *
|
|
|
|
*
|
|
|
|
* Enable automatic context save-and-restore upon power state change
|
2010-01-27 11:13:02 +08:00
|
|
|
* for some devices in the powerdomain @pwrdm. Warning: this only
|
|
|
|
* affects a subset of devices in a powerdomain; check the TRM
|
|
|
|
* closely. Returns -EINVAL if the powerdomain pointer is null or if
|
|
|
|
* the powerdomain does not support automatic save-and-restore, or
|
|
|
|
* returns 0 upon success.
|
[ARM] OMAP3 pwrdm: add hardware save-and-restore (SAR) support
OMAP3430ES2+ introduces a new feature: optional powerdomain context
hardware save-and-restore (SAR). Currently, this feature only applies
to USBHOST and USBTLL module context when the USBHOST or CORE
powerdomains enter a low-power sleep state[1]. This feature avoids
re-enumeration of USB devices when the powerdomains return from idle,
which is potentially time-consuming.
This patch adds support for enabling and disabling hardware
save-and-restore to the powerdomain code. Three new functions are
added, pwrdm_enable_hdwr_sar(), pwrdm_disable_hdwr_sar(), and
pwrdm_can_hdwr_sar(). A new struct powerdomain "flags" field is
added, with a PWRDM_HAS_HDWR_SAR flag to indicate powerdomains with
SAR support.
Thanks to Jouni Högander <jouni.hogander@nokia.com> for reviewing an
earlier version of these patches, and Richard Woodruff <r-woodruff2@ti.com>
for clarifying the purpose of these bits.
1. For the USBHOST controller module, context loss occurs when the
USBHOST powerdomain enters off-idle. For USBTLL, context loss
occurs either if CORE enters off-idle, or if the CORE logic is
configured to turn off when CORE enters retention-idle (OSWR).
34xx ES2 TRM 4.8.6.1.1, 4.8.6.1.2
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-26 08:09:37 +08:00
|
|
|
*/
|
|
|
|
int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm)
|
|
|
|
{
|
2010-12-22 11:01:19 +08:00
|
|
|
int ret = -EINVAL;
|
|
|
|
|
[ARM] OMAP3 pwrdm: add hardware save-and-restore (SAR) support
OMAP3430ES2+ introduces a new feature: optional powerdomain context
hardware save-and-restore (SAR). Currently, this feature only applies
to USBHOST and USBTLL module context when the USBHOST or CORE
powerdomains enter a low-power sleep state[1]. This feature avoids
re-enumeration of USB devices when the powerdomains return from idle,
which is potentially time-consuming.
This patch adds support for enabling and disabling hardware
save-and-restore to the powerdomain code. Three new functions are
added, pwrdm_enable_hdwr_sar(), pwrdm_disable_hdwr_sar(), and
pwrdm_can_hdwr_sar(). A new struct powerdomain "flags" field is
added, with a PWRDM_HAS_HDWR_SAR flag to indicate powerdomains with
SAR support.
Thanks to Jouni Högander <jouni.hogander@nokia.com> for reviewing an
earlier version of these patches, and Richard Woodruff <r-woodruff2@ti.com>
for clarifying the purpose of these bits.
1. For the USBHOST controller module, context loss occurs when the
USBHOST powerdomain enters off-idle. For USBTLL, context loss
occurs either if CORE enters off-idle, or if the CORE logic is
configured to turn off when CORE enters retention-idle (OSWR).
34xx ES2 TRM 4.8.6.1.1, 4.8.6.1.2
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-26 08:09:37 +08:00
|
|
|
if (!pwrdm)
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
[ARM] OMAP3 pwrdm: add hardware save-and-restore (SAR) support
OMAP3430ES2+ introduces a new feature: optional powerdomain context
hardware save-and-restore (SAR). Currently, this feature only applies
to USBHOST and USBTLL module context when the USBHOST or CORE
powerdomains enter a low-power sleep state[1]. This feature avoids
re-enumeration of USB devices when the powerdomains return from idle,
which is potentially time-consuming.
This patch adds support for enabling and disabling hardware
save-and-restore to the powerdomain code. Three new functions are
added, pwrdm_enable_hdwr_sar(), pwrdm_disable_hdwr_sar(), and
pwrdm_can_hdwr_sar(). A new struct powerdomain "flags" field is
added, with a PWRDM_HAS_HDWR_SAR flag to indicate powerdomains with
SAR support.
Thanks to Jouni Högander <jouni.hogander@nokia.com> for reviewing an
earlier version of these patches, and Richard Woodruff <r-woodruff2@ti.com>
for clarifying the purpose of these bits.
1. For the USBHOST controller module, context loss occurs when the
USBHOST powerdomain enters off-idle. For USBTLL, context loss
occurs either if CORE enters off-idle, or if the CORE logic is
configured to turn off when CORE enters retention-idle (OSWR).
34xx ES2 TRM 4.8.6.1.1, 4.8.6.1.2
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-26 08:09:37 +08:00
|
|
|
|
|
|
|
if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR))
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
[ARM] OMAP3 pwrdm: add hardware save-and-restore (SAR) support
OMAP3430ES2+ introduces a new feature: optional powerdomain context
hardware save-and-restore (SAR). Currently, this feature only applies
to USBHOST and USBTLL module context when the USBHOST or CORE
powerdomains enter a low-power sleep state[1]. This feature avoids
re-enumeration of USB devices when the powerdomains return from idle,
which is potentially time-consuming.
This patch adds support for enabling and disabling hardware
save-and-restore to the powerdomain code. Three new functions are
added, pwrdm_enable_hdwr_sar(), pwrdm_disable_hdwr_sar(), and
pwrdm_can_hdwr_sar(). A new struct powerdomain "flags" field is
added, with a PWRDM_HAS_HDWR_SAR flag to indicate powerdomains with
SAR support.
Thanks to Jouni Högander <jouni.hogander@nokia.com> for reviewing an
earlier version of these patches, and Richard Woodruff <r-woodruff2@ti.com>
for clarifying the purpose of these bits.
1. For the USBHOST controller module, context loss occurs when the
USBHOST powerdomain enters off-idle. For USBTLL, context loss
occurs either if CORE enters off-idle, or if the CORE logic is
configured to turn off when CORE enters retention-idle (OSWR).
34xx ES2 TRM 4.8.6.1.1, 4.8.6.1.2
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-26 08:09:37 +08:00
|
|
|
|
2012-07-26 14:54:26 +08:00
|
|
|
pr_debug("powerdomain: %s: setting SAVEANDRESTORE bit\n", pwrdm->name);
|
[ARM] OMAP3 pwrdm: add hardware save-and-restore (SAR) support
OMAP3430ES2+ introduces a new feature: optional powerdomain context
hardware save-and-restore (SAR). Currently, this feature only applies
to USBHOST and USBTLL module context when the USBHOST or CORE
powerdomains enter a low-power sleep state[1]. This feature avoids
re-enumeration of USB devices when the powerdomains return from idle,
which is potentially time-consuming.
This patch adds support for enabling and disabling hardware
save-and-restore to the powerdomain code. Three new functions are
added, pwrdm_enable_hdwr_sar(), pwrdm_disable_hdwr_sar(), and
pwrdm_can_hdwr_sar(). A new struct powerdomain "flags" field is
added, with a PWRDM_HAS_HDWR_SAR flag to indicate powerdomains with
SAR support.
Thanks to Jouni Högander <jouni.hogander@nokia.com> for reviewing an
earlier version of these patches, and Richard Woodruff <r-woodruff2@ti.com>
for clarifying the purpose of these bits.
1. For the USBHOST controller module, context loss occurs when the
USBHOST powerdomain enters off-idle. For USBTLL, context loss
occurs either if CORE enters off-idle, or if the CORE logic is
configured to turn off when CORE enters retention-idle (OSWR).
34xx ES2 TRM 4.8.6.1.1, 4.8.6.1.2
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-26 08:09:37 +08:00
|
|
|
|
2010-12-22 11:01:19 +08:00
|
|
|
if (arch_pwrdm && arch_pwrdm->pwrdm_enable_hdwr_sar)
|
|
|
|
ret = arch_pwrdm->pwrdm_enable_hdwr_sar(pwrdm);
|
[ARM] OMAP3 pwrdm: add hardware save-and-restore (SAR) support
OMAP3430ES2+ introduces a new feature: optional powerdomain context
hardware save-and-restore (SAR). Currently, this feature only applies
to USBHOST and USBTLL module context when the USBHOST or CORE
powerdomains enter a low-power sleep state[1]. This feature avoids
re-enumeration of USB devices when the powerdomains return from idle,
which is potentially time-consuming.
This patch adds support for enabling and disabling hardware
save-and-restore to the powerdomain code. Three new functions are
added, pwrdm_enable_hdwr_sar(), pwrdm_disable_hdwr_sar(), and
pwrdm_can_hdwr_sar(). A new struct powerdomain "flags" field is
added, with a PWRDM_HAS_HDWR_SAR flag to indicate powerdomains with
SAR support.
Thanks to Jouni Högander <jouni.hogander@nokia.com> for reviewing an
earlier version of these patches, and Richard Woodruff <r-woodruff2@ti.com>
for clarifying the purpose of these bits.
1. For the USBHOST controller module, context loss occurs when the
USBHOST powerdomain enters off-idle. For USBTLL, context loss
occurs either if CORE enters off-idle, or if the CORE logic is
configured to turn off when CORE enters retention-idle (OSWR).
34xx ES2 TRM 4.8.6.1.1, 4.8.6.1.2
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-26 08:09:37 +08:00
|
|
|
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
[ARM] OMAP3 pwrdm: add hardware save-and-restore (SAR) support
OMAP3430ES2+ introduces a new feature: optional powerdomain context
hardware save-and-restore (SAR). Currently, this feature only applies
to USBHOST and USBTLL module context when the USBHOST or CORE
powerdomains enter a low-power sleep state[1]. This feature avoids
re-enumeration of USB devices when the powerdomains return from idle,
which is potentially time-consuming.
This patch adds support for enabling and disabling hardware
save-and-restore to the powerdomain code. Three new functions are
added, pwrdm_enable_hdwr_sar(), pwrdm_disable_hdwr_sar(), and
pwrdm_can_hdwr_sar(). A new struct powerdomain "flags" field is
added, with a PWRDM_HAS_HDWR_SAR flag to indicate powerdomains with
SAR support.
Thanks to Jouni Högander <jouni.hogander@nokia.com> for reviewing an
earlier version of these patches, and Richard Woodruff <r-woodruff2@ti.com>
for clarifying the purpose of these bits.
1. For the USBHOST controller module, context loss occurs when the
USBHOST powerdomain enters off-idle. For USBTLL, context loss
occurs either if CORE enters off-idle, or if the CORE logic is
configured to turn off when CORE enters retention-idle (OSWR).
34xx ES2 TRM 4.8.6.1.1, 4.8.6.1.2
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-26 08:09:37 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pwrdm_disable_hdwr_sar - disable automatic hardware SAR for a pwrdm
|
|
|
|
* @pwrdm: struct powerdomain *
|
|
|
|
*
|
|
|
|
* Disable automatic context save-and-restore upon power state change
|
2010-01-27 11:13:02 +08:00
|
|
|
* for some devices in the powerdomain @pwrdm. Warning: this only
|
|
|
|
* affects a subset of devices in a powerdomain; check the TRM
|
|
|
|
* closely. Returns -EINVAL if the powerdomain pointer is null or if
|
|
|
|
* the powerdomain does not support automatic save-and-restore, or
|
|
|
|
* returns 0 upon success.
|
[ARM] OMAP3 pwrdm: add hardware save-and-restore (SAR) support
OMAP3430ES2+ introduces a new feature: optional powerdomain context
hardware save-and-restore (SAR). Currently, this feature only applies
to USBHOST and USBTLL module context when the USBHOST or CORE
powerdomains enter a low-power sleep state[1]. This feature avoids
re-enumeration of USB devices when the powerdomains return from idle,
which is potentially time-consuming.
This patch adds support for enabling and disabling hardware
save-and-restore to the powerdomain code. Three new functions are
added, pwrdm_enable_hdwr_sar(), pwrdm_disable_hdwr_sar(), and
pwrdm_can_hdwr_sar(). A new struct powerdomain "flags" field is
added, with a PWRDM_HAS_HDWR_SAR flag to indicate powerdomains with
SAR support.
Thanks to Jouni Högander <jouni.hogander@nokia.com> for reviewing an
earlier version of these patches, and Richard Woodruff <r-woodruff2@ti.com>
for clarifying the purpose of these bits.
1. For the USBHOST controller module, context loss occurs when the
USBHOST powerdomain enters off-idle. For USBTLL, context loss
occurs either if CORE enters off-idle, or if the CORE logic is
configured to turn off when CORE enters retention-idle (OSWR).
34xx ES2 TRM 4.8.6.1.1, 4.8.6.1.2
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-26 08:09:37 +08:00
|
|
|
*/
|
|
|
|
int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm)
|
|
|
|
{
|
2010-12-22 11:01:19 +08:00
|
|
|
int ret = -EINVAL;
|
|
|
|
|
[ARM] OMAP3 pwrdm: add hardware save-and-restore (SAR) support
OMAP3430ES2+ introduces a new feature: optional powerdomain context
hardware save-and-restore (SAR). Currently, this feature only applies
to USBHOST and USBTLL module context when the USBHOST or CORE
powerdomains enter a low-power sleep state[1]. This feature avoids
re-enumeration of USB devices when the powerdomains return from idle,
which is potentially time-consuming.
This patch adds support for enabling and disabling hardware
save-and-restore to the powerdomain code. Three new functions are
added, pwrdm_enable_hdwr_sar(), pwrdm_disable_hdwr_sar(), and
pwrdm_can_hdwr_sar(). A new struct powerdomain "flags" field is
added, with a PWRDM_HAS_HDWR_SAR flag to indicate powerdomains with
SAR support.
Thanks to Jouni Högander <jouni.hogander@nokia.com> for reviewing an
earlier version of these patches, and Richard Woodruff <r-woodruff2@ti.com>
for clarifying the purpose of these bits.
1. For the USBHOST controller module, context loss occurs when the
USBHOST powerdomain enters off-idle. For USBTLL, context loss
occurs either if CORE enters off-idle, or if the CORE logic is
configured to turn off when CORE enters retention-idle (OSWR).
34xx ES2 TRM 4.8.6.1.1, 4.8.6.1.2
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-26 08:09:37 +08:00
|
|
|
if (!pwrdm)
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
[ARM] OMAP3 pwrdm: add hardware save-and-restore (SAR) support
OMAP3430ES2+ introduces a new feature: optional powerdomain context
hardware save-and-restore (SAR). Currently, this feature only applies
to USBHOST and USBTLL module context when the USBHOST or CORE
powerdomains enter a low-power sleep state[1]. This feature avoids
re-enumeration of USB devices when the powerdomains return from idle,
which is potentially time-consuming.
This patch adds support for enabling and disabling hardware
save-and-restore to the powerdomain code. Three new functions are
added, pwrdm_enable_hdwr_sar(), pwrdm_disable_hdwr_sar(), and
pwrdm_can_hdwr_sar(). A new struct powerdomain "flags" field is
added, with a PWRDM_HAS_HDWR_SAR flag to indicate powerdomains with
SAR support.
Thanks to Jouni Högander <jouni.hogander@nokia.com> for reviewing an
earlier version of these patches, and Richard Woodruff <r-woodruff2@ti.com>
for clarifying the purpose of these bits.
1. For the USBHOST controller module, context loss occurs when the
USBHOST powerdomain enters off-idle. For USBTLL, context loss
occurs either if CORE enters off-idle, or if the CORE logic is
configured to turn off when CORE enters retention-idle (OSWR).
34xx ES2 TRM 4.8.6.1.1, 4.8.6.1.2
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-26 08:09:37 +08:00
|
|
|
|
|
|
|
if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR))
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
[ARM] OMAP3 pwrdm: add hardware save-and-restore (SAR) support
OMAP3430ES2+ introduces a new feature: optional powerdomain context
hardware save-and-restore (SAR). Currently, this feature only applies
to USBHOST and USBTLL module context when the USBHOST or CORE
powerdomains enter a low-power sleep state[1]. This feature avoids
re-enumeration of USB devices when the powerdomains return from idle,
which is potentially time-consuming.
This patch adds support for enabling and disabling hardware
save-and-restore to the powerdomain code. Three new functions are
added, pwrdm_enable_hdwr_sar(), pwrdm_disable_hdwr_sar(), and
pwrdm_can_hdwr_sar(). A new struct powerdomain "flags" field is
added, with a PWRDM_HAS_HDWR_SAR flag to indicate powerdomains with
SAR support.
Thanks to Jouni Högander <jouni.hogander@nokia.com> for reviewing an
earlier version of these patches, and Richard Woodruff <r-woodruff2@ti.com>
for clarifying the purpose of these bits.
1. For the USBHOST controller module, context loss occurs when the
USBHOST powerdomain enters off-idle. For USBTLL, context loss
occurs either if CORE enters off-idle, or if the CORE logic is
configured to turn off when CORE enters retention-idle (OSWR).
34xx ES2 TRM 4.8.6.1.1, 4.8.6.1.2
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-26 08:09:37 +08:00
|
|
|
|
2012-07-26 14:54:26 +08:00
|
|
|
pr_debug("powerdomain: %s: clearing SAVEANDRESTORE bit\n", pwrdm->name);
|
[ARM] OMAP3 pwrdm: add hardware save-and-restore (SAR) support
OMAP3430ES2+ introduces a new feature: optional powerdomain context
hardware save-and-restore (SAR). Currently, this feature only applies
to USBHOST and USBTLL module context when the USBHOST or CORE
powerdomains enter a low-power sleep state[1]. This feature avoids
re-enumeration of USB devices when the powerdomains return from idle,
which is potentially time-consuming.
This patch adds support for enabling and disabling hardware
save-and-restore to the powerdomain code. Three new functions are
added, pwrdm_enable_hdwr_sar(), pwrdm_disable_hdwr_sar(), and
pwrdm_can_hdwr_sar(). A new struct powerdomain "flags" field is
added, with a PWRDM_HAS_HDWR_SAR flag to indicate powerdomains with
SAR support.
Thanks to Jouni Högander <jouni.hogander@nokia.com> for reviewing an
earlier version of these patches, and Richard Woodruff <r-woodruff2@ti.com>
for clarifying the purpose of these bits.
1. For the USBHOST controller module, context loss occurs when the
USBHOST powerdomain enters off-idle. For USBTLL, context loss
occurs either if CORE enters off-idle, or if the CORE logic is
configured to turn off when CORE enters retention-idle (OSWR).
34xx ES2 TRM 4.8.6.1.1, 4.8.6.1.2
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-26 08:09:37 +08:00
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|
|
|
2010-12-22 11:01:19 +08:00
|
|
|
if (arch_pwrdm && arch_pwrdm->pwrdm_disable_hdwr_sar)
|
|
|
|
ret = arch_pwrdm->pwrdm_disable_hdwr_sar(pwrdm);
|
[ARM] OMAP3 pwrdm: add hardware save-and-restore (SAR) support
OMAP3430ES2+ introduces a new feature: optional powerdomain context
hardware save-and-restore (SAR). Currently, this feature only applies
to USBHOST and USBTLL module context when the USBHOST or CORE
powerdomains enter a low-power sleep state[1]. This feature avoids
re-enumeration of USB devices when the powerdomains return from idle,
which is potentially time-consuming.
This patch adds support for enabling and disabling hardware
save-and-restore to the powerdomain code. Three new functions are
added, pwrdm_enable_hdwr_sar(), pwrdm_disable_hdwr_sar(), and
pwrdm_can_hdwr_sar(). A new struct powerdomain "flags" field is
added, with a PWRDM_HAS_HDWR_SAR flag to indicate powerdomains with
SAR support.
Thanks to Jouni Högander <jouni.hogander@nokia.com> for reviewing an
earlier version of these patches, and Richard Woodruff <r-woodruff2@ti.com>
for clarifying the purpose of these bits.
1. For the USBHOST controller module, context loss occurs when the
USBHOST powerdomain enters off-idle. For USBTLL, context loss
occurs either if CORE enters off-idle, or if the CORE logic is
configured to turn off when CORE enters retention-idle (OSWR).
34xx ES2 TRM 4.8.6.1.1, 4.8.6.1.2
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-26 08:09:37 +08:00
|
|
|
|
2010-12-22 11:01:19 +08:00
|
|
|
return ret;
|
[ARM] OMAP3 pwrdm: add hardware save-and-restore (SAR) support
OMAP3430ES2+ introduces a new feature: optional powerdomain context
hardware save-and-restore (SAR). Currently, this feature only applies
to USBHOST and USBTLL module context when the USBHOST or CORE
powerdomains enter a low-power sleep state[1]. This feature avoids
re-enumeration of USB devices when the powerdomains return from idle,
which is potentially time-consuming.
This patch adds support for enabling and disabling hardware
save-and-restore to the powerdomain code. Three new functions are
added, pwrdm_enable_hdwr_sar(), pwrdm_disable_hdwr_sar(), and
pwrdm_can_hdwr_sar(). A new struct powerdomain "flags" field is
added, with a PWRDM_HAS_HDWR_SAR flag to indicate powerdomains with
SAR support.
Thanks to Jouni Högander <jouni.hogander@nokia.com> for reviewing an
earlier version of these patches, and Richard Woodruff <r-woodruff2@ti.com>
for clarifying the purpose of these bits.
1. For the USBHOST controller module, context loss occurs when the
USBHOST powerdomain enters off-idle. For USBTLL, context loss
occurs either if CORE enters off-idle, or if the CORE logic is
configured to turn off when CORE enters retention-idle (OSWR).
34xx ES2 TRM 4.8.6.1.1, 4.8.6.1.2
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-26 08:09:37 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pwrdm_has_hdwr_sar - test whether powerdomain supports hardware SAR
|
|
|
|
* @pwrdm: struct powerdomain *
|
|
|
|
*
|
2010-01-27 11:13:02 +08:00
|
|
|
* Returns 1 if powerdomain @pwrdm supports hardware save-and-restore
|
[ARM] OMAP3 pwrdm: add hardware save-and-restore (SAR) support
OMAP3430ES2+ introduces a new feature: optional powerdomain context
hardware save-and-restore (SAR). Currently, this feature only applies
to USBHOST and USBTLL module context when the USBHOST or CORE
powerdomains enter a low-power sleep state[1]. This feature avoids
re-enumeration of USB devices when the powerdomains return from idle,
which is potentially time-consuming.
This patch adds support for enabling and disabling hardware
save-and-restore to the powerdomain code. Three new functions are
added, pwrdm_enable_hdwr_sar(), pwrdm_disable_hdwr_sar(), and
pwrdm_can_hdwr_sar(). A new struct powerdomain "flags" field is
added, with a PWRDM_HAS_HDWR_SAR flag to indicate powerdomains with
SAR support.
Thanks to Jouni Högander <jouni.hogander@nokia.com> for reviewing an
earlier version of these patches, and Richard Woodruff <r-woodruff2@ti.com>
for clarifying the purpose of these bits.
1. For the USBHOST controller module, context loss occurs when the
USBHOST powerdomain enters off-idle. For USBTLL, context loss
occurs either if CORE enters off-idle, or if the CORE logic is
configured to turn off when CORE enters retention-idle (OSWR).
34xx ES2 TRM 4.8.6.1.1, 4.8.6.1.2
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-06-26 08:09:37 +08:00
|
|
|
* for some devices, or 0 if it does not.
|
|
|
|
*/
|
|
|
|
bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm)
|
|
|
|
{
|
|
|
|
return (pwrdm && pwrdm->flags & PWRDM_HAS_HDWR_SAR) ? 1 : 0;
|
|
|
|
}
|
|
|
|
|
2013-01-26 15:58:16 +08:00
|
|
|
int pwrdm_state_switch_nolock(struct powerdomain *pwrdm)
|
2008-10-15 22:48:43 +08:00
|
|
|
{
|
2012-03-12 22:34:32 +08:00
|
|
|
int ret;
|
|
|
|
|
2013-01-26 15:58:15 +08:00
|
|
|
if (!pwrdm || !arch_pwrdm)
|
|
|
|
return -EINVAL;
|
|
|
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|
|
ret = arch_pwrdm->pwrdm_wait_transition(pwrdm);
|
2012-03-12 22:34:32 +08:00
|
|
|
if (!ret)
|
|
|
|
ret = _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW);
|
|
|
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return ret;
|
2008-10-15 22:48:43 +08:00
|
|
|
}
|
|
|
|
|
2013-01-26 15:58:16 +08:00
|
|
|
int __deprecated pwrdm_state_switch(struct powerdomain *pwrdm)
|
|
|
|
{
|
|
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|
int ret;
|
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|
pwrdm_lock(pwrdm);
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ret = pwrdm_state_switch_nolock(pwrdm);
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pwrdm_unlock(pwrdm);
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return ret;
|
|
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|
}
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|
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2012-05-12 07:00:24 +08:00
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int pwrdm_pre_transition(struct powerdomain *pwrdm)
|
2008-10-15 22:48:43 +08:00
|
|
|
{
|
2012-05-12 07:00:24 +08:00
|
|
|
if (pwrdm)
|
|
|
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_pwrdm_pre_transition_cb(pwrdm, NULL);
|
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else
|
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pwrdm_for_each(_pwrdm_pre_transition_cb, NULL);
|
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|
2008-10-15 22:48:43 +08:00
|
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|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-05-12 07:00:24 +08:00
|
|
|
int pwrdm_post_transition(struct powerdomain *pwrdm)
|
2008-10-15 22:48:43 +08:00
|
|
|
{
|
2012-05-12 07:00:24 +08:00
|
|
|
if (pwrdm)
|
|
|
|
_pwrdm_post_transition_cb(pwrdm, NULL);
|
|
|
|
else
|
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|
|
pwrdm_for_each(_pwrdm_post_transition_cb, NULL);
|
|
|
|
|
2008-10-15 22:48:43 +08:00
|
|
|
return 0;
|
|
|
|
}
|
2010-12-22 12:31:55 +08:00
|
|
|
|
2013-01-30 04:45:09 +08:00
|
|
|
/**
|
|
|
|
* omap_set_pwrdm_state - change a powerdomain's current power state
|
|
|
|
* @pwrdm: struct powerdomain * to change the power state of
|
|
|
|
* @pwrst: power state to change to
|
|
|
|
*
|
|
|
|
* Change the current hardware power state of the powerdomain
|
|
|
|
* represented by @pwrdm to the power state represented by @pwrst.
|
|
|
|
* Returns -EINVAL if @pwrdm is null or invalid or if the
|
|
|
|
* powerdomain's current power state could not be read, or returns 0
|
|
|
|
* upon success or if @pwrdm does not support @pwrst or any
|
|
|
|
* lower-power state. XXX Should not return 0 if the @pwrdm does not
|
|
|
|
* support @pwrst or any lower-power state: this should be an error.
|
|
|
|
*/
|
|
|
|
int omap_set_pwrdm_state(struct powerdomain *pwrdm, u8 pwrst)
|
|
|
|
{
|
2013-04-01 10:22:22 +08:00
|
|
|
u8 next_pwrst, sleep_switch;
|
|
|
|
int curr_pwrst;
|
2013-01-30 04:45:09 +08:00
|
|
|
int ret = 0;
|
|
|
|
bool hwsup = false;
|
|
|
|
|
|
|
|
if (!pwrdm || IS_ERR(pwrdm))
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
while (!(pwrdm->pwrsts & (1 << pwrst))) {
|
|
|
|
if (pwrst == PWRDM_POWER_OFF)
|
|
|
|
return ret;
|
|
|
|
pwrst--;
|
|
|
|
}
|
|
|
|
|
2013-01-26 15:58:16 +08:00
|
|
|
pwrdm_lock(pwrdm);
|
|
|
|
|
2013-01-30 04:45:09 +08:00
|
|
|
curr_pwrst = pwrdm_read_pwrst(pwrdm);
|
2013-04-01 10:22:22 +08:00
|
|
|
if (curr_pwrst < 0) {
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto osps_out;
|
|
|
|
}
|
|
|
|
|
2013-01-30 04:45:09 +08:00
|
|
|
next_pwrst = pwrdm_read_next_pwrst(pwrdm);
|
|
|
|
if (curr_pwrst == pwrst && next_pwrst == pwrst)
|
2013-01-26 15:58:16 +08:00
|
|
|
goto osps_out;
|
2013-01-30 04:45:09 +08:00
|
|
|
|
|
|
|
sleep_switch = _pwrdm_save_clkdm_state_and_activate(pwrdm, curr_pwrst,
|
|
|
|
pwrst, &hwsup);
|
|
|
|
|
|
|
|
ret = pwrdm_set_next_pwrst(pwrdm, pwrst);
|
|
|
|
if (ret)
|
|
|
|
pr_err("%s: unable to set power state of powerdomain: %s\n",
|
|
|
|
__func__, pwrdm->name);
|
|
|
|
|
|
|
|
_pwrdm_restore_clkdm_state(pwrdm, sleep_switch, hwsup);
|
|
|
|
|
2013-01-26 15:58:16 +08:00
|
|
|
osps_out:
|
|
|
|
pwrdm_unlock(pwrdm);
|
|
|
|
|
2013-01-30 04:45:09 +08:00
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2010-12-22 12:31:55 +08:00
|
|
|
/**
|
|
|
|
* pwrdm_get_context_loss_count - get powerdomain's context loss count
|
|
|
|
* @pwrdm: struct powerdomain * to wait for
|
|
|
|
*
|
|
|
|
* Context loss count is the sum of powerdomain off-mode counter, the
|
2011-06-09 21:56:23 +08:00
|
|
|
* logic off counter and the per-bank memory off counter. Returns negative
|
2010-12-22 12:31:55 +08:00
|
|
|
* (and WARNs) upon error, otherwise, returns the context loss count.
|
|
|
|
*/
|
2011-06-09 21:56:23 +08:00
|
|
|
int pwrdm_get_context_loss_count(struct powerdomain *pwrdm)
|
2010-12-22 12:31:55 +08:00
|
|
|
{
|
|
|
|
int i, count;
|
|
|
|
|
|
|
|
if (!pwrdm) {
|
|
|
|
WARN(1, "powerdomain: %s: pwrdm is null\n", __func__);
|
2011-06-09 21:56:23 +08:00
|
|
|
return -ENODEV;
|
2010-12-22 12:31:55 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
count = pwrdm->state_counter[PWRDM_POWER_OFF];
|
|
|
|
count += pwrdm->ret_logic_off_counter;
|
|
|
|
|
|
|
|
for (i = 0; i < pwrdm->banks; i++)
|
|
|
|
count += pwrdm->ret_mem_off_counter[i];
|
|
|
|
|
2011-06-09 21:56:23 +08:00
|
|
|
/*
|
|
|
|
* Context loss count has to be a non-negative value. Clear the sign
|
|
|
|
* bit to get a value range from 0 to INT_MAX.
|
|
|
|
*/
|
|
|
|
count &= INT_MAX;
|
|
|
|
|
|
|
|
pr_debug("powerdomain: %s: context loss count = %d\n",
|
2010-12-22 12:31:55 +08:00
|
|
|
pwrdm->name, count);
|
|
|
|
|
|
|
|
return count;
|
|
|
|
}
|
2011-03-08 10:28:15 +08:00
|
|
|
|
|
|
|
/**
|
|
|
|
* pwrdm_can_ever_lose_context - can this powerdomain ever lose context?
|
|
|
|
* @pwrdm: struct powerdomain *
|
|
|
|
*
|
|
|
|
* Given a struct powerdomain * @pwrdm, returns 1 if the powerdomain
|
|
|
|
* can lose either memory or logic context or if @pwrdm is invalid, or
|
|
|
|
* returns 0 otherwise. This function is not concerned with how the
|
|
|
|
* powerdomain registers are programmed (i.e., to go off or not); it's
|
|
|
|
* concerned with whether it's ever possible for this powerdomain to
|
|
|
|
* go off while some other part of the chip is active. This function
|
|
|
|
* assumes that every powerdomain can go to either ON or INACTIVE.
|
|
|
|
*/
|
|
|
|
bool pwrdm_can_ever_lose_context(struct powerdomain *pwrdm)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
2013-02-24 18:55:24 +08:00
|
|
|
if (!pwrdm) {
|
2011-03-08 10:28:15 +08:00
|
|
|
pr_debug("powerdomain: %s: invalid powerdomain pointer\n",
|
|
|
|
__func__);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (pwrdm->pwrsts & PWRSTS_OFF)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
if (pwrdm->pwrsts & PWRSTS_RET) {
|
|
|
|
if (pwrdm->pwrsts_logic_ret & PWRSTS_OFF)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
for (i = 0; i < pwrdm->banks; i++)
|
|
|
|
if (pwrdm->pwrsts_mem_ret[i] & PWRSTS_OFF)
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < pwrdm->banks; i++)
|
|
|
|
if (pwrdm->pwrsts_mem_on[i] & PWRSTS_OFF)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|