linux-toradex.git/include/linux/cpuidle.h, branch v4.11-rc3

cpuidle:powernv: Add helper function to populate powernv idle states.

2017-01-30T21:32:13+00:00

In the current code for powernv_add_idle_states, there is a lot of code
duplication while initializing an idle state in powernv_states table.

Add an inline helper function to populate the powernv_states[] table
for a given idle state. Invoke this for populating the "Nap",
"Fastsleep" and the stop states in powernv_add_idle_states.

Signed-off-by: Gautham R. Shenoy 
Acked-by: Balbir Singh 
Acked-by: Rafael J. Wysocki 
Signed-off-by: Michael Ellerman

cpuidle: Allow enforcing deepest idle state selection

2016-11-29T13:02:21+00:00

When idle injection is used to cap power, we need to override the
governor's choice of idle states.

For this reason, make it possible the deepest idle state selection to
be enforced by setting a flag on a given CPU to achieve the maximum
potential power draw reduction.

Signed-off-by: Jacob Pan 
[ rjw: Subject & changelog ]
Signed-off-by: Rafael J. Wysocki

cpuidle: governors: Remove remaining old module code

2016-10-21T12:49:51+00:00

The governor's code use try_module_get() and put_module() to refcount
the governor's module. But the governors are not compiled as module.

The refcount does not prevent to switch the governor or unload
a module as they aren't compiled as modules. The code is pointless,
so remove it.

Signed-off-by: Daniel Lezcano 
Signed-off-by: Rafael J. Wysocki

cpuidle: introduce CPU_PM_CPU_IDLE_ENTER macro for ARM{32, 64}

2016-07-21T21:29:38+00:00

The function arm_enter_idle_state is exactly the same in both generic
ARM{32,64} CPUIdle driver and will be the same even on ARM64 backend
for ACPI processor idle driver. So we can unify it and move it to a
common place by introducing CPU_PM_CPU_IDLE_ENTER macro that can be
used in all places avoiding duplication.

This is in preparation of reuse of the generic cpuidle entry function
for ACPI LPI support on ARM64.

Suggested-by: Rafael J. Wysocki 
Signed-off-by: Sudeep Holla 
Signed-off-by: Rafael J. Wysocki

cpuidle: Do not access cpuidle_devices when !CONFIG_CPU_IDLE

2016-06-02T21:05:27+00:00

The cpuidle_devices per-CPU variable is only defined when CPU_IDLE is
enabled. Commit c8cc7d4de7a4 ("sched/idle: Reorganize the idle loop")
removed the #ifdef CONFIG_CPU_IDLE around cpuidle_idle_call() with the
compiler optimising away __this_cpu_read(cpuidle_devices). However, with
CONFIG_UBSAN && !CONFIG_CPU_IDLE, this optimisation no longer happens
and the kernel fails to link since cpuidle_devices is not defined.

This patch introduces an accessor function for the current CPU cpuidle
device (returning NULL when !CONFIG_CPU_IDLE) and uses it in
cpuidle_idle_call().

Signed-off-by: Catalin Marinas 
Cc: 4.5+  # 4.5+
Signed-off-by: Rafael J. Wysocki

cpuidle/coupled: Remove cpuidle_device::safe_state_index

2015-08-28T13:14:54+00:00

cpuidle_device::safe_state_index need to be initialized before
use, it should be the same as cpuidle_driver::safe_state_index.

We tackled this issue by removing the safe_state_index from the
cpuidle_device structure and use the one in the cpuidle_driver
structure instead.

Suggested-by: Daniel Lezcano 
Signed-off-by: Xunlei Pang 
Signed-off-by: Rafael J. Wysocki

Merge branches 'pm-sleep' and 'pm-runtime'

2015-06-18T23:18:02+00:00

* pm-sleep:
  PM / sleep: trace_device_pm_callback coverage in dpm_prepare/complete
  PM / wakeup: add a dummy wakeup_source to record statistics
  PM / sleep: Make suspend-to-idle-specific code depend on CONFIG_SUSPEND
  PM / sleep: Return -EBUSY from suspend_enter() on wakeup detection
  PM / tick: Add tracepoints for suspend-to-idle diagnostics
  PM / sleep: Fix symbol name in a comment in kernel/power/main.c
  leds / PM: fix hibernation on arm when gpio-led used with CPU led trigger
  ARM: omap-device: use SET_NOIRQ_SYSTEM_SLEEP_PM_OPS
  bus: omap_l3_noc: add missed callbacks for suspend-to-disk
  PM / sleep: Add macro to define common noirq system PM callbacks
  PM / sleep: Refine diagnostic messages in enter_state()
  PM / wakeup: validate wakeup source before activating it.

* pm-runtime:
  PM / Runtime: Update last_busy in rpm_resume
  PM / runtime: add note about re-calling in during device probe()

PM / sleep: Make suspend-to-idle-specific code depend on CONFIG_SUSPEND

2015-05-19T00:44:24+00:00

Since idle_should_freeze() is defined to always return 'false'
for CONFIG_SUSPEND unset, all of the code depending on it in
cpuidle_idle_call() is not necessary in that case.

Make that code depend on CONFIG_SUSPEND too to avoid building it
when it is not going to be used.

Signed-off-by: Rafael J. Wysocki 
Acked-by: Thomas Gleixner

sched / idle: Call default_idle_call() from cpuidle_enter_state()

2015-05-14T19:37:47+00:00

The check of the cpuidle_enter() return value against -EBUSY
made in call_cpuidle() will not be necessary any more if
cpuidle_enter_state() calls default_idle_call() directly when it
is about to return -EBUSY, so make that happen and eliminate the
check.

Signed-off-by: Rafael J. Wysocki 
Reviewed-by: Preeti U Murthy 
Tested-by: Preeti U Murthy 
Tested-by: Sudeep Holla 
Acked-by: Kevin Hilman

sched / idle: Call idle_set_state() from cpuidle_enter_state()

2015-05-14T19:35:10+00:00

Introduce a wrapper function around idle_set_state() called
sched_idle_set_state() that will pass this_rq() to it as the
first argument and make cpuidle_enter_state() call the new
function before and after entering the target state.

At the same time, remove direct invocations of idle_set_state()
from call_cpuidle().

This will allow the invocation of default_idle_call() to be
moved from call_cpuidle() to cpuidle_enter_state() safely
and call_cpuidle() to be simplified a bit as a result.

Signed-off-by: Rafael J. Wysocki 
Reviewed-by: Preeti U Murthy 
Tested-by: Preeti U Murthy 
Tested-by: Sudeep Holla 
Acked-by: Kevin Hilman