linux/drivers/pmdomain/governor.c

// SPDX-License-Identifier: GPL-2.0
/*
 * drivers/base/power/domain_governor.c - Governors for device PM domains.
 *
 * Copyright (C) 2011 Rafael J. Wysocki <[email protected]>, Renesas Electronics Corp.
 */
#include <linux/kernel.h>
#include <linux/pm_domain.h>
#include <linux/pm_qos.h>
#include <linux/hrtimer.h>
#include <linux/cpuidle.h>
#include <linux/cpumask.h>
#include <linux/ktime.h>

static int dev_update_qos_constraint(struct device *dev, void *data)
{ … }

/**
 * default_suspend_ok - Default PM domain governor routine to suspend devices.
 * @dev: Device to check.
 *
 * Returns: true if OK to suspend, false if not OK to suspend
 */
static bool default_suspend_ok(struct device *dev)
{ … }

static void update_domain_next_wakeup(struct generic_pm_domain *genpd, ktime_t now)
{ … }

static bool next_wakeup_allows_state(struct generic_pm_domain *genpd,
				     unsigned int state, ktime_t now)
{ … }

static bool __default_power_down_ok(struct dev_pm_domain *pd,
				     unsigned int state)
{ … }

/**
 * _default_power_down_ok - Default generic PM domain power off governor routine.
 * @pd: PM domain to check.
 * @now: current ktime.
 *
 * This routine must be executed under the PM domain's lock.
 *
 * Returns: true if OK to power down, false if not OK to power down
 */
static bool _default_power_down_ok(struct dev_pm_domain *pd, ktime_t now)
{ … }

static bool default_power_down_ok(struct dev_pm_domain *pd)
{ … }

#ifdef CONFIG_CPU_IDLE
static bool cpu_power_down_ok(struct dev_pm_domain *pd)
{ … }

struct dev_power_governor pm_domain_cpu_gov = …;
#endif

struct dev_power_governor simple_qos_governor = …;

/*
 * pm_domain_always_on_gov - A governor implementing an always-on policy
 */
struct dev_power_governor pm_domain_always_on_gov = …;