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PM / devfreq: Move governor.h to a public header location 

Some device drivers (and out-of-tree modules) might want to define
device-specific device governors. Rather than restricting all of them to
be a part of drivers/devfreq/ (which is not possible for out-of-tree
drivers anyway) move governor.h to include/linux/devfreq-governor.h and
update all drivers to use it.

The devfreq_cpu_data is only used internally, by the passive governor,
so it is moved to the driver source rather than being a part of the
public interface.

Reported-by: Robie Basak <robibasa@qti.qualcomm.com>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Link: https://patchwork.kernel.org/project/linux-pm/patch/20251030-governor-public-v2-1-432a11a9975a@oss.qualcomm.com/
pull/1354/merge
Dmitry Baryshkov 2025-10-30 20:26:28 +02:00 committed by Chanwoo Choi
parent 6146a0f1df
commit 447c4e8338
9 changed files with 37 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/devfreq/devfreq.c
View File

@ -20,6 +20,7 @@
#include <linux/stat.h>
#include <linux/pm_opp.h>
#include <linux/devfreq.h>
#include <linux/devfreq-governor.h>
#include <linux/workqueue.h>
#include <linux/platform_device.h>
#include <linux/list.h>
@ -28,7 +29,6 @@
#include <linux/of.h>
#include <linux/pm_qos.h>
#include <linux/units.h>
#include "governor.h"
#define CREATE_TRACE_POINTS
#include <trace/events/devfreq.h>

27
drivers/devfreq/governor_passive.c
View File

@ -14,8 +14,33 @@
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/devfreq.h>
#include <linux/devfreq-governor.h>
#include <linux/units.h>
#include "governor.h"
/**
* struct devfreq_cpu_data - Hold the per-cpu data
* @node: list node
* @dev: reference to cpu device.
* @first_cpu: the cpumask of the first cpu of a policy.
* @opp_table: reference to cpu opp table.
* @cur_freq: the current frequency of the cpu.
* @min_freq: the min frequency of the cpu.
* @max_freq: the max frequency of the cpu.
*
* This structure stores the required cpu_data of a cpu.
* This is auto-populated by the governor.
*/
struct devfreq_cpu_data {
struct list_head node;
struct device *dev;
unsigned int first_cpu;
struct opp_table *opp_table;
unsigned int cur_freq;
unsigned int min_freq;
unsigned int max_freq;
};
static struct devfreq_cpu_data *
get_parent_cpu_data(struct devfreq_passive_data *p_data,

2
drivers/devfreq/governor_performance.c
View File

@ -7,8 +7,8 @@
*/
#include <linux/devfreq.h>
#include <linux/devfreq-governor.h>
#include <linux/module.h>
#include "governor.h"
static int devfreq_performance_func(struct devfreq *df,
unsigned long *freq)

2
drivers/devfreq/governor_powersave.c
View File

@ -7,8 +7,8 @@
*/
#include <linux/devfreq.h>
#include <linux/devfreq-governor.h>
#include <linux/module.h>
#include "governor.h"
static int devfreq_powersave_func(struct devfreq *df,
unsigned long *freq)

2
drivers/devfreq/governor_simpleondemand.c
View File

@ -9,8 +9,8 @@
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/devfreq.h>
#include <linux/devfreq-governor.h>
#include <linux/math64.h>
#include "governor.h"
/* Default constants for DevFreq-Simple-Ondemand (DFSO) */
#define DFSO_UPTHRESHOLD (90)

2
drivers/devfreq/governor_userspace.c
View File

@ -9,11 +9,11 @@
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/devfreq.h>
#include <linux/devfreq-governor.h>
#include <linux/kstrtox.h>
#include <linux/pm.h>
#include <linux/mutex.h>
#include <linux/module.h>
#include "governor.h"
struct userspace_data {
unsigned long user_frequency;

3
drivers/devfreq/hisi_uncore_freq.c
View File

@ -9,6 +9,7 @@
#include <linux/bits.h>
#include <linux/cleanup.h>
#include <linux/devfreq.h>
#include <linux/devfreq-governor.h>
#include <linux/device.h>
#include <linux/dev_printk.h>
#include <linux/errno.h>
@ -26,8 +27,6 @@
#include <linux/units.h>
#include <acpi/pcc.h>
#include "governor.h"
struct hisi_uncore_pcc_data {
u16 status;
u16 resv;

3
drivers/devfreq/tegra30-devfreq.c
View File

@ -9,6 +9,7 @@
#include <linux/clk.h>
#include <linux/cpufreq.h>
#include <linux/devfreq.h>
#include <linux/devfreq-governor.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/irq.h>
@ -21,8 +22,6 @@
#include <soc/tegra/fuse.h>
#include "governor.h"
#define ACTMON_GLB_STATUS 0x0
#define ACTMON_GLB_PERIOD_CTRL 0x4

33
drivers/devfreq/governor.h → include/linux/devfreq-governor.h
View File

@ -5,11 +5,11 @@
* Copyright (C) 2011 Samsung Electronics
* MyungJoo Ham <myungjoo.ham@samsung.com>
*
* This header is for devfreq governors in drivers/devfreq/
* This header is for devfreq governors
*/
#ifndef _GOVERNOR_H
#define _GOVERNOR_H
#ifndef __LINUX_DEVFREQ_DEVFREQ_H__
#define __LINUX_DEVFREQ_DEVFREQ_H__
#include <linux/devfreq.h>
@ -47,31 +47,6 @@
#define DEVFREQ_GOV_ATTR_POLLING_INTERVAL BIT(0)
#define DEVFREQ_GOV_ATTR_TIMER BIT(1)
/**
* struct devfreq_cpu_data - Hold the per-cpu data
* @node: list node
* @dev: reference to cpu device.
* @first_cpu: the cpumask of the first cpu of a policy.
* @opp_table: reference to cpu opp table.
* @cur_freq: the current frequency of the cpu.
* @min_freq: the min frequency of the cpu.
* @max_freq: the max frequency of the cpu.
*
* This structure stores the required cpu_data of a cpu.
* This is auto-populated by the governor.
*/
struct devfreq_cpu_data {
struct list_head node;
struct device *dev;
unsigned int first_cpu;
struct opp_table *opp_table;
unsigned int cur_freq;
unsigned int min_freq;
unsigned int max_freq;
};
/**
* struct devfreq_governor - Devfreq policy governor
* @node: list node - contains registered devfreq governors
@ -124,4 +99,4 @@ static inline int devfreq_update_stats(struct devfreq *df)
return df->profile->get_dev_status(df->dev.parent, &df->last_status);
}
#endif /* _GOVERNOR_H */
#endif /* __LINUX_DEVFREQ_DEVFREQ_H__ */