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 <[e-mail]>
Acked-by: Jon Hunter <[e-mail]>
Signed-off-by: Dmitry Baryshkov <[e-mail]>
Reviewed-by: Bjorn Andersson <[e-mail]>
Acked-by: MyungJoo Ham <[e-mail]>
Signed-off-by: Chanwoo Choi <[e-mail]>
Link: https://patchwork.kernel.org/project/linux-pm/patch/[e-mail]/

drivers/devfreq/devfreq.c

···
 #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>
···
 #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>

drivers/devfreq/governor.h include/linux/devfreq-governor.h

···
  * Copyright (C) 2011 Samsung Electronics
  *	MyungJoo Ham <[e-mail]>
  *
- * 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>
 
···
  */
 #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
···
 
 	return df->profile->get_dev_status(df->dev.parent, &df->last_status);
 }
-#endif /* _GOVERNOR_H */
+#endif /* __LINUX_DEVFREQ_DEVFREQ_H__ */

drivers/devfreq/governor_passive.c

···
 #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,

drivers/devfreq/governor_performance.c

···
  */
 
 #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)

drivers/devfreq/governor_powersave.c

···
  */
 
 #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)

drivers/devfreq/governor_simpleondemand.c

···
 #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)

drivers/devfreq/governor_userspace.c

···
 #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;

drivers/devfreq/hisi_uncore_freq.c

···
 #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>
···
 #include <linux/topology.h>
 #include <linux/units.h>
 #include <acpi/pcc.h>
-
-#include "governor.h"
 
 struct hisi_uncore_pcc_data {
 	u16 status;

drivers/devfreq/tegra30-devfreq.c

···
 #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>
···
 #include <linux/workqueue.h>
 
 #include <soc/tegra/fuse.h>
-
-#include "governor.h"
 
 #define ACTMON_GLB_STATUS					0x0
 #define ACTMON_GLB_PERIOD_CTRL					0x4