thermal/drivers/core: Use governor table to initialize

Now that the governor table is in place and the macro allows to browse the
table, declare the governor so the entry is added in the governor table
in the init section.

The [un]register_thermal_governors function does no longer need to use the
exported [un]register thermal governor's specific function which in turn
call the [un]register_thermal_governor. The governors are fully
self-encapsulated.

The cyclic dependency is no longer needed, remove it.

Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

7 files changed, 34 insertions, 115 deletions

diff --git a/drivers/thermal/fair_share.c b/drivers/thermal/fair_share.c
index 8ff109fb77e1..afd99f668c65 100644
--- a/drivers/thermal/fair_share.c
+++ b/drivers/thermal/fair_share.c
@@ -117,14 +117,4 @@ static struct thermal_governor thermal_gov_fair_share = {
 	.name		= "fair_share",
 	.throttle	= fair_share_throttle,
 };
-
-int thermal_gov_fair_share_register(void)
-{
-	return thermal_register_governor(&thermal_gov_fair_share);
-}
-
-void thermal_gov_fair_share_unregister(void)
-{
-	thermal_unregister_governor(&thermal_gov_fair_share);
-}
-
+THERMAL_GOVERNOR_DECLARE(thermal_gov_fair_share);
diff --git a/drivers/thermal/gov_bang_bang.c b/drivers/thermal/gov_bang_bang.c
index 632fb925e975..e0575d29023a 100644
--- a/drivers/thermal/gov_bang_bang.c
+++ b/drivers/thermal/gov_bang_bang.c
@@ -116,13 +116,4 @@ static struct thermal_governor thermal_gov_bang_bang = {
 	.name		= "bang_bang",
 	.throttle	= bang_bang_control,
 };
-
-int thermal_gov_bang_bang_register(void)
-{
-	return thermal_register_governor(&thermal_gov_bang_bang);
-}
-
-void thermal_gov_bang_bang_unregister(void)
-{
-	thermal_unregister_governor(&thermal_gov_bang_bang);
-}
+THERMAL_GOVERNOR_DECLARE(thermal_gov_bang_bang);
diff --git a/drivers/thermal/power_allocator.c b/drivers/thermal/power_allocator.c
index 3055f9a12a17..44636475b2a3 100644
--- a/drivers/thermal/power_allocator.c
+++ b/drivers/thermal/power_allocator.c
@@ -651,13 +651,4 @@ static struct thermal_governor thermal_gov_power_allocator = {
 	.unbind_from_tz	= power_allocator_unbind,
 	.throttle	= power_allocator_throttle,
 };
-
-int thermal_gov_power_allocator_register(void)
-{
-	return thermal_register_governor(&thermal_gov_power_allocator);
-}
-
-void thermal_gov_power_allocator_unregister(void)
-{
-	thermal_unregister_governor(&thermal_gov_power_allocator);
-}
+THERMAL_GOVERNOR_DECLARE(thermal_gov_power_allocator);
diff --git a/drivers/thermal/step_wise.c b/drivers/thermal/step_wise.c
index 81a183befd48..6e051cbd824f 100644
--- a/drivers/thermal/step_wise.c
+++ b/drivers/thermal/step_wise.c
@@ -206,13 +206,4 @@ static struct thermal_governor thermal_gov_step_wise = {
 	.name		= "step_wise",
 	.throttle	= step_wise_throttle,
 };
-
-int thermal_gov_step_wise_register(void)
-{
-	return thermal_register_governor(&thermal_gov_step_wise);
-}
-
-void thermal_gov_step_wise_unregister(void)
-{
-	thermal_unregister_governor(&thermal_gov_step_wise);
-}
+THERMAL_GOVERNOR_DECLARE(thermal_gov_step_wise);
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 46cfb7de4eb2..6bab66e84eb5 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -243,36 +243,42 @@ int thermal_build_list_of_policies(char *buf)
 	return count;
 }
 
-static int __init thermal_register_governors(void)
+static void __init thermal_unregister_governors(void)
 {
-	int result;
+	struct thermal_governor **governor;
 
-	result = thermal_gov_step_wise_register();
-	if (result)
-		return result;
+	for_each_governor_table(governor)
+		thermal_unregister_governor(*governor);
+}
 
-	result = thermal_gov_fair_share_register();
-	if (result)
-		return result;
+static int __init thermal_register_governors(void)
+{
+	int ret = 0;
+	struct thermal_governor **governor;
 
-	result = thermal_gov_bang_bang_register();
-	if (result)
-		return result;
+	for_each_governor_table(governor) {
+		ret = thermal_register_governor(*governor);
+		if (ret) {
+			pr_err("Failed to register governor: '%s'",
+			       (*governor)->name);
+			break;
+		}
 
-	result = thermal_gov_user_space_register();
-	if (result)
-		return result;
+		pr_info("Registered thermal governor '%s'",
+			(*governor)->name);
+	}
 
-	return thermal_gov_power_allocator_register();
-}
+	if (ret) {
+		struct thermal_governor **gov;
 
-static void __init thermal_unregister_governors(void)
-{
-	thermal_gov_step_wise_unregister();
-	thermal_gov_fair_share_unregister();
-	thermal_gov_bang_bang_unregister();
-	thermal_gov_user_space_unregister();
-	thermal_gov_power_allocator_unregister();
+		for_each_governor_table(gov) {
+			if (gov == governor)
+				break;
+			thermal_unregister_governor(*gov);
+		}
+	}
+
+	return ret;
 }
 
 /*
diff --git a/drivers/thermal/thermal_core.h b/drivers/thermal/thermal_core.h
index 06778cec8416..207b0cda70da 100644
--- a/drivers/thermal/thermal_core.h
+++ b/drivers/thermal/thermal_core.h
@@ -89,46 +89,6 @@ thermal_cooling_device_stats_update(struct thermal_cooling_device *cdev,
 				    unsigned long new_state) {}
 #endif /* CONFIG_THERMAL_STATISTICS */
 
-#ifdef CONFIG_THERMAL_GOV_STEP_WISE
-int thermal_gov_step_wise_register(void);
-void thermal_gov_step_wise_unregister(void);
-#else
-static inline int thermal_gov_step_wise_register(void) { return 0; }
-static inline void thermal_gov_step_wise_unregister(void) {}
-#endif /* CONFIG_THERMAL_GOV_STEP_WISE */
-
-#ifdef CONFIG_THERMAL_GOV_FAIR_SHARE
-int thermal_gov_fair_share_register(void);
-void thermal_gov_fair_share_unregister(void);
-#else
-static inline int thermal_gov_fair_share_register(void) { return 0; }
-static inline void thermal_gov_fair_share_unregister(void) {}
-#endif /* CONFIG_THERMAL_GOV_FAIR_SHARE */
-
-#ifdef CONFIG_THERMAL_GOV_BANG_BANG
-int thermal_gov_bang_bang_register(void);
-void thermal_gov_bang_bang_unregister(void);
-#else
-static inline int thermal_gov_bang_bang_register(void) { return 0; }
-static inline void thermal_gov_bang_bang_unregister(void) {}
-#endif /* CONFIG_THERMAL_GOV_BANG_BANG */
-
-#ifdef CONFIG_THERMAL_GOV_USER_SPACE
-int thermal_gov_user_space_register(void);
-void thermal_gov_user_space_unregister(void);
-#else
-static inline int thermal_gov_user_space_register(void) { return 0; }
-static inline void thermal_gov_user_space_unregister(void) {}
-#endif /* CONFIG_THERMAL_GOV_USER_SPACE */
-
-#ifdef CONFIG_THERMAL_GOV_POWER_ALLOCATOR
-int thermal_gov_power_allocator_register(void);
-void thermal_gov_power_allocator_unregister(void);
-#else
-static inline int thermal_gov_power_allocator_register(void) { return 0; }
-static inline void thermal_gov_power_allocator_unregister(void) {}
-#endif /* CONFIG_THERMAL_GOV_POWER_ALLOCATOR */
-
 /* device tree support */
 #ifdef CONFIG_THERMAL_OF
 int of_parse_thermal_zones(void);
diff --git a/drivers/thermal/user_space.c b/drivers/thermal/user_space.c
index d62a99fc60a6..962873fd9242 100644
--- a/drivers/thermal/user_space.c
+++ b/drivers/thermal/user_space.c
@@ -44,14 +44,4 @@ static struct thermal_governor thermal_gov_user_space = {
 	.name		= "user_space",
 	.throttle	= notify_user_space,
 };
-
-int thermal_gov_user_space_register(void)
-{
-	return thermal_register_governor(&thermal_gov_user_space);
-}
-
-void thermal_gov_user_space_unregister(void)
-{
-	thermal_unregister_governor(&thermal_gov_user_space);
-}
-
+THERMAL_GOVERNOR_DECLARE(thermal_gov_user_space);