linux-kernel - [PATCH v1 02/33] thermal/of: Make new code and old code co-exist

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Date:   Sun, 10 Jul 2022 23:23:52 +0200
From:   Daniel Lezcano <daniel.lezcano@...exp.org>
To:     daniel.lezcano@...aro.org, rafael@...nel.org
Cc:     rui.zhang@...el.com, khilman@...libre.com, abailon@...libre.com,
        amitk@...nel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org
Subject: [PATCH v1 02/33] thermal/of: Make new code and old code co-exist

This transient change allows to use old and new OF together until all
the drivers are converted to use the new OF API.

This will go away when the old OF code will be removed.

Signed-off-by: Daniel Lezcano <daniel.lezcano@...exp.org>
---
 drivers/thermal/thermal_core.c |  6 ------
 drivers/thermal/thermal_of.c   | 13 +++++++++++--
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 0d9e9b175f93..a4783ab7eabd 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1495,10 +1495,6 @@ static int __init thermal_init(void)
 	if (result)
 		goto unregister_governors;
 
-	result = of_parse_thermal_zones();
-	if (result)
-		goto unregister_class;
-
 	result = register_pm_notifier(&thermal_pm_nb);
 	if (result)
 		pr_warn("Thermal: Can not register suspend notifier, return %d\n",
@@ -1506,8 +1502,6 @@ static int __init thermal_init(void)
 
 	return 0;
 
-unregister_class:
-	class_unregister(&thermal_class);
 unregister_governors:
 	thermal_unregister_governors();
 error:
diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c
index 59e6411fcc23..60ce270f2add 100644
--- a/drivers/thermal/thermal_of.c
+++ b/drivers/thermal/thermal_of.c
@@ -485,7 +485,16 @@ thermal_zone_of_sensor_register(struct device *dev, int sensor_id, void *data,
 {
 	struct device_node *np, *child, *sensor_np;
 	struct thermal_zone_device *tzd = ERR_PTR(-ENODEV);
+	static int old_tz_initialized;
+	int ret;
 
+	if (!old_tz_initialized) {
+		ret = of_parse_thermal_zones();
+		if (ret)
+			return ERR_PTR(ret);
+		old_tz_initialized = 1;
+	}
+	
 	np = of_find_node_by_name(NULL, "thermal-zones");
 	if (!np)
 		return ERR_PTR(-ENODEV);
@@ -1004,7 +1013,7 @@ __init *thermal_of_build_thermal_zone(struct device_node *np)
 	return ERR_PTR(ret);
 }
 
-static __init void of_thermal_free_zone(struct __thermal_zone *tz)
+static void of_thermal_free_zone(struct __thermal_zone *tz)
 {
 	struct __thermal_bind_params *tbp;
 	int i, j;
@@ -1509,7 +1518,7 @@ EXPORT_SYMBOL_GPL(devm_thermal_of_zone_unregister);
  * Return: 0 on success, proper error code otherwise
  *
  */
-int __init of_parse_thermal_zones(void)
+int of_parse_thermal_zones(void)
 {
 	struct device_node *np, *child;
 	struct __thermal_zone *tz;
-- 
2.25.1