linux-kernel - [PATCH 09/13] thermal: of: always set sensor related callbacks

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Message-Id: <1427385240-6086-10-git-send-email-s.hauer@pengutronix.de>
Date:	Thu, 26 Mar 2015 16:53:56 +0100
From:	Sascha Hauer <s.hauer@...gutronix.de>
To:	linux-pm@...r.kernel.org
Cc:	Zhang Rui <rui.zhang@...el.com>,
	Eduardo Valentin <edubezval@...il.com>,
	linux-kernel@...r.kernel.org,
	Stephen Warren <swarren@...dotorg.org>,
	Mikko Perttunen <mikko.perttunen@...si.fi>,
	kernel@...gutronix.de, linux-mediatek@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	Sascha Hauer <s.hauer@...gutronix.de>
Subject: [PATCH 09/13] thermal: of: always set sensor related callbacks

Now that the thermal core treats -ENOSYS like the callbacks were
not present at all we no longer have to overwrite the ops during
runtime but instead can always set them and return -ENOSYS if no
sensor is registered.

Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
---
 drivers/thermal/of-thermal.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
index b39e22f..df14fdd 100644
--- a/drivers/thermal/of-thermal.c
+++ b/drivers/thermal/of-thermal.c
@@ -91,7 +91,7 @@ static int of_thermal_get_temp(struct thermal_zone_device *tz,
 {
 	struct __thermal_zone *data = tz->devdata;
 
-	if (!data->ops->get_temp)
+	if (!data->ops)
 		return -EINVAL;
 
 	return data->ops->get_temp(data->sensor_data, temp);
@@ -178,7 +178,7 @@ static int of_thermal_set_emul_temp(struct thermal_zone_device *tz,
 	struct __thermal_zone *data = tz->devdata;
 
 	if (!data->ops || !data->ops->set_emul_temp)
-		return -EINVAL;
+		return -ENOSYS;
 
 	return data->ops->set_emul_temp(data->sensor_data, temp);
 }
@@ -189,8 +189,8 @@ static int of_thermal_get_trend(struct thermal_zone_device *tz, int trip,
 	struct __thermal_zone *data = tz->devdata;
 	int r;
 
-	if (!data->ops->get_trend)
-		return -EINVAL;
+	if (!data->ops || !data->ops->get_trend)
+		return -ENOSYS;
 
 	r = data->ops->get_trend(data->sensor_data, trip, trend);
 	if (r)
@@ -366,6 +366,10 @@ static int of_thermal_get_crit_temp(struct thermal_zone_device *tz,
 }
 
 static struct thermal_zone_device_ops of_thermal_ops = {
+	.get_temp = of_thermal_get_temp,
+	.get_trend = of_thermal_get_trend,
+	.set_emul_temp = of_thermal_set_emul_temp,
+
 	.get_mode = of_thermal_get_mode,
 	.set_mode = of_thermal_set_mode,
 
@@ -399,13 +403,13 @@ thermal_zone_of_add_sensor(struct device_node *zone,
 	if (!ops)
 		return ERR_PTR(-EINVAL);
 
+	if (!ops->get_temp)
+		return ERR_PTR(-EINVAL);
+
 	mutex_lock(&tzd->lock);
 	tz->ops = ops;
 	tz->sensor_data = data;
 
-	tzd->ops->get_temp = of_thermal_get_temp;
-	tzd->ops->get_trend = of_thermal_get_trend;
-	tzd->ops->set_emul_temp = of_thermal_set_emul_temp;
 	mutex_unlock(&tzd->lock);
 
 	return tzd;
-- 
2.1.4

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