You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
85 lines
2.3 KiB
85 lines
2.3 KiB
From 5b622cb2d6ff44b1fb0750beee61f93f2c00548a Mon Sep 17 00:00:00 2001
|
|
From: Sascha Hauer <s.hauer@pengutronix.de>
|
|
Date: Wed, 13 May 2015 10:52:36 +0200
|
|
Subject: [PATCH 17/76] thermal: Allow sensor ops to fail with -ENOSYS
|
|
|
|
The thermal core uses the existence of the .get_temp, .get_trend and
|
|
.set_emul_temp to detect whether this operation exists and should be
|
|
used or whether it should be emulated in software. This makes problems
|
|
for of-thermal which has to modify the struct thermal_zone_device_ops
|
|
during runtime whenever a sensor is registered or unregistered.
|
|
|
|
Let the core test for -ENOSYS from these callbacks and treat it like
|
|
if the callbacks were not present.
|
|
|
|
This allows of-thermal to always set the sensor related callbacks and
|
|
to make struct thermal_zone_device_ops const again.
|
|
|
|
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
|
|
---
|
|
drivers/thermal/thermal_core.c | 24 +++++++++++++++++-------
|
|
1 file changed, 17 insertions(+), 7 deletions(-)
|
|
|
|
--- a/drivers/thermal/thermal_core.c
|
|
+++ b/drivers/thermal/thermal_core.c
|
|
@@ -413,13 +413,16 @@ static void handle_thermal_trip(struct t
|
|
*/
|
|
int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp)
|
|
{
|
|
- int ret = -EINVAL;
|
|
+ int ret;
|
|
int count;
|
|
int crit_temp = INT_MAX;
|
|
enum thermal_trip_type type;
|
|
|
|
- if (!tz || IS_ERR(tz) || !tz->ops->get_temp)
|
|
- goto exit;
|
|
+ if (!tz || IS_ERR(tz))
|
|
+ return -EINVAL;
|
|
+
|
|
+ if (!tz->ops->get_temp)
|
|
+ return -ENOSYS;
|
|
|
|
mutex_lock(&tz->lock);
|
|
|
|
@@ -445,7 +448,7 @@ int thermal_zone_get_temp(struct thermal
|
|
}
|
|
|
|
mutex_unlock(&tz->lock);
|
|
-exit:
|
|
+
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(thermal_zone_get_temp);
|
|
@@ -454,10 +457,11 @@ void thermal_zone_device_update(struct t
|
|
{
|
|
int temp, ret, count;
|
|
|
|
- if (!tz->ops->get_temp)
|
|
+ ret = thermal_zone_get_temp(tz, &temp);
|
|
+
|
|
+ if (ret == -ENOSYS)
|
|
return;
|
|
|
|
- ret = thermal_zone_get_temp(tz, &temp);
|
|
if (ret) {
|
|
if (ret != -EAGAIN)
|
|
dev_warn(&tz->device,
|
|
@@ -783,10 +787,16 @@ emul_temp_store(struct device *dev, stru
|
|
if (kstrtoul(buf, 10, &temperature))
|
|
return -EINVAL;
|
|
|
|
- if (!tz->ops->set_emul_temp) {
|
|
+ if (tz->ops->set_emul_temp)
|
|
+ ret = tz->ops->set_emul_temp(tz, temperature);
|
|
+ else
|
|
+ ret = -ENOSYS;
|
|
+
|
|
+ if (ret == -ENOSYS) {
|
|
mutex_lock(&tz->lock);
|
|
tz->emul_temperature = temperature;
|
|
mutex_unlock(&tz->lock);
|
|
+ ret = 0;
|
|
} else {
|
|
ret = tz->ops->set_emul_temp(tz, temperature);
|
|
}
|
|
|