linux-kernel - [PATCH v3 5/5] thermal: of: Extend current of-thermal.c code to allow setting emulated temp

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 08 Dec 2014 18:04:21 +0100
From:	Lukasz Majewski <l.majewski@...sung.com>
To:	Eduardo Valentin <edubezval@...il.com>,
	Zhang Rui <rui.zhang@...el.com>
Cc:	Linux PM list <linux-pm@...r.kernel.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Lukasz Majewski <l.majewski@...ess.pl>,
	Mikko Perttunen <mperttunen@...dia.com>,
	Stephen Warren <swarren@...dotorg.org>,
	Abhilash Kesavan <kesavan.abhilash@...il.com>,
	Abhilash Kesavan <a.kesavan@...sung.com>,
	Guenter Roeck <linux@...ck-us.net>,
	linux-kernel@...r.kernel.org,
	Caesar Wang <caesar.wang@...k-chips.com>,
	navneet kumar <navneetk@...dia.com>,
	Lukasz Majewski <l.majewski@...sung.com>
Subject: [PATCH v3 5/5] thermal: of: Extend current of-thermal.c code to allow
 setting emulated temp

Before this change it was only possible to set get_temp() and get_trend()
methods to be used in the common code handling passing parameters via
device tree to "cpu-thermal" CPU thermal zone device.

Now it is possible to also set emulated value of temperature for debug
purposes.

Signed-off-by: Lukasz Majewski <l.majewski@...sung.com>
Acked-by: Eduardo Valentin <edubezval@...il.com>
---
Changes for v3:
- Update comment for .set_emul_temp method to indicate that it is optional

Changes for v2:
- Rework the emulated temperature setting code to use of_thermal_sensor_ops
structure
---
 drivers/thermal/of-thermal.c | 24 ++++++++++++++++++++++++
 include/linux/thermal.h      |  3 +++
 2 files changed, 27 insertions(+)

diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
index e062bf5..e145b66 100644
--- a/drivers/thermal/of-thermal.c
+++ b/drivers/thermal/of-thermal.c
@@ -161,6 +161,28 @@ of_thermal_get_trip_points(struct thermal_zone_device *tz)
 }
 EXPORT_SYMBOL_GPL(of_thermal_get_trip_points);
 
+/**
+ * of_thermal_set_emul_temp - function to set emulated temperature
+ *
+ * @tz:	pointer to a thermal zone
+ * @temp:	temperature to set
+ *
+ * This function gives the ability to set emulated value of temperature,
+ * which is handy for debugging
+ *
+ * Return: zero on success, error code otherwise
+ */
+static int of_thermal_set_emul_temp(struct thermal_zone_device *tz,
+				    unsigned long temp)
+{
+	struct __thermal_zone *data = tz->devdata;
+
+	if (!data->ops || !data->ops->set_emul_temp)
+		return -EINVAL;
+
+	return data->ops->set_emul_temp(data->sensor_data, temp);
+}
+
 static int of_thermal_get_trend(struct thermal_zone_device *tz, int trip,
 				enum thermal_trend *trend)
 {
@@ -392,6 +414,7 @@ thermal_zone_of_add_sensor(struct device_node *zone,
 
 	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;
@@ -520,6 +543,7 @@ void thermal_zone_of_sensor_unregister(struct device *dev,
 	mutex_lock(&tzd->lock);
 	tzd->ops->get_temp = NULL;
 	tzd->ops->get_trend = NULL;
+	tzd->ops->set_emul_temp = NULL;
 
 	tz->ops = NULL;
 	tz->sensor_data = NULL;
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index b8d91ef..99be7fc 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -297,10 +297,13 @@ struct thermal_genl_event {
  *
  * Optional:
  * @get_trend: a pointer to a function that reads the sensor temperature trend.
+ * @set_emul_temp: a pointer to a function that sets sensor emulated
+ *		   temperature.
  */
 struct thermal_zone_of_device_ops {
 	int (*get_temp)(void *, long *);
 	int (*get_trend)(void *, long *);
+	int (*set_emul_temp)(void *, unsigned long);
 };
 
 /**
-- 
2.0.0.rc2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/