linux-kernel - [PATCH] thermal: document struct thermal_zone_device and thermal

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-next>] [day] [month] [year] [list]

Message-Id: <1400238968-8816-1-git-send-email-javi.merino@arm.com>
Date:	Fri, 16 May 2014 12:16:08 +0100
From:	Javi Merino <javi.merino@....com>
To:	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	Punit.Agrawal@....com, Javi Merino <javi.merino@....com>,
	Zhang Rui <rui.zhang@...el.com>,
	Eduardo Valentin <eduardo.valentin@...com>
Subject: [PATCH] thermal: document struct thermal_zone_device and thermal_governor

Document struct struct thermal_zone_device and struct thermal_governor
fields and their use by the thermal framework code.

Cc: Zhang Rui <rui.zhang@...el.com>
Cc: Eduardo Valentin <eduardo.valentin@...com>
Signed-off-by: Javi Merino <javi.merino@....com>

---

Hi linux-pm,

I have some patches that add new fields to these structures but I
don't have a good place to describe those fields as these structs are
mostly undocumented so I thought I'd document them.

I'm unsure about some of the descriptions, specially for passive and
forced_passive so please review them.

 include/linux/thermal.h |   44 ++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 42 insertions(+), 2 deletions(-)

diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index f7e11c7ea7d9..af928c667dba 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -158,6 +158,40 @@ struct thermal_attr {
 	char name[THERMAL_NAME_LENGTH];
 };
 
+/**
+ * struct thermal_zone_device - structure for a thermal zone
+ * @id:		unique id number for each thermal zone
+ * @type:	the thermal zone device type
+ * @device:	struct device for this thermal zone
+ * @trip_temp_attrs:	attributes for trip points for sysfs: trip temperature
+ * @trip_type_attrs:	attributes for trip points for sysfs: trip type
+ * @trip_hyst_attrs:	attributes for trip points for sysfs: trip hysteresis
+ * @devdata:	private pointer for device private data
+ * @trips:	number of trip points the thermal zone supports
+ * @passive_delay:	number of milliseconds to wait between polls when
+ *			performing passive cooling.  Only used by the step-wise
+ *			governor
+ * @polling_delay:	number of milliseconds to wait between polls when
+ *			checking whether trip points have been crossed (0 for
+ *			interrupt driven systems)
+ * @temperature:	current temperature.  This is only for core code,
+ *			drivers should use thermal_zone_get_temp() to get the
+ *			current temperature
+ * @last_temperature:	previous temperature read
+ * @emul_temperature:	emulated temperature when using CONFIG_THERMAL_EMULATION
+ * @passive:	step-wise specific parameter.  1 if you've crossed a passive
+ *		trip point, 0 otherwise
+ * @forced_passive:	step-wise specific parameter.  If > 0, temperature at
+ *			which to switch on all cpufreq cooling devices.
+ * @ops:	operations this thermal_zone_device supports
+ * @tzp:	thermal zone parameters
+ * @governor:	pointer to the governor for this thermal zone
+ * @thermal_instances:	list of struct thermal_instance of this thermal zone
+ * @idr:	struct idr to generate unique id for this zone's cooling devices
+ * @lock:	lock to protect thermal_instances list
+ * @node:	node in thermal_tz_list (in thermal_core.c)
+ * @poll_queue:	delayed work for polling
+ */
 struct thermal_zone_device {
 	int id;
 	char type[THERMAL_NAME_LENGTH];
@@ -179,12 +213,18 @@ struct thermal_zone_device {
 	struct thermal_governor *governor;
 	struct list_head thermal_instances;
 	struct idr idr;
-	struct mutex lock; /* protect thermal_instances list */
+	struct mutex lock;
 	struct list_head node;
 	struct delayed_work poll_queue;
 };
 
-/* Structure that holds thermal governor information */
+/**
+ * struct thermal_governor - structure that holds thermal governor information
+ * @name:	name of the governor
+ * @throttle:	callback called for every trip point even if temperature is
+ *		below the trip point temperature
+ * @governor_list:	node in thermal_governor_list (in thermal_core.c)
+ */
 struct thermal_governor {
 	char name[THERMAL_NAME_LENGTH];
 	int (*throttle)(struct thermal_zone_device *tz, int trip);
-- 
1.7.9.5


--
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/