-----Original Message-----
From: R, Durgadoss
Sent: Monday, August 27, 2012 7:28 AM
To: lenb@kernel.org; Zhang, Rui
Cc: linux-acpi@vger.kernel.org; eduardo.valentin@ti.com; R, Durgadoss
Subject: [PATCHv2 04/14] Thermal: Add platform level information to
thermal.h
Importance: High

This patch creates two structures; one to hold bind bind parameters for
a thermal zone, and another to store platform layer data for a thermal
zone, and defines an extern function to retrieve these parameters from
thermal_sys.c. This patch also defines an enum that describes various
policies for thermal throttling.

Signed-off-by: Durgadoss R <redacted>
---
 drivers/thermal/thermal_sys.c |    3 +++
 include/linux/thermal.h       |   46
+++++++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+)

diff --git a/drivers/thermal/thermal_sys.c

b/drivers/thermal/thermal_sys.c index 5e141b5..92a187c 100644

--- a/drivers/thermal/thermal_sys.c
+++ b/drivers/thermal/thermal_sys.c

@@ -51,6 +51,9 @@ static LIST_HEAD(thermal_tz_list);  static

LIST_HEAD(thermal_cdev_list);  static DEFINE_MUTEX(thermal_list_lock);

+int (*get_platform_thermal_params)(struct thermal_zone_device *);
+EXPORT_SYMBOL(get_platform_thermal_params);
+

 static int get_idr(struct idr *idr, struct mutex *lock, int *id)  {
 	int err;

diff --git a/include/linux/thermal.h b/include/linux/thermal.h index

32af124..b644b8e 100644

--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h

@@ -67,6 +67,12 @@ enum thermal_trend {
 	THERMAL_TREND_DROPPING, /* temperature is dropping */  };

+enum thermal_throttle_policy {
+	THERMAL_USER_SPACE,
+	THERMAL_FAIR_SHARE,
+	THERMAL_STEP_WISE,
+};
+
 /* Events supported by Thermal Netlink */  enum events {
 	THERMAL_AUX0,

@@ -162,6 +168,37 @@ struct thermal_zone_device {
 	struct mutex lock; /* protect thermal_instances list */
 	struct list_head node;
 	struct delayed_work poll_queue;
+	struct thermal_zone_params *tzp;
+};
+
+/* Structure that holds binding parameters for a zone */ struct
+thermal_bind_params {
+	struct thermal_cooling_device *cdev;
+
+	/*
+	 * This is a measure of 'how effectively these devices can
+	 * cool 'this' thermal zone. The shall be determined by platform
+	 * characterization. This is on a 'percentage' scale.
+	 * See Documentation/thermal/sysfs-api.txt for more information.
+	 */
+	int weight;
+
+	/*
+	 * This is a bit mask that gives the binding relation between

this
+	 * thermal zone and cdev, for a particular trip point.
+	 * See Documentation/thermal/sysfs-api.txt for more information.
+	 */
+	int trip_mask;
+	int (*match) (struct thermal_zone_device *tz,
+			struct thermal_cooling_device *cdev); };

+	enum thermal_throttle_policy throttle_policy;
+	int num_tbps;	/* Number of tbp entries */
+	struct thermal_bind_params *tbp;
 };

 struct thermal_genl_event {

@@ -188,6 +225,15 @@ void thermal_cooling_device_unregister(struct

thermal_cooling_device *);  int get_tz_trend(struct thermal_zone_device
*, int);  struct thermal_instance *get_thermal_instance(struct
thermal_zone_device *,
 		struct thermal_cooling_device *, int);
+/*
+ * The platform layer shall define a 'function' that provides the
+ * parameters for all thermal zones in the platform. This pointer
+ * should point to that 'function'.
+ *
+ * In thermal_zone_device_register() we update the parameters
+ * for the particular thermal zone.
+ */
+extern int (*get_platform_thermal_params)(struct thermal_zone_device
+*);

 #ifdef CONFIG_NET
 extern int thermal_generate_netlink_event(u32 orig, enum events event);
--
1.7.9.5