[PATCH 04/13] Thermal: Add platform level information to thermal.h

[Durgadoss R <durgadoss.r@xxxxxxxxx>]

This patch creates a structure to hold a thermal zone's
platform level info, and also defines an extern function to
retrieve zone parameters from thermal_sys.c.

Signed-off-by: Durgadoss R <durgadoss.r@xxxxxxxxx>
---
 drivers/thermal/thermal_sys.c |    3 +++
 include/linux/thermal.h       |   43 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+)

diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
index 998c16e..f043cd6 100644
--- a/drivers/thermal/thermal_sys.c
+++ b/drivers/thermal/thermal_sys.c
@@ -49,6 +49,9 @@ 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 757a007..f9ce1e2 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -33,6 +33,8 @@
 #define THERMAL_MAX_TRIPS	12
 #define THERMAL_NAME_LENGTH	20
 
+#define MAX_COOLING_DEVS	THERMAL_MAX_TRIPS
+
 /* Initial state of a cooling device during binding */
 #define THERMAL_NO_TARGET	-1UL
 
@@ -49,6 +51,11 @@
 #define THERMAL_GENL_VERSION                    0x01
 #define THERMAL_GENL_MCAST_GROUP_NAME           "thermal_mc_group"
 
+/* Thermal policies */
+#define THERMAL_USER_SPACE	0
+#define THERMAL_FAIR_SHARE	1
+#define	THERMAL_STEP_WISE	2
+
 struct thermal_zone_device;
 struct thermal_cooling_device;
 
@@ -165,6 +172,7 @@ 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;
 };
 
 /*
@@ -187,6 +195,31 @@ struct thermal_instance {
 	struct list_head cdev_node; /* node in cdev->thermal_instances */
 };
 
+/* Platform level parameters associated with a thermal zone */
+struct thermal_zone_params {
+	char *thermal_zone_name;
+	int throttle_policy;
+
+	/* Number of cooling devices associated with this thermal zone */
+	int num_cdevs;
+	char *cdevs_name[MAX_COOLING_DEVS];
+
+	/*
+	 * 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 weights[MAX_COOLING_DEVS];
+
+	/*
+	 * 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[MAX_COOLING_DEVS];
+};
+
 struct thermal_genl_event {
 	u32 orig;
 	enum events event;
@@ -213,6 +246,16 @@ struct thermal_cooling_device *get_cdev_by_name(const char *);
 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);
 #else
-- 
1.7.9.5

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