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 <durgadoss.r@xxxxxxxxx>
---
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);
+};
+
+/* Structure to define Thermal Zone parameters */
+struct thermal_zone_params {
+ const char *zone_name;
+ 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
--
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