[PATCHv2 04/14] Thermal: Add platform level information to thermal.h
From: Durgadoss R <hidden>
Date: 2012-08-27 04:29:12
Subsystem:
the rest, thermal · Maintainers:
Linus Torvalds, Rafael J. Wysocki, Daniel Lezcano
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); +}; + +/* 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);
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1.7.9.5