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 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html