diff options
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/samsung/Kconfig | 19 | ||||
| -rw-r--r-- | drivers/thermal/samsung/Makefile | 4 | ||||
| -rw-r--r-- | drivers/thermal/samsung/exynos_thermal.c | 419 | ||||
| -rw-r--r-- | drivers/thermal/samsung/exynos_thermal_common.c | 385 | ||||
| -rw-r--r-- | drivers/thermal/samsung/exynos_thermal_common.h | 83 |
5 files changed, 491 insertions, 419 deletions
diff --git a/drivers/thermal/samsung/Kconfig b/drivers/thermal/samsung/Kconfig index 2cf31ad90fa..f8100b1b953 100644 --- a/drivers/thermal/samsung/Kconfig +++ b/drivers/thermal/samsung/Kconfig @@ -1,8 +1,17 @@ config EXYNOS_THERMAL - tristate "Temperature sensor on Samsung EXYNOS" + tristate "Exynos thermal management unit driver" depends on ARCH_HAS_BANDGAP help - If you say yes here you get support for TMU (Thermal Management - Unit) on SAMSUNG EXYNOS series of SoC. This helps in registering - the exynos thermal driver with the core thermal layer and cpu - cooling API's. + If you say yes here you get support for the TMU (Thermal Management + Unit) driver for SAMSUNG EXYNOS series of soc. This driver initialises + the TMU, reports temperature and handles cooling action if defined. + This driver uses the exynos core thermal API's. + +config EXYNOS_THERMAL_CORE + bool "Core thermal framework support for EXYNOS SOC's" + depends on EXYNOS_THERMAL + help + If you say yes here you get support for EXYNOS TMU + (Thermal Management Unit) common registration/unregistration + functions to the core thermal layer and also to use the generic + cpu cooling API's. diff --git a/drivers/thermal/samsung/Makefile b/drivers/thermal/samsung/Makefile index 1fe6d939e8f..6227d4fbec0 100644 --- a/drivers/thermal/samsung/Makefile +++ b/drivers/thermal/samsung/Makefile @@ -1,4 +1,6 @@ # # Samsung thermal specific Makefile # -obj-$(CONFIG_EXYNOS_THERMAL) += exynos_thermal.o +obj-$(CONFIG_EXYNOS_THERMAL) += exynos_soc_thermal.o +exynos_soc_thermal-y := exynos_thermal.o +exynos_soc_thermal-$(CONFIG_EXYNOS_THERMAL_CORE) += exynos_thermal_common.o diff --git a/drivers/thermal/samsung/exynos_thermal.c b/drivers/thermal/samsung/exynos_thermal.c index 9af4b93c9f8..f3500ab6615 100644 --- a/drivers/thermal/samsung/exynos_thermal.c +++ b/drivers/thermal/samsung/exynos_thermal.c @@ -21,23 +21,15 @@ * */ -#include <linux/module.h> -#include <linux/err.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/platform_device.h> -#include <linux/interrupt.h> #include <linux/clk.h> -#include <linux/workqueue.h> -#include <linux/sysfs.h> -#include <linux/kobject.h> #include <linux/io.h> -#include <linux/mutex.h> -#include <linux/platform_data/exynos_thermal.h> -#include <linux/thermal.h> -#include <linux/cpufreq.h> -#include <linux/cpu_cooling.h> +#include <linux/interrupt.h> +#include <linux/module.h> #include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/platform_data/exynos_thermal.h> + +#include "exynos_thermal_common.h" /* Exynos generic registers */ #define EXYNOS_TMU_REG_TRIMINFO 0x0 @@ -88,16 +80,6 @@ #define EFUSE_MIN_VALUE 40 #define EFUSE_MAX_VALUE 100 -/* In-kernel thermal framework related macros & definations */ -#define SENSOR_NAME_LEN 16 -#define MAX_TRIP_COUNT 8 -#define MAX_COOLING_DEVICE 4 -#define MAX_THRESHOLD_LEVS 4 - -#define ACTIVE_INTERVAL 500 -#define IDLE_INTERVAL 10000 -#define MCELSIUS 1000 - #ifdef CONFIG_THERMAL_EMULATION #define EXYNOS_EMUL_TIME 0x57F0 #define EXYNOS_EMUL_TIME_SHIFT 16 @@ -106,17 +88,6 @@ #define EXYNOS_EMUL_ENABLE 0x1 #endif /* CONFIG_THERMAL_EMULATION */ -/* CPU Zone information */ -#define PANIC_ZONE 4 -#define WARN_ZONE 3 -#define MONITOR_ZONE 2 -#define SAFE_ZONE 1 - -#define GET_ZONE(trip) (trip + 2) -#define GET_TRIP(zone) (zone - 2) - -#define EXYNOS_ZONE_COUNT 3 - struct exynos_tmu_data { struct exynos_tmu_platform_data *pdata; struct resource *mem; @@ -129,384 +100,6 @@ struct exynos_tmu_data { u8 temp_error1, temp_error2; }; -struct thermal_trip_point_conf { - int trip_val[MAX_TRIP_COUNT]; - int trip_count; - u8 trigger_falling; -}; - -struct thermal_cooling_conf { - struct freq_clip_table freq_data[MAX_TRIP_COUNT]; - int freq_clip_count; -}; - -struct thermal_sensor_conf { - char name[SENSOR_NAME_LEN]; - int (*read_temperature)(void *data); - int (*write_emul_temp)(void *drv_data, unsigned long temp); - struct thermal_trip_point_conf trip_data; - struct thermal_cooling_conf cooling_data; - void *private_data; -}; - -struct exynos_thermal_zone { - enum thermal_device_mode mode; - struct thermal_zone_device *therm_dev; - struct thermal_cooling_device *cool_dev[MAX_COOLING_DEVICE]; - unsigned int cool_dev_size; - struct platform_device *exynos4_dev; - struct thermal_sensor_conf *sensor_conf; - bool bind; -}; - -static struct exynos_thermal_zone *th_zone; -static void exynos_unregister_thermal(void); -static int exynos_register_thermal(struct thermal_sensor_conf *sensor_conf); - -/* Get mode callback functions for thermal zone */ -static int exynos_get_mode(struct thermal_zone_device *thermal, - enum thermal_device_mode *mode) -{ - if (th_zone) - *mode = th_zone->mode; - return 0; -} - -/* Set mode callback functions for thermal zone */ -static int exynos_set_mode(struct thermal_zone_device *thermal, - enum thermal_device_mode mode) -{ - if (!th_zone->therm_dev) { - pr_notice("thermal zone not registered\n"); - return 0; - } - - mutex_lock(&th_zone->therm_dev->lock); - - if (mode == THERMAL_DEVICE_ENABLED && - !th_zone->sensor_conf->trip_data.trigger_falling) - th_zone->therm_dev->polling_delay = IDLE_INTERVAL; - else - th_zone->therm_dev->polling_delay = 0; - - mutex_unlock(&th_zone->therm_dev->lock); - - th_zone->mode = mode; - thermal_zone_device_update(th_zone->therm_dev); - pr_info("thermal polling set for duration=%d msec\n", - th_zone->therm_dev->polling_delay); - return 0; -} - - -/* Get trip type callback functions for thermal zone */ -static int exynos_get_trip_type(struct thermal_zone_device *thermal, int trip, - enum thermal_trip_type *type) -{ - switch (GET_ZONE(trip)) { - case MONITOR_ZONE: - case WARN_ZONE: - *type = THERMAL_TRIP_ACTIVE; - break; - case PANIC_ZONE: - *type = THERMAL_TRIP_CRITICAL; - break; - default: - return -EINVAL; - } - return 0; -} - -/* Get trip temperature callback functions for thermal zone */ -static int exynos_get_trip_temp(struct thermal_zone_device *thermal, int trip, - unsigned long *temp) -{ - if (trip < GET_TRIP(MONITOR_ZONE) || trip > GET_TRIP(PANIC_ZONE)) - return -EINVAL; - - *temp = th_zone->sensor_conf->trip_data.trip_val[trip]; - /* convert the temperature into millicelsius */ - *temp = *temp * MCELSIUS; - - return 0; -} - -/* Get critical temperature callback functions for thermal zone */ -static int exynos_get_crit_temp(struct thermal_zone_device *thermal, - unsigned long *temp) -{ - int ret; - /* Panic zone */ - ret = exynos_get_trip_temp(thermal, GET_TRIP(PANIC_ZONE), temp); - return ret; -} - -/* Bind callback functions for thermal zone */ -static int exynos_bind(struct thermal_zone_device *thermal, - struct thermal_cooling_device *cdev) -{ - int ret = 0, i, tab_size, level; - struct freq_clip_table *tab_ptr, *clip_data; - struct thermal_sensor_conf *data = th_zone->sensor_conf; - - tab_ptr = (struct freq_clip_table *)data->cooling_data.freq_data; - tab_size = data->cooling_data.freq_clip_count; - - if (tab_ptr == NULL || tab_size == 0) - return -EINVAL; - - /* find the cooling device registered*/ - for (i = 0; i < th_zone->cool_dev_size; i++) - if (cdev == th_zone->cool_dev[i]) - break; - - /* No matching cooling device */ - if (i == th_zone->cool_dev_size) - return 0; - - /* Bind the thermal zone to the cpufreq cooling device */ - for (i = 0; i < tab_size; i++) { - clip_data = (struct freq_clip_table *)&(tab_ptr[i]); - level = cpufreq_cooling_get_level(0, clip_data->freq_clip_max); - if (level == THERMAL_CSTATE_INVALID) - return 0; - switch (GET_ZONE(i)) { - case MONITOR_ZONE: - case WARN_ZONE: - if (thermal_zone_bind_cooling_device(thermal, i, cdev, - level, 0)) { - pr_err("error binding cdev inst %d\n", i); - ret = -EINVAL; - } - th_zone->bind = true; - break; - default: - ret = -EINVAL; - } - } - - return ret; -} - -/* Unbind callback functions for thermal zone */ -static int exynos_unbind(struct thermal_zone_device *thermal, - struct thermal_cooling_device *cdev) -{ - int ret = 0, i, tab_size; - struct thermal_sensor_conf *data = th_zone->sensor_conf; - - if (th_zone->bind == false) - return 0; - - tab_size = data->cooling_data.freq_clip_count; - - if (tab_size == 0) - return -EINVAL; - - /* find the cooling device registered*/ - for (i = 0; i < th_zone->cool_dev_size; i++) - if (cdev == th_zone->cool_dev[i]) - break; - - /* No matching cooling device */ - if (i == th_zone->cool_dev_size) - return 0; - - /* Bind the thermal zone to the cpufreq cooling device */ - for (i = 0; i < tab_size; i++) { - switch (GET_ZONE(i)) { - case MONITOR_ZONE: - case WARN_ZONE: - if (thermal_zone_unbind_cooling_device(thermal, i, - cdev)) { - pr_err("error unbinding cdev inst=%d\n", i); - ret = -EINVAL; - } - th_zone->bind = false; - break; - default: - ret = -EINVAL; - } - } - return ret; -} - -/* Get temperature callback functions for thermal zone */ -static int exynos_get_temp(struct thermal_zone_device *thermal, - unsigned long *temp) -{ - void *data; - - if (!th_zone->sensor_conf) { - pr_info("Temperature sensor not initialised\n"); - return -EINVAL; - } - data = th_zone->sensor_conf->private_data; - *temp = th_zone->sensor_conf->read_temperature(data); - /* convert the temperature into millicelsius */ - *temp = *temp * MCELSIUS; - return 0; -} - -/* Get temperature callback functions for thermal zone */ -static int exynos_set_emul_temp(struct thermal_zone_device *thermal, - unsigned long temp) -{ - void *data; - int ret = -EINVAL; - - if (!th_zone->sensor_conf) { - pr_info("Temperature sensor not initialised\n"); - return -EINVAL; - } - data = th_zone->sensor_conf->private_data; - if (th_zone->sensor_conf->write_emul_temp) - ret = th_zone->sensor_conf->write_emul_temp(data, temp); - return ret; -} - -/* Get the temperature trend */ -static int exynos_get_trend(struct thermal_zone_device *thermal, - int trip, enum thermal_trend *trend) -{ - int ret; - unsigned long trip_temp; - - ret = exynos_get_trip_temp(thermal, trip, &trip_temp); - if (ret < 0) - return ret; - - if (thermal->temperature >= trip_temp) - *trend = THERMAL_TREND_RAISE_FULL; - else - *trend = THERMAL_TREND_DROP_FULL; - - return 0; -} -/* Operation callback functions for thermal zone */ -static struct thermal_zone_device_ops const exynos_dev_ops = { - .bind = exynos_bind, - .unbind = exynos_unbind, - .get_temp = exynos_get_temp, - .set_emul_temp = exynos_set_emul_temp, - .get_trend = exynos_get_trend, - .get_mode = exynos_get_mode, - .set_mode = exynos_set_mode, - .get_trip_type = exynos_get_trip_type, - .get_trip_temp = exynos_get_trip_temp, - .get_crit_temp = exynos_get_crit_temp, -}; - -/* - * This function may be called from interrupt based temperature sensor - * when threshold is changed. - */ -static void exynos_report_trigger(void) -{ - unsigned int i; - char data[10]; - char *envp[] = { data, NULL }; - - if (!th_zone || !th_zone->therm_dev) - return; - if (th_zone->bind == false) { - for (i = 0; i < th_zone->cool_dev_size; i++) { - if (!th_zone->cool_dev[i]) - continue; - exynos_bind(th_zone->therm_dev, - th_zone->cool_dev[i]); - } - } - - thermal_zone_device_update(th_zone->therm_dev); - - mutex_lock(&th_zone->therm_dev->lock); - /* Find the level for which trip happened */ - for (i = 0; i < th_zone->sensor_conf->trip_data.trip_count; i++) { - if (th_zone->therm_dev->last_temperature < - th_zone->sensor_conf->trip_data.trip_val[i] * MCELSIUS) - break; - } - - if (th_zone->mode == THERMAL_DEVICE_ENABLED && - !th_zone->sensor_conf->trip_data.trigger_falling) { - if (i > 0) - th_zone->therm_dev->polling_delay = ACTIVE_INTERVAL; - else - th_zone->therm_dev->polling_delay = IDLE_INTERVAL; - } - - snprintf(data, sizeof(data), "%u", i); - kobject_uevent_env(&th_zone->therm_dev->device.kobj, KOBJ_CHANGE, envp); - mutex_unlock(&th_zone->therm_dev->lock); -} - -/* Register with the in-kernel thermal management */ -static int exynos_register_thermal(struct thermal_sensor_conf *sensor_conf) -{ - int ret; - struct cpumask mask_val; - - if (!sensor_conf || !sensor_conf->read_temperature) { - pr_err("Temperature sensor not initialised\n"); - return -EINVAL; - } - - th_zone = kzalloc(sizeof(struct exynos_thermal_zone), GFP_KERNEL); - if (!th_zone) - return -ENOMEM; - - th_zone->sensor_conf = sensor_conf; - cpumask_set_cpu(0, &mask_val); - th_zone->cool_dev[0] = cpufreq_cooling_register(&mask_val); - if (IS_ERR(th_zone->cool_dev[0])) { - pr_err("Failed to register cpufreq cooling device\n"); - ret = -EINVAL; - goto err_unregister; - } - th_zone->cool_dev_size++; - - th_zone->therm_dev = thermal_zone_device_register(sensor_conf->name, - EXYNOS_ZONE_COUNT, 0, NULL, &exynos_dev_ops, NULL, 0, - sensor_conf->trip_data.trigger_falling ? - 0 : IDLE_INTERVAL); - - if (IS_ERR(th_zone->therm_dev)) { - pr_err("Failed to register thermal zone device\n"); - ret = PTR_ERR(th_zone->therm_dev); - goto err_unregister; - } - th_zone->mode = THERMAL_DEVICE_ENABLED; - - pr_info("Exynos: Kernel Thermal management registered\n"); - - return 0; - -err_unregister: - exynos_unregister_thermal(); - return ret; -} - -/* Un-Register with the in-kernel thermal management */ -static void exynos_unregister_thermal(void) -{ - int i; - - if (!th_zone) - return; - - if (th_zone->therm_dev) - thermal_zone_device_unregister(th_zone->therm_dev); - - for (i = 0; i < th_zone->cool_dev_size; i++) { - if (th_zone->cool_dev[i]) - cpufreq_cooling_unregister(th_zone->cool_dev[i]); - } - - kfree(th_zone); - pr_info("Exynos: Kernel Thermal management unregistered\n"); -} - /* * TMU treats temperature as a mapped temperature code. * The temperature is converted differently depending on the calibration type. diff --git a/drivers/thermal/samsung/exynos_thermal_common.c b/drivers/thermal/samsung/exynos_thermal_common.c new file mode 100644 index 00000000000..f20f458be0a --- /dev/null +++ b/drivers/thermal/samsung/exynos_thermal_common.c @@ -0,0 +1,385 @@ +/* + * exynos_thermal_common.c - Samsung EXYNOS common thermal file + * + * Copyright (C) 2013 Samsung Electronics + * Amit Daniel Kachhap <amit.daniel@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <linux/cpu_cooling.h> +#include <linux/err.h> +#include <linux/platform_data/exynos_thermal.h> +#include <linux/slab.h> +#include <linux/thermal.h> + +#include "exynos_thermal_common.h" + +struct exynos_thermal_zone { + enum thermal_device_mode mode; + struct thermal_zone_device *therm_dev; + struct thermal_cooling_device *cool_dev[MAX_COOLING_DEVICE]; + unsigned int cool_dev_size; + struct platform_device *exynos4_dev; + struct thermal_sensor_conf *sensor_conf; + bool bind; +}; + +static struct exynos_thermal_zone *th_zone; + +/* Get mode callback functions for thermal zone */ +static int exynos_get_mode(struct thermal_zone_device *thermal, + enum thermal_device_mode *mode) +{ + if (th_zone) + *mode = th_zone->mode; + return 0; +} + +/* Set mode callback functions for thermal zone */ +static int exynos_set_mode(struct thermal_zone_device *thermal, + enum thermal_device_mode mode) +{ + if (!th_zone->therm_dev) { + pr_notice("thermal zone not registered\n"); + return 0; + } + + mutex_lock(&th_zone->therm_dev->lock); + + if (mode == THERMAL_DEVICE_ENABLED && + !th_zone->sensor_conf->trip_data.trigger_falling) + th_zone->therm_dev->polling_delay = IDLE_INTERVAL; + else + th_zone->therm_dev->polling_delay = 0; + + mutex_unlock(&th_zone->therm_dev->lock); + + th_zone->mode = mode; + thermal_zone_device_update(th_zone->therm_dev); + pr_info("thermal polling set for duration=%d msec\n", + th_zone->therm_dev->polling_delay); + return 0; +} + + +/* Get trip type callback functions for thermal zone */ +static int exynos_get_trip_type(struct thermal_zone_device *thermal, int trip, + enum thermal_trip_type *type) +{ + switch (GET_ZONE(trip)) { + case MONITOR_ZONE: + case WARN_ZONE: + *type = THERMAL_TRIP_ACTIVE; + break; + case PANIC_ZONE: + *type = THERMAL_TRIP_CRITICAL; + break; + default: + return -EINVAL; + } + return 0; +} + +/* Get trip temperature callback functions for thermal zone */ +static int exynos_get_trip_temp(struct thermal_zone_device *thermal, int trip, + unsigned long *temp) +{ + if (trip < GET_TRIP(MONITOR_ZONE) || trip > GET_TRIP(PANIC_ZONE)) + return -EINVAL; + + *temp = th_zone->sensor_conf->trip_data.trip_val[trip]; + /* convert the temperature into millicelsius */ + *temp = *temp * MCELSIUS; + + return 0; +} + +/* Get critical temperature callback functions for thermal zone */ +static int exynos_get_crit_temp(struct thermal_zone_device *thermal, + unsigned long *temp) +{ + int ret; + /* Panic zone */ + ret = exynos_get_trip_temp(thermal, GET_TRIP(PANIC_ZONE), temp); + return ret; +} + +/* Bind callback functions for thermal zone */ +static int exynos_bind(struct thermal_zone_device *thermal, + struct thermal_cooling_device *cdev) +{ + int ret = 0, i, tab_size, level; + struct freq_clip_table *tab_ptr, *clip_data; + struct thermal_sensor_conf *data = th_zone->sensor_conf; + + tab_ptr = (struct freq_clip_table *)data->cooling_data.freq_data; + tab_size = data->cooling_data.freq_clip_count; + + if (tab_ptr == NULL || tab_size == 0) + return -EINVAL; + + /* find the cooling device registered*/ + for (i = 0; i < th_zone->cool_dev_size; i++) + if (cdev == th_zone->cool_dev[i]) + break; + + /* No matching cooling device */ + if (i == th_zone->cool_dev_size) + return 0; + + /* Bind the thermal zone to the cpufreq cooling device */ + for (i = 0; i < tab_size; i++) { + clip_data = (struct freq_clip_table *)&(tab_ptr[i]); + level = cpufreq_cooling_get_level(0, clip_data->freq_clip_max); + if (level == THERMAL_CSTATE_INVALID) + return 0; + switch (GET_ZONE(i)) { + case MONITOR_ZONE: + case WARN_ZONE: + if (thermal_zone_bind_cooling_device(thermal, i, cdev, + level, 0)) { + pr_err("error binding cdev inst %d\n", i); + ret = -EINVAL; + } + th_zone->bind = true; + break; + default: + ret = -EINVAL; + } + } + + return ret; +} + +/* Unbind callback functions for thermal zone */ +static int exynos_unbind(struct thermal_zone_device *thermal, + struct thermal_cooling_device *cdev) +{ + int ret = 0, i, tab_size; + struct thermal_sensor_conf *data = th_zone->sensor_conf; + + if (th_zone->bind == false) + return 0; + + tab_size = data->cooling_data.freq_clip_count; + + if (tab_size == 0) + return -EINVAL; + + /* find the cooling device registered*/ + for (i = 0; i < th_zone->cool_dev_size; i++) + if (cdev == th_zone->cool_dev[i]) + break; + + /* No matching cooling device */ + if (i == th_zone->cool_dev_size) + return 0; + + /* Bind the thermal zone to the cpufreq cooling device */ + for (i = 0; i < tab_size; i++) { + switch (GET_ZONE(i)) { + case MONITOR_ZONE: + case WARN_ZONE: + if (thermal_zone_unbind_cooling_device(thermal, i, + cdev)) { + pr_err("error unbinding cdev inst=%d\n", i); + ret = -EINVAL; + } + th_zone->bind = false; + break; + default: + ret = -EINVAL; + } + } + return ret; +} + +/* Get temperature callback functions for thermal zone */ +static int exynos_get_temp(struct thermal_zone_device *thermal, + unsigned long *temp) +{ + void *data; + + if (!th_zone->sensor_conf) { + pr_info("Temperature sensor not initialised\n"); + return -EINVAL; + } + data = th_zone->sensor_conf->private_data; + *temp = th_zone->sensor_conf->read_temperature(data); + /* convert the temperature into millicelsius */ + *temp = *temp * MCELSIUS; + return 0; +} + +/* Get temperature callback functions for thermal zone */ +static int exynos_set_emul_temp(struct thermal_zone_device *thermal, + unsigned long temp) +{ + void *data; + int ret = -EINVAL; + + if (!th_zone->sensor_conf) { + pr_info("Temperature sensor not initialised\n"); + return -EINVAL; + } + data = th_zone->sensor_conf->private_data; + if (th_zone->sensor_conf->write_emul_temp) + ret = th_zone->sensor_conf->write_emul_temp(data, temp); + return ret; +} + +/* Get the temperature trend */ +static int exynos_get_trend(struct thermal_zone_device *thermal, + int trip, enum thermal_trend *trend) +{ + int ret; + unsigned long trip_temp; + + ret = exynos_get_trip_temp(thermal, trip, &trip_temp); + if (ret < 0) + return ret; + + if (thermal->temperature >= trip_temp) + *trend = THERMAL_TREND_RAISE_FULL; + else + *trend = THERMAL_TREND_DROP_FULL; + + return 0; +} +/* Operation callback functions for thermal zone */ +static struct thermal_zone_device_ops const exynos_dev_ops = { + .bind = exynos_bind, + .unbind = exynos_unbind, + .get_temp = exynos_get_temp, + .set_emul_temp = exynos_set_emul_temp, + .get_trend = exynos_get_trend, + .get_mode = exynos_get_mode, + .set_mode = exynos_set_mode, + .get_trip_type = exynos_get_trip_type, + .get_trip_temp = exynos_get_trip_temp, + .get_crit_temp = exynos_get_crit_temp, +}; + +/* + * This function may be called from interrupt based temperature sensor + * when threshold is changed. + */ +void exynos_report_trigger(void) +{ + unsigned int i; + char data[10]; + char *envp[] = { data, NULL }; + + if (!th_zone || !th_zone->therm_dev) + return; + if (th_zone->bind == false) { + for (i = 0; i < th_zone->cool_dev_size; i++) { + if (!th_zone->cool_dev[i]) + continue; + exynos_bind(th_zone->therm_dev, + th_zone->cool_dev[i]); + } + } + + thermal_zone_device_update(th_zone->therm_dev); + + mutex_lock(&th_zone->therm_dev->lock); + /* Find the level for which trip happened */ + for (i = 0; i < th_zone->sensor_conf->trip_data.trip_count; i++) { + if (th_zone->therm_dev->last_temperature < + th_zone->sensor_conf->trip_data.trip_val[i] * MCELSIUS) + break; + } + + if (th_zone->mode == THERMAL_DEVICE_ENABLED && + !th_zone->sensor_conf->trip_data.trigger_falling) { + if (i > 0) + th_zone->therm_dev->polling_delay = ACTIVE_INTERVAL; + else + th_zone->therm_dev->polling_delay = IDLE_INTERVAL; + } + + snprintf(data, sizeof(data), "%u", i); + kobject_uevent_env(&th_zone->therm_dev->device.kobj, KOBJ_CHANGE, envp); + mutex_unlock(&th_zone->therm_dev->lock); +} + +/* Register with the in-kernel thermal management */ +int exynos_register_thermal(struct thermal_sensor_conf *sensor_conf) +{ + int ret; + struct cpumask mask_val; + + if (!sensor_conf || !sensor_conf->read_temperature) { + pr_err("Temperature sensor not initialised\n"); + return -EINVAL; + } + + th_zone = kzalloc(sizeof(struct exynos_thermal_zone), GFP_KERNEL); + if (!th_zone) + return -ENOMEM; + + th_zone->sensor_conf = sensor_conf; + cpumask_set_cpu(0, &mask_val); + th_zone->cool_dev[0] = cpufreq_cooling_register(&mask_val); + if (IS_ERR(th_zone->cool_dev[0])) { + pr_err("Failed to register cpufreq cooling device\n"); + ret = -EINVAL; + goto err_unregister; + } + th_zone->cool_dev_size++; + + th_zone->therm_dev = thermal_zone_device_register(sensor_conf->name, + EXYNOS_ZONE_COUNT, 0, NULL, &exynos_dev_ops, NULL, 0, + sensor_conf->trip_data.trigger_falling ? + 0 : IDLE_INTERVAL); + + if (IS_ERR(th_zone->therm_dev)) { + pr_err("Failed to register thermal zone device\n"); + ret = PTR_ERR(th_zone->therm_dev); + goto err_unregister; + } + th_zone->mode = THERMAL_DEVICE_ENABLED; + + pr_info("Exynos: Kernel Thermal management registered\n"); + + return 0; + +err_unregister: + exynos_unregister_thermal(); + return ret; +} + +/* Un-Register with the in-kernel thermal management */ +void exynos_unregister_thermal(void) +{ + int i; + + if (!th_zone) + return; + + if (th_zone->therm_dev) + thermal_zone_device_unregister(th_zone->therm_dev); + + for (i = 0; i < th_zone->cool_dev_size; i++) { + if (th_zone->cool_dev[i]) + cpufreq_cooling_unregister(th_zone->cool_dev[i]); + } + + kfree(th_zone); + pr_info("Exynos: Kernel Thermal management unregistered\n"); +} diff --git a/drivers/thermal/samsung/exynos_thermal_common.h b/drivers/thermal/samsung/exynos_thermal_common.h new file mode 100644 index 00000000000..8df18486078 --- /dev/null +++ b/drivers/thermal/samsung/exynos_thermal_common.h @@ -0,0 +1,83 @@ +/* + * exynos_thermal_common.h - Samsung EXYNOS common header file + * + * Copyright (C) 2013 Samsung Electronics + * Amit Daniel Kachhap <amit.daniel@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#ifndef _EXYNOS_THERMAL_COMMON_H +#define _EXYNOS_THERMAL_COMMON_H + +/* In-kernel thermal framework related macros & definations */ +#define SENSOR_NAME_LEN 16 +#define MAX_TRIP_COUNT 8 +#define MAX_COOLING_DEVICE 4 +#define MAX_THRESHOLD_LEVS 4 + +#define ACTIVE_INTERVAL 500 +#define IDLE_INTERVAL 10000 +#define MCELSIUS 1000 + +/* CPU Zone information */ +#define PANIC_ZONE 4 +#define WARN_ZONE 3 +#define MONITOR_ZONE 2 +#define SAFE_ZONE 1 + +#define GET_ZONE(trip) (trip + 2) +#define GET_TRIP(zone) (zone - 2) + +#define EXYNOS_ZONE_COUNT 3 + +struct thermal_trip_point_conf { + int trip_val[MAX_TRIP_COUNT]; + int trip_count; + unsigned char trigger_falling; +}; + +struct thermal_cooling_conf { + struct freq_clip_table freq_data[MAX_TRIP_COUNT]; + int freq_clip_count; +}; + +struct thermal_sensor_conf { + char name[SENSOR_NAME_LEN]; + int (*read_temperature)(void *data); + int (*write_emul_temp)(void *drv_data, unsigned long temp); + struct thermal_trip_point_conf trip_data; + struct thermal_cooling_conf cooling_data; + void *private_data; +}; + +/*Functions used exynos based thermal sensor driver*/ +#ifdef CONFIG_EXYNOS_THERMAL_CORE +void exynos_unregister_thermal(void); +int exynos_register_thermal(struct thermal_sensor_conf *sensor_conf); +void exynos_report_trigger(void); +#else +static inline void +exynos_unregister_thermal(void) { return; } + +static inline int +exynos_register_thermal(struct thermal_sensor_conf *sensor_conf) { return 0; } + +static inline void +exynos_report_trigger(void) { return; } + +#endif /* CONFIG_EXYNOS_THERMAL_CORE */ +#endif /* _EXYNOS_THERMAL_COMMON_H */ |