From: "hongbo.zhang" hongbo.zhang@stericsson.com
Signed-off-by: hongbo.zhang hongbo.zhang@linaro.com --- arch/arm/configs/u8500_defconfig | 4 + arch/arm/mach-ux500/board-mop500.c | 69 ++++ drivers/thermal/Kconfig | 20 ++ drivers/thermal/Makefile | 4 +- drivers/thermal/db8500_cpufreq_cooling.c | 167 +++++++++ drivers/thermal/db8500_thermal.c | 476 ++++++++++++++++++++++++++ include/linux/platform_data/db8500_thermal.h | 39 +++ 7 files changed, 778 insertions(+), 1 deletion(-) create mode 100644 drivers/thermal/db8500_cpufreq_cooling.c create mode 100644 drivers/thermal/db8500_thermal.c create mode 100644 include/linux/platform_data/db8500_thermal.h
diff --git a/arch/arm/configs/u8500_defconfig b/arch/arm/configs/u8500_defconfig index 036419f..15a455e 100644 --- a/arch/arm/configs/u8500_defconfig +++ b/arch/arm/configs/u8500_defconfig @@ -117,3 +117,7 @@ CONFIG_DEBUG_KERNEL=y CONFIG_DEBUG_INFO=y # CONFIG_FTRACE is not set CONFIG_DEBUG_USER=y +CONFIG_THERMAL=y +CONFIG_CPU_THERMAL=y +CONFIG_DB8500_THERMAL=y +CONFIG_DB8500_CPUFREQ_COOLING=y diff --git a/arch/arm/mach-ux500/board-mop500.c b/arch/arm/mach-ux500/board-mop500.c index 1509a3c..77b3fca 100644 --- a/arch/arm/mach-ux500/board-mop500.c +++ b/arch/arm/mach-ux500/board-mop500.c @@ -30,6 +30,8 @@ #include <linux/smsc911x.h> #include <linux/gpio_keys.h> #include <linux/delay.h> +#include <linux/platform_data/db8500_thermal.h> + #include <linux/of.h> #include <linux/of_platform.h> #include <linux/leds.h> @@ -216,6 +218,71 @@ struct platform_device ab8500_device = { };
/* + * Thermal Sensor + */ + +static struct resource db8500_thsens_resources[] = { + { + .name = "IRQ_HOTMON_LOW", + .start = IRQ_PRCMU_HOTMON_LOW, + .end = IRQ_PRCMU_HOTMON_LOW, + .flags = IORESOURCE_IRQ, + }, + { + .name = "IRQ_HOTMON_HIGH", + .start = IRQ_PRCMU_HOTMON_HIGH, + .end = IRQ_PRCMU_HOTMON_HIGH, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct db8500_trip_point db8500_trips_table[] = { + [0] = { + .temp = 70000, + .type = THERMAL_TRIP_ACTIVE, + .cooling_dev_name = { + [0] = "thermal-cpufreq-0", + }, + }, + [1] = { + .temp = 75000, + .type = THERMAL_TRIP_ACTIVE, + .cooling_dev_name = { + [0] = "thermal-cpufreq-1", + }, + }, + [2] = { + .temp = 80000, + .type = THERMAL_TRIP_ACTIVE, + .cooling_dev_name = { + [0] = "thermal-cpufreq-2", + }, + }, + [3] = { + .temp = 85000, + .type = THERMAL_TRIP_CRITICAL, + }, +}; + +static struct db8500_thsens_platform_data db8500_thsens_data = { + .trip_points = db8500_trips_table, + .num_trips = ARRAY_SIZE(db8500_trips_table), +}; + +static struct platform_device u8500_thsens_device = { + .name = "db8500_thermal", + .resource = db8500_thsens_resources, + .num_resources = ARRAY_SIZE(db8500_thsens_resources), + .dev = { + .platform_data = &db8500_thsens_data, + }, +}; + +static struct platform_device u8500_cpufreq_cooling_device = { + .name = "db8500_cpufreq_cooling", +}; + +/* * TPS61052 */
@@ -623,6 +690,8 @@ static struct platform_device *snowball_platform_devs[] __initdata = { &snowball_key_dev, &snowball_sbnet_dev, &ab8500_device, + &u8500_thsens_device, + &u8500_cpufreq_cooling_device, };
static struct platform_device *snowball_of_platform_devs[] __initdata = { diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index d9c529f..5482116 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -30,6 +30,26 @@ config CPU_THERMAL and not the ACPI interface. If you want this support, you should say Y or M here.
+config DB8500_THERMAL + bool "db8500 thermal management" + depends on THERMAL + default y + help + Adds DB8500 thermal management implementation according to the thermal + management framework. A thermal zone with several trip points will be + created. Cooling devices can be binded to the trip points to cool this + thermal zone if trip points reached. + +config DB8500_CPUFREQ_COOLING + tristate "db8500 cpufreq cooling" + depends on CPU_THERMAL + default y + help + Adds DB8500 cpufreq cooling devices, and these cooling devices can be + binded to thermal zone trip points. When a trip point reached, the + binded cpufreq cooling device turns active to set CPU frequency low to + cool down the CPU. + config SPEAR_THERMAL bool "SPEAr thermal sensor driver" depends on THERMAL diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 30c456c..d146456 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -3,5 +3,7 @@ #
obj-$(CONFIG_THERMAL) += thermal_sys.o -obj-$(CONFIG_CPU_THERMAL) += cpu_cooling.o +obj-$(CONFIG_CPU_THERMAL) += cpu_cooling.o +obj-$(CONFIG_DB8500_THERMAL) += db8500_thermal.o +obj-$(CONFIG_DB8500_CPUFREQ_COOLING) +=db8500_cpufreq_cooling.o obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o diff --git a/drivers/thermal/db8500_cpufreq_cooling.c b/drivers/thermal/db8500_cpufreq_cooling.c new file mode 100644 index 0000000..2c2c91b --- /dev/null +++ b/drivers/thermal/db8500_cpufreq_cooling.c @@ -0,0 +1,167 @@ +/* + * db8500_cpufreq_cooling.c - db8500 cpufreq works as cooling device. + * + * Copyright (C) 2012 ST-Ericsson + * Copyright (C) 2012 Linaro Ltd. + * + * Author: Hongbo Zhang hognbo.zhang@stericsson.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. + * + */ + +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/cpufreq.h> +#include <linux/cpu_cooling.h> +#include <linux/err.h> + +static LIST_HEAD(db8500_cpufreq_cdev_list); + +struct db8500_cpufreq_cdev { + struct thermal_cooling_device *cdev; + struct list_head node; +}; + +/* Local function to create cpufreq clip table */ +static int cpufreq_table_create(struct platform_device *pdev, + struct freq_clip_table **freq_tab, int *num_freq) +{ + struct cpufreq_frequency_table *table; + struct freq_clip_table *freq_clip; + unsigned int temp; + int i, j, count = 0; + + table = cpufreq_frequency_get_table(0); + if (!table) + return -ENODATA; + + /* Check number of frequencies */ + for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { + if (table[i].frequency == CPUFREQ_ENTRY_INVALID) + continue; + count++; + } + + freq_clip = devm_kzalloc(&pdev->dev, + sizeof(struct freq_clip_table) * count, GFP_KERNEL); + + /* Save frequencies */ + count = 0; + for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) { + if (table[i].frequency == CPUFREQ_ENTRY_INVALID) + continue; + freq_clip[count].freq_clip_max = table[i].frequency; + count++; + } + + /* Descending order frequencies */ + for (i = 0; i <= count - 2; i++) + for (j = i + 1; j <= count - 1; j++) + if (freq_clip[i].freq_clip_max < freq_clip[j].freq_clip_max) { + temp = freq_clip[i].freq_clip_max; + freq_clip[i].freq_clip_max = freq_clip[j].freq_clip_max; + freq_clip[j].freq_clip_max = temp; + } + + for (i = 0; i < count; i++) { + freq_clip[i].mask_val = cpu_present_mask; + pr_info("db8500_clip_table.%d: %d\n", i, + freq_clip[i].freq_clip_max); + } + + *freq_tab = freq_clip; + *num_freq = count; + + return 0; +} + +static int __devinit db8500_cpufreq_cooling_probe(struct platform_device *pdev) +{ + struct freq_clip_table *freq_tab = NULL; + struct db8500_cpufreq_cdev *cooling_devs; + int i, ret, num_freq = 0; + + if (cpufreq_table_create(pdev, &freq_tab, &num_freq)) + return -ENODATA; + + if (unlikely(!freq_tab || !num_freq)) + return -ENODATA; + + /* Create one cooling device for each clip frequency */ + for (i = 0; i < num_freq; i++) { + cooling_devs = devm_kzalloc(&pdev->dev, + sizeof(struct db8500_cpufreq_cdev), GFP_KERNEL); + if (!cooling_devs) { + ret = -ENOMEM; + goto exit; + } + + cooling_devs->cdev = cpufreq_cooling_register(&freq_tab[i], 1); + + if (IS_ERR(cooling_devs->cdev)) { + pr_err("Failed to register cpufreq cooling device\n"); + ret = PTR_ERR(cooling_devs->cdev); + goto exit; + } + + list_add_tail(&cooling_devs->node, &db8500_cpufreq_cdev_list); + pr_info("Cooling device regestered: %s\n", + cooling_devs->cdev->type); + } + + return 0; + +exit: + list_for_each_entry(cooling_devs, &db8500_cpufreq_cdev_list, node) + cpufreq_cooling_unregister(cooling_devs->cdev); + + return ret; +} + +static int __devexit db8500_cpufreq_cooling_remove(struct platform_device *pdev) +{ + struct db8500_cpufreq_cdev *cooling_devs; + + list_for_each_entry(cooling_devs, &db8500_cpufreq_cdev_list, node) + cpufreq_cooling_unregister(cooling_devs->cdev); + + return 0; +} + +/* No actions required in suspend/resume, so lack of them */ +static struct platform_driver db8500_cpufreq_cooling_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "db8500_cpufreq_cooling", + }, + .probe = db8500_cpufreq_cooling_probe, + .remove = __devexit_p(db8500_cpufreq_cooling_remove), +}; + +static int __init db8500_cpufreq_cooling_init(void) +{ + return platform_driver_register(&db8500_cpufreq_cooling_driver); +} + +static void __exit db8500_cpufreq_cooling_exit(void) +{ + platform_driver_unregister(&db8500_cpufreq_cooling_driver); +} + +/* Should be later than db8500_cpufreq_register */ +late_initcall(db8500_cpufreq_cooling_init); +module_exit(db8500_cpufreq_cooling_exit); + +MODULE_AUTHOR("Hongbo Zhang hongbo.zhang@stericsson.com"); +MODULE_DESCRIPTION("db8500 cpufreq cooling driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/thermal/db8500_thermal.c b/drivers/thermal/db8500_thermal.c new file mode 100644 index 0000000..32afaeb --- /dev/null +++ b/drivers/thermal/db8500_thermal.c @@ -0,0 +1,476 @@ +/* + * db8500_thermal.c - db8500 Thermal Management Implementation + * + * Copyright (C) 2012 ST-Ericsson + * Copyright (C) 2012 Linaro Ltd. + * + * Author: Hongbo Zhang hognbo.zhang@stericsson.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. + * + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/thermal.h> +#include <linux/cpu_cooling.h> +#include <linux/mfd/dbx500-prcmu.h> +#include <linux/platform_data/db8500_thermal.h> + +#define PRCMU_DEFAULT_MEASURE_TIME 0xFFF +#define PRCMU_DEFAULT_LOW_TEMP 0 + +struct db8500_thermal_zone { + struct thermal_zone_device *therm_dev; + struct mutex th_lock; + struct platform_device *thsens_pdev; + struct work_struct therm_work; + struct db8500_thsens_platform_data *trip_tab; + enum thermal_device_mode mode; + unsigned long cur_temp_pseudo; + unsigned int cur_index; + int low_irq; + int high_irq; +}; + +/* Bind callback functions for thermal zone */ +static int db8500_cdev_bind(struct thermal_zone_device *thermal, + struct thermal_cooling_device *cdev) +{ + struct db8500_thermal_zone *pzone; + struct db8500_thsens_platform_data *ptrips; + char *cdev_name; + int i, j, ret; + + pzone = (struct db8500_thermal_zone *)thermal->devdata; + ptrips = pzone->trip_tab; + + if (!cdev->type) + return -EINVAL; + + ret = -ENODEV; + for (i = 0; i < ptrips->num_trips; i++) + for (j = 0; j < COOLING_DEV_MAX; j++) { + cdev_name = ptrips->trip_points[i].cooling_dev_name[j]; + if (!cdev_name) + continue; + + if (strcmp(cdev_name, cdev->type)) + continue; + + ret = thermal_zone_bind_cooling_device(thermal, i, cdev); + if (ret) + pr_err("Error binding cooling device.\n"); + else + pr_info("%s binded to %d.\n", cdev->type, i); + } + + /* Force an update since polling mode is not used */ + schedule_work(&pzone->therm_work); + + return ret; +} + +/* Unbind callback functions for thermal zone */ +static int db8500_cdev_unbind(struct thermal_zone_device *thermal, + struct thermal_cooling_device *cdev) +{ + struct db8500_thermal_zone *pzone; + struct db8500_thsens_platform_data *ptrips; + char *cdev_name; + int i, j, ret; + + pzone = (struct db8500_thermal_zone *)thermal->devdata; + ptrips = pzone->trip_tab; + + if (!cdev->type) + return -EINVAL; + + ret = -ENODEV; + for (i = 0; i < ptrips->num_trips; i++) + for (j = 0; j < COOLING_DEV_MAX; j++) { + cdev_name = ptrips->trip_points[i].cooling_dev_name[j]; + if (!cdev_name) + continue; + + if (strcmp(cdev_name, cdev->type)) + continue; + + /* Invalidate the cooling device before unbinding it */ + if (cdev->ops->set_cur_state) + cdev->ops->set_cur_state(cdev, 0); + + ret = thermal_zone_unbind_cooling_device(thermal, i, cdev); + if (ret) + pr_err("Error unbinding cooling device.\n"); + else + pr_info("%s unbinded from %d.\n", cdev->type, i); + } + + return ret; +} + +/* Get temperature callback functions for thermal zone */ +static int db8500_sys_get_temp(struct thermal_zone_device *thermal, + unsigned long *temp) +{ + struct db8500_thermal_zone *pzone; + + pzone = (struct db8500_thermal_zone *)thermal->devdata; + + /* TODO: There is no PRCMU interface to get temperature data currently, + so a pseudo temperature is returned , it works for the thermal framework + and this will be fixed when the PRCMU interface is available */ + *temp = pzone->cur_temp_pseudo; + + return 0; +} + +/* Get mode callback functions for thermal zone */ +static int db8500_sys_get_mode(struct thermal_zone_device *thermal, + enum thermal_device_mode *mode) +{ + struct db8500_thermal_zone *pzone; + pzone = (struct db8500_thermal_zone *)thermal->devdata; + + mutex_lock(&pzone->th_lock); + *mode = pzone->mode; + mutex_unlock(&pzone->th_lock); + + return 0; +} + +/* Set mode callback functions for thermal zone */ +static int db8500_sys_set_mode(struct thermal_zone_device *thermal, + enum thermal_device_mode mode) +{ + struct db8500_thermal_zone *pzone; + struct thermal_zone_device *pthdev; + + pzone = (struct db8500_thermal_zone *)thermal->devdata; + pthdev = pzone->therm_dev; + + if (!pthdev) { + pr_err("Thermal zone not registered.\n"); + return 0; + } + + mutex_lock(&pzone->th_lock); + if (mode == THERMAL_DEVICE_ENABLED) { + if (pzone->mode == THERMAL_DEVICE_DISABLED) + pr_info("Thermal function started.\n"); + else + pr_info("Thermal function already started.\n"); + } else { + if (pzone->mode == THERMAL_DEVICE_ENABLED) + pr_info("Thermal function stoped.\n"); + else + pr_info("Thermal function already stoped.\n"); + } + pzone->mode = mode; + mutex_unlock(&pzone->th_lock); + + return 0; +} + +/* Get trip type callback function for thermal zone */ +static int db8500_sys_get_trip_type(struct thermal_zone_device *thermal, + int trip, enum thermal_trip_type *type) +{ + struct db8500_thermal_zone *pzone; + struct db8500_thsens_platform_data *ptrips; + + pzone = (struct db8500_thermal_zone *)thermal->devdata; + ptrips = pzone->trip_tab; + + if (trip >= ptrips->num_trips) + return -EINVAL; + + *type = ptrips->trip_points[trip].type; + + return 0; +} + +/* Get trip temperature callback function for thermal zone */ +static int db8500_sys_get_trip_temp(struct thermal_zone_device *thermal, + int trip, unsigned long *temp) +{ + struct db8500_thermal_zone *pzone; + struct db8500_thsens_platform_data *ptrips; + + pzone = (struct db8500_thermal_zone *)thermal->devdata; + ptrips = pzone->trip_tab; + + if (trip >= ptrips->num_trips) + return -EINVAL; + + *temp = ptrips->trip_points[trip].temp; + + return 0; +} + +/* Get critical temperature callback function for thermal zone */ +static int db8500_sys_get_crit_temp(struct thermal_zone_device *thermal, + unsigned long *temp) +{ + struct db8500_thermal_zone *pzone; + struct db8500_thsens_platform_data *ptrips; + int i; + + pzone = (struct db8500_thermal_zone *)thermal->devdata; + ptrips = pzone->trip_tab; + + for (i = (ptrips->num_trips - 1) ; i > 0 ; i--) { + if (ptrips->trip_points[i].type == THERMAL_TRIP_CRITICAL) { + *temp = ptrips->trip_points[i].temp; + return 0; + } + } + + return -EINVAL; +} + +static struct thermal_zone_device_ops thdev_ops = { + .bind = db8500_cdev_bind, + .unbind = db8500_cdev_unbind, + .get_temp = db8500_sys_get_temp, + .get_mode = db8500_sys_get_mode, + .set_mode = db8500_sys_set_mode, + .get_trip_type = db8500_sys_get_trip_type, + .get_trip_temp = db8500_sys_get_trip_temp, + .get_crit_temp = db8500_sys_get_crit_temp, +}; + +static irqreturn_t prcmu_low_irq_handler(int irq, void *irq_data) +{ + struct db8500_thermal_zone *pzone = irq_data; + struct db8500_thsens_platform_data *ptrips; + unsigned long next_low, next_high; + unsigned int idx; + + ptrips = pzone->trip_tab; + idx = pzone->cur_index; + if (unlikely(idx == 0)) + /* Meaningless for thermal management, ignoring it */ + return IRQ_HANDLED; + + if (idx == 1) { + next_high = ptrips->trip_points[0].temp; + next_low = PRCMU_DEFAULT_LOW_TEMP; + } else { + next_high = ptrips->trip_points[idx-1].temp; + next_low = ptrips->trip_points[idx-2].temp; + } + + pzone->cur_index -= 1; + pzone->cur_temp_pseudo = (next_high + next_low)/2; + + prcmu_stop_temp_sense(); + prcmu_config_hotmon((u8)(next_low/1000), (u8)(next_high/1000)); + prcmu_start_temp_sense(PRCMU_DEFAULT_MEASURE_TIME); + + pr_debug("PRCMU set max %ld, set min %ld\n", next_high, next_low); + + schedule_work(&pzone->therm_work); + + return IRQ_HANDLED; +} + +static irqreturn_t prcmu_high_irq_handler(int irq, void *irq_data) +{ + struct db8500_thermal_zone *pzone = irq_data; + struct db8500_thsens_platform_data *ptrips; + unsigned long next_low, next_high; + unsigned int idx; + + ptrips = pzone->trip_tab; + idx = pzone->cur_index; + + if (idx < ptrips->num_trips - 1) { + next_high = ptrips->trip_points[idx+1].temp; + next_low = ptrips->trip_points[idx].temp; + + pzone->cur_index += 1; + pzone->cur_temp_pseudo = (next_high + next_low)/2; + + prcmu_stop_temp_sense(); + prcmu_config_hotmon((u8)(next_low/1000), (u8)(next_high/1000)); + prcmu_start_temp_sense(PRCMU_DEFAULT_MEASURE_TIME); + + pr_debug("PRCMU set max %ld, min %ld\n", next_high, next_low); + } + + if (idx == ptrips->num_trips - 1) + pzone->cur_temp_pseudo = ptrips->trip_points[idx].temp + 1; + + schedule_work(&pzone->therm_work); + + return IRQ_HANDLED; +} + +static void db8500_thermal_work(struct work_struct *work) +{ + enum thermal_device_mode cur_mode; + struct db8500_thermal_zone *pzone; + + pzone = container_of(work, struct db8500_thermal_zone, therm_work); + + mutex_lock(&pzone->th_lock); + cur_mode = pzone->mode; + mutex_unlock(&pzone->th_lock); + + if (cur_mode == THERMAL_DEVICE_DISABLED) { + pr_warn("Warning: thermal function disabled.\n"); + return; + } + + thermal_zone_device_update(pzone->therm_dev); + pr_debug("db8500_thermal_work finished.\n"); +} + +static int __devinit db8500_thermal_probe(struct platform_device *pdev) +{ + struct db8500_thermal_zone *pzone = NULL; + struct db8500_thsens_platform_data *ptrips; + int low_irq, high_irq, ret = 0; + unsigned long dft_low, dft_high; + + pr_info("Function db8500_thermal_probe.\n"); + + pzone = devm_kzalloc(&pdev->dev, + sizeof(struct db8500_thermal_zone), GFP_KERNEL); + if (!pzone) + return -ENOMEM; + + pzone->thsens_pdev = pdev; + + low_irq = platform_get_irq_byname(pdev, "IRQ_HOTMON_LOW"); + if (low_irq < 0) { + pr_err("Get IRQ_HOTMON_LOW failed.\n"); + return low_irq; + } + + ret = devm_request_threaded_irq(&pdev->dev, low_irq, NULL, + prcmu_low_irq_handler, + IRQF_NO_SUSPEND | IRQF_ONESHOT, "dbx500_temp_low", pzone); + if (ret < 0) { + pr_err("Failed to allocate temp low irq.\n"); + return ret; + } + + high_irq = platform_get_irq_byname(pdev, "IRQ_HOTMON_HIGH"); + if (high_irq < 0) { + pr_err("Get IRQ_HOTMON_HIGH failed.\n"); + return high_irq; + } + + ret = devm_request_threaded_irq(&pdev->dev, high_irq, NULL, + prcmu_high_irq_handler, + IRQF_NO_SUSPEND | IRQF_ONESHOT, "dbx500_temp_high", pzone); + if (ret < 0) { + pr_err("Failed to allocate temp high irq.\n"); + return ret; + } + + pzone->low_irq = low_irq; + pzone->high_irq = high_irq; + + pzone->mode = THERMAL_DEVICE_DISABLED; + + mutex_init(&pzone->th_lock); + + INIT_WORK(&pzone->therm_work, db8500_thermal_work); + + ptrips = pdev->dev.platform_data; + pzone->trip_tab = ptrips; + + pzone->therm_dev = thermal_zone_device_register("db8500_thermal_zone", + ptrips->num_trips, pzone, &thdev_ops, 0, 0, 0, 0); + + if (IS_ERR(pzone->therm_dev)) { + pr_err("Failed to register thermal zone device\n"); + return PTR_ERR(pzone->therm_dev); + } + + dft_low = PRCMU_DEFAULT_LOW_TEMP; + dft_high = ptrips->trip_points[0].temp; + + prcmu_stop_temp_sense(); + prcmu_config_hotmon((u8)(dft_low/1000), (u8)(dft_high/1000)); + prcmu_start_temp_sense(PRCMU_DEFAULT_MEASURE_TIME); + + pzone->cur_index = 0; + pzone->cur_temp_pseudo = (dft_low + dft_high)/2; + + pzone->mode = THERMAL_DEVICE_ENABLED; + + platform_set_drvdata(pdev, pzone); + + return 0; +} + +static int __devexit db8500_thermal_remove(struct platform_device *pdev) +{ + struct db8500_thermal_zone *pzone; + pzone = platform_get_drvdata(pdev); + + cancel_work_sync(&pzone->therm_work); + + if (pzone->therm_dev) + thermal_zone_device_unregister(pzone->therm_dev); + + return 0; +} + +static int db8500_thermal_suspend(struct platform_device *pdev, + pm_message_t state) +{ + struct db8500_thermal_zone *pzone; + pzone = platform_get_drvdata(pdev); + + flush_work_sync(&pzone->therm_work); + return 0; +} + +static int db8500_thermal_resume(struct platform_device *pdev) +{ + return 0; +} + +static struct platform_driver db8500_thermal_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "db8500_thermal" + }, + .probe = db8500_thermal_probe, + .suspend = db8500_thermal_suspend, + .resume = db8500_thermal_resume, + .remove = __devexit_p(db8500_thermal_remove), +}; + +static int __init db8500_thermal_init(void) +{ + return platform_driver_register(&db8500_thermal_driver); +} + +static void __exit db8500_thermal_exit(void) +{ + platform_driver_unregister(&db8500_thermal_driver); +} + +module_init(db8500_thermal_init); +module_exit(db8500_thermal_exit); + +MODULE_AUTHOR("Hongbo Zhang hongbo.zhang@stericsson.com"); +MODULE_DESCRIPTION("db8500 thermal driver"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/platform_data/db8500_thermal.h b/include/linux/platform_data/db8500_thermal.h new file mode 100644 index 0000000..0b6d164 --- /dev/null +++ b/include/linux/platform_data/db8500_thermal.h @@ -0,0 +1,39 @@ +/* + * db8500_thermal.h - db8500 Thermal Management Implementation + * + * Copyright (C) 2012 ST-Ericsson + * Copyright (C) 2012 Linaro Ltd. + * + * Author: Hongbo Zhang hognbo.zhang@stericsson.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. + * + */ + +#ifndef _DB8500_THERMAL_H_ +#define _DB8500_THERMAL_H_ + +#include <linux/thermal.h> + +#define COOLING_DEV_MAX 8 + +struct db8500_trip_point { + unsigned long temp; + enum thermal_trip_type type; + char *cooling_dev_name[COOLING_DEV_MAX]; +}; + +struct db8500_thsens_platform_data { + struct db8500_trip_point *trip_points; + int num_trips; +}; + +#endif /* _DB8500_THERMAL_H_ */