On 13 July 2012 15:51, hongbo.zhang
<hongbo.zhang@linaro.org> wrote:
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_ */
--
1.7.10