On 20 June 2012 21:04, hongbo.zhang
<hongbo.zhang@linaro.org> wrote:
From: "hongbo.zhang" <hongbo.zhang@stericsson.com>
---
arch/arm/configs/u8500_defconfig | 4 +
arch/arm/mach-ux500/board-mop500.c | 71 ++++
drivers/thermal/Kconfig | 16 +
drivers/thermal/Makefile | 4 +-
drivers/thermal/cpu_cooling.c | 3 +-
drivers/thermal/db8500_cpufreq_cooling.c | 159 +++++++++
drivers/thermal/db8500_thermal.c | 445 ++++++++++++++++++++++++++
include/linux/platform_data/db8500_thermal.h | 39 +++
8 files changed, 738 insertions(+), 3 deletions(-)
create mode 100644 drivers/thermal/db8500_cpufreq_cooling.c
create mode 100755 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 4dc11da..ad6e7ab 100644
--- a/arch/arm/configs/u8500_defconfig
+++ b/arch/arm/configs/u8500_defconfig
@@ -118,3 +118,7 @@ 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 77d03c1..0c95bce 100644
--- a/arch/arm/mach-ux500/board-mop500.c
+++ b/arch/arm/mach-ux500/board-mop500.c
@@ -29,6 +29,7 @@
#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>
@@ -215,6 +216,74 @@ struct platform_device ab8500_device = {
};
/*
+ * Thermal Sensor
+ */
+
+#ifdef CONFIG_DB8500_THERMAL
+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,
+ },
+};
+#endif
+
+#ifdef CONFIG_DB8500_CPUFREQ_COOLING
+static struct platform_device u8500_cpufreq_cooling_device = {
+ .name = "db8500_cpufreq_cooling",
+};
+#endif
+/*
* TPS61052
*/
@@ -607,6 +676,8 @@ static struct platform_device *snowball_platform_devs[] __initdata = {
&snowball_key_dev,
&snowball_sbnet_dev,
&ab8500_device,
+ &u8500_thsens_device,
+ &u8500_cpufreq_cooling_device,
};
static void __init mop500_init_machine(void)
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index d9c529f..eeabe01 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -30,6 +30,22 @@ config CPU_THERMAL
and not the ACPI interface.
If you want this support, you should say Y or M here.
+config DB8500_THERMAL
+ tristate "db8500 thermal management"
+ depends on THERMAL
+ default y
+ help
+ Adds DB8500 thermal management implementation according to the thermal
+ management framework.
+
+config DB8500_CPUFREQ_COOLING
+ tristate "db8500 cpufreq cooling"
+ depends on CPU_THERMAL
+ default y
+ help
+ Adds DB8500 cpufreq cooling devices, and these cooling devicesd can be
+ binded to thermal zone device trip points.
+
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/cpu_cooling.c b/drivers/thermal/cpu_cooling.c
index c40d9a0..a8aa10f 100644
--- a/drivers/thermal/cpu_cooling.c
+++ b/drivers/thermal/cpu_cooling.c
@@ -399,8 +399,7 @@ struct thermal_cooling_device *cpufreq_cooling_register(
/*Verify that all the entries of freq_clip_table are present*/
for (i = 0; i < tab_size; i++) {
clip_tab = ((struct freq_clip_table *)&tab_ptr[i]);
- if (!clip_tab->freq_clip_max || !clip_tab->mask_val
- || !clip_tab->temp_level) {
+ if (!clip_tab->freq_clip_max || !clip_tab->mask_val) {
kfree(cpufreq_dev);
return ERR_PTR(-EINVAL);
}
diff --git a/drivers/thermal/db8500_cpufreq_cooling.c b/drivers/thermal/db8500_cpufreq_cooling.c
new file mode 100644
index 0000000..0dc2fcb
--- /dev/null
+++ b/drivers/thermal/db8500_cpufreq_cooling.c
@@ -0,0 +1,159 @@
+/*
+ * 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>
+
+#define CPU_FREQS_MAX 8
+#define CPU_CDEVS_MAX 8 /* should equal or larger than CPU_FREQS_MAX */
+
+static struct freq_clip_table db8500_clip_table[CPU_FREQS_MAX];
+static struct thermal_cooling_device *db8500_cool_devs[CPU_CDEVS_MAX];
+
+static int num_freqs;
+static int num_cdevs;
+
+static int cpufreq_table_create(void)
+{
+ struct cpufreq_frequency_table *table;
+ unsigned int freq_scratch[CPU_FREQS_MAX];
+ unsigned int temp;
+ int i, j, count = 0;
+
+ table = cpufreq_frequency_get_table(0);
+ if (!table)
+ return -EINVAL;
+
+ /* Check number of frequencies */
+ for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
+ if (table[i].frequency == CPUFREQ_ENTRY_INVALID)
+ continue;
+ count++;
+ }
+
+ if(unlikely(count > CPU_FREQS_MAX)) {
+ pr_err("CPU_FREQS_MAX is not large enough.\n");
+ return -EINVAL;
+ }
+ num_freqs = count;
+
+ /* Save frequencies */
+ count= 0;
+ memset(freq_scratch, 0, sizeof(freq_scratch));
+ for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
+ if (table[i].frequency == CPUFREQ_ENTRY_INVALID)
+ continue;
+ freq_scratch[count] = table[i].frequency;
+ count++;
+ }
+
+ /* Descending order frequencies */
+ for (i = 0; i <= num_freqs - 2; i++)
+ for (j = i + 1; j <= num_freqs - 1; j++)
+ if (freq_scratch[i] < freq_scratch[j]) {
+ temp = freq_scratch[i];
+ freq_scratch[i] = freq_scratch[j];
+ freq_scratch[j] = temp;
+ }
+
+ /* Create freq clip table */
+ memset(db8500_clip_table, 0, sizeof(db8500_clip_table));
+ for (i = 0; i < num_freqs; i++) {
+ db8500_clip_table[i].freq_clip_max = freq_scratch[i];
+ db8500_clip_table[i].mask_val = cpumask_of(0);
+ pr_info("db8500_clip_table %d: %d\n",i, db8500_clip_table[i].freq_clip_max);
+ }
+
+ return 0;
+}
+
+
+static int __devinit db8500_cpufreq_cooling_probe(struct platform_device *pdev)
+{
+ struct freq_clip_table *clip_data;
+ int i, count = 0;
+
+ if (cpufreq_table_create())
+ return -EINVAL;
+
+ memset(db8500_cool_devs, 0, sizeof(db8500_cool_devs));
+
+ /* Create one cooling device for each clip frequency */
+ for (i = 0; i < num_freqs; i++) {
+ clip_data = &(db8500_clip_table[i]);
+ db8500_cool_devs[i] = cpufreq_cooling_register(clip_data, 1);
+ if (!db8500_cool_devs[i]) {
+ pr_err("Failed to register cpufreq cooling device\n");
+ goto exit;
+ }
+ count++;
+ pr_info("Cooling device regestered: %s\n", db8500_cool_devs[i]->type);
+ }
+
+ num_cdevs = count;
+ return 0;
+
+exit:
+ for (i = 0; i < count; i++)
+ cpufreq_cooling_unregister(db8500_cool_devs[i]);
+
+ return -EINVAL;
+}
+
+static int __devexit db8500_cpufreq_cooling_remove(struct platform_device *pdev)
+{
+ int i;
+
+ for (i = 0; i < num_cdevs; i++)
+ cpufreq_cooling_unregister(db8500_cool_devs[i]);
+
+ 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 100755
index 0000000..7e85969
--- /dev/null
+++ b/drivers/thermal/db8500_thermal.c
@@ -0,0 +1,445 @@
+/*
+ * 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/compiler.h>
+#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;
+ enum thermal_device_mode mode;
+ struct mutex th_lock;
+ struct platform_device *thsens_pdev;
+ struct work_struct therm_work;
+ unsigned long cur_low;
+ unsigned long cur_high;
+ int low_irq;
+ int high_irq;
+};
+
+static struct db8500_thermal_zone *th_zone = NULL;
+
+/* 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;
+ int i, j, ret;
+
+ pzone = (struct db8500_thermal_zone *)thermal->devdata;
+ ptrips = pzone->thsens_pdev->dev.platform_data;
+
+ for (i = 0; i < ptrips->num_trips; i++)
+ for (j = 0; j < COOLING_DEV_MAX; j++)
+ if (ptrips->trip_points[i].cooling_dev_name[j] && cdev->type)
+ if (strcmp(ptrips->trip_points[i].cooling_dev_name[j], cdev->type) == 0) {
+ ret = thermal_zone_bind_cooling_device(thermal, i, cdev);
+ if (ret)
+ pr_err("Error binding cooling device.\n");
+ else
+ pr_info("Cooling device %s binded to trip point %d.\n", cdev->type, i);
+ }
+
+ schedule_work(&pzone->therm_work);
+ return 0;
+}
+
+/* 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;
+ int i, j, ret;
+
+ pzone = (struct db8500_thermal_zone *)thermal->devdata;
+ ptrips = pzone->thsens_pdev->dev.platform_data;
+
+ for (i = 0; i < ptrips->num_trips; i++)
+ for (j = 0; j < COOLING_DEV_MAX; j++)
+ if (ptrips->trip_points[i].cooling_dev_name[j] && cdev->type)
+ if (strcmp(ptrips->trip_points[i].cooling_dev_name[j], cdev->type) == 0) {
+ ret = thermal_zone_unbind_cooling_device(thermal, i, cdev);
+ if (ret)
+ pr_err("Error unbinding cooling device.\n");
+ else
+ pr_info("Cooling device %s unbinded from trip point %d.\n", cdev->type, i);
+ }
+
+ return 0;
+}
+
+/* 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;
+
+ /* There is no PRCMU interface to get temperature data currently,
+ so just returns temperature between two trip points, it works for the thermal framework
+ and this will be fixed when the PRCMU interface to get temperature is available */
+ *temp = (pzone->cur_high + pzone->cur_low)/2;
+
+ 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_warning("Thermal function already started.\n");
+ } else {
+ if (pzone->mode == THERMAL_DEVICE_ENABLED)
+ pr_info("Thermal function stoped.\n");
+ else
+ pr_warning("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->thsens_pdev->dev.platform_data;
+
+ 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->thsens_pdev->dev.platform_data;
+
+ 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->thsens_pdev->dev.platform_data;
+
+ 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;
+ int i;
+
+ ptrips = pzone->thsens_pdev->dev.platform_data;
+
+ for(i = 0; i < ptrips->num_trips; i++) {
+ if (pzone->cur_high == ptrips->trip_points[i].temp)
+ break;
+ }
+
+ if (i <= 1) {
+ next_high = ptrips->trip_points[0].temp;
+ next_low = PRCMU_DEFAULT_LOW_TEMP;
+ } else {
+ next_high = ptrips->trip_points[i-1].temp;
+ next_low = ptrips->trip_points[i-2].temp;
+ }
+
+ (void) prcmu_stop_temp_sense();
+ (void) prcmu_config_hotmon((u8)(next_low/1000), (u8)(next_high/1000));
+ (void) prcmu_start_temp_sense(PRCMU_DEFAULT_MEASURE_TIME);
+
+ pzone->cur_high = next_high;
+ pzone->cur_low = next_low;
+ 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;
+ int i;
+
+ ptrips = pzone->thsens_pdev->dev.platform_data;
+
+ for(i = 0; i < ptrips->num_trips; i++) {
+ if (pzone->cur_high == ptrips->trip_points[i].temp)
+ break;
+ }
+
+ /* not likely over critial trip temp, e.g. i < ptrips->num_trips-1 here */
+ next_high = ptrips->trip_points[i+1].temp;
+ next_low = ptrips->trip_points[i].temp;
+
+ (void) prcmu_stop_temp_sense();
+ (void) prcmu_config_hotmon((u8)(next_low/1000), (u8)(next_high/1000));
+ (void) prcmu_start_temp_sense(PRCMU_DEFAULT_MEASURE_TIME);
+
+ pzone->cur_high = next_high;
+ pzone->cur_low = next_low;
+ pr_debug("PRCMU set max %ld, set min %ld\n", next_high, next_low);
+
+ 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 = kzalloc(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");
+ goto exit_irq;
+ }
+
+ ret = request_threaded_irq(low_irq, NULL, prcmu_low_irq_handler,
+ IRQF_NO_SUSPEND, "dbx500_temp_low", pzone);
+ if (ret < 0) {
+ pr_err("Failed to allocate temp low irq.\n");
+ goto exit_irq;
+ }
+
+ high_irq = platform_get_irq_byname(pdev, "IRQ_HOTMON_HIGH");
+ if (high_irq < 0) {
+ pr_err("Get IRQ_HOTMON_HIGH failed.\n");
+ goto exit_irq;
+ }
+
+ ret = request_threaded_irq(high_irq, NULL, prcmu_high_irq_handler,
+ IRQF_NO_SUSPEND, "dbx500_temp_high", pzone);
+ if (ret < 0) {
+ pr_err("Failed to allocate temp high irq.\n");
+ goto exit_irq;
+ }
+
+ pzone->low_irq = low_irq;
+ pzone->high_irq = high_irq;
+
+ ptrips = (struct db8500_thsens_platform_data *)pdev->dev.platform_data;
+
+ 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");
+ ret = -EINVAL;
+ goto exit_th;
+ }
+
+ mutex_init(&pzone->th_lock);
+
+ INIT_WORK(&pzone->therm_work, db8500_thermal_work);
+
+ /* PRCMU initialize */
+ dft_low = PRCMU_DEFAULT_LOW_TEMP;
+ dft_high = (ptrips->trip_points[0].temp);
+
+ (void) prcmu_stop_temp_sense();
+ (void) prcmu_config_hotmon((u8)(dft_low/1000), (u8)(dft_high/1000));
+ (void) prcmu_start_temp_sense(PRCMU_DEFAULT_MEASURE_TIME);
+
+ pzone->cur_low = dft_low;
+ pzone->cur_high = dft_high;
+ pzone->mode = THERMAL_DEVICE_ENABLED;
+
+ th_zone = pzone;
+ return 0;
+
+exit_th:
+ if (pzone->therm_dev)
+ thermal_zone_device_unregister(pzone->therm_dev);
+
+exit_irq:
+ if (pzone->low_irq > 0)
+ free_irq(pzone->low_irq, pzone);
+ if (pzone->low_irq > 0)
+ free_irq(pzone->high_irq, pzone);
+
+ kfree(pzone);
+ return ret;
+}
+
+static int __devexit db8500_thermal_remove(struct platform_device *pdev)
+{
+ struct db8500_thermal_zone *pzone = th_zone;
+
+ if (pzone && pzone->therm_dev)
+ thermal_zone_device_unregister(pzone->therm_dev);
+ if (pzone && pzone->low_irq)
+ free_irq(pzone->low_irq, pzone);
+ if (pzone && pzone->high_irq)
+ free_irq(pzone->high_irq, pzone);
+ if (pzone)
+ kfree(pzone);
+
+ return 0;
+}
+
+/* No actions required in suspend/resume, so lack of them */
+static struct platform_driver db8500_thermal_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "db8500_thermal"
+ },
+ .probe = db8500_thermal_probe,
+ .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