On 20 June 2012 15:04, hongbo.zhang <hongbo.zh...@linaro.org> wrote:
> From: "hongbo.zhang" <hongbo.zh...@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) {
please make a separate patch for this modification
> 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.zh...@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);
cpumask_of(0) is false because both cpu are linked for their frequency
use cpu_present_mask instead
> + 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));
could you dynamically allocate db8500_cool_dev and db8500_clip_table
based on the count result that has been done in cpufreq_table_create
function
more generally speaking, could you prevent using "global" variable ?
db8500_cool_devs, db8500_clip_table, num_freqs and num_cdevs should be
linked with your driver and not a static variabale
> +
> + /* 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.zh...@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.zh...@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.zh...@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.zh...@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
>
>
> _______________________________________________
> linaro-dev mailing list
> linaro-dev@lists.linaro.org
> http://lists.linaro.org/mailman/listinfo/linaro-dev
_______________________________________________
linaro-dev mailing list
linaro-dev@lists.linaro.org
http://lists.linaro.org/mailman/listinfo/linaro-dev
