+++ /dev/null
-Kernel driver exynos4_tmu
-=================
-
-Supported chips:
-* ARM SAMSUNG EXYNOS4 series of SoC
- Prefix: 'exynos4-tmu'
- Datasheet: Not publicly available
-
-Authors: Donggeun Kim <dg77.kim@samsung.com>
-
-Description
------------
-
-This driver allows to read temperature inside SAMSUNG EXYNOS4 series of SoC.
-
-The chip only exposes the measured 8-bit temperature code value
-through a register.
-Temperature can be taken from the temperature code.
-There are three equations converting from temperature to temperature code.
-
-The three equations are:
- 1. Two point trimming
- Tc = (T - 25) * (TI2 - TI1) / (85 - 25) + TI1
-
- 2. One point trimming
- Tc = T + TI1 - 25
-
- 3. No trimming
- Tc = T + 50
-
- Tc: Temperature code, T: Temperature,
- TI1: Trimming info for 25 degree Celsius (stored at TRIMINFO register)
- Temperature code measured at 25 degree Celsius which is unchanged
- TI2: Trimming info for 85 degree Celsius (stored at TRIMINFO register)
- Temperature code measured at 85 degree Celsius which is unchanged
-
-TMU(Thermal Management Unit) in EXYNOS4 generates interrupt
-when temperature exceeds pre-defined levels.
-The maximum number of configurable threshold is four.
-The threshold levels are defined as follows:
- Level_0: current temperature > trigger_level_0 + threshold
- Level_1: current temperature > trigger_level_1 + threshold
- Level_2: current temperature > trigger_level_2 + threshold
- Level_3: current temperature > trigger_level_3 + threshold
-
- The threshold and each trigger_level are set
- through the corresponding registers.
-
-When an interrupt occurs, this driver notify user space of
-one of four threshold levels for the interrupt
-through kobject_uevent_env and sysfs_notify functions.
-Although an interrupt condition for level_0 can be set,
-it is not notified to user space through sysfs_notify function.
-
-Sysfs Interface
----------------
-name name of the temperature sensor
- RO
-
-temp1_input temperature
- RO
-
-temp1_max temperature for level_1 interrupt
- RO
-
-temp1_crit temperature for level_2 interrupt
- RO
-
-temp1_emergency temperature for level_3 interrupt
- RO
-
-temp1_max_alarm alarm for level_1 interrupt
- RO
-
-temp1_crit_alarm
- alarm for level_2 interrupt
- RO
-
-temp1_emergency_alarm
- alarm for level_3 interrupt
- RO
--- /dev/null
+CPU cooling APIs How To
+===================================
+
+Written by Amit Daniel Kachhap <amit.kachhap@linaro.org>
+
+Updated: 12 May 2012
+
+Copyright (c) 2012 Samsung Electronics Co., Ltd(http://www.samsung.com)
+
+0. Introduction
+
+The generic cpu cooling(freq clipping) provides registration/unregistration APIs
+to the caller. The binding of the cooling devices to the trip point is left for
+the user. The registration APIs returns the cooling device pointer.
+
+1. cpu cooling APIs
+
+1.1 cpufreq registration/unregistration APIs
+1.1.1 struct thermal_cooling_device *cpufreq_cooling_register(
+ struct cpumask *clip_cpus)
+
+ This interface function registers the cpufreq cooling device with the name
+ "thermal-cpufreq-%x". This api can support multiple instances of cpufreq
+ cooling devices.
+
+ clip_cpus: cpumask of cpus where the frequency constraints will happen.
+
+1.1.2 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
+
+ This interface function unregisters the "thermal-cpufreq-%x" cooling device.
+
+ cdev: Cooling device pointer which has to be unregistered.
--- /dev/null
+Kernel driver exynos4_tmu
+=================
+
+Supported chips:
+* ARM SAMSUNG EXYNOS4 series of SoC
+ Prefix: 'exynos4-tmu'
+ Datasheet: Not publicly available
+
+Authors: Donggeun Kim <dg77.kim@samsung.com>
+
+Description
+-----------
+
+This driver allows to read temperature inside SAMSUNG EXYNOS4 series of SoC.
+
+The chip only exposes the measured 8-bit temperature code value
+through a register.
+Temperature can be taken from the temperature code.
+There are three equations converting from temperature to temperature code.
+
+The three equations are:
+ 1. Two point trimming
+ Tc = (T - 25) * (TI2 - TI1) / (85 - 25) + TI1
+
+ 2. One point trimming
+ Tc = T + TI1 - 25
+
+ 3. No trimming
+ Tc = T + 50
+
+ Tc: Temperature code, T: Temperature,
+ TI1: Trimming info for 25 degree Celsius (stored at TRIMINFO register)
+ Temperature code measured at 25 degree Celsius which is unchanged
+ TI2: Trimming info for 85 degree Celsius (stored at TRIMINFO register)
+ Temperature code measured at 85 degree Celsius which is unchanged
+
+TMU(Thermal Management Unit) in EXYNOS4 generates interrupt
+when temperature exceeds pre-defined levels.
+The maximum number of configurable threshold is four.
+The threshold levels are defined as follows:
+ Level_0: current temperature > trigger_level_0 + threshold
+ Level_1: current temperature > trigger_level_1 + threshold
+ Level_2: current temperature > trigger_level_2 + threshold
+ Level_3: current temperature > trigger_level_3 + threshold
+
+ The threshold and each trigger_level are set
+ through the corresponding registers.
+
+When an interrupt occurs, this driver notify kernel thermal framework
+with the function exynos4_report_trigger.
+Although an interrupt condition for level_0 can be set,
+it can be used to synchronize the cooling action.
1.3 interface for binding a thermal zone device with a thermal cooling device
1.3.1 int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
- int trip, struct thermal_cooling_device *cdev);
+ int trip, struct thermal_cooling_device *cdev,
+ unsigned long upper, unsigned long lower);
This interface function bind a thermal cooling device to the certain trip
point of a thermal zone device.
cdev: thermal cooling device
trip: indicates which trip point the cooling devices is associated with
in this thermal zone.
+ upper:the Maximum cooling state for this trip point.
+ THERMAL_NO_LIMIT means no upper limit,
+ and the cooling device can be in max_state.
+ lower:the Minimum cooling state can be used for this trip point.
+ THERMAL_NO_LIMIT means no lower limit,
+ and the cooling device can be in cooling state 0.
1.3.2 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz,
int trip, struct thermal_cooling_device *cdev);
#define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */
#define ACPI_EC_MSI_UDELAY 550 /* Wait 550us for MSI EC */
-#define ACPI_EC_STORM_THRESHOLD 8 /* number of false interrupts
- per one transaction */
-
enum {
EC_FLAGS_QUERY_PENDING, /* Query is pending */
EC_FLAGS_GPE_STORM, /* GPE storm detected */
module_param(ec_delay, uint, 0644);
MODULE_PARM_DESC(ec_delay, "Timeout(ms) waited until an EC command completes");
+/*
+ * If the number of false interrupts per one transaction exceeds
+ * this threshold, will think there is a GPE storm happened and
+ * will disable the GPE for normal transaction.
+ */
+static unsigned int ec_storm_threshold __read_mostly = 8;
+module_param(ec_storm_threshold, uint, 0644);
+MODULE_PARM_DESC(ec_storm_threshold, "Maxim false GPE numbers not considered as GPE storm");
+
/* If we find an EC via the ECDT, we need to keep a ptr to its context */
/* External interfaces use first EC only, so remember */
typedef int (*acpi_ec_query_func) (void *data);
msleep(1);
/* It is safe to enable the GPE outside of the transaction. */
acpi_enable_gpe(NULL, ec->gpe);
- } else if (t->irq_count > ACPI_EC_STORM_THRESHOLD) {
+ } else if (t->irq_count > ec_storm_threshold) {
pr_info(PREFIX "GPE storm detected, "
"transactions will use polling mode\n");
set_bit(EC_FLAGS_GPE_STORM, &ec->flags);
return 0;
}
+/*
+ * Clevo M720 notebook actually works ok with IRQ mode, if we lifted
+ * the GPE storm threshold back to 20
+ */
+static int ec_enlarge_storm_threshold(const struct dmi_system_id *id)
+{
+ pr_debug("Setting the EC GPE storm threshold to 20\n");
+ ec_storm_threshold = 20;
+ return 0;
+}
+
static struct dmi_system_id __initdata ec_dmi_table[] = {
{
ec_skip_dsdt_scan, "Compal JFL92", {
{
ec_validate_ecdt, "ASUS hardware", {
DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer Inc.") }, NULL},
+ {
+ ec_enlarge_storm_threshold, "CLEVO hardware", {
+ DMI_MATCH(DMI_SYS_VENDOR, "CLEVO Co."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "M720T/M730T"),}, NULL},
{},
};
-
int __init acpi_ec_ecdt_probe(void)
{
acpi_status status;
int acpi_processor_hotplug(struct acpi_processor *pr)
{
int ret = 0;
- struct cpuidle_device *dev = per_cpu(acpi_cpuidle_device, pr->id);
+ struct cpuidle_device *dev;
if (disabled_by_idle_boot_param())
return 0;
if (!pr->flags.power_setup_done)
return -ENODEV;
+ dev = per_cpu(acpi_cpuidle_device, pr->id);
cpuidle_pause_and_lock();
cpuidle_disable_device(dev);
acpi_processor_get_power_info(pr);
return -EINVAL;
}
+static int thermal_get_trend(struct thermal_zone_device *thermal,
+ int trip, enum thermal_trend *trend)
+{
+ struct acpi_thermal *tz = thermal->devdata;
+ enum thermal_trip_type type;
+ int i;
+
+ if (thermal_get_trip_type(thermal, trip, &type))
+ return -EINVAL;
+
+ if (type == THERMAL_TRIP_ACTIVE) {
+ /* aggressive active cooling */
+ *trend = THERMAL_TREND_RAISING;
+ return 0;
+ }
+
+ /*
+ * tz->temperature has already been updated by generic thermal layer,
+ * before this callback being invoked
+ */
+ i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature))
+ + (tz->trips.passive.tc2
+ * (tz->temperature - tz->trips.passive.temperature));
+
+ if (i > 0)
+ *trend = THERMAL_TREND_RAISING;
+ else if (i < 0)
+ *trend = THERMAL_TREND_DROPPING;
+ else
+ *trend = THERMAL_TREND_STABLE;
+ return 0;
+}
+
+
static int thermal_notify(struct thermal_zone_device *thermal, int trip,
enum thermal_trip_type trip_type)
{
return 0;
}
-typedef int (*cb)(struct thermal_zone_device *, int,
- struct thermal_cooling_device *);
static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
struct thermal_cooling_device *cdev,
- cb action)
+ bool bind)
{
struct acpi_device *device = cdev->devdata;
struct acpi_thermal *tz = thermal->devdata;
i++) {
handle = tz->trips.passive.devices.handles[i];
status = acpi_bus_get_device(handle, &dev);
- if (ACPI_SUCCESS(status) && (dev == device)) {
- result = action(thermal, trip, cdev);
- if (result)
- goto failed;
- }
+ if (ACPI_FAILURE(status) || dev != device)
+ continue;
+ if (bind)
+ result =
+ thermal_zone_bind_cooling_device
+ (thermal, trip, cdev,
+ THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
+ else
+ result =
+ thermal_zone_unbind_cooling_device
+ (thermal, trip, cdev);
+ if (result)
+ goto failed;
}
}
j++) {
handle = tz->trips.active[i].devices.handles[j];
status = acpi_bus_get_device(handle, &dev);
- if (ACPI_SUCCESS(status) && (dev == device)) {
- result = action(thermal, trip, cdev);
- if (result)
- goto failed;
- }
+ if (ACPI_FAILURE(status) || dev != device)
+ continue;
+ if (bind)
+ result = thermal_zone_bind_cooling_device
+ (thermal, trip, cdev,
+ THERMAL_NO_LIMIT, THERMAL_NO_LIMIT);
+ else
+ result = thermal_zone_unbind_cooling_device
+ (thermal, trip, cdev);
+ if (result)
+ goto failed;
}
}
handle = tz->devices.handles[i];
status = acpi_bus_get_device(handle, &dev);
if (ACPI_SUCCESS(status) && (dev == device)) {
- result = action(thermal, -1, cdev);
+ if (bind)
+ result = thermal_zone_bind_cooling_device
+ (thermal, -1, cdev,
+ THERMAL_NO_LIMIT,
+ THERMAL_NO_LIMIT);
+ else
+ result = thermal_zone_unbind_cooling_device
+ (thermal, -1, cdev);
if (result)
goto failed;
}
acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal,
struct thermal_cooling_device *cdev)
{
- return acpi_thermal_cooling_device_cb(thermal, cdev,
- thermal_zone_bind_cooling_device);
+ return acpi_thermal_cooling_device_cb(thermal, cdev, true);
}
static int
acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
struct thermal_cooling_device *cdev)
{
- return acpi_thermal_cooling_device_cb(thermal, cdev,
- thermal_zone_unbind_cooling_device);
+ return acpi_thermal_cooling_device_cb(thermal, cdev, false);
}
static const struct thermal_zone_device_ops acpi_thermal_zone_ops = {
.get_trip_type = thermal_get_trip_type,
.get_trip_temp = thermal_get_trip_temp,
.get_crit_temp = thermal_get_crit_temp,
+ .get_trend = thermal_get_trend,
.notify = thermal_notify,
};
tz->thermal_zone =
thermal_zone_device_register("acpitz", trips, 0, tz,
&acpi_thermal_zone_ops,
- tz->trips.passive.tc1,
- tz->trips.passive.tc2,
tz->trips.passive.tsp*100,
tz->polling_frequency*100);
else
tz->thermal_zone =
thermal_zone_device_register("acpitz", trips, 0, tz,
- &acpi_thermal_zone_ops,
- 0, 0, 0,
+ &acpi_thermal_zone_ops, 0,
tz->polling_frequency*100);
if (IS_ERR(tz->thermal_zone))
return -ENODEV;
*/
void cpuidle_disable_device(struct cpuidle_device *dev)
{
- if (!dev->enabled)
+ if (!dev || !dev->enabled)
return;
if (!cpuidle_get_driver() || !cpuidle_curr_governor)
return;
This driver can also be built as module. If so, the module
will be called da9052-hwmon.
-config SENSORS_EXYNOS4_TMU
- tristate "Temperature sensor on Samsung EXYNOS4"
- depends on ARCH_EXYNOS4
- help
- If you say yes here you get support for TMU (Thermal Management
- Unit) on SAMSUNG EXYNOS4 series of SoC.
-
- This driver can also be built as a module. If so, the module
- will be called exynos4-tmu.
-
config SENSORS_I5K_AMB
tristate "FB-DIMM AMB temperature sensor on Intel 5000 series chipsets"
depends on PCI
obj-$(CONFIG_SENSORS_EMC1403) += emc1403.o
obj-$(CONFIG_SENSORS_EMC2103) += emc2103.o
obj-$(CONFIG_SENSORS_EMC6W201) += emc6w201.o
-obj-$(CONFIG_SENSORS_EXYNOS4_TMU) += exynos4_tmu.o
obj-$(CONFIG_SENSORS_F71805F) += f71805f.o
obj-$(CONFIG_SENSORS_F71882FG) += f71882fg.o
obj-$(CONFIG_SENSORS_F75375S) += f75375s.o
+++ /dev/null
-/*
- * exynos4_tmu.c - Samsung EXYNOS4 TMU (Thermal Management Unit)
- *
- * Copyright (C) 2011 Samsung Electronics
- * Donggeun Kim <dg77.kim@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-
-#include <linux/module.h>
-#include <linux/err.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/platform_device.h>
-#include <linux/interrupt.h>
-#include <linux/clk.h>
-#include <linux/workqueue.h>
-#include <linux/sysfs.h>
-#include <linux/kobject.h>
-#include <linux/io.h>
-#include <linux/mutex.h>
-
-#include <linux/hwmon.h>
-#include <linux/hwmon-sysfs.h>
-
-#include <linux/platform_data/exynos4_tmu.h>
-
-#define EXYNOS4_TMU_REG_TRIMINFO 0x0
-#define EXYNOS4_TMU_REG_CONTROL 0x20
-#define EXYNOS4_TMU_REG_STATUS 0x28
-#define EXYNOS4_TMU_REG_CURRENT_TEMP 0x40
-#define EXYNOS4_TMU_REG_THRESHOLD_TEMP 0x44
-#define EXYNOS4_TMU_REG_TRIG_LEVEL0 0x50
-#define EXYNOS4_TMU_REG_TRIG_LEVEL1 0x54
-#define EXYNOS4_TMU_REG_TRIG_LEVEL2 0x58
-#define EXYNOS4_TMU_REG_TRIG_LEVEL3 0x5C
-#define EXYNOS4_TMU_REG_PAST_TEMP0 0x60
-#define EXYNOS4_TMU_REG_PAST_TEMP1 0x64
-#define EXYNOS4_TMU_REG_PAST_TEMP2 0x68
-#define EXYNOS4_TMU_REG_PAST_TEMP3 0x6C
-#define EXYNOS4_TMU_REG_INTEN 0x70
-#define EXYNOS4_TMU_REG_INTSTAT 0x74
-#define EXYNOS4_TMU_REG_INTCLEAR 0x78
-
-#define EXYNOS4_TMU_GAIN_SHIFT 8
-#define EXYNOS4_TMU_REF_VOLTAGE_SHIFT 24
-
-#define EXYNOS4_TMU_TRIM_TEMP_MASK 0xff
-#define EXYNOS4_TMU_CORE_ON 3
-#define EXYNOS4_TMU_CORE_OFF 2
-#define EXYNOS4_TMU_DEF_CODE_TO_TEMP_OFFSET 50
-#define EXYNOS4_TMU_TRIG_LEVEL0_MASK 0x1
-#define EXYNOS4_TMU_TRIG_LEVEL1_MASK 0x10
-#define EXYNOS4_TMU_TRIG_LEVEL2_MASK 0x100
-#define EXYNOS4_TMU_TRIG_LEVEL3_MASK 0x1000
-#define EXYNOS4_TMU_INTCLEAR_VAL 0x1111
-
-struct exynos4_tmu_data {
- struct exynos4_tmu_platform_data *pdata;
- struct device *hwmon_dev;
- struct resource *mem;
- void __iomem *base;
- int irq;
- struct work_struct irq_work;
- struct mutex lock;
- struct clk *clk;
- u8 temp_error1, temp_error2;
-};
-
-/*
- * TMU treats temperature as a mapped temperature code.
- * The temperature is converted differently depending on the calibration type.
- */
-static int temp_to_code(struct exynos4_tmu_data *data, u8 temp)
-{
- struct exynos4_tmu_platform_data *pdata = data->pdata;
- int temp_code;
-
- /* temp should range between 25 and 125 */
- if (temp < 25 || temp > 125) {
- temp_code = -EINVAL;
- goto out;
- }
-
- switch (pdata->cal_type) {
- case TYPE_TWO_POINT_TRIMMING:
- temp_code = (temp - 25) *
- (data->temp_error2 - data->temp_error1) /
- (85 - 25) + data->temp_error1;
- break;
- case TYPE_ONE_POINT_TRIMMING:
- temp_code = temp + data->temp_error1 - 25;
- break;
- default:
- temp_code = temp + EXYNOS4_TMU_DEF_CODE_TO_TEMP_OFFSET;
- break;
- }
-out:
- return temp_code;
-}
-
-/*
- * Calculate a temperature value from a temperature code.
- * The unit of the temperature is degree Celsius.
- */
-static int code_to_temp(struct exynos4_tmu_data *data, u8 temp_code)
-{
- struct exynos4_tmu_platform_data *pdata = data->pdata;
- int temp;
-
- /* temp_code should range between 75 and 175 */
- if (temp_code < 75 || temp_code > 175) {
- temp = -ENODATA;
- goto out;
- }
-
- switch (pdata->cal_type) {
- case TYPE_TWO_POINT_TRIMMING:
- temp = (temp_code - data->temp_error1) * (85 - 25) /
- (data->temp_error2 - data->temp_error1) + 25;
- break;
- case TYPE_ONE_POINT_TRIMMING:
- temp = temp_code - data->temp_error1 + 25;
- break;
- default:
- temp = temp_code - EXYNOS4_TMU_DEF_CODE_TO_TEMP_OFFSET;
- break;
- }
-out:
- return temp;
-}
-
-static int exynos4_tmu_initialize(struct platform_device *pdev)
-{
- struct exynos4_tmu_data *data = platform_get_drvdata(pdev);
- struct exynos4_tmu_platform_data *pdata = data->pdata;
- unsigned int status, trim_info;
- int ret = 0, threshold_code;
-
- mutex_lock(&data->lock);
- clk_enable(data->clk);
-
- status = readb(data->base + EXYNOS4_TMU_REG_STATUS);
- if (!status) {
- ret = -EBUSY;
- goto out;
- }
-
- /* Save trimming info in order to perform calibration */
- trim_info = readl(data->base + EXYNOS4_TMU_REG_TRIMINFO);
- data->temp_error1 = trim_info & EXYNOS4_TMU_TRIM_TEMP_MASK;
- data->temp_error2 = ((trim_info >> 8) & EXYNOS4_TMU_TRIM_TEMP_MASK);
-
- /* Write temperature code for threshold */
- threshold_code = temp_to_code(data, pdata->threshold);
- if (threshold_code < 0) {
- ret = threshold_code;
- goto out;
- }
- writeb(threshold_code,
- data->base + EXYNOS4_TMU_REG_THRESHOLD_TEMP);
-
- writeb(pdata->trigger_levels[0],
- data->base + EXYNOS4_TMU_REG_TRIG_LEVEL0);
- writeb(pdata->trigger_levels[1],
- data->base + EXYNOS4_TMU_REG_TRIG_LEVEL1);
- writeb(pdata->trigger_levels[2],
- data->base + EXYNOS4_TMU_REG_TRIG_LEVEL2);
- writeb(pdata->trigger_levels[3],
- data->base + EXYNOS4_TMU_REG_TRIG_LEVEL3);
-
- writel(EXYNOS4_TMU_INTCLEAR_VAL,
- data->base + EXYNOS4_TMU_REG_INTCLEAR);
-out:
- clk_disable(data->clk);
- mutex_unlock(&data->lock);
-
- return ret;
-}
-
-static void exynos4_tmu_control(struct platform_device *pdev, bool on)
-{
- struct exynos4_tmu_data *data = platform_get_drvdata(pdev);
- struct exynos4_tmu_platform_data *pdata = data->pdata;
- unsigned int con, interrupt_en;
-
- mutex_lock(&data->lock);
- clk_enable(data->clk);
-
- con = pdata->reference_voltage << EXYNOS4_TMU_REF_VOLTAGE_SHIFT |
- pdata->gain << EXYNOS4_TMU_GAIN_SHIFT;
- if (on) {
- con |= EXYNOS4_TMU_CORE_ON;
- interrupt_en = pdata->trigger_level3_en << 12 |
- pdata->trigger_level2_en << 8 |
- pdata->trigger_level1_en << 4 |
- pdata->trigger_level0_en;
- } else {
- con |= EXYNOS4_TMU_CORE_OFF;
- interrupt_en = 0; /* Disable all interrupts */
- }
- writel(interrupt_en, data->base + EXYNOS4_TMU_REG_INTEN);
- writel(con, data->base + EXYNOS4_TMU_REG_CONTROL);
-
- clk_disable(data->clk);
- mutex_unlock(&data->lock);
-}
-
-static int exynos4_tmu_read(struct exynos4_tmu_data *data)
-{
- u8 temp_code;
- int temp;
-
- mutex_lock(&data->lock);
- clk_enable(data->clk);
-
- temp_code = readb(data->base + EXYNOS4_TMU_REG_CURRENT_TEMP);
- temp = code_to_temp(data, temp_code);
-
- clk_disable(data->clk);
- mutex_unlock(&data->lock);
-
- return temp;
-}
-
-static void exynos4_tmu_work(struct work_struct *work)
-{
- struct exynos4_tmu_data *data = container_of(work,
- struct exynos4_tmu_data, irq_work);
-
- mutex_lock(&data->lock);
- clk_enable(data->clk);
-
- writel(EXYNOS4_TMU_INTCLEAR_VAL, data->base + EXYNOS4_TMU_REG_INTCLEAR);
-
- kobject_uevent(&data->hwmon_dev->kobj, KOBJ_CHANGE);
-
- enable_irq(data->irq);
-
- clk_disable(data->clk);
- mutex_unlock(&data->lock);
-}
-
-static irqreturn_t exynos4_tmu_irq(int irq, void *id)
-{
- struct exynos4_tmu_data *data = id;
-
- disable_irq_nosync(irq);
- schedule_work(&data->irq_work);
-
- return IRQ_HANDLED;
-}
-
-static ssize_t exynos4_tmu_show_name(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return sprintf(buf, "exynos4-tmu\n");
-}
-
-static ssize_t exynos4_tmu_show_temp(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct exynos4_tmu_data *data = dev_get_drvdata(dev);
- int ret;
-
- ret = exynos4_tmu_read(data);
- if (ret < 0)
- return ret;
-
- /* convert from degree Celsius to millidegree Celsius */
- return sprintf(buf, "%d\n", ret * 1000);
-}
-
-static ssize_t exynos4_tmu_show_alarm(struct device *dev,
- struct device_attribute *devattr, char *buf)
-{
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
- struct exynos4_tmu_data *data = dev_get_drvdata(dev);
- struct exynos4_tmu_platform_data *pdata = data->pdata;
- int temp;
- unsigned int trigger_level;
-
- temp = exynos4_tmu_read(data);
- if (temp < 0)
- return temp;
-
- trigger_level = pdata->threshold + pdata->trigger_levels[attr->index];
-
- return sprintf(buf, "%d\n", !!(temp > trigger_level));
-}
-
-static ssize_t exynos4_tmu_show_level(struct device *dev,
- struct device_attribute *devattr, char *buf)
-{
- struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
- struct exynos4_tmu_data *data = dev_get_drvdata(dev);
- struct exynos4_tmu_platform_data *pdata = data->pdata;
- unsigned int temp = pdata->threshold +
- pdata->trigger_levels[attr->index];
-
- return sprintf(buf, "%u\n", temp * 1000);
-}
-
-static DEVICE_ATTR(name, S_IRUGO, exynos4_tmu_show_name, NULL);
-static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, exynos4_tmu_show_temp, NULL, 0);
-
-static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO,
- exynos4_tmu_show_alarm, NULL, 1);
-static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO,
- exynos4_tmu_show_alarm, NULL, 2);
-static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO,
- exynos4_tmu_show_alarm, NULL, 3);
-
-static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, exynos4_tmu_show_level, NULL, 1);
-static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, exynos4_tmu_show_level, NULL, 2);
-static SENSOR_DEVICE_ATTR(temp1_emergency, S_IRUGO,
- exynos4_tmu_show_level, NULL, 3);
-
-static struct attribute *exynos4_tmu_attributes[] = {
- &dev_attr_name.attr,
- &sensor_dev_attr_temp1_input.dev_attr.attr,
- &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
- &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
- &sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr,
- &sensor_dev_attr_temp1_max.dev_attr.attr,
- &sensor_dev_attr_temp1_crit.dev_attr.attr,
- &sensor_dev_attr_temp1_emergency.dev_attr.attr,
- NULL,
-};
-
-static const struct attribute_group exynos4_tmu_attr_group = {
- .attrs = exynos4_tmu_attributes,
-};
-
-static int __devinit exynos4_tmu_probe(struct platform_device *pdev)
-{
- struct exynos4_tmu_data *data;
- struct exynos4_tmu_platform_data *pdata = pdev->dev.platform_data;
- int ret;
-
- if (!pdata) {
- dev_err(&pdev->dev, "No platform init data supplied.\n");
- return -ENODEV;
- }
-
- data = kzalloc(sizeof(struct exynos4_tmu_data), GFP_KERNEL);
- if (!data) {
- dev_err(&pdev->dev, "Failed to allocate driver structure\n");
- return -ENOMEM;
- }
-
- data->irq = platform_get_irq(pdev, 0);
- if (data->irq < 0) {
- ret = data->irq;
- dev_err(&pdev->dev, "Failed to get platform irq\n");
- goto err_free;
- }
-
- INIT_WORK(&data->irq_work, exynos4_tmu_work);
-
- data->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!data->mem) {
- ret = -ENOENT;
- dev_err(&pdev->dev, "Failed to get platform resource\n");
- goto err_free;
- }
-
- data->mem = request_mem_region(data->mem->start,
- resource_size(data->mem), pdev->name);
- if (!data->mem) {
- ret = -ENODEV;
- dev_err(&pdev->dev, "Failed to request memory region\n");
- goto err_free;
- }
-
- data->base = ioremap(data->mem->start, resource_size(data->mem));
- if (!data->base) {
- ret = -ENODEV;
- dev_err(&pdev->dev, "Failed to ioremap memory\n");
- goto err_mem_region;
- }
-
- ret = request_irq(data->irq, exynos4_tmu_irq,
- IRQF_TRIGGER_RISING,
- "exynos4-tmu", data);
- if (ret) {
- dev_err(&pdev->dev, "Failed to request irq: %d\n", data->irq);
- goto err_io_remap;
- }
-
- data->clk = clk_get(NULL, "tmu_apbif");
- if (IS_ERR(data->clk)) {
- ret = PTR_ERR(data->clk);
- dev_err(&pdev->dev, "Failed to get clock\n");
- goto err_irq;
- }
-
- data->pdata = pdata;
- platform_set_drvdata(pdev, data);
- mutex_init(&data->lock);
-
- ret = exynos4_tmu_initialize(pdev);
- if (ret) {
- dev_err(&pdev->dev, "Failed to initialize TMU\n");
- goto err_clk;
- }
-
- ret = sysfs_create_group(&pdev->dev.kobj, &exynos4_tmu_attr_group);
- if (ret) {
- dev_err(&pdev->dev, "Failed to create sysfs group\n");
- goto err_clk;
- }
-
- data->hwmon_dev = hwmon_device_register(&pdev->dev);
- if (IS_ERR(data->hwmon_dev)) {
- ret = PTR_ERR(data->hwmon_dev);
- dev_err(&pdev->dev, "Failed to register hwmon device\n");
- goto err_create_group;
- }
-
- exynos4_tmu_control(pdev, true);
-
- return 0;
-
-err_create_group:
- sysfs_remove_group(&pdev->dev.kobj, &exynos4_tmu_attr_group);
-err_clk:
- platform_set_drvdata(pdev, NULL);
- clk_put(data->clk);
-err_irq:
- free_irq(data->irq, data);
-err_io_remap:
- iounmap(data->base);
-err_mem_region:
- release_mem_region(data->mem->start, resource_size(data->mem));
-err_free:
- kfree(data);
-
- return ret;
-}
-
-static int __devexit exynos4_tmu_remove(struct platform_device *pdev)
-{
- struct exynos4_tmu_data *data = platform_get_drvdata(pdev);
-
- exynos4_tmu_control(pdev, false);
-
- hwmon_device_unregister(data->hwmon_dev);
- sysfs_remove_group(&pdev->dev.kobj, &exynos4_tmu_attr_group);
-
- clk_put(data->clk);
-
- free_irq(data->irq, data);
-
- iounmap(data->base);
- release_mem_region(data->mem->start, resource_size(data->mem));
-
- platform_set_drvdata(pdev, NULL);
-
- kfree(data);
-
- return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int exynos4_tmu_suspend(struct device *dev)
-{
- exynos4_tmu_control(to_platform_device(dev), false);
-
- return 0;
-}
-
-static int exynos4_tmu_resume(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
-
- exynos4_tmu_initialize(pdev);
- exynos4_tmu_control(pdev, true);
-
- return 0;
-}
-
-static SIMPLE_DEV_PM_OPS(exynos4_tmu_pm,
- exynos4_tmu_suspend, exynos4_tmu_resume);
-#define EXYNOS4_TMU_PM &exynos4_tmu_pm
-#else
-#define EXYNOS4_TMU_PM NULL
-#endif
-
-static struct platform_driver exynos4_tmu_driver = {
- .driver = {
- .name = "exynos4-tmu",
- .owner = THIS_MODULE,
- .pm = EXYNOS4_TMU_PM,
- },
- .probe = exynos4_tmu_probe,
- .remove = __devexit_p(exynos4_tmu_remove),
-};
-
-module_platform_driver(exynos4_tmu_driver);
-
-MODULE_DESCRIPTION("EXYNOS4 TMU Driver");
-MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:exynos4-tmu");
if (cdev != cl_dev)
return 0;
- if (thermal_zone_bind_cooling_device(thermal, 0, cdev)) {
+ if (thermal_zone_bind_cooling_device(thermal, 0, cdev,
+ THERMAL_NO_LIMIT, THERMAL_NO_LIMIT)) {
pr_err("error binding cooling dev\n");
return -EINVAL;
}
return -EINVAL;
thz_dev = thermal_zone_device_register("acerhdf", 1, 0, NULL,
- &acerhdf_dev_ops, 0, 0, 0,
+ &acerhdf_dev_ops, 0,
(kernelmode) ? interval*1000 : 0);
if (IS_ERR(thz_dev))
return -EINVAL;
goto err;
}
pinfo->tzd[i] = thermal_zone_device_register(name[i],
- 0, 0, td_info, &tzd_ops, 0, 0, 0, 0);
+ 0, 0, td_info, &tzd_ops, 0, 0);
if (IS_ERR(pinfo->tzd[i])) {
kfree(td_info);
ret = PTR_ERR(pinfo->tzd[i]);
for (i = 0; i < psy->num_properties; i++) {
if (psy->properties[i] == POWER_SUPPLY_PROP_TEMP) {
psy->tzd = thermal_zone_device_register(psy->name, 0, 0,
- psy, &psy_tzd_ops, 0, 0, 0, 0);
+ psy, &psy_tzd_ops, 0, 0);
if (IS_ERR(psy->tzd))
return PTR_ERR(psy->tzd);
break;
/* TODO: bind with min and max states */
/* Simple thing, two trips, one passive another critical */
- return thermal_zone_bind_cooling_device(thermal, 0, cdev);
+ return thermal_zone_bind_cooling_device(thermal, 0, cdev,
+ THERMAL_NO_LIMIT,
+ THERMAL_NO_LIMIT);
}
/* Unbind callback functions for thermal zone */
/* Create thermal zone */
data->omap_thermal = thermal_zone_device_register(domain,
OMAP_TRIP_NUMBER, 0, data, &omap_thermal_ops,
- 1, 2, /*TODO: remove this when FW allows */
FAST_TEMP_MONITORING_RATE,
FAST_TEMP_MONITORING_RATE);
if (IS_ERR_OR_NULL(data->omap_thermal)) {
depends on HWMON=y || HWMON=THERMAL
default y
+config CPU_THERMAL
+ bool "generic cpu cooling support"
+ depends on THERMAL && CPU_FREQ
+ help
+ This implements the generic cpu cooling mechanism through frequency
+ reduction, cpu hotplug and any other ways of reducing temperature. An
+ ACPI version of this already exists(drivers/acpi/processor_thermal.c).
+ This will be useful for platforms using the generic thermal interface
+ and not the ACPI interface.
+ If you want this support, you should say Y here.
+
config SPEAR_THERMAL
bool "SPEAr thermal sensor driver"
depends on THERMAL
help
Enable this to plug the SPEAr thermal sensor driver into the Linux
thermal framework
+
+config RCAR_THERMAL
+ tristate "Renesas R-Car thermal driver"
+ depends on THERMAL
+ depends on ARCH_SHMOBILE
+ help
+ Enable this to plug the R-Car thermal sensor driver into the Linux
+ thermal framework
+
+config EXYNOS_THERMAL
+ tristate "Temperature sensor on Samsung EXYNOS"
+ depends on (ARCH_EXYNOS4 || ARCH_EXYNOS5) && THERMAL
+ help
+ If you say yes here you get support for TMU (Thermal Managment
+ Unit) on SAMSUNG EXYNOS series of SoC.
#
obj-$(CONFIG_THERMAL) += thermal_sys.o
-obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o
\ No newline at end of file
+obj-$(CONFIG_CPU_THERMAL) += cpu_cooling.o
+obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o
+obj-$(CONFIG_RCAR_THERMAL) += rcar_thermal.o
+obj-$(CONFIG_EXYNOS_THERMAL) += exynos_thermal.o
--- /dev/null
+/*
+ * linux/drivers/thermal/cpu_cooling.c
+ *
+ * Copyright (C) 2012 Samsung Electronics Co., Ltd(http://www.samsung.com)
+ * Copyright (C) 2012 Amit Daniel <amit.kachhap@linaro.org>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * 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; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/thermal.h>
+#include <linux/platform_device.h>
+#include <linux/cpufreq.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/cpu.h>
+#include <linux/cpu_cooling.h>
+
+/**
+ * struct cpufreq_cooling_device
+ * @id: unique integer value corresponding to each cpufreq_cooling_device
+ * registered.
+ * @cool_dev: thermal_cooling_device pointer to keep track of the the
+ * egistered cooling device.
+ * @cpufreq_state: integer value representing the current state of cpufreq
+ * cooling devices.
+ * @cpufreq_val: integer value representing the absolute value of the clipped
+ * frequency.
+ * @allowed_cpus: all the cpus involved for this cpufreq_cooling_device.
+ * @node: list_head to link all cpufreq_cooling_device together.
+ *
+ * This structure is required for keeping information of each
+ * cpufreq_cooling_device registered as a list whose head is represented by
+ * cooling_cpufreq_list. In order to prevent corruption of this list a
+ * mutex lock cooling_cpufreq_lock is used.
+ */
+struct cpufreq_cooling_device {
+ int id;
+ struct thermal_cooling_device *cool_dev;
+ unsigned int cpufreq_state;
+ unsigned int cpufreq_val;
+ struct cpumask allowed_cpus;
+ struct list_head node;
+};
+static LIST_HEAD(cooling_cpufreq_list);
+static DEFINE_IDR(cpufreq_idr);
+
+static struct mutex cooling_cpufreq_lock;
+
+/* notify_table passes value to the CPUFREQ_ADJUST callback function. */
+#define NOTIFY_INVALID NULL
+struct cpufreq_cooling_device *notify_device;
+
+/**
+ * get_idr - function to get a unique id.
+ * @idr: struct idr * handle used to create a id.
+ * @id: int * value generated by this function.
+ */
+static int get_idr(struct idr *idr, int *id)
+{
+ int err;
+again:
+ if (unlikely(idr_pre_get(idr, GFP_KERNEL) == 0))
+ return -ENOMEM;
+
+ mutex_lock(&cooling_cpufreq_lock);
+ err = idr_get_new(idr, NULL, id);
+ mutex_unlock(&cooling_cpufreq_lock);
+
+ if (unlikely(err == -EAGAIN))
+ goto again;
+ else if (unlikely(err))
+ return err;
+
+ *id = *id & MAX_IDR_MASK;
+ return 0;
+}
+
+/**
+ * release_idr - function to free the unique id.
+ * @idr: struct idr * handle used for creating the id.
+ * @id: int value representing the unique id.
+ */
+static void release_idr(struct idr *idr, int id)
+{
+ mutex_lock(&cooling_cpufreq_lock);
+ idr_remove(idr, id);
+ mutex_unlock(&cooling_cpufreq_lock);
+}
+
+/* Below code defines functions to be used for cpufreq as cooling device */
+
+/**
+ * is_cpufreq_valid - function to check if a cpu has frequency transition policy.
+ * @cpu: cpu for which check is needed.
+ */
+static int is_cpufreq_valid(int cpu)
+{
+ struct cpufreq_policy policy;
+ return !cpufreq_get_policy(&policy, cpu);
+}
+
+/**
+ * get_cpu_frequency - get the absolute value of frequency from level.
+ * @cpu: cpu for which frequency is fetched.
+ * @level: level of frequency of the CPU
+ * e.g level=1 --> 1st MAX FREQ, LEVEL=2 ---> 2nd MAX FREQ, .... etc
+ */
+static unsigned int get_cpu_frequency(unsigned int cpu, unsigned long level)
+{
+ int ret = 0, i = 0;
+ unsigned long level_index;
+ bool descend = false;
+ struct cpufreq_frequency_table *table =
+ cpufreq_frequency_get_table(cpu);
+ if (!table)
+ return ret;
+
+ while (table[i].frequency != CPUFREQ_TABLE_END) {
+ if (table[i].frequency == CPUFREQ_ENTRY_INVALID)
+ continue;
+
+ /*check if table in ascending or descending order*/
+ if ((table[i + 1].frequency != CPUFREQ_TABLE_END) &&
+ (table[i + 1].frequency < table[i].frequency)
+ && !descend) {
+ descend = true;
+ }
+
+ /*return if level matched and table in descending order*/
+ if (descend && i == level)
+ return table[i].frequency;
+ i++;
+ }
+ i--;
+
+ if (level > i || descend)
+ return ret;
+ level_index = i - level;
+
+ /*Scan the table in reverse order and match the level*/
+ while (i >= 0) {
+ if (table[i].frequency == CPUFREQ_ENTRY_INVALID)
+ continue;
+ /*return if level matched*/
+ if (i == level_index)
+ return table[i].frequency;
+ i--;
+ }
+ return ret;
+}
+
+/**
+ * cpufreq_apply_cooling - function to apply frequency clipping.
+ * @cpufreq_device: cpufreq_cooling_device pointer containing frequency
+ * clipping data.
+ * @cooling_state: value of the cooling state.
+ */
+static int cpufreq_apply_cooling(struct cpufreq_cooling_device *cpufreq_device,
+ unsigned long cooling_state)
+{
+ unsigned int cpuid, clip_freq;
+ struct cpumask *maskPtr = &cpufreq_device->allowed_cpus;
+ unsigned int cpu = cpumask_any(maskPtr);
+
+
+ /* Check if the old cooling action is same as new cooling action */
+ if (cpufreq_device->cpufreq_state == cooling_state)
+ return 0;
+
+ clip_freq = get_cpu_frequency(cpu, cooling_state);
+ if (!clip_freq)
+ return -EINVAL;
+
+ cpufreq_device->cpufreq_state = cooling_state;
+ cpufreq_device->cpufreq_val = clip_freq;
+ notify_device = cpufreq_device;
+
+ for_each_cpu(cpuid, maskPtr) {
+ if (is_cpufreq_valid(cpuid))
+ cpufreq_update_policy(cpuid);
+ }
+
+ notify_device = NOTIFY_INVALID;
+
+ return 0;
+}
+
+/**
+ * cpufreq_thermal_notifier - notifier callback for cpufreq policy change.
+ * @nb: struct notifier_block * with callback info.
+ * @event: value showing cpufreq event for which this function invoked.
+ * @data: callback-specific data
+ */
+static int cpufreq_thermal_notifier(struct notifier_block *nb,
+ unsigned long event, void *data)
+{
+ struct cpufreq_policy *policy = data;
+ unsigned long max_freq = 0;
+
+ if (event != CPUFREQ_ADJUST || notify_device == NOTIFY_INVALID)
+ return 0;
+
+ if (cpumask_test_cpu(policy->cpu, ¬ify_device->allowed_cpus))
+ max_freq = notify_device->cpufreq_val;
+
+ /* Never exceed user_policy.max*/
+ if (max_freq > policy->user_policy.max)
+ max_freq = policy->user_policy.max;
+
+ if (policy->max != max_freq)
+ cpufreq_verify_within_limits(policy, 0, max_freq);
+
+ return 0;
+}
+
+/*
+ * cpufreq cooling device callback functions are defined below
+ */
+
+/**
+ * cpufreq_get_max_state - callback function to get the max cooling state.
+ * @cdev: thermal cooling device pointer.
+ * @state: fill this variable with the max cooling state.
+ */
+static int cpufreq_get_max_state(struct thermal_cooling_device *cdev,
+ unsigned long *state)
+{
+ int ret = -EINVAL, i = 0;
+ struct cpufreq_cooling_device *cpufreq_device;
+ struct cpumask *maskPtr;
+ unsigned int cpu;
+ struct cpufreq_frequency_table *table;
+
+ mutex_lock(&cooling_cpufreq_lock);
+ list_for_each_entry(cpufreq_device, &cooling_cpufreq_list, node) {
+ if (cpufreq_device && cpufreq_device->cool_dev == cdev)
+ break;
+ }
+ if (cpufreq_device == NULL)
+ goto return_get_max_state;
+
+ maskPtr = &cpufreq_device->allowed_cpus;
+ cpu = cpumask_any(maskPtr);
+ table = cpufreq_frequency_get_table(cpu);
+ if (!table) {
+ *state = 0;
+ ret = 0;
+ goto return_get_max_state;
+ }
+
+ while (table[i].frequency != CPUFREQ_TABLE_END) {
+ if (table[i].frequency == CPUFREQ_ENTRY_INVALID)
+ continue;
+ i++;
+ }
+ if (i > 0) {
+ *state = --i;
+ ret = 0;
+ }
+
+return_get_max_state:
+ mutex_unlock(&cooling_cpufreq_lock);
+ return ret;
+}
+
+/**
+ * cpufreq_get_cur_state - callback function to get the current cooling state.
+ * @cdev: thermal cooling device pointer.
+ * @state: fill this variable with the current cooling state.
+ */
+static int cpufreq_get_cur_state(struct thermal_cooling_device *cdev,
+ unsigned long *state)
+{
+ int ret = -EINVAL;
+ struct cpufreq_cooling_device *cpufreq_device;
+
+ mutex_lock(&cooling_cpufreq_lock);
+ list_for_each_entry(cpufreq_device, &cooling_cpufreq_list, node) {
+ if (cpufreq_device && cpufreq_device->cool_dev == cdev) {
+ *state = cpufreq_device->cpufreq_state;
+ ret = 0;
+ break;
+ }
+ }
+ mutex_unlock(&cooling_cpufreq_lock);
+
+ return ret;
+}
+
+/**
+ * cpufreq_set_cur_state - callback function to set the current cooling state.
+ * @cdev: thermal cooling device pointer.
+ * @state: set this variable to the current cooling state.
+ */
+static int cpufreq_set_cur_state(struct thermal_cooling_device *cdev,
+ unsigned long state)
+{
+ int ret = -EINVAL;
+ struct cpufreq_cooling_device *cpufreq_device;
+
+ mutex_lock(&cooling_cpufreq_lock);
+ list_for_each_entry(cpufreq_device, &cooling_cpufreq_list, node) {
+ if (cpufreq_device && cpufreq_device->cool_dev == cdev) {
+ ret = 0;
+ break;
+ }
+ }
+ if (!ret)
+ ret = cpufreq_apply_cooling(cpufreq_device, state);
+
+ mutex_unlock(&cooling_cpufreq_lock);
+
+ return ret;
+}
+
+/* Bind cpufreq callbacks to thermal cooling device ops */
+static struct thermal_cooling_device_ops const cpufreq_cooling_ops = {
+ .get_max_state = cpufreq_get_max_state,
+ .get_cur_state = cpufreq_get_cur_state,
+ .set_cur_state = cpufreq_set_cur_state,
+};
+
+/* Notifier for cpufreq policy change */
+static struct notifier_block thermal_cpufreq_notifier_block = {
+ .notifier_call = cpufreq_thermal_notifier,
+};
+
+/**
+ * cpufreq_cooling_register - function to create cpufreq cooling device.
+ * @clip_cpus: cpumask of cpus where the frequency constraints will happen.
+ */
+struct thermal_cooling_device *cpufreq_cooling_register(
+ struct cpumask *clip_cpus)
+{
+ struct thermal_cooling_device *cool_dev;
+ struct cpufreq_cooling_device *cpufreq_dev = NULL;
+ unsigned int cpufreq_dev_count = 0, min = 0, max = 0;
+ char dev_name[THERMAL_NAME_LENGTH];
+ int ret = 0, i;
+ struct cpufreq_policy policy;
+
+ list_for_each_entry(cpufreq_dev, &cooling_cpufreq_list, node)
+ cpufreq_dev_count++;
+
+ /*Verify that all the clip cpus have same freq_min, freq_max limit*/
+ for_each_cpu(i, clip_cpus) {
+ /*continue if cpufreq policy not found and not return error*/
+ if (!cpufreq_get_policy(&policy, i))
+ continue;
+ if (min == 0 && max == 0) {
+ min = policy.cpuinfo.min_freq;
+ max = policy.cpuinfo.max_freq;
+ } else {
+ if (min != policy.cpuinfo.min_freq ||
+ max != policy.cpuinfo.max_freq)
+ return ERR_PTR(-EINVAL);
+}
+ }
+ cpufreq_dev = kzalloc(sizeof(struct cpufreq_cooling_device),
+ GFP_KERNEL);
+ if (!cpufreq_dev)
+ return ERR_PTR(-ENOMEM);
+
+ cpumask_copy(&cpufreq_dev->allowed_cpus, clip_cpus);
+
+ if (cpufreq_dev_count == 0)
+ mutex_init(&cooling_cpufreq_lock);
+
+ ret = get_idr(&cpufreq_idr, &cpufreq_dev->id);
+ if (ret) {
+ kfree(cpufreq_dev);
+ return ERR_PTR(-EINVAL);
+ }
+
+ sprintf(dev_name, "thermal-cpufreq-%d", cpufreq_dev->id);
+
+ cool_dev = thermal_cooling_device_register(dev_name, cpufreq_dev,
+ &cpufreq_cooling_ops);
+ if (!cool_dev) {
+ release_idr(&cpufreq_idr, cpufreq_dev->id);
+ kfree(cpufreq_dev);
+ return ERR_PTR(-EINVAL);
+ }
+ cpufreq_dev->cool_dev = cool_dev;
+ cpufreq_dev->cpufreq_state = 0;
+ mutex_lock(&cooling_cpufreq_lock);
+ list_add_tail(&cpufreq_dev->node, &cooling_cpufreq_list);
+
+ /* Register the notifier for first cpufreq cooling device */
+ if (cpufreq_dev_count == 0)
+ cpufreq_register_notifier(&thermal_cpufreq_notifier_block,
+ CPUFREQ_POLICY_NOTIFIER);
+
+ mutex_unlock(&cooling_cpufreq_lock);
+ return cool_dev;
+}
+EXPORT_SYMBOL(cpufreq_cooling_register);
+
+/**
+ * cpufreq_cooling_unregister - function to remove cpufreq cooling device.
+ * @cdev: thermal cooling device pointer.
+ */
+void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
+{
+ struct cpufreq_cooling_device *cpufreq_dev = NULL;
+ unsigned int cpufreq_dev_count = 0;
+
+ mutex_lock(&cooling_cpufreq_lock);
+ list_for_each_entry(cpufreq_dev, &cooling_cpufreq_list, node) {
+ if (cpufreq_dev && cpufreq_dev->cool_dev == cdev)
+ break;
+ cpufreq_dev_count++;
+ }
+
+ if (!cpufreq_dev || cpufreq_dev->cool_dev != cdev) {
+ mutex_unlock(&cooling_cpufreq_lock);
+ return;
+ }
+
+ list_del(&cpufreq_dev->node);
+
+ /* Unregister the notifier for the last cpufreq cooling device */
+ if (cpufreq_dev_count == 1) {
+ cpufreq_unregister_notifier(&thermal_cpufreq_notifier_block,
+ CPUFREQ_POLICY_NOTIFIER);
+ }
+ mutex_unlock(&cooling_cpufreq_lock);
+ thermal_cooling_device_unregister(cpufreq_dev->cool_dev);
+ release_idr(&cpufreq_idr, cpufreq_dev->id);
+ if (cpufreq_dev_count == 1)
+ mutex_destroy(&cooling_cpufreq_lock);
+ kfree(cpufreq_dev);
+}
+EXPORT_SYMBOL(cpufreq_cooling_unregister);
--- /dev/null
+/*
+ * exynos_thermal.c - Samsung EXYNOS TMU (Thermal Management Unit)
+ *
+ * Copyright (C) 2011 Samsung Electronics
+ * Donggeun Kim <dg77.kim@samsung.com>
+ * Amit Daniel Kachhap <amit.kachhap@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/clk.h>
+#include <linux/workqueue.h>
+#include <linux/sysfs.h>
+#include <linux/kobject.h>
+#include <linux/io.h>
+#include <linux/mutex.h>
+#include <linux/platform_data/exynos_thermal.h>
+#include <linux/thermal.h>
+#include <linux/cpufreq.h>
+#include <linux/cpu_cooling.h>
+#include <linux/of.h>
+
+#include <plat/cpu.h>
+
+/* Exynos generic registers */
+#define EXYNOS_TMU_REG_TRIMINFO 0x0
+#define EXYNOS_TMU_REG_CONTROL 0x20
+#define EXYNOS_TMU_REG_STATUS 0x28
+#define EXYNOS_TMU_REG_CURRENT_TEMP 0x40
+#define EXYNOS_TMU_REG_INTEN 0x70
+#define EXYNOS_TMU_REG_INTSTAT 0x74
+#define EXYNOS_TMU_REG_INTCLEAR 0x78
+
+#define EXYNOS_TMU_TRIM_TEMP_MASK 0xff
+#define EXYNOS_TMU_GAIN_SHIFT 8
+#define EXYNOS_TMU_REF_VOLTAGE_SHIFT 24
+#define EXYNOS_TMU_CORE_ON 3
+#define EXYNOS_TMU_CORE_OFF 2
+#define EXYNOS_TMU_DEF_CODE_TO_TEMP_OFFSET 50
+
+/* Exynos4210 specific registers */
+#define EXYNOS4210_TMU_REG_THRESHOLD_TEMP 0x44
+#define EXYNOS4210_TMU_REG_TRIG_LEVEL0 0x50
+#define EXYNOS4210_TMU_REG_TRIG_LEVEL1 0x54
+#define EXYNOS4210_TMU_REG_TRIG_LEVEL2 0x58
+#define EXYNOS4210_TMU_REG_TRIG_LEVEL3 0x5C
+#define EXYNOS4210_TMU_REG_PAST_TEMP0 0x60
+#define EXYNOS4210_TMU_REG_PAST_TEMP1 0x64
+#define EXYNOS4210_TMU_REG_PAST_TEMP2 0x68
+#define EXYNOS4210_TMU_REG_PAST_TEMP3 0x6C
+
+#define EXYNOS4210_TMU_TRIG_LEVEL0_MASK 0x1
+#define EXYNOS4210_TMU_TRIG_LEVEL1_MASK 0x10
+#define EXYNOS4210_TMU_TRIG_LEVEL2_MASK 0x100
+#define EXYNOS4210_TMU_TRIG_LEVEL3_MASK 0x1000
+#define EXYNOS4210_TMU_INTCLEAR_VAL 0x1111
+
+/* Exynos5250 and Exynos4412 specific registers */
+#define EXYNOS_TMU_TRIMINFO_CON 0x14
+#define EXYNOS_THD_TEMP_RISE 0x50
+#define EXYNOS_THD_TEMP_FALL 0x54
+#define EXYNOS_EMUL_CON 0x80
+
+#define EXYNOS_TRIMINFO_RELOAD 0x1
+#define EXYNOS_TMU_CLEAR_RISE_INT 0x111
+#define EXYNOS_TMU_CLEAR_FALL_INT (0x111 << 16)
+#define EXYNOS_MUX_ADDR_VALUE 6
+#define EXYNOS_MUX_ADDR_SHIFT 20
+#define EXYNOS_TMU_TRIP_MODE_SHIFT 13
+
+#define EFUSE_MIN_VALUE 40
+#define EFUSE_MAX_VALUE 100
+
+/* In-kernel thermal framework related macros & definations */
+#define SENSOR_NAME_LEN 16
+#define MAX_TRIP_COUNT 8
+#define MAX_COOLING_DEVICE 4
+
+#define ACTIVE_INTERVAL 500
+#define IDLE_INTERVAL 10000
+#define MCELSIUS 1000
+
+/* CPU Zone information */
+#define PANIC_ZONE 4
+#define WARN_ZONE 3
+#define MONITOR_ZONE 2
+#define SAFE_ZONE 1
+
+#define GET_ZONE(trip) (trip + 2)
+#define GET_TRIP(zone) (zone - 2)
+
+#define EXYNOS_ZONE_COUNT 3
+
+struct exynos_tmu_data {
+ struct exynos_tmu_platform_data *pdata;
+ struct resource *mem;
+ void __iomem *base;
+ int irq;
+ enum soc_type soc;
+ struct work_struct irq_work;
+ struct mutex lock;
+ struct clk *clk;
+ u8 temp_error1, temp_error2;
+};
+
+struct thermal_trip_point_conf {
+ int trip_val[MAX_TRIP_COUNT];
+ int trip_count;
+};
+
+struct thermal_cooling_conf {
+ struct freq_clip_table freq_data[MAX_TRIP_COUNT];
+ int freq_clip_count;
+};
+
+struct thermal_sensor_conf {
+ char name[SENSOR_NAME_LEN];
+ int (*read_temperature)(void *data);
+ struct thermal_trip_point_conf trip_data;
+ struct thermal_cooling_conf cooling_data;
+ void *private_data;
+};
+
+struct exynos_thermal_zone {
+ enum thermal_device_mode mode;
+ struct thermal_zone_device *therm_dev;
+ struct thermal_cooling_device *cool_dev[MAX_COOLING_DEVICE];
+ unsigned int cool_dev_size;
+ struct platform_device *exynos4_dev;
+ struct thermal_sensor_conf *sensor_conf;
+ bool bind;
+};
+
+static struct exynos_thermal_zone *th_zone;
+static void exynos_unregister_thermal(void);
+static int exynos_register_thermal(struct thermal_sensor_conf *sensor_conf);
+
+/* Get mode callback functions for thermal zone */
+static int exynos_get_mode(struct thermal_zone_device *thermal,
+ enum thermal_device_mode *mode)
+{
+ if (th_zone)
+ *mode = th_zone->mode;
+ return 0;
+}
+
+/* Set mode callback functions for thermal zone */
+static int exynos_set_mode(struct thermal_zone_device *thermal,
+ enum thermal_device_mode mode)
+{
+ if (!th_zone->therm_dev) {
+ pr_notice("thermal zone not registered\n");
+ return 0;
+ }
+
+ mutex_lock(&th_zone->therm_dev->lock);
+
+ if (mode == THERMAL_DEVICE_ENABLED)
+ th_zone->therm_dev->polling_delay = IDLE_INTERVAL;
+ else
+ th_zone->therm_dev->polling_delay = 0;
+
+ mutex_unlock(&th_zone->therm_dev->lock);
+
+ th_zone->mode = mode;
+ thermal_zone_device_update(th_zone->therm_dev);
+ pr_info("thermal polling set for duration=%d msec\n",
+ th_zone->therm_dev->polling_delay);
+ return 0;
+}
+
+
+/* Get trip type callback functions for thermal zone */
+static int exynos_get_trip_type(struct thermal_zone_device *thermal, int trip,
+ enum thermal_trip_type *type)
+{
+ switch (GET_ZONE(trip)) {
+ case MONITOR_ZONE:
+ case WARN_ZONE:
+ *type = THERMAL_TRIP_ACTIVE;
+ break;
+ case PANIC_ZONE:
+ *type = THERMAL_TRIP_CRITICAL;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/* Get trip temperature callback functions for thermal zone */
+static int exynos_get_trip_temp(struct thermal_zone_device *thermal, int trip,
+ unsigned long *temp)
+{
+ if (trip < GET_TRIP(MONITOR_ZONE) || trip > GET_TRIP(PANIC_ZONE))
+ return -EINVAL;
+
+ *temp = th_zone->sensor_conf->trip_data.trip_val[trip];
+ /* convert the temperature into millicelsius */
+ *temp = *temp * MCELSIUS;
+
+ return 0;
+}
+
+/* Get critical temperature callback functions for thermal zone */
+static int exynos_get_crit_temp(struct thermal_zone_device *thermal,
+ unsigned long *temp)
+{
+ int ret;
+ /* Panic zone */
+ ret = exynos_get_trip_temp(thermal, GET_TRIP(PANIC_ZONE), temp);
+ return ret;
+}
+
+static int exynos_get_frequency_level(unsigned int cpu, unsigned int freq)
+{
+ int i = 0, ret = -EINVAL;
+ struct cpufreq_frequency_table *table = NULL;
+#ifdef CONFIG_CPU_FREQ
+ table = cpufreq_frequency_get_table(cpu);
+#endif
+ if (!table)
+ return ret;
+
+ while (table[i].frequency != CPUFREQ_TABLE_END) {
+ if (table[i].frequency == CPUFREQ_ENTRY_INVALID)
+ continue;
+ if (table[i].frequency == freq)
+ return i;
+ i++;
+ }
+ return ret;
+}
+
+/* Bind callback functions for thermal zone */
+static int exynos_bind(struct thermal_zone_device *thermal,
+ struct thermal_cooling_device *cdev)
+{
+ int ret = 0, i, tab_size, level;
+ struct freq_clip_table *tab_ptr, *clip_data;
+ struct thermal_sensor_conf *data = th_zone->sensor_conf;
+
+ tab_ptr = (struct freq_clip_table *)data->cooling_data.freq_data;
+ tab_size = data->cooling_data.freq_clip_count;
+
+ if (tab_ptr == NULL || tab_size == 0)
+ return -EINVAL;
+
+ /* find the cooling device registered*/
+ for (i = 0; i < th_zone->cool_dev_size; i++)
+ if (cdev == th_zone->cool_dev[i])
+ break;
+
+ /* No matching cooling device */
+ if (i == th_zone->cool_dev_size)
+ return 0;
+
+ /* Bind the thermal zone to the cpufreq cooling device */
+ for (i = 0; i < tab_size; i++) {
+ clip_data = (struct freq_clip_table *)&(tab_ptr[i]);
+ level = exynos_get_frequency_level(0, clip_data->freq_clip_max);
+ if (level < 0)
+ return 0;
+ switch (GET_ZONE(i)) {
+ case MONITOR_ZONE:
+ case WARN_ZONE:
+ if (thermal_zone_bind_cooling_device(thermal, i, cdev,
+ level, level)) {
+ pr_err("error binding cdev inst %d\n", i);
+ ret = -EINVAL;
+ }
+ th_zone->bind = true;
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ }
+
+ return ret;
+}
+
+/* Unbind callback functions for thermal zone */
+static int exynos_unbind(struct thermal_zone_device *thermal,
+ struct thermal_cooling_device *cdev)
+{
+ int ret = 0, i, tab_size;
+ struct thermal_sensor_conf *data = th_zone->sensor_conf;
+
+ if (th_zone->bind == false)
+ return 0;
+
+ tab_size = data->cooling_data.freq_clip_count;
+
+ if (tab_size == 0)
+ return -EINVAL;
+
+ /* find the cooling device registered*/
+ for (i = 0; i < th_zone->cool_dev_size; i++)
+ if (cdev == th_zone->cool_dev[i])
+ break;
+
+ /* No matching cooling device */
+ if (i == th_zone->cool_dev_size)
+ return 0;
+
+ /* Bind the thermal zone to the cpufreq cooling device */
+ for (i = 0; i < tab_size; i++) {
+ switch (GET_ZONE(i)) {
+ case MONITOR_ZONE:
+ case WARN_ZONE:
+ if (thermal_zone_unbind_cooling_device(thermal, i,
+ cdev)) {
+ pr_err("error unbinding cdev inst=%d\n", i);
+ ret = -EINVAL;
+ }
+ th_zone->bind = false;
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ }
+ return ret;
+}
+
+/* Get temperature callback functions for thermal zone */
+static int exynos_get_temp(struct thermal_zone_device *thermal,
+ unsigned long *temp)
+{
+ void *data;
+
+ if (!th_zone->sensor_conf) {
+ pr_info("Temperature sensor not initialised\n");
+ return -EINVAL;
+ }
+ data = th_zone->sensor_conf->private_data;
+ *temp = th_zone->sensor_conf->read_temperature(data);
+ /* convert the temperature into millicelsius */
+ *temp = *temp * MCELSIUS;
+ return 0;
+}
+
+/* Get the temperature trend */
+static int exynos_get_trend(struct thermal_zone_device *thermal,
+ int trip, enum thermal_trend *trend)
+{
+ if (thermal->temperature >= trip)
+ *trend = THERMAL_TREND_RAISING;
+ else
+ *trend = THERMAL_TREND_DROPPING;
+
+ return 0;
+}
+/* Operation callback functions for thermal zone */
+static struct thermal_zone_device_ops const exynos_dev_ops = {
+ .bind = exynos_bind,
+ .unbind = exynos_unbind,
+ .get_temp = exynos_get_temp,
+ .get_trend = exynos_get_trend,
+ .get_mode = exynos_get_mode,
+ .set_mode = exynos_set_mode,
+ .get_trip_type = exynos_get_trip_type,
+ .get_trip_temp = exynos_get_trip_temp,
+ .get_crit_temp = exynos_get_crit_temp,
+};
+
+/*
+ * This function may be called from interrupt based temperature sensor
+ * when threshold is changed.
+ */
+static void exynos_report_trigger(void)
+{
+ unsigned int i;
+ char data[10];
+ char *envp[] = { data, NULL };
+
+ if (!th_zone || !th_zone->therm_dev)
+ return;
+ if (th_zone->bind == false) {
+ for (i = 0; i < th_zone->cool_dev_size; i++) {
+ if (!th_zone->cool_dev[i])
+ continue;
+ exynos_bind(th_zone->therm_dev,
+ th_zone->cool_dev[i]);
+ }
+ }
+
+ thermal_zone_device_update(th_zone->therm_dev);
+
+ mutex_lock(&th_zone->therm_dev->lock);
+ /* Find the level for which trip happened */
+ for (i = 0; i < th_zone->sensor_conf->trip_data.trip_count; i++) {
+ if (th_zone->therm_dev->last_temperature <
+ th_zone->sensor_conf->trip_data.trip_val[i] * MCELSIUS)
+ break;
+ }
+
+ if (th_zone->mode == THERMAL_DEVICE_ENABLED) {
+ if (i > 0)
+ th_zone->therm_dev->polling_delay = ACTIVE_INTERVAL;
+ else
+ th_zone->therm_dev->polling_delay = IDLE_INTERVAL;
+ }
+
+ snprintf(data, sizeof(data), "%u", i);
+ kobject_uevent_env(&th_zone->therm_dev->device.kobj, KOBJ_CHANGE, envp);
+ mutex_unlock(&th_zone->therm_dev->lock);
+}
+
+/* Register with the in-kernel thermal management */
+static int exynos_register_thermal(struct thermal_sensor_conf *sensor_conf)
+{
+ int ret;
+ struct cpumask mask_val;
+
+ if (!sensor_conf || !sensor_conf->read_temperature) {
+ pr_err("Temperature sensor not initialised\n");
+ return -EINVAL;
+ }
+
+ th_zone = kzalloc(sizeof(struct exynos_thermal_zone), GFP_KERNEL);
+ if (!th_zone)
+ return -ENOMEM;
+
+ th_zone->sensor_conf = sensor_conf;
+ cpumask_set_cpu(0, &mask_val);
+ th_zone->cool_dev[0] = cpufreq_cooling_register(&mask_val);
+ if (IS_ERR(th_zone->cool_dev[0])) {
+ pr_err("Failed to register cpufreq cooling device\n");
+ ret = -EINVAL;
+ goto err_unregister;
+ }
+ th_zone->cool_dev_size++;
+
+ th_zone->therm_dev = thermal_zone_device_register(sensor_conf->name,
+ EXYNOS_ZONE_COUNT, 0, NULL, &exynos_dev_ops, 0,
+ IDLE_INTERVAL);
+
+ if (IS_ERR(th_zone->therm_dev)) {
+ pr_err("Failed to register thermal zone device\n");
+ ret = -EINVAL;
+ goto err_unregister;
+ }
+ th_zone->mode = THERMAL_DEVICE_ENABLED;
+
+ pr_info("Exynos: Kernel Thermal management registered\n");
+
+ return 0;
+
+err_unregister:
+ exynos_unregister_thermal();
+ return ret;
+}
+
+/* Un-Register with the in-kernel thermal management */
+static void exynos_unregister_thermal(void)
+{
+ int i;
+
+ if (!th_zone)
+ return;
+
+ if (th_zone->therm_dev)
+ thermal_zone_device_unregister(th_zone->therm_dev);
+
+ for (i = 0; i < th_zone->cool_dev_size; i++) {
+ if (th_zone->cool_dev[i])
+ cpufreq_cooling_unregister(th_zone->cool_dev[i]);
+ }
+
+ kfree(th_zone);
+ pr_info("Exynos: Kernel Thermal management unregistered\n");
+}
+
+/*
+ * TMU treats temperature as a mapped temperature code.
+ * The temperature is converted differently depending on the calibration type.
+ */
+static int temp_to_code(struct exynos_tmu_data *data, u8 temp)
+{
+ struct exynos_tmu_platform_data *pdata = data->pdata;
+ int temp_code;
+
+ if (data->soc == SOC_ARCH_EXYNOS4210)
+ /* temp should range between 25 and 125 */
+ if (temp < 25 || temp > 125) {
+ temp_code = -EINVAL;
+ goto out;
+ }
+
+ switch (pdata->cal_type) {
+ case TYPE_TWO_POINT_TRIMMING:
+ temp_code = (temp - 25) *
+ (data->temp_error2 - data->temp_error1) /
+ (85 - 25) + data->temp_error1;
+ break;
+ case TYPE_ONE_POINT_TRIMMING:
+ temp_code = temp + data->temp_error1 - 25;
+ break;
+ default:
+ temp_code = temp + EXYNOS_TMU_DEF_CODE_TO_TEMP_OFFSET;
+ break;
+ }
+out:
+ return temp_code;
+}
+
+/*
+ * Calculate a temperature value from a temperature code.
+ * The unit of the temperature is degree Celsius.
+ */
+static int code_to_temp(struct exynos_tmu_data *data, u8 temp_code)
+{
+ struct exynos_tmu_platform_data *pdata = data->pdata;
+ int temp;
+
+ if (data->soc == SOC_ARCH_EXYNOS4210)
+ /* temp_code should range between 75 and 175 */
+ if (temp_code < 75 || temp_code > 175) {
+ temp = -ENODATA;
+ goto out;
+ }
+
+ switch (pdata->cal_type) {
+ case TYPE_TWO_POINT_TRIMMING:
+ temp = (temp_code - data->temp_error1) * (85 - 25) /
+ (data->temp_error2 - data->temp_error1) + 25;
+ break;
+ case TYPE_ONE_POINT_TRIMMING:
+ temp = temp_code - data->temp_error1 + 25;
+ break;
+ default:
+ temp = temp_code - EXYNOS_TMU_DEF_CODE_TO_TEMP_OFFSET;
+ break;
+ }
+out:
+ return temp;
+}
+
+static int exynos_tmu_initialize(struct platform_device *pdev)
+{
+ struct exynos_tmu_data *data = platform_get_drvdata(pdev);
+ struct exynos_tmu_platform_data *pdata = data->pdata;
+ unsigned int status, trim_info, rising_threshold;
+ int ret = 0, threshold_code;
+
+ mutex_lock(&data->lock);
+ clk_enable(data->clk);
+
+ status = readb(data->base + EXYNOS_TMU_REG_STATUS);
+ if (!status) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ if (data->soc == SOC_ARCH_EXYNOS) {
+ __raw_writel(EXYNOS_TRIMINFO_RELOAD,
+ data->base + EXYNOS_TMU_TRIMINFO_CON);
+ }
+ /* Save trimming info in order to perform calibration */
+ trim_info = readl(data->base + EXYNOS_TMU_REG_TRIMINFO);
+ data->temp_error1 = trim_info & EXYNOS_TMU_TRIM_TEMP_MASK;
+ data->temp_error2 = ((trim_info >> 8) & EXYNOS_TMU_TRIM_TEMP_MASK);
+
+ if ((EFUSE_MIN_VALUE > data->temp_error1) ||
+ (data->temp_error1 > EFUSE_MAX_VALUE) ||
+ (data->temp_error2 != 0))
+ data->temp_error1 = pdata->efuse_value;
+
+ if (data->soc == SOC_ARCH_EXYNOS4210) {
+ /* Write temperature code for threshold */
+ threshold_code = temp_to_code(data, pdata->threshold);
+ if (threshold_code < 0) {
+ ret = threshold_code;
+ goto out;
+ }
+ writeb(threshold_code,
+ data->base + EXYNOS4210_TMU_REG_THRESHOLD_TEMP);
+
+ writeb(pdata->trigger_levels[0],
+ data->base + EXYNOS4210_TMU_REG_TRIG_LEVEL0);
+ writeb(pdata->trigger_levels[1],
+ data->base + EXYNOS4210_TMU_REG_TRIG_LEVEL1);
+ writeb(pdata->trigger_levels[2],
+ data->base + EXYNOS4210_TMU_REG_TRIG_LEVEL2);
+ writeb(pdata->trigger_levels[3],
+ data->base + EXYNOS4210_TMU_REG_TRIG_LEVEL3);
+
+ writel(EXYNOS4210_TMU_INTCLEAR_VAL,
+ data->base + EXYNOS_TMU_REG_INTCLEAR);
+ } else if (data->soc == SOC_ARCH_EXYNOS) {
+ /* Write temperature code for threshold */
+ threshold_code = temp_to_code(data, pdata->trigger_levels[0]);
+ if (threshold_code < 0) {
+ ret = threshold_code;
+ goto out;
+ }
+ rising_threshold = threshold_code;
+ threshold_code = temp_to_code(data, pdata->trigger_levels[1]);
+ if (threshold_code < 0) {
+ ret = threshold_code;
+ goto out;
+ }
+ rising_threshold |= (threshold_code << 8);
+ threshold_code = temp_to_code(data, pdata->trigger_levels[2]);
+ if (threshold_code < 0) {
+ ret = threshold_code;
+ goto out;
+ }
+ rising_threshold |= (threshold_code << 16);
+
+ writel(rising_threshold,
+ data->base + EXYNOS_THD_TEMP_RISE);
+ writel(0, data->base + EXYNOS_THD_TEMP_FALL);
+
+ writel(EXYNOS_TMU_CLEAR_RISE_INT|EXYNOS_TMU_CLEAR_FALL_INT,
+ data->base + EXYNOS_TMU_REG_INTCLEAR);
+ }
+out:
+ clk_disable(data->clk);
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static void exynos_tmu_control(struct platform_device *pdev, bool on)
+{
+ struct exynos_tmu_data *data = platform_get_drvdata(pdev);
+ struct exynos_tmu_platform_data *pdata = data->pdata;
+ unsigned int con, interrupt_en;
+
+ mutex_lock(&data->lock);
+ clk_enable(data->clk);
+
+ con = pdata->reference_voltage << EXYNOS_TMU_REF_VOLTAGE_SHIFT |
+ pdata->gain << EXYNOS_TMU_GAIN_SHIFT;
+
+ if (data->soc == SOC_ARCH_EXYNOS) {
+ con |= pdata->noise_cancel_mode << EXYNOS_TMU_TRIP_MODE_SHIFT;
+ con |= (EXYNOS_MUX_ADDR_VALUE << EXYNOS_MUX_ADDR_SHIFT);
+ }
+
+ if (on) {
+ con |= EXYNOS_TMU_CORE_ON;
+ interrupt_en = pdata->trigger_level3_en << 12 |
+ pdata->trigger_level2_en << 8 |
+ pdata->trigger_level1_en << 4 |
+ pdata->trigger_level0_en;
+ } else {
+ con |= EXYNOS_TMU_CORE_OFF;
+ interrupt_en = 0; /* Disable all interrupts */
+ }
+ writel(interrupt_en, data->base + EXYNOS_TMU_REG_INTEN);
+ writel(con, data->base + EXYNOS_TMU_REG_CONTROL);
+
+ clk_disable(data->clk);
+ mutex_unlock(&data->lock);
+}
+
+static int exynos_tmu_read(struct exynos_tmu_data *data)
+{
+ u8 temp_code;
+ int temp;
+
+ mutex_lock(&data->lock);
+ clk_enable(data->clk);
+
+ temp_code = readb(data->base + EXYNOS_TMU_REG_CURRENT_TEMP);
+ temp = code_to_temp(data, temp_code);
+
+ clk_disable(data->clk);
+ mutex_unlock(&data->lock);
+
+ return temp;
+}
+
+static void exynos_tmu_work(struct work_struct *work)
+{
+ struct exynos_tmu_data *data = container_of(work,
+ struct exynos_tmu_data, irq_work);
+
+ mutex_lock(&data->lock);
+ clk_enable(data->clk);
+
+
+ if (data->soc == SOC_ARCH_EXYNOS)
+ writel(EXYNOS_TMU_CLEAR_RISE_INT,
+ data->base + EXYNOS_TMU_REG_INTCLEAR);
+ else
+ writel(EXYNOS4210_TMU_INTCLEAR_VAL,
+ data->base + EXYNOS_TMU_REG_INTCLEAR);
+
+ clk_disable(data->clk);
+ mutex_unlock(&data->lock);
+ exynos_report_trigger();
+ enable_irq(data->irq);
+}
+
+static irqreturn_t exynos_tmu_irq(int irq, void *id)
+{
+ struct exynos_tmu_data *data = id;
+
+ disable_irq_nosync(irq);
+ schedule_work(&data->irq_work);
+
+ return IRQ_HANDLED;
+}
+static struct thermal_sensor_conf exynos_sensor_conf = {
+ .name = "exynos-therm",
+ .read_temperature = (int (*)(void *))exynos_tmu_read,
+};
+
+#if defined(CONFIG_CPU_EXYNOS4210)
+static struct exynos_tmu_platform_data const exynos4210_default_tmu_data = {
+ .threshold = 80,
+ .trigger_levels[0] = 5,
+ .trigger_levels[1] = 20,
+ .trigger_levels[2] = 30,
+ .trigger_level0_en = 1,
+ .trigger_level1_en = 1,
+ .trigger_level2_en = 1,
+ .trigger_level3_en = 0,
+ .gain = 15,
+ .reference_voltage = 7,
+ .cal_type = TYPE_ONE_POINT_TRIMMING,
+ .freq_tab[0] = {
+ .freq_clip_max = 800 * 1000,
+ .temp_level = 85,
+ },
+ .freq_tab[1] = {
+ .freq_clip_max = 200 * 1000,
+ .temp_level = 100,
+ },
+ .freq_tab_count = 2,
+ .type = SOC_ARCH_EXYNOS4210,
+};
+#define EXYNOS4210_TMU_DRV_DATA (&exynos4210_default_tmu_data)
+#else
+#define EXYNOS4210_TMU_DRV_DATA (NULL)
+#endif
+
+#if defined(CONFIG_SOC_EXYNOS5250) || defined(CONFIG_SOC_EXYNOS4412)
+static struct exynos_tmu_platform_data const exynos_default_tmu_data = {
+ .trigger_levels[0] = 85,
+ .trigger_levels[1] = 103,
+ .trigger_levels[2] = 110,
+ .trigger_level0_en = 1,
+ .trigger_level1_en = 1,
+ .trigger_level2_en = 1,
+ .trigger_level3_en = 0,
+ .gain = 8,
+ .reference_voltage = 16,
+ .noise_cancel_mode = 4,
+ .cal_type = TYPE_ONE_POINT_TRIMMING,
+ .efuse_value = 55,
+ .freq_tab[0] = {
+ .freq_clip_max = 800 * 1000,
+ .temp_level = 85,
+ },
+ .freq_tab[1] = {
+ .freq_clip_max = 200 * 1000,
+ .temp_level = 103,
+ },
+ .freq_tab_count = 2,
+ .type = SOC_ARCH_EXYNOS,
+};
+#define EXYNOS_TMU_DRV_DATA (&exynos_default_tmu_data)
+#else
+#define EXYNOS_TMU_DRV_DATA (NULL)
+#endif
+
+#ifdef CONFIG_OF
+static const struct of_device_id exynos_tmu_match[] = {
+ {
+ .compatible = "samsung,exynos4210-tmu",
+ .data = (void *)EXYNOS4210_TMU_DRV_DATA,
+ },
+ {
+ .compatible = "samsung,exynos5250-tmu",
+ .data = (void *)EXYNOS_TMU_DRV_DATA,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, exynos_tmu_match);
+#else
+#define exynos_tmu_match NULL
+#endif
+
+static struct platform_device_id exynos_tmu_driver_ids[] = {
+ {
+ .name = "exynos4210-tmu",
+ .driver_data = (kernel_ulong_t)EXYNOS4210_TMU_DRV_DATA,
+ },
+ {
+ .name = "exynos5250-tmu",
+ .driver_data = (kernel_ulong_t)EXYNOS_TMU_DRV_DATA,
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(platform, exynos4_tmu_driver_ids);
+
+static inline struct exynos_tmu_platform_data *exynos_get_driver_data(
+ struct platform_device *pdev)
+{
+#ifdef CONFIG_OF
+ if (pdev->dev.of_node) {
+ const struct of_device_id *match;
+ match = of_match_node(exynos_tmu_match, pdev->dev.of_node);
+ if (!match)
+ return NULL;
+ return (struct exynos_tmu_platform_data *) match->data;
+ }
+#endif
+ return (struct exynos_tmu_platform_data *)
+ platform_get_device_id(pdev)->driver_data;
+}
+static int __devinit exynos_tmu_probe(struct platform_device *pdev)
+{
+ struct exynos_tmu_data *data;
+ struct exynos_tmu_platform_data *pdata = pdev->dev.platform_data;
+ int ret, i;
+
+ if (!pdata)
+ pdata = exynos_get_driver_data(pdev);
+
+ if (!pdata) {
+ dev_err(&pdev->dev, "No platform init data supplied.\n");
+ return -ENODEV;
+ }
+ data = devm_kzalloc(&pdev->dev, sizeof(struct exynos_tmu_data),
+ GFP_KERNEL);
+ if (!data) {
+ dev_err(&pdev->dev, "Failed to allocate driver structure\n");
+ return -ENOMEM;
+ }
+
+ data->irq = platform_get_irq(pdev, 0);
+ if (data->irq < 0) {
+ dev_err(&pdev->dev, "Failed to get platform irq\n");
+ return data->irq;
+ }
+
+ INIT_WORK(&data->irq_work, exynos_tmu_work);
+
+ data->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!data->mem) {
+ dev_err(&pdev->dev, "Failed to get platform resource\n");
+ return -ENOENT;
+ }
+
+ data->base = devm_request_and_ioremap(&pdev->dev, data->mem);
+ if (!data->base) {
+ dev_err(&pdev->dev, "Failed to ioremap memory\n");
+ return -ENODEV;
+ }
+
+ ret = devm_request_irq(&pdev->dev, data->irq, exynos_tmu_irq,
+ IRQF_TRIGGER_RISING, "exynos-tmu", data);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to request irq: %d\n", data->irq);
+ return ret;
+ }
+
+ data->clk = clk_get(NULL, "tmu_apbif");
+ if (IS_ERR(data->clk)) {
+ dev_err(&pdev->dev, "Failed to get clock\n");
+ return PTR_ERR(data->clk);
+ }
+
+ if (pdata->type == SOC_ARCH_EXYNOS ||
+ pdata->type == SOC_ARCH_EXYNOS4210)
+ data->soc = pdata->type;
+ else {
+ ret = -EINVAL;
+ dev_err(&pdev->dev, "Platform not supported\n");
+ goto err_clk;
+ }
+
+ data->pdata = pdata;
+ platform_set_drvdata(pdev, data);
+ mutex_init(&data->lock);
+
+ ret = exynos_tmu_initialize(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to initialize TMU\n");
+ goto err_clk;
+ }
+
+ exynos_tmu_control(pdev, true);
+
+ /* Register the sensor with thermal management interface */
+ (&exynos_sensor_conf)->private_data = data;
+ exynos_sensor_conf.trip_data.trip_count = pdata->trigger_level0_en +
+ pdata->trigger_level1_en + pdata->trigger_level2_en +
+ pdata->trigger_level3_en;
+
+ for (i = 0; i < exynos_sensor_conf.trip_data.trip_count; i++)
+ exynos_sensor_conf.trip_data.trip_val[i] =
+ pdata->threshold + pdata->trigger_levels[i];
+
+ exynos_sensor_conf.cooling_data.freq_clip_count =
+ pdata->freq_tab_count;
+ for (i = 0; i < pdata->freq_tab_count; i++) {
+ exynos_sensor_conf.cooling_data.freq_data[i].freq_clip_max =
+ pdata->freq_tab[i].freq_clip_max;
+ exynos_sensor_conf.cooling_data.freq_data[i].temp_level =
+ pdata->freq_tab[i].temp_level;
+ }
+
+ ret = exynos_register_thermal(&exynos_sensor_conf);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to register thermal interface\n");
+ goto err_clk;
+ }
+ return 0;
+err_clk:
+ platform_set_drvdata(pdev, NULL);
+ clk_put(data->clk);
+ return ret;
+}
+
+static int __devexit exynos_tmu_remove(struct platform_device *pdev)
+{
+ struct exynos_tmu_data *data = platform_get_drvdata(pdev);
+
+ exynos_tmu_control(pdev, false);
+
+ exynos_unregister_thermal();
+
+ clk_put(data->clk);
+
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int exynos_tmu_suspend(struct device *dev)
+{
+ exynos_tmu_control(to_platform_device(dev), false);
+
+ return 0;
+}
+
+static int exynos_tmu_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+
+ exynos_tmu_initialize(pdev);
+ exynos_tmu_control(pdev, true);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(exynos_tmu_pm,
+ exynos_tmu_suspend, exynos_tmu_resume);
+#define EXYNOS_TMU_PM (&exynos_tmu_pm)
+#else
+#define EXYNOS_TMU_PM NULL
+#endif
+
+static struct platform_driver exynos_tmu_driver = {
+ .driver = {
+ .name = "exynos-tmu",
+ .owner = THIS_MODULE,
+ .pm = EXYNOS_TMU_PM,
+ .of_match_table = exynos_tmu_match,
+ },
+ .probe = exynos_tmu_probe,
+ .remove = __devexit_p(exynos_tmu_remove),
+ .id_table = exynos_tmu_driver_ids,
+};
+
+module_platform_driver(exynos_tmu_driver);
+
+MODULE_DESCRIPTION("EXYNOS TMU Driver");
+MODULE_AUTHOR("Donggeun Kim <dg77.kim@samsung.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:exynos-tmu");
--- /dev/null
+/*
+ * R-Car THS/TSC thermal sensor driver
+ *
+ * Copyright (C) 2012 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.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; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/thermal.h>
+
+#define THSCR 0x2c
+#define THSSR 0x30
+
+/* THSCR */
+#define CPTAP 0xf
+
+/* THSSR */
+#define CTEMP 0x3f
+
+
+struct rcar_thermal_priv {
+ void __iomem *base;
+ struct device *dev;
+ spinlock_t lock;
+ u32 comp;
+};
+
+/*
+ * basic functions
+ */
+static u32 rcar_thermal_read(struct rcar_thermal_priv *priv, u32 reg)
+{
+ unsigned long flags;
+ u32 ret;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ ret = ioread32(priv->base + reg);
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return ret;
+}
+
+#if 0 /* no user at this point */
+static void rcar_thermal_write(struct rcar_thermal_priv *priv,
+ u32 reg, u32 data)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ iowrite32(data, priv->base + reg);
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+}
+#endif
+
+static void rcar_thermal_bset(struct rcar_thermal_priv *priv, u32 reg,
+ u32 mask, u32 data)
+{
+ unsigned long flags;
+ u32 val;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ val = ioread32(priv->base + reg);
+ val &= ~mask;
+ val |= (data & mask);
+ iowrite32(val, priv->base + reg);
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+}
+
+/*
+ * zone device functions
+ */
+static int rcar_thermal_get_temp(struct thermal_zone_device *zone,
+ unsigned long *temp)
+{
+ struct rcar_thermal_priv *priv = zone->devdata;
+ int val, min, max, tmp;
+
+ tmp = -200; /* default */
+ while (1) {
+ if (priv->comp < 1 || priv->comp > 12) {
+ dev_err(priv->dev,
+ "THSSR invalid data (%d)\n", priv->comp);
+ priv->comp = 4; /* for next thermal */
+ return -EINVAL;
+ }
+
+ /*
+ * THS comparator offset and the reference temperature
+ *
+ * Comparator | reference | Temperature field
+ * offset | temperature | measurement
+ * | (degrees C) | (degrees C)
+ * -------------+---------------+-------------------
+ * 1 | -45 | -45 to -30
+ * 2 | -30 | -30 to -15
+ * 3 | -15 | -15 to 0
+ * 4 | 0 | 0 to +15
+ * 5 | +15 | +15 to +30
+ * 6 | +30 | +30 to +45
+ * 7 | +45 | +45 to +60
+ * 8 | +60 | +60 to +75
+ * 9 | +75 | +75 to +90
+ * 10 | +90 | +90 to +105
+ * 11 | +105 | +105 to +120
+ * 12 | +120 | +120 to +135
+ */
+
+ /* calculate thermal limitation */
+ min = (priv->comp * 15) - 60;
+ max = min + 15;
+
+ /*
+ * we need to wait 300us after changing comparator offset
+ * to get stable temperature.
+ * see "Usage Notes" on datasheet
+ */
+ rcar_thermal_bset(priv, THSCR, CPTAP, priv->comp);
+ udelay(300);
+
+ /* calculate current temperature */
+ val = rcar_thermal_read(priv, THSSR) & CTEMP;
+ val = (val * 5) - 65;
+
+ dev_dbg(priv->dev, "comp/min/max/val = %d/%d/%d/%d\n",
+ priv->comp, min, max, val);
+
+ /*
+ * If val is same as min/max, then,
+ * it should try again on next comparator.
+ * But the val might be correct temperature.
+ * Keep it on "tmp" and compare with next val.
+ */
+ if (tmp == val)
+ break;
+
+ if (val <= min) {
+ tmp = min;
+ priv->comp--; /* try again */
+ } else if (val >= max) {
+ tmp = max;
+ priv->comp++; /* try again */
+ } else {
+ tmp = val;
+ break;
+ }
+ }
+
+ *temp = tmp;
+ return 0;
+}
+
+static struct thermal_zone_device_ops rcar_thermal_zone_ops = {
+ .get_temp = rcar_thermal_get_temp,
+};
+
+/*
+ * platform functions
+ */
+static int rcar_thermal_probe(struct platform_device *pdev)
+{
+ struct thermal_zone_device *zone;
+ struct rcar_thermal_priv *priv;
+ struct resource *res;
+ int ret;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "Could not get platform resource\n");
+ return -ENODEV;
+ }
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv) {
+ dev_err(&pdev->dev, "Could not allocate priv\n");
+ return -ENOMEM;
+ }
+
+ priv->comp = 4; /* basic setup */
+ priv->dev = &pdev->dev;
+ spin_lock_init(&priv->lock);
+ priv->base = devm_ioremap_nocache(&pdev->dev,
+ res->start, resource_size(res));
+ if (!priv->base) {
+ dev_err(&pdev->dev, "Unable to ioremap thermal register\n");
+ ret = -ENOMEM;
+ goto error_free_priv;
+ }
+
+ zone = thermal_zone_device_register("rcar_thermal", 0, priv,
+ &rcar_thermal_zone_ops, 0, 0);
+ if (IS_ERR(zone)) {
+ dev_err(&pdev->dev, "thermal zone device is NULL\n");
+ ret = PTR_ERR(zone);
+ goto error_iounmap;
+ }
+
+ platform_set_drvdata(pdev, zone);
+
+ dev_info(&pdev->dev, "proved\n");
+
+ return 0;
+
+error_iounmap:
+ devm_iounmap(&pdev->dev, priv->base);
+error_free_priv:
+ devm_kfree(&pdev->dev, priv);
+
+ return ret;
+}
+
+static int rcar_thermal_remove(struct platform_device *pdev)
+{
+ struct thermal_zone_device *zone = platform_get_drvdata(pdev);
+ struct rcar_thermal_priv *priv = zone->devdata;
+
+ thermal_zone_device_unregister(zone);
+ platform_set_drvdata(pdev, NULL);
+
+ devm_iounmap(&pdev->dev, priv->base);
+ devm_kfree(&pdev->dev, priv);
+
+ return 0;
+}
+
+static struct platform_driver rcar_thermal_driver = {
+ .driver = {
+ .name = "rcar_thermal",
+ },
+ .probe = rcar_thermal_probe,
+ .remove = rcar_thermal_remove,
+};
+module_platform_driver(rcar_thermal_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("R-Car THS/TSC thermal sensor driver");
+MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
writel_relaxed(stdev->flags, stdev->thermal_base);
spear_thermal = thermal_zone_device_register("spear_thermal", 0, 0,
- stdev, &ops, 0, 0, 0, 0);
+ stdev, &ops, 0, 0);
if (IS_ERR(spear_thermal)) {
dev_err(&pdev->dev, "thermal zone device is NULL\n");
ret = PTR_ERR(spear_thermal);
MODULE_DESCRIPTION("Generic thermal management sysfs support");
MODULE_LICENSE("GPL");
-struct thermal_cooling_device_instance {
+#define THERMAL_NO_TARGET -1UL
+/*
+ * This structure is used to describe the behavior of
+ * a certain cooling device on a certain trip point
+ * in a certain thermal zone
+ */
+struct thermal_instance {
int id;
char name[THERMAL_NAME_LENGTH];
struct thermal_zone_device *tz;
struct thermal_cooling_device *cdev;
int trip;
+ unsigned long upper; /* Highest cooling state for this trip point */
+ unsigned long lower; /* Lowest cooling state for this trip point */
+ unsigned long target; /* expected cooling state */
char attr_name[THERMAL_NAME_LENGTH];
struct device_attribute attr;
- struct list_head node;
+ struct list_head tz_node; /* node in tz->thermal_instances */
+ struct list_head cdev_node; /* node in cdev->thermal_instances */
};
static DEFINE_IDR(thermal_tz_idr);
if (!strncmp("Processor", cdev->type,
sizeof("Processor")))
thermal_zone_bind_cooling_device(tz,
- THERMAL_TRIPS_NONE,
- cdev);
+ THERMAL_TRIPS_NONE, cdev,
+ THERMAL_NO_LIMIT,
+ THERMAL_NO_LIMIT);
}
mutex_unlock(&thermal_list_lock);
if (!tz->passive_delay)
tz->passive_delay = 0;
}
- tz->tc1 = 1;
- tz->tc2 = 1;
-
tz->forced_passive = state;
thermal_zone_device_update(tz);
thermal_cooling_device_trip_point_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct thermal_cooling_device_instance *instance;
+ struct thermal_instance *instance;
instance =
- container_of(attr, struct thermal_cooling_device_instance, attr);
+ container_of(attr, struct thermal_instance, attr);
if (instance->trip == THERMAL_TRIPS_NONE)
return sprintf(buf, "-1\n");
temp->tz = tz;
hwmon->count++;
- snprintf(temp->temp_input.name, THERMAL_NAME_LENGTH,
+ snprintf(temp->temp_input.name, sizeof(temp->temp_input.name),
"temp%d_input", hwmon->count);
temp->temp_input.attr.attr.name = temp->temp_input.name;
temp->temp_input.attr.attr.mode = 0444;
if (tz->ops->get_crit_temp) {
unsigned long temperature;
if (!tz->ops->get_crit_temp(tz, &temperature)) {
- snprintf(temp->temp_crit.name, THERMAL_NAME_LENGTH,
+ snprintf(temp->temp_crit.name,
+ sizeof(temp->temp_crit.name),
"temp%d_crit", hwmon->count);
temp->temp_crit.attr.attr.name = temp->temp_crit.name;
temp->temp_crit.attr.attr.mode = 0444;
cancel_delayed_work(&tz->poll_queue);
}
-static void thermal_zone_device_passive(struct thermal_zone_device *tz,
- int temp, int trip_temp, int trip)
-{
- int trend = 0;
- struct thermal_cooling_device_instance *instance;
- struct thermal_cooling_device *cdev;
- long state, max_state;
-
- /*
- * Above Trip?
- * -----------
- * Calculate the thermal trend (using the passive cooling equation)
- * and modify the performance limit for all passive cooling devices
- * accordingly. Note that we assume symmetry.
- */
- if (temp >= trip_temp) {
- tz->passive = true;
-
- trend = (tz->tc1 * (temp - tz->last_temperature)) +
- (tz->tc2 * (temp - trip_temp));
-
- /* Heating up? */
- if (trend > 0) {
- list_for_each_entry(instance, &tz->cooling_devices,
- node) {
- if (instance->trip != trip)
- continue;
- cdev = instance->cdev;
- cdev->ops->get_cur_state(cdev, &state);
- cdev->ops->get_max_state(cdev, &max_state);
- if (state++ < max_state)
- cdev->ops->set_cur_state(cdev, state);
- }
- } else if (trend < 0) { /* Cooling off? */
- list_for_each_entry(instance, &tz->cooling_devices,
- node) {
- if (instance->trip != trip)
- continue;
- cdev = instance->cdev;
- cdev->ops->get_cur_state(cdev, &state);
- cdev->ops->get_max_state(cdev, &max_state);
- if (state > 0)
- cdev->ops->set_cur_state(cdev, --state);
- }
- }
- return;
- }
-
- /*
- * Below Trip?
- * -----------
- * Implement passive cooling hysteresis to slowly increase performance
- * and avoid thrashing around the passive trip point. Note that we
- * assume symmetry.
- */
- list_for_each_entry(instance, &tz->cooling_devices, node) {
- if (instance->trip != trip)
- continue;
- cdev = instance->cdev;
- cdev->ops->get_cur_state(cdev, &state);
- cdev->ops->get_max_state(cdev, &max_state);
- if (state > 0)
- cdev->ops->set_cur_state(cdev, --state);
- if (state == 0)
- tz->passive = false;
- }
-}
-
static void thermal_zone_device_check(struct work_struct *work)
{
struct thermal_zone_device *tz = container_of(work, struct
*/
int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
int trip,
- struct thermal_cooling_device *cdev)
+ struct thermal_cooling_device *cdev,
+ unsigned long upper, unsigned long lower)
{
- struct thermal_cooling_device_instance *dev;
- struct thermal_cooling_device_instance *pos;
+ struct thermal_instance *dev;
+ struct thermal_instance *pos;
struct thermal_zone_device *pos1;
struct thermal_cooling_device *pos2;
+ unsigned long max_state;
int result;
if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE))
if (tz != pos1 || cdev != pos2)
return -EINVAL;
+ cdev->ops->get_max_state(cdev, &max_state);
+
+ /* lower default 0, upper default max_state */
+ lower = lower == THERMAL_NO_LIMIT ? 0 : lower;
+ upper = upper == THERMAL_NO_LIMIT ? max_state : upper;
+
+ if (lower > upper || upper > max_state)
+ return -EINVAL;
+
dev =
- kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL);
+ kzalloc(sizeof(struct thermal_instance), GFP_KERNEL);
if (!dev)
return -ENOMEM;
dev->tz = tz;
dev->cdev = cdev;
dev->trip = trip;
+ dev->upper = upper;
+ dev->lower = lower;
+ dev->target = THERMAL_NO_TARGET;
+
result = get_idr(&tz->idr, &tz->lock, &dev->id);
if (result)
goto free_mem;
goto remove_symbol_link;
mutex_lock(&tz->lock);
- list_for_each_entry(pos, &tz->cooling_devices, node)
+ mutex_lock(&cdev->lock);
+ list_for_each_entry(pos, &tz->thermal_instances, tz_node)
if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
result = -EEXIST;
break;
}
- if (!result)
- list_add_tail(&dev->node, &tz->cooling_devices);
+ if (!result) {
+ list_add_tail(&dev->tz_node, &tz->thermal_instances);
+ list_add_tail(&dev->cdev_node, &cdev->thermal_instances);
+ }
+ mutex_unlock(&cdev->lock);
mutex_unlock(&tz->lock);
if (!result)
int trip,
struct thermal_cooling_device *cdev)
{
- struct thermal_cooling_device_instance *pos, *next;
+ struct thermal_instance *pos, *next;
mutex_lock(&tz->lock);
- list_for_each_entry_safe(pos, next, &tz->cooling_devices, node) {
+ mutex_lock(&cdev->lock);
+ list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) {
if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
- list_del(&pos->node);
+ list_del(&pos->tz_node);
+ list_del(&pos->cdev_node);
+ mutex_unlock(&cdev->lock);
mutex_unlock(&tz->lock);
goto unbind;
}
}
+ mutex_unlock(&cdev->lock);
mutex_unlock(&tz->lock);
return -ENODEV;
struct thermal_zone_device *pos;
int result;
- if (strlen(type) >= THERMAL_NAME_LENGTH)
+ if (type && strlen(type) >= THERMAL_NAME_LENGTH)
return ERR_PTR(-EINVAL);
if (!ops || !ops->get_max_state || !ops->get_cur_state ||
return ERR_PTR(result);
}
- strcpy(cdev->type, type);
+ strcpy(cdev->type, type ? : "");
+ mutex_init(&cdev->lock);
+ INIT_LIST_HEAD(&cdev->thermal_instances);
cdev->ops = ops;
+ cdev->updated = true;
cdev->device.class = &thermal_class;
cdev->devdata = devdata;
dev_set_name(&cdev->device, "cooling_device%d", cdev->id);
}
EXPORT_SYMBOL(thermal_cooling_device_unregister);
+static void thermal_cdev_do_update(struct thermal_cooling_device *cdev)
+{
+ struct thermal_instance *instance;
+ unsigned long target = 0;
+
+ /* cooling device is updated*/
+ if (cdev->updated)
+ return;
+
+ mutex_lock(&cdev->lock);
+ /* Make sure cdev enters the deepest cooling state */
+ list_for_each_entry(instance, &cdev->thermal_instances, cdev_node) {
+ if (instance->target == THERMAL_NO_TARGET)
+ continue;
+ if (instance->target > target)
+ target = instance->target;
+ }
+ mutex_unlock(&cdev->lock);
+ cdev->ops->set_cur_state(cdev, target);
+ cdev->updated = true;
+}
+
+static void thermal_zone_do_update(struct thermal_zone_device *tz)
+{
+ struct thermal_instance *instance;
+
+ list_for_each_entry(instance, &tz->thermal_instances, tz_node)
+ thermal_cdev_do_update(instance->cdev);
+}
+
+/*
+ * Cooling algorithm for both active and passive cooling
+ *
+ * 1. if the temperature is higher than a trip point,
+ * a. if the trend is THERMAL_TREND_RAISING, use higher cooling
+ * state for this trip point
+ * b. if the trend is THERMAL_TREND_DROPPING, use lower cooling
+ * state for this trip point
+ *
+ * 2. if the temperature is lower than a trip point, use lower
+ * cooling state for this trip point
+ *
+ * Note that this behaves the same as the previous passive cooling
+ * algorithm.
+ */
+
+static void thermal_zone_trip_update(struct thermal_zone_device *tz,
+ int trip, long temp)
+{
+ struct thermal_instance *instance;
+ struct thermal_cooling_device *cdev = NULL;
+ unsigned long cur_state, max_state;
+ long trip_temp;
+ enum thermal_trip_type trip_type;
+ enum thermal_trend trend;
+
+ if (trip == THERMAL_TRIPS_NONE) {
+ trip_temp = tz->forced_passive;
+ trip_type = THERMAL_TRIPS_NONE;
+ } else {
+ tz->ops->get_trip_temp(tz, trip, &trip_temp);
+ tz->ops->get_trip_type(tz, trip, &trip_type);
+ }
+
+ if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) {
+ /*
+ * compare the current temperature and previous temperature
+ * to get the thermal trend, if no special requirement
+ */
+ if (tz->temperature > tz->last_temperature)
+ trend = THERMAL_TREND_RAISING;
+ else if (tz->temperature < tz->last_temperature)
+ trend = THERMAL_TREND_DROPPING;
+ else
+ trend = THERMAL_TREND_STABLE;
+ }
+
+ if (temp >= trip_temp) {
+ list_for_each_entry(instance, &tz->thermal_instances, tz_node) {
+ if (instance->trip != trip)
+ continue;
+
+ cdev = instance->cdev;
+
+ cdev->ops->get_cur_state(cdev, &cur_state);
+ cdev->ops->get_max_state(cdev, &max_state);
+
+ if (trend == THERMAL_TREND_RAISING) {
+ cur_state = cur_state < instance->upper ?
+ (cur_state + 1) : instance->upper;
+ } else if (trend == THERMAL_TREND_DROPPING) {
+ cur_state = cur_state > instance->lower ?
+ (cur_state - 1) : instance->lower;
+ }
+
+ /* activate a passive thermal instance */
+ if ((trip_type == THERMAL_TRIP_PASSIVE ||
+ trip_type == THERMAL_TRIPS_NONE) &&
+ instance->target == THERMAL_NO_TARGET)
+ tz->passive++;
+
+ instance->target = cur_state;
+ cdev->updated = false; /* cooling device needs update */
+ }
+ } else { /* below trip */
+ list_for_each_entry(instance, &tz->thermal_instances, tz_node) {
+ if (instance->trip != trip)
+ continue;
+
+ /* Do not use the inactive thermal instance */
+ if (instance->target == THERMAL_NO_TARGET)
+ continue;
+ cdev = instance->cdev;
+ cdev->ops->get_cur_state(cdev, &cur_state);
+
+ cur_state = cur_state > instance->lower ?
+ (cur_state - 1) : THERMAL_NO_TARGET;
+
+ /* deactivate a passive thermal instance */
+ if ((trip_type == THERMAL_TRIP_PASSIVE ||
+ trip_type == THERMAL_TRIPS_NONE) &&
+ cur_state == THERMAL_NO_TARGET)
+ tz->passive--;
+ instance->target = cur_state;
+ cdev->updated = false; /* cooling device needs update */
+ }
+ }
+
+ return;
+}
/**
* thermal_zone_device_update - force an update of a thermal zone's state
* @ttz: the thermal zone to update
int count, ret = 0;
long temp, trip_temp;
enum thermal_trip_type trip_type;
- struct thermal_cooling_device_instance *instance;
- struct thermal_cooling_device *cdev;
mutex_lock(&tz->lock);
goto leave;
}
+ tz->last_temperature = tz->temperature;
+ tz->temperature = temp;
+
for (count = 0; count < tz->trips; count++) {
tz->ops->get_trip_type(tz, count, &trip_type);
tz->ops->get_trip_temp(tz, count, &trip_temp);
tz->ops->notify(tz, count, trip_type);
break;
case THERMAL_TRIP_ACTIVE:
- list_for_each_entry(instance, &tz->cooling_devices,
- node) {
- if (instance->trip != count)
- continue;
-
- cdev = instance->cdev;
-
- if (temp >= trip_temp)
- cdev->ops->set_cur_state(cdev, 1);
- else
- cdev->ops->set_cur_state(cdev, 0);
- }
+ thermal_zone_trip_update(tz, count, temp);
break;
case THERMAL_TRIP_PASSIVE:
if (temp >= trip_temp || tz->passive)
- thermal_zone_device_passive(tz, temp,
- trip_temp, count);
+ thermal_zone_trip_update(tz, count, temp);
break;
}
}
if (tz->forced_passive)
- thermal_zone_device_passive(tz, temp, tz->forced_passive,
- THERMAL_TRIPS_NONE);
-
- tz->last_temperature = temp;
+ thermal_zone_trip_update(tz, THERMAL_TRIPS_NONE, temp);
+ thermal_zone_do_update(tz);
leave:
if (tz->passive)
* @mask: a bit string indicating the writeablility of trip points
* @devdata: private device data
* @ops: standard thermal zone device callbacks
- * @tc1: thermal coefficient 1 for passive calculations
- * @tc2: thermal coefficient 2 for passive calculations
* @passive_delay: number of milliseconds to wait between polls when
* performing passive cooling
* @polling_delay: number of milliseconds to wait between polls when checking
* driven systems)
*
* thermal_zone_device_unregister() must be called when the device is no
- * longer needed. The passive cooling formula uses tc1 and tc2 as described in
- * section 11.1.5.1 of the ACPI specification 3.0.
+ * longer needed. The passive cooling depends on the .get_trend() return value.
*/
struct thermal_zone_device *thermal_zone_device_register(const char *type,
int trips, int mask, void *devdata,
const struct thermal_zone_device_ops *ops,
- int tc1, int tc2, int passive_delay, int polling_delay)
+ int passive_delay, int polling_delay)
{
struct thermal_zone_device *tz;
struct thermal_cooling_device *pos;
int count;
int passive = 0;
- if (strlen(type) >= THERMAL_NAME_LENGTH)
+ if (type && strlen(type) >= THERMAL_NAME_LENGTH)
return ERR_PTR(-EINVAL);
if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips)
if (!tz)
return ERR_PTR(-ENOMEM);
- INIT_LIST_HEAD(&tz->cooling_devices);
+ INIT_LIST_HEAD(&tz->thermal_instances);
idr_init(&tz->idr);
mutex_init(&tz->lock);
result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id);
return ERR_PTR(result);
}
- strcpy(tz->type, type);
+ strcpy(tz->type, type ? : "");
tz->ops = ops;
tz->device.class = &thermal_class;
tz->devdata = devdata;
tz->trips = trips;
- tz->tc1 = tc1;
- tz->tc2 = tc2;
tz->passive_delay = passive_delay;
tz->polling_delay = polling_delay;
--- /dev/null
+/*
+ * linux/include/linux/cpu_cooling.h
+ *
+ * Copyright (C) 2012 Samsung Electronics Co., Ltd(http://www.samsung.com)
+ * Copyright (C) 2012 Amit Daniel <amit.kachhap@linaro.org>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * 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; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#ifndef __CPU_COOLING_H__
+#define __CPU_COOLING_H__
+
+#include <linux/thermal.h>
+
+#define CPUFREQ_COOLING_START 0
+#define CPUFREQ_COOLING_STOP 1
+
+#ifdef CONFIG_CPU_THERMAL
+/**
+ * cpufreq_cooling_register - function to create cpufreq cooling device.
+ * @clip_cpus: cpumask of cpus where the frequency constraints will happen
+ */
+struct thermal_cooling_device *cpufreq_cooling_register(
+ struct cpumask *clip_cpus);
+
+/**
+ * cpufreq_cooling_unregister - function to remove cpufreq cooling device.
+ * @cdev: thermal cooling device pointer.
+ */
+void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev);
+#else /* !CONFIG_CPU_THERMAL */
+static inline struct thermal_cooling_device *cpufreq_cooling_register(
+ struct cpumask *clip_cpus)
+{
+ return NULL;
+}
+static inline void cpufreq_cooling_unregister(
+ struct thermal_cooling_device *cdev)
+{
+ return;
+}
+#endif /* CONFIG_CPU_THERMAL */
+
+#endif /* __CPU_COOLING_H__ */
+++ /dev/null
-/*
- * exynos4_tmu.h - Samsung EXYNOS4 TMU (Thermal Management Unit)
- *
- * Copyright (C) 2011 Samsung Electronics
- * Donggeun Kim <dg77.kim@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#ifndef _LINUX_EXYNOS4_TMU_H
-#define _LINUX_EXYNOS4_TMU_H
-
-enum calibration_type {
- TYPE_ONE_POINT_TRIMMING,
- TYPE_TWO_POINT_TRIMMING,
- TYPE_NONE,
-};
-
-/**
- * struct exynos4_tmu_platform_data
- * @threshold: basic temperature for generating interrupt
- * 25 <= threshold <= 125 [unit: degree Celsius]
- * @trigger_levels: array for each interrupt levels
- * [unit: degree Celsius]
- * 0: temperature for trigger_level0 interrupt
- * condition for trigger_level0 interrupt:
- * current temperature > threshold + trigger_levels[0]
- * 1: temperature for trigger_level1 interrupt
- * condition for trigger_level1 interrupt:
- * current temperature > threshold + trigger_levels[1]
- * 2: temperature for trigger_level2 interrupt
- * condition for trigger_level2 interrupt:
- * current temperature > threshold + trigger_levels[2]
- * 3: temperature for trigger_level3 interrupt
- * condition for trigger_level3 interrupt:
- * current temperature > threshold + trigger_levels[3]
- * @trigger_level0_en:
- * 1 = enable trigger_level0 interrupt,
- * 0 = disable trigger_level0 interrupt
- * @trigger_level1_en:
- * 1 = enable trigger_level1 interrupt,
- * 0 = disable trigger_level1 interrupt
- * @trigger_level2_en:
- * 1 = enable trigger_level2 interrupt,
- * 0 = disable trigger_level2 interrupt
- * @trigger_level3_en:
- * 1 = enable trigger_level3 interrupt,
- * 0 = disable trigger_level3 interrupt
- * @gain: gain of amplifier in the positive-TC generator block
- * 0 <= gain <= 15
- * @reference_voltage: reference voltage of amplifier
- * in the positive-TC generator block
- * 0 <= reference_voltage <= 31
- * @cal_type: calibration type for temperature
- *
- * This structure is required for configuration of exynos4_tmu driver.
- */
-struct exynos4_tmu_platform_data {
- u8 threshold;
- u8 trigger_levels[4];
- bool trigger_level0_en;
- bool trigger_level1_en;
- bool trigger_level2_en;
- bool trigger_level3_en;
-
- u8 gain;
- u8 reference_voltage;
-
- enum calibration_type cal_type;
-};
-#endif /* _LINUX_EXYNOS4_TMU_H */
--- /dev/null
+/*
+ * exynos_thermal.h - Samsung EXYNOS TMU (Thermal Management Unit)
+ *
+ * Copyright (C) 2011 Samsung Electronics
+ * Donggeun Kim <dg77.kim@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _LINUX_EXYNOS_THERMAL_H
+#define _LINUX_EXYNOS_THERMAL_H
+#include <linux/cpu_cooling.h>
+
+enum calibration_type {
+ TYPE_ONE_POINT_TRIMMING,
+ TYPE_TWO_POINT_TRIMMING,
+ TYPE_NONE,
+};
+
+enum soc_type {
+ SOC_ARCH_EXYNOS4210 = 1,
+ SOC_ARCH_EXYNOS,
+};
+/**
+ * struct freq_clip_table
+ * @freq_clip_max: maximum frequency allowed for this cooling state.
+ * @temp_level: Temperature level at which the temperature clipping will
+ * happen.
+ * @mask_val: cpumask of the allowed cpu's where the clipping will take place.
+ *
+ * This structure is required to be filled and passed to the
+ * cpufreq_cooling_unregister function.
+ */
+struct freq_clip_table {
+ unsigned int freq_clip_max;
+ unsigned int temp_level;
+ const struct cpumask *mask_val;
+};
+
+/**
+ * struct exynos_tmu_platform_data
+ * @threshold: basic temperature for generating interrupt
+ * 25 <= threshold <= 125 [unit: degree Celsius]
+ * @trigger_levels: array for each interrupt levels
+ * [unit: degree Celsius]
+ * 0: temperature for trigger_level0 interrupt
+ * condition for trigger_level0 interrupt:
+ * current temperature > threshold + trigger_levels[0]
+ * 1: temperature for trigger_level1 interrupt
+ * condition for trigger_level1 interrupt:
+ * current temperature > threshold + trigger_levels[1]
+ * 2: temperature for trigger_level2 interrupt
+ * condition for trigger_level2 interrupt:
+ * current temperature > threshold + trigger_levels[2]
+ * 3: temperature for trigger_level3 interrupt
+ * condition for trigger_level3 interrupt:
+ * current temperature > threshold + trigger_levels[3]
+ * @trigger_level0_en:
+ * 1 = enable trigger_level0 interrupt,
+ * 0 = disable trigger_level0 interrupt
+ * @trigger_level1_en:
+ * 1 = enable trigger_level1 interrupt,
+ * 0 = disable trigger_level1 interrupt
+ * @trigger_level2_en:
+ * 1 = enable trigger_level2 interrupt,
+ * 0 = disable trigger_level2 interrupt
+ * @trigger_level3_en:
+ * 1 = enable trigger_level3 interrupt,
+ * 0 = disable trigger_level3 interrupt
+ * @gain: gain of amplifier in the positive-TC generator block
+ * 0 <= gain <= 15
+ * @reference_voltage: reference voltage of amplifier
+ * in the positive-TC generator block
+ * 0 <= reference_voltage <= 31
+ * @noise_cancel_mode: noise cancellation mode
+ * 000, 100, 101, 110 and 111 can be different modes
+ * @type: determines the type of SOC
+ * @efuse_value: platform defined fuse value
+ * @cal_type: calibration type for temperature
+ * @freq_clip_table: Table representing frequency reduction percentage.
+ * @freq_tab_count: Count of the above table as frequency reduction may
+ * applicable to only some of the trigger levels.
+ *
+ * This structure is required for configuration of exynos_tmu driver.
+ */
+struct exynos_tmu_platform_data {
+ u8 threshold;
+ u8 trigger_levels[4];
+ bool trigger_level0_en;
+ bool trigger_level1_en;
+ bool trigger_level2_en;
+ bool trigger_level3_en;
+
+ u8 gain;
+ u8 reference_voltage;
+ u8 noise_cancel_mode;
+ u32 efuse_value;
+
+ enum calibration_type cal_type;
+ enum soc_type type;
+ struct freq_clip_table freq_tab[4];
+ unsigned int freq_tab_count;
+};
+#endif /* _LINUX_EXYNOS_THERMAL_H */
THERMAL_TRIP_CRITICAL,
};
+enum thermal_trend {
+ THERMAL_TREND_STABLE, /* temperature is stable */
+ THERMAL_TREND_RAISING, /* temperature is raising */
+ THERMAL_TREND_DROPPING, /* temperature is dropping */
+};
+
struct thermal_zone_device_ops {
int (*bind) (struct thermal_zone_device *,
struct thermal_cooling_device *);
int (*set_trip_hyst) (struct thermal_zone_device *, int,
unsigned long);
int (*get_crit_temp) (struct thermal_zone_device *, unsigned long *);
+ int (*get_trend) (struct thermal_zone_device *, int,
+ enum thermal_trend *);
int (*notify) (struct thermal_zone_device *, int,
enum thermal_trip_type);
};
int (*set_cur_state) (struct thermal_cooling_device *, unsigned long);
};
+#define THERMAL_NO_LIMIT -1UL /* no upper/lower limit requirement */
+
#define THERMAL_TRIPS_NONE -1
#define THERMAL_MAX_TRIPS 12
#define THERMAL_NAME_LENGTH 20
struct device device;
void *devdata;
const struct thermal_cooling_device_ops *ops;
+ bool updated; /* true if the cooling device does not need update */
+ struct mutex lock; /* protect thermal_instances list */
+ struct list_head thermal_instances;
struct list_head node;
};
struct thermal_attr *trip_hyst_attrs;
void *devdata;
int trips;
- int tc1;
- int tc2;
int passive_delay;
int polling_delay;
+ int temperature;
int last_temperature;
- bool passive;
+ int passive;
unsigned int forced_passive;
const struct thermal_zone_device_ops *ops;
- struct list_head cooling_devices;
+ struct list_head thermal_instances;
struct idr idr;
- struct mutex lock; /* protect cooling devices list */
+ struct mutex lock; /* protect thermal_instances list */
struct list_head node;
struct delayed_work poll_queue;
};
#define THERMAL_GENL_CMD_MAX (__THERMAL_GENL_CMD_MAX - 1)
struct thermal_zone_device *thermal_zone_device_register(const char *, int, int,
- void *, const struct thermal_zone_device_ops *, int tc1,
- int tc2, int passive_freq, int polling_freq);
+ void *, const struct thermal_zone_device_ops *, int, int);
void thermal_zone_device_unregister(struct thermal_zone_device *);
int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int,
- struct thermal_cooling_device *);
+ struct thermal_cooling_device *,
+ unsigned long, unsigned long);
int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
struct thermal_cooling_device *);
void thermal_zone_device_update(struct thermal_zone_device *);
#include <unistd.h>
#include <getopt.h>
-#include <sys/types.h>
#include <dirent.h>
#include <acpi/acconfig.h>
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