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Merge branches 'fixes-for-37', 'ec' and 'thermal' into release

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Len Brown 2012-10-09 01:47:35 -04:00
commit d1d4a81b84
22 changed files with 2202 additions and 733 deletions
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32
Documentation/thermal/cpu-cooling-api.txt Normal file
View File

@ -0,0 +1,32 @@
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.

35
Documentation/hwmon/exynos4_tmu → Documentation/thermal/exynos_thermal
View File

@ -46,36 +46,7 @@ The threshold levels are defined as follows:
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.
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 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
it can be used to synchronize the cooling action.

9
Documentation/thermal/sysfs-api.txt
View File

@ -84,7 +84,8 @@ temperature) and throttle appropriate devices.
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.
@ -93,6 +94,12 @@ temperature) and throttle appropriate devices.
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);

30
drivers/acpi/ec.c
View File

@ -71,9 +71,6 @@ enum ec_command {
#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 */
@ -87,6 +84,15 @@ static unsigned int ec_delay __read_mostly = ACPI_EC_DELAY;
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);
@ -319,7 +325,7 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)
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);
@ -924,6 +930,17 @@ static int ec_flag_msi(const struct dmi_system_id *id)
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", {
@ -955,10 +972,13 @@ static struct dmi_system_id __initdata ec_dmi_table[] = {
{
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;

93
drivers/acpi/thermal.c
View File

@ -708,6 +708,40 @@ static int thermal_get_crit_temp(struct thermal_zone_device *thermal,
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)
{
@ -731,11 +765,9 @@ static int thermal_notify(struct thermal_zone_device *thermal, int trip,
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;
@ -759,11 +791,19 @@ static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
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;
}
}
@ -776,11 +816,17 @@ static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
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;
}
}
@ -788,7 +834,14 @@ static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal,
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;
}
@ -802,16 +855,14 @@ static int
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 = {
@ -823,6 +874,7 @@ 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,
};
@ -849,15 +901,12 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
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;

10
drivers/hwmon/Kconfig
View File

@ -334,16 +334,6 @@ config SENSORS_DA9052_ADC
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

1
drivers/hwmon/Makefile
View File

@ -50,7 +50,6 @@ obj-$(CONFIG_SENSORS_DS1621) += ds1621.o
obj-$(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

518
drivers/hwmon/exynos4_tmu.c
View File

@ -1,518 +0,0 @@
/*
* 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");

5
drivers/platform/x86/acerhdf.c
View File

@ -329,7 +329,8 @@ static int acerhdf_bind(struct thermal_zone_device *thermal,
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;
}
@ -661,7 +662,7 @@ static int acerhdf_register_thermal(void)
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;

2
drivers/platform/x86/intel_mid_thermal.c
View File

@ -502,7 +502,7 @@ static int mid_thermal_probe(struct platform_device *pdev)
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]);

2
drivers/power/power_supply_core.c
View File

@ -201,7 +201,7 @@ static int psy_register_thermal(struct power_supply *psy)
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;

5
drivers/staging/omap-thermal/omap-thermal-common.c
View File

@ -126,7 +126,9 @@ static int omap_thermal_bind(struct thermal_zone_device *thermal,
/* 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 */
@ -268,7 +270,6 @@ int omap_thermal_expose_sensor(struct omap_bandgap *bg_ptr, int id,
/* 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)) {

26
drivers/thermal/Kconfig
View File

@ -19,6 +19,17 @@ config THERMAL_HWMON
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
@ -27,3 +38,18 @@ config SPEAR_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.

5
drivers/thermal/Makefile
View File

@ -3,4 +3,7 @@
#
obj-$(CONFIG_THERMAL) += thermal_sys.o
obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o
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

449
drivers/thermal/cpu_cooling.c Normal file
View File

@ -0,0 +1,449 @@
/*
* 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, &notify_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);

997
drivers/thermal/exynos_thermal.c Normal file
View File

@ -0,0 +1,997 @@
/*
* 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");

260
drivers/thermal/rcar_thermal.c Normal file
View File

@ -0,0 +1,260 @@
/*
* 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>");

2
drivers/thermal/spear_thermal.c
View File

@ -147,7 +147,7 @@ static int spear_thermal_probe(struct platform_device *pdev)
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);

321
drivers/thermal/thermal_sys.c
View File

@ -41,15 +41,25 @@ MODULE_AUTHOR("Zhang Rui");
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);
@ -308,8 +318,9 @@ passive_store(struct device *dev, struct device_attribute *attr,
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)
@ -327,9 +338,6 @@ passive_store(struct device *dev, struct device_attribute *attr,
tz->passive_delay = 0;
}
tz->tc1 = 1;
tz->tc2 = 1;
tz->forced_passive = state;
thermal_zone_device_update(tz);
@ -425,10 +433,10 @@ static ssize_t
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");
@ -590,7 +598,7 @@ thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
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;
@ -603,7 +611,8 @@ thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
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;
@ -704,74 +713,6 @@ static void thermal_zone_device_set_polling(struct thermal_zone_device *tz,
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
@ -791,12 +732,14 @@ static void thermal_zone_device_check(struct work_struct *work)
*/
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))
@ -814,13 +757,26 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
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;
@ -841,13 +797,17 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
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)
@ -877,16 +837,20 @@ int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz,
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;
@ -934,7 +898,7 @@ thermal_cooling_device_register(char *type, void *devdata,
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 ||
@ -951,8 +915,11 @@ thermal_cooling_device_register(char *type, void *devdata,
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);
@ -1044,6 +1011,136 @@ void thermal_cooling_device_unregister(struct
}
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
@ -1054,8 +1151,6 @@ void thermal_zone_device_update(struct thermal_zone_device *tz)
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);
@ -1065,6 +1160,9 @@ void thermal_zone_device_update(struct thermal_zone_device *tz)
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);
@ -1088,32 +1186,18 @@ void thermal_zone_device_update(struct thermal_zone_device *tz)
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)
@ -1236,8 +1320,6 @@ static void remove_trip_attrs(struct thermal_zone_device *tz)
* @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
@ -1245,13 +1327,12 @@ static void remove_trip_attrs(struct thermal_zone_device *tz)
* 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;
@ -1260,7 +1341,7 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
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)
@ -1273,7 +1354,7 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
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);
@ -1282,13 +1363,11 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
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;

58
include/linux/cpu_cooling.h Normal file
View File

@ -0,0 +1,58 @@
/*
* 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__ */

47
include/linux/platform_data/exynos4_tmu.h → include/linux/platform_data/exynos_thermal.h
View File

@ -1,5 +1,5 @@
/*
* exynos4_tmu.h - Samsung EXYNOS4 TMU (Thermal Management Unit)
* exynos_thermal.h - Samsung EXYNOS TMU (Thermal Management Unit)
*
* Copyright (C) 2011 Samsung Electronics
* Donggeun Kim <dg77.kim@samsung.com>
@ -19,8 +19,9 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _LINUX_EXYNOS4_TMU_H
#define _LINUX_EXYNOS4_TMU_H
#ifndef _LINUX_EXYNOS_THERMAL_H
#define _LINUX_EXYNOS_THERMAL_H
#include <linux/cpu_cooling.h>
enum calibration_type {
TYPE_ONE_POINT_TRIMMING,
@ -28,8 +29,28 @@ enum calibration_type {
TYPE_NONE,
};
enum soc_type {
SOC_ARCH_EXYNOS4210 = 1,
SOC_ARCH_EXYNOS,
};
/**
* struct exynos4_tmu_platform_data
* 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
@ -63,11 +84,18 @@ enum calibration_type {
* @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 exynos4_tmu driver.
* This structure is required for configuration of exynos_tmu driver.
*/
struct exynos4_tmu_platform_data {
struct exynos_tmu_platform_data {
u8 threshold;
u8 trigger_levels[4];
bool trigger_level0_en;
@ -77,7 +105,12 @@ struct exynos4_tmu_platform_data {
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_EXYNOS4_TMU_H */
#endif /* _LINUX_EXYNOS_THERMAL_H */

28
include/linux/thermal.h
View File

@ -44,6 +44,12 @@ enum thermal_trip_type {
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 *);
@ -65,6 +71,8 @@ struct thermal_zone_device_ops {
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);
};
@ -75,6 +83,8 @@ struct thermal_cooling_device_ops {
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
@ -84,6 +94,9 @@ struct thermal_cooling_device {
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;
};
@ -105,17 +118,16 @@ struct thermal_zone_device {
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;
};
@ -152,12 +164,12 @@ enum {
#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 *);