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|
/*
* Copyright (C) ST-Ericsson SA 2010
* Author: Martin Persson <martin.persson@stericsson.com> for
* ST-Ericsson.
* License terms: GNU Gereral Public License (GPL) version 2
*
* Note:
*
* ABX500 does not provide auto ADC, so to monitor the required
* temperatures, a periodic work is used. It is more important
* to not wake up the CPU than to perform this job, hence the use
* of a deferred delay.
*
* A deferred delay for thermal monitor is considered safe because:
* If the chip gets too hot during a sleep state it's most likely
* due to external factors, such as the surrounding temperature.
* I.e. no SW decisions will make any difference.
*
* If/when the ABX500 thermal warning temperature is reached (threshold
* cannot be changed by SW), an interrupt is set and the driver
* notifies user space via a sysfs event.
*
* If/when ABX500 thermal shutdown temperature is reached a hardware
* shutdown of the ABX500 will occur.
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/hwmon.h>
#include <linux/sysfs.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <linux/jiffies.h>
#include <linux/mutex.h>
#include <linux/pm.h>
#include <asm/mach-types.h>
#include "abx500.h"
#define DEFAULT_MONITOR_DELAY 1000
/*
* Thresholds are considered inactive if set to 0.
* To avoid confusion for user space applications,
* the temp monitor delay is set to 0 if all thresholds
* are 0.
*/
static bool find_active_thresholds(struct abx500_temp *data)
{
int i;
for (i = 0; i < data->monitored_sensors; i++)
if (data->max[i] != 0 || data->max_hyst[i] != 0
|| data->min[i] != 0)
return true;
dev_dbg(&data->pdev->dev, "No active thresholds,"
"cancel deferred job (if it exists)"
"and reset temp monitor delay\n");
cancel_delayed_work_sync(&data->work);
return false;
}
static inline void schedule_monitor(struct abx500_temp *data)
{
unsigned long delay_in_jiffies;
delay_in_jiffies = msecs_to_jiffies(data->gpadc_monitor_delay);
schedule_delayed_work(&data->work, delay_in_jiffies);
}
static inline void gpadc_monitor_exit(struct abx500_temp *data)
{
cancel_delayed_work_sync(&data->work);
}
static void gpadc_monitor(struct work_struct *work)
{
unsigned long delay_in_jiffies;
int val, i, ret;
/* Container for alarm node name */
char alarm_node[30];
bool updated_min_alarm = false;
bool updated_max_alarm = false;
bool updated_max_hyst_alarm = false;
struct abx500_temp *data = container_of(work, struct abx500_temp,
work.work);
for (i = 0; i < data->monitored_sensors; i++) {
/* Thresholds are considered inactive if set to 0 */
if (data->max[i] == 0 && data->max_hyst[i] == 0
&& data->min[i] == 0)
continue;
val = data->ops.read_sensor(data, data->gpadc_addr[i]);
if (val < 0) {
dev_err(&data->pdev->dev, "GPADC read failed\n");
continue;
}
mutex_lock(&data->lock);
if (data->min[i] != 0) {
if (val < data->min[i]) {
if (data->min_alarm[i] == 0) {
data->min_alarm[i] = 1;
updated_min_alarm = true;
}
} else {
if (data->min_alarm[i] == 1) {
data->min_alarm[i] = 0;
updated_min_alarm = true;
}
}
}
if (data->max[i] != 0) {
if (val > data->max[i]) {
if (data->max_alarm[i] == 0) {
data->max_alarm[i] = 1;
updated_max_alarm = true;
}
} else {
if (data->max_alarm[i] == 1) {
data->max_alarm[i] = 0;
updated_max_alarm = true;
}
}
}
if (data->max_hyst[i] != 0) {
if (val > data->max_hyst[i]) {
if (data->max_hyst_alarm[i] == 0) {
data->max_hyst_alarm[i] = 1;
updated_max_hyst_alarm = true;
}
} else {
if (data->max_hyst_alarm[i] == 1) {
data->max_hyst_alarm[i] = 0;
updated_max_hyst_alarm = true;
}
}
}
mutex_unlock(&data->lock);
/* hwmon attr index starts at 1, thus "i+1" below */
if (updated_min_alarm) {
ret = snprintf(alarm_node, 16, "temp%d_min_alarm",
(i + 1));
if (ret < 0) {
dev_err(&data->pdev->dev,
"Unable to update alarm node (%d)",
ret);
break;
}
sysfs_notify(&data->pdev->dev.kobj, NULL, alarm_node);
}
if (updated_max_alarm) {
ret = snprintf(alarm_node, 16, "temp%d_max_alarm",
(i + 1));
if (ret < 0) {
dev_err(&data->pdev->dev,
"Unable to update alarm node (%d)",
ret);
break;
}
hwmon_notify(data->max_alarm[i], NULL);
sysfs_notify(&data->pdev->dev.kobj, NULL, alarm_node);
}
if (updated_max_hyst_alarm) {
ret = snprintf(alarm_node, 21, "temp%d_max_hyst_alarm",
(i + 1));
if (ret < 0) {
dev_err(&data->pdev->dev,
"Unable to update alarm node (%d)",
ret);
break;
}
sysfs_notify(&data->pdev->dev.kobj, NULL, alarm_node);
}
}
delay_in_jiffies = msecs_to_jiffies(data->gpadc_monitor_delay);
schedule_delayed_work(&data->work, delay_in_jiffies);
}
static ssize_t set_temp_monitor_delay(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
int res;
unsigned long delay_in_s;
struct abx500_temp *data = dev_get_drvdata(dev);
res = strict_strtoul(buf, 10, &delay_in_s);
if (res < 0)
return res;
mutex_lock(&data->lock);
data->gpadc_monitor_delay = delay_in_s * 1000;
if (find_active_thresholds(data))
schedule_monitor(data);
mutex_unlock(&data->lock);
return count;
}
static ssize_t set_temp_power_off_delay(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
int res;
unsigned long delay_in_s;
struct abx500_temp *data = dev_get_drvdata(dev);
res = strict_strtoul(buf, 10, &delay_in_s);
if (res < 0)
return res;
mutex_lock(&data->lock);
data->power_off_delay = delay_in_s * 1000;
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_temp_monitor_delay(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct abx500_temp *data = dev_get_drvdata(dev);
/* return time in s, not ms */
return sprintf(buf, "%lu\n", (data->gpadc_monitor_delay) / 1000);
}
static ssize_t show_temp_power_off_delay(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct abx500_temp *data = dev_get_drvdata(dev);
/* return time in s, not ms */
return sprintf(buf, "%lu\n", (data->power_off_delay) / 1000);
}
/* HWMON sysfs interface */
static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
char *buf)
{
/*
* To avoid confusion between sensor label and chip name, the function
* "show_label" is not used to return the chip name.
*/
struct abx500_temp *data = dev_get_drvdata(dev);
return data->ops.show_name(dev, devattr, buf);
}
static ssize_t show_label(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct abx500_temp *data = dev_get_drvdata(dev);
return data->ops.show_label(dev, devattr, buf);
}
static ssize_t show_input(struct device *dev,
struct device_attribute *devattr, char *buf)
{
int val;
struct abx500_temp *data = dev_get_drvdata(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
/* hwmon attr index starts at 1, thus "attr->index-1" below */
u8 gpadc_addr = data->gpadc_addr[attr->index - 1];
val = data->ops.read_sensor(data, gpadc_addr);
if (val < 0)
dev_err(&data->pdev->dev, "GPADC read failed\n");
return sprintf(buf, "%d\n", val);
}
/* set functions (RW nodes) */
static ssize_t set_min(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
unsigned long val;
struct abx500_temp *data = dev_get_drvdata(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
int res = strict_strtoul(buf, 10, &val);
if (res < 0)
return res;
mutex_lock(&data->lock);
/*
* Threshold is considered inactive if set to 0
* hwmon attr index starts at 1, thus "attr->index-1" below
*/
if (val == 0)
data->min_alarm[attr->index - 1] = 0;
data->min[attr->index - 1] = val;
if (val == 0)
(void) find_active_thresholds(data);
else
schedule_monitor(data);
mutex_unlock(&data->lock);
return count;
}
static ssize_t set_max(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
unsigned long val;
struct abx500_temp *data = dev_get_drvdata(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
int res = strict_strtoul(buf, 10, &val);
if (res < 0)
return res;
mutex_lock(&data->lock);
/*
* Threshold is considered inactive if set to 0
* hwmon attr index starts at 1, thus "attr->index-1" below
*/
if (val == 0)
data->max_alarm[attr->index - 1] = 0;
data->max[attr->index - 1] = val;
if (val == 0)
(void) find_active_thresholds(data);
else
schedule_monitor(data);
mutex_unlock(&data->lock);
return count;
}
static ssize_t set_max_hyst(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
unsigned long val;
struct abx500_temp *data = dev_get_drvdata(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
int res = strict_strtoul(buf, 10, &val);
if (res < 0)
return res;
mutex_lock(&data->lock);
/*
* Threshold is considered inactive if set to 0
* hwmon attr index starts at 1, thus "attr->index-1" below
*/
if (val == 0)
data->max_hyst_alarm[attr->index - 1] = 0;
data->max_hyst[attr->index - 1] = val;
if (val == 0)
(void) find_active_thresholds(data);
else
schedule_monitor(data);
mutex_unlock(&data->lock);
return count;
}
/*
* show functions (RO nodes)
*/
static ssize_t show_min(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct abx500_temp *data = dev_get_drvdata(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
/* hwmon attr index starts at 1, thus "attr->index-1" below */
return sprintf(buf, "%ld\n", data->min[attr->index - 1]);
}
static ssize_t show_max(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct abx500_temp *data = dev_get_drvdata(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
/* hwmon attr index starts at 1, thus "attr->index-1" below */
return sprintf(buf, "%ld\n", data->max[attr->index - 1]);
}
static ssize_t show_max_hyst(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct abx500_temp *data = dev_get_drvdata(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
/* hwmon attr index starts at 1, thus "attr->index-1" below */
return sprintf(buf, "%ld\n", data->max_hyst[attr->index - 1]);
}
/* Alarms */
static ssize_t show_min_alarm(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct abx500_temp *data = dev_get_drvdata(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
/* hwmon attr index starts at 1, thus "attr->index-1" below */
return sprintf(buf, "%ld\n", data->min_alarm[attr->index - 1]);
}
static ssize_t show_max_alarm(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct abx500_temp *data = dev_get_drvdata(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
/* hwmon attr index starts at 1, thus "attr->index-1" below */
return sprintf(buf, "%ld\n", data->max_alarm[attr->index - 1]);
}
static ssize_t show_max_hyst_alarm(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct abx500_temp *data = dev_get_drvdata(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
/* hwmon attr index starts at 1, thus "attr->index-1" below */
return sprintf(buf, "%ld\n", data->max_hyst_alarm[attr->index - 1]);
}
static ssize_t show_crit_alarm(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct abx500_temp *data = dev_get_drvdata(dev);
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
/* hwmon attr index starts at 1, thus "attr->index-1" below */
return sprintf(buf, "%ld\n", data->crit_alarm[attr->index - 1]);
}
static mode_t abx500_attrs_visible(struct kobject *kobj,
struct attribute *a, int n)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct abx500_temp *data = dev_get_drvdata(dev);
return data->ops.is_visible(a, n);
}
static SENSOR_DEVICE_ATTR(temp_monitor_delay, S_IRUGO | S_IWUSR,
show_temp_monitor_delay, set_temp_monitor_delay, 0);
static SENSOR_DEVICE_ATTR(temp_power_off_delay, S_IRUGO | S_IWUSR,
show_temp_power_off_delay,
set_temp_power_off_delay, 0);
/* Chip name, required by hwmon*/
static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
/* GPADC - SENSOR1 */
static SENSOR_DEVICE_ATTR(temp1_label, S_IRUGO, show_label, NULL, 1);
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_input, NULL, 1);
static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_min, set_min, 1);
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_max, set_max, 1);
static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
show_max_hyst, set_max_hyst, 1);
static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_min_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_max_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(temp1_max_hyst_alarm, S_IRUGO,
show_max_hyst_alarm, NULL, 1);
/* GPADC - SENSOR2 */
static SENSOR_DEVICE_ATTR(temp2_label, S_IRUGO, show_label, NULL, 2);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_input, NULL, 2);
static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_min, set_min, 2);
static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_max, set_max, 2);
static SENSOR_DEVICE_ATTR(temp2_max_hyst, S_IWUSR | S_IRUGO,
show_max_hyst, set_max_hyst, 2);
static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_min_alarm, NULL, 2);
static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_max_alarm, NULL, 2);
static SENSOR_DEVICE_ATTR(temp2_max_hyst_alarm, S_IRUGO,
show_max_hyst_alarm, NULL, 2);
/* GPADC - SENSOR3 */
static SENSOR_DEVICE_ATTR(temp3_label, S_IRUGO, show_label, NULL, 3);
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_input, NULL, 3);
static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_min, set_min, 3);
static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_max, set_max, 3);
static SENSOR_DEVICE_ATTR(temp3_max_hyst, S_IWUSR | S_IRUGO,
show_max_hyst, set_max_hyst, 3);
static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_min_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_max_alarm, NULL, 3);
static SENSOR_DEVICE_ATTR(temp3_max_hyst_alarm, S_IRUGO,
show_max_hyst_alarm, NULL, 3);
/* GPADC - SENSOR4 */
static SENSOR_DEVICE_ATTR(temp4_label, S_IRUGO, show_label, NULL, 4);
static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_input, NULL, 4);
static SENSOR_DEVICE_ATTR(temp4_min, S_IWUSR | S_IRUGO, show_min, set_min, 4);
static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_max, set_max, 4);
static SENSOR_DEVICE_ATTR(temp4_max_hyst, S_IWUSR | S_IRUGO,
show_max_hyst, set_max_hyst, 4);
static SENSOR_DEVICE_ATTR(temp4_min_alarm, S_IRUGO, show_min_alarm, NULL, 4);
static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, show_max_alarm, NULL, 4);
static SENSOR_DEVICE_ATTR(temp4_max_hyst_alarm, S_IRUGO,
show_max_hyst_alarm, NULL, 4);
/* GPADC - SENSOR5 */
static SENSOR_DEVICE_ATTR(temp5_label, S_IRUGO, show_label, NULL, 5);
static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_input, NULL, 5);
static SENSOR_DEVICE_ATTR(temp5_min, S_IWUSR | S_IRUGO, show_min, set_min, 5);
static SENSOR_DEVICE_ATTR(temp5_max, S_IWUSR | S_IRUGO, show_max, set_max, 5);
static SENSOR_DEVICE_ATTR(temp5_max_hyst, S_IWUSR | S_IRUGO,
show_max_hyst, set_max_hyst, 5);
static SENSOR_DEVICE_ATTR(temp5_min_alarm, S_IRUGO, show_min_alarm, NULL, 5);
static SENSOR_DEVICE_ATTR(temp5_max_alarm, S_IRUGO, show_max_alarm, NULL, 5);
static SENSOR_DEVICE_ATTR(temp5_max_hyst_alarm, S_IRUGO,
show_max_hyst_alarm, NULL, 5);
static SENSOR_DEVICE_ATTR(temp5_crit_alarm, S_IRUGO,
show_crit_alarm, NULL, 5);
struct attribute *abx500_temp_attributes[] = {
&sensor_dev_attr_name.dev_attr.attr,
&sensor_dev_attr_temp_monitor_delay.dev_attr.attr,
&sensor_dev_attr_temp_power_off_delay.dev_attr.attr,
/* GPADC SENSOR1 */
&sensor_dev_attr_temp1_label.dev_attr.attr,
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_min.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
&sensor_dev_attr_temp1_max_hyst_alarm.dev_attr.attr,
/* GPADC SENSOR2 */
&sensor_dev_attr_temp2_label.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp2_min.dev_attr.attr,
&sensor_dev_attr_temp2_max.dev_attr.attr,
&sensor_dev_attr_temp2_max_hyst.dev_attr.attr,
&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_max_hyst_alarm.dev_attr.attr,
/* GPADC SENSOR3 */
&sensor_dev_attr_temp3_label.dev_attr.attr,
&sensor_dev_attr_temp3_input.dev_attr.attr,
&sensor_dev_attr_temp3_min.dev_attr.attr,
&sensor_dev_attr_temp3_max.dev_attr.attr,
&sensor_dev_attr_temp3_max_hyst.dev_attr.attr,
&sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
&sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
&sensor_dev_attr_temp3_max_hyst_alarm.dev_attr.attr,
/* GPADC SENSOR4 */
&sensor_dev_attr_temp4_label.dev_attr.attr,
&sensor_dev_attr_temp4_input.dev_attr.attr,
&sensor_dev_attr_temp4_min.dev_attr.attr,
&sensor_dev_attr_temp4_max.dev_attr.attr,
&sensor_dev_attr_temp4_max_hyst.dev_attr.attr,
&sensor_dev_attr_temp4_min_alarm.dev_attr.attr,
&sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
&sensor_dev_attr_temp4_max_hyst_alarm.dev_attr.attr,
/* GPADC SENSOR5*/
&sensor_dev_attr_temp5_label.dev_attr.attr,
&sensor_dev_attr_temp5_input.dev_attr.attr,
&sensor_dev_attr_temp5_min.dev_attr.attr,
&sensor_dev_attr_temp5_max.dev_attr.attr,
&sensor_dev_attr_temp5_max_hyst.dev_attr.attr,
&sensor_dev_attr_temp5_min_alarm.dev_attr.attr,
&sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
&sensor_dev_attr_temp5_max_hyst_alarm.dev_attr.attr,
&sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
NULL
};
static const struct attribute_group abx500_temp_group = {
.attrs = abx500_temp_attributes,
.is_visible = abx500_attrs_visible,
};
static irqreturn_t abx500_temp_irq_handler(int irq, void *irq_data)
{
struct platform_device *pdev = irq_data;
struct abx500_temp *data = platform_get_drvdata(pdev);
data->ops.irq_handler(irq, data);
return IRQ_HANDLED;
}
static int setup_irqs(struct platform_device *pdev)
{
int ret;
int irq = platform_get_irq_byname(pdev, "ABX500_TEMP_WARM");
if (irq < 0)
dev_err(&pdev->dev, "Get irq by name failed\n");
ret = request_threaded_irq(irq, NULL, abx500_temp_irq_handler,
IRQF_NO_SUSPEND, "abx500-temp", pdev);
if (ret < 0)
dev_err(&pdev->dev, "Request threaded irq failed (%d)\n", ret);
return ret;
}
static int __devinit abx500_temp_probe(struct platform_device *pdev)
{
struct abx500_temp *data;
int err;
data = kzalloc(sizeof(struct abx500_temp), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->pdev = pdev;
mutex_init(&data->lock);
/* Chip specific initialization */
if (!machine_is_u5500())
err = ab8500_hwmon_init(data);
else
err = ab5500_hwmon_init(data);
if (err < 0) {
dev_err(&pdev->dev, "abx500 init failed");
goto exit;
}
data->hwmon_dev = hwmon_device_register(&pdev->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
dev_err(&pdev->dev, "Class registration failed (%d)\n", err);
goto exit;
}
INIT_DELAYED_WORK_DEFERRABLE(&data->work, gpadc_monitor);
data->gpadc_monitor_delay = DEFAULT_MONITOR_DELAY;
platform_set_drvdata(pdev, data);
err = sysfs_create_group(&pdev->dev.kobj, &abx500_temp_group);
if (err < 0) {
dev_err(&pdev->dev, "Create sysfs group failed (%d)\n", err);
goto exit_platform_data;
}
err = setup_irqs(pdev);
if (err < 0) {
dev_err(&pdev->dev, "irq setup failed (%d)\n", err);
goto exit_sysfs_group;
}
return 0;
exit_sysfs_group:
sysfs_remove_group(&pdev->dev.kobj, &abx500_temp_group);
exit_platform_data:
hwmon_device_unregister(data->hwmon_dev);
platform_set_drvdata(pdev, NULL);
exit:
kfree(data->gpadc_auto);
kfree(data);
return err;
}
static int __devexit abx500_temp_remove(struct platform_device *pdev)
{
struct abx500_temp *data = platform_get_drvdata(pdev);
gpadc_monitor_exit(data);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&pdev->dev.kobj, &abx500_temp_group);
platform_set_drvdata(pdev, NULL);
kfree(data->gpadc_auto);
kfree(data);
return 0;
}
/* No action required in suspend/resume, thus the lack of functions */
static struct platform_driver abx500_temp_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "abx500-temp",
},
.probe = abx500_temp_probe,
.remove = __devexit_p(abx500_temp_remove),
};
static int __init abx500_temp_init(void)
{
return platform_driver_register(&abx500_temp_driver);
}
static void __exit abx500_temp_exit(void)
{
platform_driver_unregister(&abx500_temp_driver);
}
MODULE_AUTHOR("Martin Persson <martin.persson@stericsson.com>");
MODULE_DESCRIPTION("ABX500 temperature driver");
MODULE_LICENSE("GPL");
module_init(abx500_temp_init)
module_exit(abx500_temp_exit)
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