#define TMP102_THIGH_REG 0x03
struct tmp102 {
+ struct i2c_client *client;
struct device *hwmon_dev;
struct thermal_zone_device *tz;
struct mutex lock;
u16 config_orig;
unsigned long last_update;
int temp[3];
+ bool first_time;
};
/* convert left adjusted 13-bit TMP102 register value to milliCelsius */
TMP102_THIGH_REG,
};
-static struct tmp102 *tmp102_update_device(struct i2c_client *client)
+static struct tmp102 *tmp102_update_device(struct device *dev)
{
- struct tmp102 *tmp102 = i2c_get_clientdata(client);
+ struct tmp102 *tmp102 = dev_get_drvdata(dev);
+ struct i2c_client *client = tmp102->client;
mutex_lock(&tmp102->lock);
if (time_after(jiffies, tmp102->last_update + HZ / 3)) {
tmp102->temp[i] = tmp102_reg_to_mC(status);
}
tmp102->last_update = jiffies;
+ tmp102->first_time = false;
}
mutex_unlock(&tmp102->lock);
return tmp102;
}
-static int tmp102_read_temp(void *dev, long *temp)
+static int tmp102_read_temp(void *dev, int *temp)
{
- struct tmp102 *tmp102 = tmp102_update_device(to_i2c_client(dev));
+ struct tmp102 *tmp102 = tmp102_update_device(dev);
+
+ /* Is it too early even to return a conversion? */
+ if (tmp102->first_time) {
+ dev_dbg(dev, "%s: Conversion not ready yet..\n", __func__);
+ return -EAGAIN;
+ }
*temp = tmp102->temp[0];
char *buf)
{
struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
- struct tmp102 *tmp102 = tmp102_update_device(to_i2c_client(dev));
+ struct tmp102 *tmp102 = tmp102_update_device(dev);
+
+ /* Is it too early even to return a read? */
+ if (tmp102->first_time)
+ return -EAGAIN;
return sprintf(buf, "%d\n", tmp102->temp[sda->index]);
}
const char *buf, size_t count)
{
struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
- struct i2c_client *client = to_i2c_client(dev);
- struct tmp102 *tmp102 = i2c_get_clientdata(client);
+ struct tmp102 *tmp102 = dev_get_drvdata(dev);
+ struct i2c_client *client = tmp102->client;
long val;
int status;
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, tmp102_show_temp,
tmp102_set_temp, 2);
-static struct attribute *tmp102_attributes[] = {
+static struct attribute *tmp102_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
NULL
};
-
-static const struct attribute_group tmp102_attr_group = {
- .attrs = tmp102_attributes,
-};
+ATTRIBUTE_GROUPS(tmp102);
#define TMP102_CONFIG (TMP102_CONF_TM | TMP102_CONF_EM | TMP102_CONF_CR1)
#define TMP102_CONFIG_RD_ONLY (TMP102_CONF_R0 | TMP102_CONF_R1 | TMP102_CONF_AL)
+static const struct thermal_zone_of_device_ops tmp102_of_thermal_ops = {
+ .get_temp = tmp102_read_temp,
+};
+
static int tmp102_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
+ struct device *dev = &client->dev;
+ struct device *hwmon_dev;
struct tmp102 *tmp102;
int status;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_WORD_DATA)) {
- dev_err(&client->dev,
+ dev_err(dev,
"adapter doesn't support SMBus word transactions\n");
return -ENODEV;
}
- tmp102 = devm_kzalloc(&client->dev, sizeof(*tmp102), GFP_KERNEL);
+ tmp102 = devm_kzalloc(dev, sizeof(*tmp102), GFP_KERNEL);
if (!tmp102)
return -ENOMEM;
i2c_set_clientdata(client, tmp102);
+ tmp102->client = client;
status = i2c_smbus_read_word_swapped(client, TMP102_CONF_REG);
if (status < 0) {
- dev_err(&client->dev, "error reading config register\n");
+ dev_err(dev, "error reading config register\n");
return status;
}
tmp102->config_orig = status;
status = i2c_smbus_write_word_swapped(client, TMP102_CONF_REG,
TMP102_CONFIG);
if (status < 0) {
- dev_err(&client->dev, "error writing config register\n");
+ dev_err(dev, "error writing config register\n");
goto fail_restore_config;
}
status = i2c_smbus_read_word_swapped(client, TMP102_CONF_REG);
if (status < 0) {
- dev_err(&client->dev, "error reading config register\n");
+ dev_err(dev, "error reading config register\n");
goto fail_restore_config;
}
status &= ~TMP102_CONFIG_RD_ONLY;
if (status != TMP102_CONFIG) {
- dev_err(&client->dev, "config settings did not stick\n");
+ dev_err(dev, "config settings did not stick\n");
status = -ENODEV;
goto fail_restore_config;
}
- tmp102->last_update = jiffies - HZ;
+ tmp102->last_update = jiffies;
+ /* Mark that we are not ready with data until conversion is complete */
+ tmp102->first_time = true;
mutex_init(&tmp102->lock);
- status = sysfs_create_group(&client->dev.kobj, &tmp102_attr_group);
- if (status) {
- dev_dbg(&client->dev, "could not create sysfs files\n");
+ hwmon_dev = hwmon_device_register_with_groups(dev, client->name,
+ tmp102, tmp102_groups);
+ if (IS_ERR(hwmon_dev)) {
+ dev_dbg(dev, "unable to register hwmon device\n");
+ status = PTR_ERR(hwmon_dev);
goto fail_restore_config;
}
- tmp102->hwmon_dev = hwmon_device_register(&client->dev);
- if (IS_ERR(tmp102->hwmon_dev)) {
- dev_dbg(&client->dev, "unable to register hwmon device\n");
- status = PTR_ERR(tmp102->hwmon_dev);
- goto fail_remove_sysfs;
- }
-
- tmp102->tz = thermal_zone_of_sensor_register(&client->dev, 0,
- &client->dev,
- tmp102_read_temp, NULL);
+ tmp102->hwmon_dev = hwmon_dev;
+ tmp102->tz = thermal_zone_of_sensor_register(hwmon_dev, 0, hwmon_dev,
+ &tmp102_of_thermal_ops);
if (IS_ERR(tmp102->tz))
tmp102->tz = NULL;
- dev_info(&client->dev, "initialized\n");
+ dev_info(dev, "initialized\n");
return 0;
-fail_remove_sysfs:
- sysfs_remove_group(&client->dev.kobj, &tmp102_attr_group);
fail_restore_config:
i2c_smbus_write_word_swapped(client, TMP102_CONF_REG,
tmp102->config_orig);
{
struct tmp102 *tmp102 = i2c_get_clientdata(client);
- thermal_zone_of_sensor_unregister(&client->dev, tmp102->tz);
+ thermal_zone_of_sensor_unregister(tmp102->hwmon_dev, tmp102->tz);
hwmon_device_unregister(tmp102->hwmon_dev);
- sysfs_remove_group(&client->dev.kobj, &tmp102_attr_group);
/* Stop monitoring if device was stopped originally */
if (tmp102->config_orig & TMP102_CONF_SD) {
return 0;
}
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
static int tmp102_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
config &= ~TMP102_CONF_SD;
return i2c_smbus_write_word_swapped(client, TMP102_CONF_REG, config);
}
-
-static const struct dev_pm_ops tmp102_dev_pm_ops = {
- .suspend = tmp102_suspend,
- .resume = tmp102_resume,
-};
-
-#define TMP102_DEV_PM_OPS (&tmp102_dev_pm_ops)
-#else
-#define TMP102_DEV_PM_OPS NULL
#endif /* CONFIG_PM */
+static SIMPLE_DEV_PM_OPS(tmp102_dev_pm_ops, tmp102_suspend, tmp102_resume);
+
static const struct i2c_device_id tmp102_id[] = {
{ "tmp102", 0 },
{ }
static struct i2c_driver tmp102_driver = {
.driver.name = DRIVER_NAME,
- .driver.pm = TMP102_DEV_PM_OPS,
+ .driver.pm = &tmp102_dev_pm_ops,
.probe = tmp102_probe,
.remove = tmp102_remove,
.id_table = tmp102_id,
projects / firefly-linux-kernel-4.4.55.git / blobdiff