config SENSORS_NTC_THERMISTOR
tristate "NTC thermistor support"
depends on !OF || IIO=n || IIO
+ depends on THERMAL || !THERMAL_OF
help
This driver supports NTC thermistors sensor reading and its
interpretation. The driver can also monitor the temperature and
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
+#include <linux/thermal.h>
struct ntc_compensation {
int temp_c;
struct device *dev;
int n_comp;
char name[PLATFORM_NAME_SIZE];
+ struct thermal_zone_device *tz;
};
#if defined(CONFIG_OF) && IS_ENABLED(CONFIG_IIO)
return -EINVAL;
}
+static int ntc_read_temp(void *dev, long *temp)
+{
+ struct ntc_data *data = dev_get_drvdata(dev);
+ int ohm;
+
+ ohm = ntc_thermistor_get_ohm(data);
+ if (ohm < 0)
+ return ohm;
+
+ *temp = get_temp_mc(data, ohm);
+
+ return 0;
+}
+
static ssize_t ntc_show_name(struct device *dev,
struct device_attribute *attr, char *buf)
{
dev_info(&pdev->dev, "Thermistor type: %s successfully probed.\n",
pdev->name);
+ data->tz = thermal_zone_of_sensor_register(data->dev, 0, data->dev,
+ ntc_read_temp, NULL);
+ if (IS_ERR(data->tz)) {
+ dev_dbg(&pdev->dev, "Failed to register to thermal fw.\n");
+ data->tz = NULL;
+ }
+
return 0;
err_after_sysfs:
sysfs_remove_group(&data->dev->kobj, &ntc_attr_group);
ntc_iio_channel_release(pdata);
platform_set_drvdata(pdev, NULL);
+ thermal_zone_of_sensor_unregister(data->dev, data->tz);
+
return 0;
}