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hwmon fixes for v4.4-rc6 

- Select CONFIG_BITREVERSE for sht15 driver to avoid build failure
   if it is not configured.
 - Force wait for conversion time for the first valid data in tmp102
   driver to avoid reporting erroneous data to the thermal subsystem.
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Merge tag 'hwmon-for-linus-v4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon fixes from Guenter Roeck:

 - Select CONFIG_BITREVERSE for sht15 driver to avoid build failure if
   it is not configured.

 - Force wait for conversion time for the first valid data in tmp102
   driver to avoid reporting erroneous data to the thermal subsystem.

* tag 'hwmon-for-linus-v4.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (sht15) Select CONFIG_BITREVERSE
  hwmon: (tmp102) Force wait for conversion time for the first valid data
This commit is contained in:
Linus Torvalds 2015-12-18 12:51:52 -08:00
parent ccdd96be43 a3a316cfc4
commit 65d70e79cd
2 changed files with 16 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/hwmon/Kconfig
View File

@ -1217,6 +1217,7 @@ config SENSORS_PWM_FAN
config SENSORS_SHT15
tristate "Sensiron humidity and temperature sensors. SHT15 and compat."
depends on GPIOLIB || COMPILE_TEST
select BITREVERSE
help
If you say yes here you get support for the Sensiron SHT10, SHT11,
SHT15, SHT71, SHT75 humidity and temperature sensors.

16
drivers/hwmon/tmp102.c
View File

@ -58,6 +58,7 @@ struct tmp102 {
u16 config_orig;
unsigned long last_update;
int temp[3];
bool first_time;
};
/* convert left adjusted 13-bit TMP102 register value to milliCelsius */
@ -93,6 +94,7 @@ static struct tmp102 *tmp102_update_device(struct device *dev)
tmp102->temp[i] = tmp102_reg_to_mC(status);
}
tmp102->last_update = jiffies;
tmp102->first_time = false;
}
mutex_unlock(&tmp102->lock);
return tmp102;
@ -102,6 +104,12 @@ static int tmp102_read_temp(void *dev, int *temp)
{
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];
return 0;
@ -114,6 +122,10 @@ static ssize_t tmp102_show_temp(struct device *dev,
struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
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]);
}
@ -207,7 +219,9 @@ static int tmp102_probe(struct i2c_client *client,
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);
hwmon_dev = hwmon_device_register_with_groups(dev, client->name,