The patch titled drivers/hwmon/adm1021.c: add low_power support for adm1021 driver has been added to the -mm tree. Its filename is drivers-hwmon-adm1021c-add-low_power-support-for-adm1021-driver.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: drivers/hwmon/adm1021.c: add low_power support for adm1021 driver From: Michael Abbott <michael@xxxxxxxxxxxxxxx> Occasionally it is helpful to be able to turn a temperature sensor off (for example if it's making unwanted electrical noise). This patch adds a sysfs node to put any adm1021 compatible device into low power mode. Signed-off-by: Michael Abbott <michael.abbott@xxxxxxxxxxxxx> Cc: Jean Delvare <khali@xxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/hwmon/adm1021.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff -puN drivers/hwmon/adm1021.c~drivers-hwmon-adm1021c-add-low_power-support-for-adm1021-driver drivers/hwmon/adm1021.c --- a/drivers/hwmon/adm1021.c~drivers-hwmon-adm1021c-add-low_power-support-for-adm1021-driver +++ a/drivers/hwmon/adm1021.c @@ -83,6 +83,7 @@ struct adm1021_data { struct mutex update_lock; char valid; /* !=0 if following fields are valid */ + char low_power; /* !=0 if device in low power mode */ unsigned long last_updated; /* In jiffies */ int temp_max[2]; /* Register values */ @@ -213,6 +214,35 @@ static ssize_t set_temp_min(struct devic return count; } +static ssize_t show_low_power( + struct device *dev, struct device_attribute *devattr, char *buf) +{ + struct adm1021_data *data = adm1021_update_device(dev); + return sprintf(buf, "%d\n", data->low_power); +} + +static ssize_t set_low_power( + struct device *dev, struct device_attribute *devattr, + const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev); + struct adm1021_data *data = i2c_get_clientdata(client); + int low_power = simple_strtol(buf, NULL, 10) != 0; + mutex_lock(&data->update_lock); + + if (low_power != data->low_power) { + int config = i2c_smbus_read_byte_data( + client, ADM1021_REG_CONFIG_R); + data->low_power = low_power; + i2c_smbus_write_byte_data(client, ADM1021_REG_CONFIG_W, + (config & 0xBF) | (low_power << 6)); + } + mutex_unlock(&data->update_lock); + + return count; +} + + static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max, set_temp_max, 0); @@ -230,6 +260,8 @@ static SENSOR_DEVICE_ATTR(temp2_min_alar static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2); static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); +static DEVICE_ATTR( + low_power, S_IWUSR | S_IRUGO, show_low_power, set_low_power); static struct attribute *adm1021_attributes[] = { &sensor_dev_attr_temp1_max.dev_attr.attr, @@ -244,6 +276,7 @@ static struct attribute *adm1021_attribu &sensor_dev_attr_temp2_min_alarm.dev_attr.attr, &sensor_dev_attr_temp2_fault.dev_attr.attr, &dev_attr_alarms.attr, + &dev_attr_low_power.attr, NULL }; _ Patches currently in -mm which might be from michael@xxxxxxxxxxxxxxx are drivers-hwmon-adm1021c-support-high-precision-adm1023-remote-sensor.patch drivers-hwmon-adm1021c-add-low_power-support-for-adm1021-driver.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html