X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fhwmon%2Flm83.c;h=feb87b41e9865ab10750c9bf247797690ae6d67b;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=26dfa9e216c2814f9419b318ed8289e46f6b8a21;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git diff --git a/drivers/hwmon/lm83.c b/drivers/hwmon/lm83.c index 26dfa9e21..feb87b41e 100644 --- a/drivers/hwmon/lm83.c +++ b/drivers/hwmon/lm83.c @@ -1,7 +1,7 @@ /* * lm83.c - Part of lm_sensors, Linux kernel modules for hardware * monitoring - * Copyright (C) 2003-2005 Jean Delvare + * Copyright (C) 2003-2006 Jean Delvare * * Heavily inspired from the lm78, lm75 and adm1021 drivers. The LM83 is * a sensor chip made by National Semiconductor. It reports up to four @@ -12,6 +12,10 @@ * Since the datasheet omits to give the chip stepping code, I give it * here: 0x03 (at register 0xff). * + * Also supports the LM82 temp sensor, which is basically a stripped down + * model of the LM83. Datasheet is here: + * http://www.national.com/pf/LM/LM82.html + * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or @@ -35,6 +39,8 @@ #include #include #include +#include +#include /* * Addresses to scan @@ -51,7 +57,7 @@ static unsigned short normal_i2c[] = { 0x18, 0x19, 0x1a, * Insmod parameters */ -I2C_CLIENT_INSMOD_1(lm83); +I2C_CLIENT_INSMOD_2(lm83, lm82); /* * The LM83 registers @@ -139,7 +145,7 @@ static struct i2c_driver lm83_driver = { struct lm83_data { struct i2c_client client; struct class_device *class_dev; - struct semaphore update_lock; + struct mutex update_lock; char valid; /* zero until following fields are valid */ unsigned long last_updated; /* in jiffies */ @@ -171,11 +177,11 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *devattr, long val = simple_strtol(buf, NULL, 10); int nr = attr->index; - down(&data->update_lock); + mutex_lock(&data->update_lock); data->temp[nr] = TEMP_TO_REG(val); i2c_smbus_write_byte_data(client, LM83_REG_W_HIGH[nr - 4], data->temp[nr]); - up(&data->update_lock); + mutex_unlock(&data->update_lock); return count; } @@ -186,6 +192,16 @@ static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy, return sprintf(buf, "%d\n", data->alarms); } +static ssize_t show_alarm(struct device *dev, struct device_attribute + *devattr, char *buf) +{ + struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); + struct lm83_data *data = lm83_update_device(dev); + int bitnr = attr->index; + + return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1); +} + static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1); static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2); @@ -203,8 +219,64 @@ static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp, NULL, 8); static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp, set_temp, 8); static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp, NULL, 8); + +/* Individual alarm files */ +static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0); +static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 1); +static SENSOR_DEVICE_ATTR(temp3_input_fault, S_IRUGO, show_alarm, NULL, 2); +static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 4); +static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6); +static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 8); +static SENSOR_DEVICE_ATTR(temp4_crit_alarm, S_IRUGO, show_alarm, NULL, 9); +static SENSOR_DEVICE_ATTR(temp4_input_fault, S_IRUGO, show_alarm, NULL, 10); +static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, show_alarm, NULL, 12); +static SENSOR_DEVICE_ATTR(temp2_input_fault, S_IRUGO, show_alarm, NULL, 13); +static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 15); +/* Raw alarm file for compatibility */ static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); +static struct attribute *lm83_attributes[] = { + &sensor_dev_attr_temp1_input.dev_attr.attr, + &sensor_dev_attr_temp3_input.dev_attr.attr, + &sensor_dev_attr_temp1_max.dev_attr.attr, + &sensor_dev_attr_temp3_max.dev_attr.attr, + &sensor_dev_attr_temp1_crit.dev_attr.attr, + &sensor_dev_attr_temp3_crit.dev_attr.attr, + + &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp3_input_fault.dev_attr.attr, + &sensor_dev_attr_temp3_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, + &dev_attr_alarms.attr, + NULL +}; + +static const struct attribute_group lm83_group = { + .attrs = lm83_attributes, +}; + +static struct attribute *lm83_attributes_opt[] = { + &sensor_dev_attr_temp2_input.dev_attr.attr, + &sensor_dev_attr_temp4_input.dev_attr.attr, + &sensor_dev_attr_temp2_max.dev_attr.attr, + &sensor_dev_attr_temp4_max.dev_attr.attr, + &sensor_dev_attr_temp2_crit.dev_attr.attr, + &sensor_dev_attr_temp4_crit.dev_attr.attr, + + &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp4_crit_alarm.dev_attr.attr, + &sensor_dev_attr_temp4_input_fault.dev_attr.attr, + &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_input_fault.dev_attr.attr, + &sensor_dev_attr_temp2_max_alarm.dev_attr.attr, + NULL +}; + +static const struct attribute_group lm83_group_opt = { + .attrs = lm83_attributes_opt, +}; + /* * Real code */ @@ -282,6 +354,9 @@ static int lm83_detect(struct i2c_adapter *adapter, int address, int kind) if (man_id == 0x01) { /* National Semiconductor */ if (chip_id == 0x03) { kind = lm83; + } else + if (chip_id == 0x01) { + kind = lm82; } } @@ -295,57 +370,47 @@ static int lm83_detect(struct i2c_adapter *adapter, int address, int kind) if (kind == lm83) { name = "lm83"; + } else + if (kind == lm82) { + name = "lm82"; } /* We can fill in the remaining client fields */ strlcpy(new_client->name, name, I2C_NAME_SIZE); data->valid = 0; - init_MUTEX(&data->update_lock); + mutex_init(&data->update_lock); /* Tell the I2C layer a new client has arrived */ if ((err = i2c_attach_client(new_client))) goto exit_free; /* - * Initialize the LM83 chip - * (Nothing to do for this one.) + * Register sysfs hooks + * The LM82 can only monitor one external diode which is + * at the same register as the LM83 temp3 entry - so we + * declare 1 and 3 common, and then 2 and 4 only for the LM83. */ - /* Register sysfs hooks */ + if ((err = sysfs_create_group(&new_client->dev.kobj, &lm83_group))) + goto exit_detach; + + if (kind == lm83) { + if ((err = sysfs_create_group(&new_client->dev.kobj, + &lm83_group_opt))) + goto exit_remove_files; + } + data->class_dev = hwmon_device_register(&new_client->dev); if (IS_ERR(data->class_dev)) { err = PTR_ERR(data->class_dev); - goto exit_detach; + goto exit_remove_files; } - device_create_file(&new_client->dev, - &sensor_dev_attr_temp1_input.dev_attr); - device_create_file(&new_client->dev, - &sensor_dev_attr_temp2_input.dev_attr); - device_create_file(&new_client->dev, - &sensor_dev_attr_temp3_input.dev_attr); - device_create_file(&new_client->dev, - &sensor_dev_attr_temp4_input.dev_attr); - device_create_file(&new_client->dev, - &sensor_dev_attr_temp1_max.dev_attr); - device_create_file(&new_client->dev, - &sensor_dev_attr_temp2_max.dev_attr); - device_create_file(&new_client->dev, - &sensor_dev_attr_temp3_max.dev_attr); - device_create_file(&new_client->dev, - &sensor_dev_attr_temp4_max.dev_attr); - device_create_file(&new_client->dev, - &sensor_dev_attr_temp1_crit.dev_attr); - device_create_file(&new_client->dev, - &sensor_dev_attr_temp2_crit.dev_attr); - device_create_file(&new_client->dev, - &sensor_dev_attr_temp3_crit.dev_attr); - device_create_file(&new_client->dev, - &sensor_dev_attr_temp4_crit.dev_attr); - device_create_file(&new_client->dev, &dev_attr_alarms); - return 0; +exit_remove_files: + sysfs_remove_group(&new_client->dev.kobj, &lm83_group); + sysfs_remove_group(&new_client->dev.kobj, &lm83_group_opt); exit_detach: i2c_detach_client(new_client); exit_free: @@ -360,6 +425,8 @@ static int lm83_detach_client(struct i2c_client *client) int err; hwmon_device_unregister(data->class_dev); + sysfs_remove_group(&client->dev.kobj, &lm83_group); + sysfs_remove_group(&client->dev.kobj, &lm83_group_opt); if ((err = i2c_detach_client(client))) return err; @@ -373,7 +440,7 @@ static struct lm83_data *lm83_update_device(struct device *dev) struct i2c_client *client = to_i2c_client(dev); struct lm83_data *data = i2c_get_clientdata(client); - down(&data->update_lock); + mutex_lock(&data->update_lock); if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { int nr; @@ -393,7 +460,7 @@ static struct lm83_data *lm83_update_device(struct device *dev) data->valid = 1; } - up(&data->update_lock); + mutex_unlock(&data->update_lock); return data; }