X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Fhwmon%2Flm83.c;h=8290476aee4ab981d6f918fb92d6b2940d4e4a65;hb=8ba406be53713efdd705666e2178cfe486fcfb27;hp=a49008b444c8ef483f3e6ec933578c3a9e57e240;hpb=8d5d45fb14680326f833295f2316a4ec5e357220;p=safe%2Fjmp%2Flinux-2.6 diff --git a/drivers/hwmon/lm83.c b/drivers/hwmon/lm83.c index a49008b..8290476 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) 2003-2009 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 @@ -32,8 +36,11 @@ #include #include #include -#include #include +#include +#include +#include +#include /* * Addresses to scan @@ -41,17 +48,10 @@ * addresses. */ -static unsigned short normal_i2c[] = { 0x18, 0x19, 0x1a, - 0x29, 0x2a, 0x2b, - 0x4c, 0x4d, 0x4e, - I2C_CLIENT_END }; -static unsigned int normal_isa[] = { I2C_CLIENT_ISA_END }; - -/* - * Insmod parameters - */ +static const unsigned short normal_i2c[] = { + 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END }; -SENSORS_INSMOD_1(lm83); +enum chips { lm83, lm82 }; /* * The LM83 registers @@ -114,22 +114,34 @@ static const u8 LM83_REG_W_HIGH[] = { * Functions declaration */ -static int lm83_attach_adapter(struct i2c_adapter *adapter); -static int lm83_detect(struct i2c_adapter *adapter, int address, int kind); -static int lm83_detach_client(struct i2c_client *client); +static int lm83_detect(struct i2c_client *new_client, + struct i2c_board_info *info); +static int lm83_probe(struct i2c_client *client, + const struct i2c_device_id *id); +static int lm83_remove(struct i2c_client *client); static struct lm83_data *lm83_update_device(struct device *dev); /* * Driver data (common to all clients) */ +static const struct i2c_device_id lm83_id[] = { + { "lm83", lm83 }, + { "lm82", lm82 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, lm83_id); + static struct i2c_driver lm83_driver = { - .owner = THIS_MODULE, - .name = "lm83", - .id = I2C_DRIVERID_LM83, - .flags = I2C_DF_NOTIFY, - .attach_adapter = lm83_attach_adapter, - .detach_client = lm83_detach_client, + .class = I2C_CLASS_HWMON, + .driver = { + .name = "lm83", + }, + .probe = lm83_probe, + .remove = lm83_remove, + .id_table = lm83_id, + .detect = lm83_detect, + .address_list = normal_i2c, }; /* @@ -137,8 +149,8 @@ static struct i2c_driver lm83_driver = { */ struct lm83_data { - struct i2c_client client; - struct semaphore update_lock; + struct device *hwmon_dev; + struct mutex update_lock; char valid; /* zero until following fields are valid */ unsigned long last_updated; /* in jiffies */ @@ -170,11 +182,11 @@ 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; } @@ -185,6 +197,16 @@ 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); @@ -202,161 +224,172 @@ 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_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_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_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); -/* - * Real code - */ +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_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 int lm83_attach_adapter(struct i2c_adapter *adapter) -{ - if (!(adapter->class & I2C_CLASS_HWMON)) - return 0; - return i2c_detect(adapter, &addr_data, lm83_detect); -} +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_fault.dev_attr.attr, + &sensor_dev_attr_temp4_max_alarm.dev_attr.attr, + &sensor_dev_attr_temp2_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, +}; /* - * The following function does more than just detection. If detection - * succeeds, it also registers the new chip. + * Real code */ -static int lm83_detect(struct i2c_adapter *adapter, int address, int kind) + +/* Return 0 if detection is successful, -ENODEV otherwise */ +static int lm83_detect(struct i2c_client *new_client, + struct i2c_board_info *info) { - struct i2c_client *new_client; - struct lm83_data *data; - int err = 0; - const char *name = ""; + struct i2c_adapter *adapter = new_client->adapter; + const char *name; + u8 man_id, chip_id; if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) - goto exit; - - if (!(data = kmalloc(sizeof(struct lm83_data), GFP_KERNEL))) { - err = -ENOMEM; - goto exit; + return -ENODEV; + + /* Detection */ + if ((i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS1) & 0xA8) || + (i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS2) & 0x48) || + (i2c_smbus_read_byte_data(new_client, LM83_REG_R_CONFIG) & 0x41)) { + dev_dbg(&adapter->dev, "LM83 detection failed at 0x%02x\n", + new_client->addr); + return -ENODEV; } - memset(data, 0, sizeof(struct lm83_data)); - /* The common I2C client data is placed right after the - * LM83-specific data. */ - new_client = &data->client; - i2c_set_clientdata(new_client, data); - new_client->addr = address; - new_client->adapter = adapter; - new_client->driver = &lm83_driver; - new_client->flags = 0; - - /* Now we do the detection and identification. A negative kind - * means that the driver was loaded with no force parameter - * (default), so we must both detect and identify the chip - * (actually there is only one possible kind of chip for now, LM83). - * A zero kind means that the driver was loaded with the force - * parameter, the detection step shall be skipped. A positive kind - * means that the driver was loaded with the force parameter and a - * given kind of chip is requested, so both the detection and the - * identification steps are skipped. */ - - /* Default to an LM83 if forced */ - if (kind == 0) - kind = lm83; - - if (kind < 0) { /* detection */ - if (((i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS1) - & 0xA8) != 0x00) || - ((i2c_smbus_read_byte_data(new_client, LM83_REG_R_STATUS2) - & 0x48) != 0x00) || - ((i2c_smbus_read_byte_data(new_client, LM83_REG_R_CONFIG) - & 0x41) != 0x00)) { - dev_dbg(&adapter->dev, - "LM83 detection failed at 0x%02x.\n", address); - goto exit_free; - } - } + /* Identification */ + man_id = i2c_smbus_read_byte_data(new_client, LM83_REG_R_MAN_ID); + if (man_id != 0x01) /* National Semiconductor */ + return -ENODEV; - if (kind <= 0) { /* identification */ - u8 man_id, chip_id; + chip_id = i2c_smbus_read_byte_data(new_client, LM83_REG_R_CHIP_ID); + switch (chip_id) { + case 0x03: + name = "lm83"; + break; + case 0x01: + name = "lm82"; + break; + default: + /* identification failed */ + dev_info(&adapter->dev, + "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n", + man_id, chip_id); + return -ENODEV; + } - man_id = i2c_smbus_read_byte_data(new_client, - LM83_REG_R_MAN_ID); - chip_id = i2c_smbus_read_byte_data(new_client, - LM83_REG_R_CHIP_ID); + strlcpy(info->type, name, I2C_NAME_SIZE); - if (man_id == 0x01) { /* National Semiconductor */ - if (chip_id == 0x03) { - kind = lm83; - } - } + return 0; +} - if (kind <= 0) { /* identification failed */ - dev_info(&adapter->dev, - "Unsupported chip (man_id=0x%02X, " - "chip_id=0x%02X).\n", man_id, chip_id); - goto exit_free; - } - } +static int lm83_probe(struct i2c_client *new_client, + const struct i2c_device_id *id) +{ + struct lm83_data *data; + int err; - if (kind == lm83) { - name = "lm83"; + data = kzalloc(sizeof(struct lm83_data), GFP_KERNEL); + if (!data) { + err = -ENOMEM; + goto exit; } - /* We can fill in the remaining client fields */ - strlcpy(new_client->name, name, I2C_NAME_SIZE); + i2c_set_clientdata(new_client, data); data->valid = 0; - init_MUTEX(&data->update_lock); - - /* Tell the I2C layer a new client has arrived */ - if ((err = i2c_attach_client(new_client))) - goto exit_free; + mutex_init(&data->update_lock); /* - * 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 */ - 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); + if ((err = sysfs_create_group(&new_client->dev.kobj, &lm83_group))) + goto exit_free; + + if (id->driver_data == lm83) { + if ((err = sysfs_create_group(&new_client->dev.kobj, + &lm83_group_opt))) + goto exit_remove_files; + } + + data->hwmon_dev = hwmon_device_register(&new_client->dev); + if (IS_ERR(data->hwmon_dev)) { + err = PTR_ERR(data->hwmon_dev); + goto exit_remove_files; + } 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_free: kfree(data); exit: return err; } -static int lm83_detach_client(struct i2c_client *client) +static int lm83_remove(struct i2c_client *client) { - int err; + struct lm83_data *data = i2c_get_clientdata(client); - if ((err = i2c_detach_client(client))) { - dev_err(&client->dev, - "Client deregistration failed, client not detached.\n"); - return err; - } + hwmon_device_unregister(data->hwmon_dev); + sysfs_remove_group(&client->dev.kobj, &lm83_group); + sysfs_remove_group(&client->dev.kobj, &lm83_group_opt); - kfree(i2c_get_clientdata(client)); + kfree(data); return 0; } @@ -365,7 +398,7 @@ 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; @@ -385,7 +418,7 @@ static struct lm83_data *lm83_update_device(struct device *dev) data->valid = 1; } - up(&data->update_lock); + mutex_unlock(&data->update_lock); return data; }