| /* |
| * lm80.c - From lm_sensors, Linux kernel modules for hardware |
| * monitoring |
| * Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl> |
| * and Philip Edelbrock <phil@netroedge.com> |
| * |
| * Ported to Linux 2.6 by Tiago Sousa <mirage@kaotik.org> |
| * |
| * 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 |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/jiffies.h> |
| #include <linux/i2c.h> |
| #include <linux/i2c-sensor.h> |
| #include <linux/hwmon.h> |
| #include <linux/err.h> |
| |
| /* Addresses to scan */ |
| static unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, |
| 0x2d, 0x2e, 0x2f, I2C_CLIENT_END }; |
| |
| /* Insmod parameters */ |
| SENSORS_INSMOD_1(lm80); |
| |
| /* Many LM80 constants specified below */ |
| |
| /* The LM80 registers */ |
| #define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2) |
| #define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2) |
| #define LM80_REG_IN(nr) (0x20 + (nr)) |
| |
| #define LM80_REG_FAN1 0x28 |
| #define LM80_REG_FAN2 0x29 |
| #define LM80_REG_FAN_MIN(nr) (0x3b + (nr)) |
| |
| #define LM80_REG_TEMP 0x27 |
| #define LM80_REG_TEMP_HOT_MAX 0x38 |
| #define LM80_REG_TEMP_HOT_HYST 0x39 |
| #define LM80_REG_TEMP_OS_MAX 0x3a |
| #define LM80_REG_TEMP_OS_HYST 0x3b |
| |
| #define LM80_REG_CONFIG 0x00 |
| #define LM80_REG_ALARM1 0x01 |
| #define LM80_REG_ALARM2 0x02 |
| #define LM80_REG_MASK1 0x03 |
| #define LM80_REG_MASK2 0x04 |
| #define LM80_REG_FANDIV 0x05 |
| #define LM80_REG_RES 0x06 |
| |
| |
| /* Conversions. Rounding and limit checking is only done on the TO_REG |
| variants. Note that you should be a bit careful with which arguments |
| these macros are called: arguments may be evaluated more than once. |
| Fixing this is just not worth it. */ |
| |
| #define IN_TO_REG(val) (SENSORS_LIMIT(((val)+5)/10,0,255)) |
| #define IN_FROM_REG(val) ((val)*10) |
| |
| static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div) |
| { |
| if (rpm == 0) |
| return 255; |
| rpm = SENSORS_LIMIT(rpm, 1, 1000000); |
| return SENSORS_LIMIT((1350000 + rpm*div / 2) / (rpm*div), 1, 254); |
| } |
| |
| #define FAN_FROM_REG(val,div) ((val)==0?-1:\ |
| (val)==255?0:1350000/((div)*(val))) |
| |
| static inline long TEMP_FROM_REG(u16 temp) |
| { |
| long res; |
| |
| temp >>= 4; |
| if (temp < 0x0800) |
| res = 625 * (long) temp; |
| else |
| res = ((long) temp - 0x01000) * 625; |
| |
| return res / 10; |
| } |
| |
| #define TEMP_LIMIT_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000) |
| |
| #define TEMP_LIMIT_TO_REG(val) SENSORS_LIMIT((val)<0?\ |
| ((val)-500)/1000:((val)+500)/1000,0,255) |
| |
| #define DIV_FROM_REG(val) (1 << (val)) |
| |
| /* |
| * Client data (each client gets its own) |
| */ |
| |
| struct lm80_data { |
| struct i2c_client client; |
| struct class_device *class_dev; |
| struct semaphore update_lock; |
| char valid; /* !=0 if following fields are valid */ |
| unsigned long last_updated; /* In jiffies */ |
| |
| u8 in[7]; /* Register value */ |
| u8 in_max[7]; /* Register value */ |
| u8 in_min[7]; /* Register value */ |
| u8 fan[2]; /* Register value */ |
| u8 fan_min[2]; /* Register value */ |
| u8 fan_div[2]; /* Register encoding, shifted right */ |
| u16 temp; /* Register values, shifted right */ |
| u8 temp_hot_max; /* Register value */ |
| u8 temp_hot_hyst; /* Register value */ |
| u8 temp_os_max; /* Register value */ |
| u8 temp_os_hyst; /* Register value */ |
| u16 alarms; /* Register encoding, combined */ |
| }; |
| |
| /* |
| * Functions declaration |
| */ |
| |
| static int lm80_attach_adapter(struct i2c_adapter *adapter); |
| static int lm80_detect(struct i2c_adapter *adapter, int address, int kind); |
| static void lm80_init_client(struct i2c_client *client); |
| static int lm80_detach_client(struct i2c_client *client); |
| static struct lm80_data *lm80_update_device(struct device *dev); |
| static int lm80_read_value(struct i2c_client *client, u8 reg); |
| static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value); |
| |
| /* |
| * Driver data (common to all clients) |
| */ |
| |
| static struct i2c_driver lm80_driver = { |
| .owner = THIS_MODULE, |
| .name = "lm80", |
| .id = I2C_DRIVERID_LM80, |
| .flags = I2C_DF_NOTIFY, |
| .attach_adapter = lm80_attach_adapter, |
| .detach_client = lm80_detach_client, |
| }; |
| |
| /* |
| * Sysfs stuff |
| */ |
| |
| #define show_in(suffix, value) \ |
| static ssize_t show_in_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \ |
| { \ |
| struct lm80_data *data = lm80_update_device(dev); \ |
| return sprintf(buf, "%d\n", IN_FROM_REG(data->value)); \ |
| } |
| show_in(min0, in_min[0]); |
| show_in(min1, in_min[1]); |
| show_in(min2, in_min[2]); |
| show_in(min3, in_min[3]); |
| show_in(min4, in_min[4]); |
| show_in(min5, in_min[5]); |
| show_in(min6, in_min[6]); |
| show_in(max0, in_max[0]); |
| show_in(max1, in_max[1]); |
| show_in(max2, in_max[2]); |
| show_in(max3, in_max[3]); |
| show_in(max4, in_max[4]); |
| show_in(max5, in_max[5]); |
| show_in(max6, in_max[6]); |
| show_in(input0, in[0]); |
| show_in(input1, in[1]); |
| show_in(input2, in[2]); |
| show_in(input3, in[3]); |
| show_in(input4, in[4]); |
| show_in(input5, in[5]); |
| show_in(input6, in[6]); |
| |
| #define set_in(suffix, value, reg) \ |
| static ssize_t set_in_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \ |
| size_t count) \ |
| { \ |
| struct i2c_client *client = to_i2c_client(dev); \ |
| struct lm80_data *data = i2c_get_clientdata(client); \ |
| long val = simple_strtol(buf, NULL, 10); \ |
| \ |
| down(&data->update_lock);\ |
| data->value = IN_TO_REG(val); \ |
| lm80_write_value(client, reg, data->value); \ |
| up(&data->update_lock);\ |
| return count; \ |
| } |
| set_in(min0, in_min[0], LM80_REG_IN_MIN(0)); |
| set_in(min1, in_min[1], LM80_REG_IN_MIN(1)); |
| set_in(min2, in_min[2], LM80_REG_IN_MIN(2)); |
| set_in(min3, in_min[3], LM80_REG_IN_MIN(3)); |
| set_in(min4, in_min[4], LM80_REG_IN_MIN(4)); |
| set_in(min5, in_min[5], LM80_REG_IN_MIN(5)); |
| set_in(min6, in_min[6], LM80_REG_IN_MIN(6)); |
| set_in(max0, in_max[0], LM80_REG_IN_MAX(0)); |
| set_in(max1, in_max[1], LM80_REG_IN_MAX(1)); |
| set_in(max2, in_max[2], LM80_REG_IN_MAX(2)); |
| set_in(max3, in_max[3], LM80_REG_IN_MAX(3)); |
| set_in(max4, in_max[4], LM80_REG_IN_MAX(4)); |
| set_in(max5, in_max[5], LM80_REG_IN_MAX(5)); |
| set_in(max6, in_max[6], LM80_REG_IN_MAX(6)); |
| |
| #define show_fan(suffix, value, div) \ |
| static ssize_t show_fan_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \ |
| { \ |
| struct lm80_data *data = lm80_update_device(dev); \ |
| return sprintf(buf, "%d\n", FAN_FROM_REG(data->value, \ |
| DIV_FROM_REG(data->div))); \ |
| } |
| show_fan(min1, fan_min[0], fan_div[0]); |
| show_fan(min2, fan_min[1], fan_div[1]); |
| show_fan(input1, fan[0], fan_div[0]); |
| show_fan(input2, fan[1], fan_div[1]); |
| |
| #define show_fan_div(suffix, value) \ |
| static ssize_t show_fan_div##suffix(struct device *dev, struct device_attribute *attr, char *buf) \ |
| { \ |
| struct lm80_data *data = lm80_update_device(dev); \ |
| return sprintf(buf, "%d\n", DIV_FROM_REG(data->value)); \ |
| } |
| show_fan_div(1, fan_div[0]); |
| show_fan_div(2, fan_div[1]); |
| |
| #define set_fan(suffix, value, reg, div) \ |
| static ssize_t set_fan_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \ |
| size_t count) \ |
| { \ |
| struct i2c_client *client = to_i2c_client(dev); \ |
| struct lm80_data *data = i2c_get_clientdata(client); \ |
| long val = simple_strtoul(buf, NULL, 10); \ |
| \ |
| down(&data->update_lock);\ |
| data->value = FAN_TO_REG(val, DIV_FROM_REG(data->div)); \ |
| lm80_write_value(client, reg, data->value); \ |
| up(&data->update_lock);\ |
| return count; \ |
| } |
| set_fan(min1, fan_min[0], LM80_REG_FAN_MIN(1), fan_div[0]); |
| set_fan(min2, fan_min[1], LM80_REG_FAN_MIN(2), fan_div[1]); |
| |
| /* Note: we save and restore the fan minimum here, because its value is |
| determined in part by the fan divisor. This follows the principle of |
| least suprise; the user doesn't expect the fan minimum to change just |
| because the divisor changed. */ |
| static ssize_t set_fan_div(struct device *dev, const char *buf, |
| size_t count, int nr) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct lm80_data *data = i2c_get_clientdata(client); |
| unsigned long min, val = simple_strtoul(buf, NULL, 10); |
| u8 reg; |
| |
| /* Save fan_min */ |
| down(&data->update_lock); |
| min = FAN_FROM_REG(data->fan_min[nr], |
| DIV_FROM_REG(data->fan_div[nr])); |
| |
| switch (val) { |
| case 1: data->fan_div[nr] = 0; break; |
| case 2: data->fan_div[nr] = 1; break; |
| case 4: data->fan_div[nr] = 2; break; |
| case 8: data->fan_div[nr] = 3; break; |
| default: |
| dev_err(&client->dev, "fan_div value %ld not " |
| "supported. Choose one of 1, 2, 4 or 8!\n", val); |
| up(&data->update_lock); |
| return -EINVAL; |
| } |
| |
| reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1)))) |
| | (data->fan_div[nr] << (2 * (nr + 1))); |
| lm80_write_value(client, LM80_REG_FANDIV, reg); |
| |
| /* Restore fan_min */ |
| data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr])); |
| lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]); |
| up(&data->update_lock); |
| |
| return count; |
| } |
| |
| #define set_fan_div(number) \ |
| static ssize_t set_fan_div##number(struct device *dev, struct device_attribute *attr, const char *buf, \ |
| size_t count) \ |
| { \ |
| return set_fan_div(dev, buf, count, number - 1); \ |
| } |
| set_fan_div(1); |
| set_fan_div(2); |
| |
| static ssize_t show_temp_input1(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct lm80_data *data = lm80_update_device(dev); |
| return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp)); |
| } |
| |
| #define show_temp(suffix, value) \ |
| static ssize_t show_temp_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \ |
| { \ |
| struct lm80_data *data = lm80_update_device(dev); \ |
| return sprintf(buf, "%d\n", TEMP_LIMIT_FROM_REG(data->value)); \ |
| } |
| show_temp(hot_max, temp_hot_max); |
| show_temp(hot_hyst, temp_hot_hyst); |
| show_temp(os_max, temp_os_max); |
| show_temp(os_hyst, temp_os_hyst); |
| |
| #define set_temp(suffix, value, reg) \ |
| static ssize_t set_temp_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \ |
| size_t count) \ |
| { \ |
| struct i2c_client *client = to_i2c_client(dev); \ |
| struct lm80_data *data = i2c_get_clientdata(client); \ |
| long val = simple_strtoul(buf, NULL, 10); \ |
| \ |
| down(&data->update_lock); \ |
| data->value = TEMP_LIMIT_TO_REG(val); \ |
| lm80_write_value(client, reg, data->value); \ |
| up(&data->update_lock); \ |
| return count; \ |
| } |
| set_temp(hot_max, temp_hot_max, LM80_REG_TEMP_HOT_MAX); |
| set_temp(hot_hyst, temp_hot_hyst, LM80_REG_TEMP_HOT_HYST); |
| set_temp(os_max, temp_os_max, LM80_REG_TEMP_OS_MAX); |
| set_temp(os_hyst, temp_os_hyst, LM80_REG_TEMP_OS_HYST); |
| |
| static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| struct lm80_data *data = lm80_update_device(dev); |
| return sprintf(buf, "%u\n", data->alarms); |
| } |
| |
| static DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min0, set_in_min0); |
| static DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min1, set_in_min1); |
| static DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min2, set_in_min2); |
| static DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO, show_in_min3, set_in_min3); |
| static DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO, show_in_min4, set_in_min4); |
| static DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO, show_in_min5, set_in_min5); |
| static DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO, show_in_min6, set_in_min6); |
| static DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max0, set_in_max0); |
| static DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max1, set_in_max1); |
| static DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max2, set_in_max2); |
| static DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO, show_in_max3, set_in_max3); |
| static DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO, show_in_max4, set_in_max4); |
| static DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO, show_in_max5, set_in_max5); |
| static DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO, show_in_max6, set_in_max6); |
| static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL); |
| static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL); |
| static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL); |
| static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL); |
| static DEVICE_ATTR(in4_input, S_IRUGO, show_in_input4, NULL); |
| static DEVICE_ATTR(in5_input, S_IRUGO, show_in_input5, NULL); |
| static DEVICE_ATTR(in6_input, S_IRUGO, show_in_input6, NULL); |
| static DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min1, |
| set_fan_min1); |
| static DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min2, |
| set_fan_min2); |
| static DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input1, NULL); |
| static DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input2, NULL); |
| static DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div1, set_fan_div1); |
| static DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div2, set_fan_div2); |
| static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL); |
| static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_hot_max, |
| set_temp_hot_max); |
| static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hot_hyst, |
| set_temp_hot_hyst); |
| static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_os_max, |
| set_temp_os_max); |
| static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_os_hyst, |
| set_temp_os_hyst); |
| static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
| |
| /* |
| * Real code |
| */ |
| |
| static int lm80_attach_adapter(struct i2c_adapter *adapter) |
| { |
| if (!(adapter->class & I2C_CLASS_HWMON)) |
| return 0; |
| return i2c_detect(adapter, &addr_data, lm80_detect); |
| } |
| |
| int lm80_detect(struct i2c_adapter *adapter, int address, int kind) |
| { |
| int i, cur; |
| struct i2c_client *new_client; |
| struct lm80_data *data; |
| int err = 0; |
| const char *name; |
| |
| if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
| goto exit; |
| |
| /* OK. For now, we presume we have a valid client. We now create the |
| client structure, even though we cannot fill it completely yet. |
| But it allows us to access lm80_{read,write}_value. */ |
| if (!(data = kmalloc(sizeof(struct lm80_data), GFP_KERNEL))) { |
| err = -ENOMEM; |
| goto exit; |
| } |
| memset(data, 0, sizeof(struct lm80_data)); |
| |
| new_client = &data->client; |
| i2c_set_clientdata(new_client, data); |
| new_client->addr = address; |
| new_client->adapter = adapter; |
| new_client->driver = &lm80_driver; |
| new_client->flags = 0; |
| |
| /* Now, we do the remaining detection. It is lousy. */ |
| if (lm80_read_value(new_client, LM80_REG_ALARM2) & 0xc0) |
| goto error_free; |
| for (i = 0x2a; i <= 0x3d; i++) { |
| cur = i2c_smbus_read_byte_data(new_client, i); |
| if ((i2c_smbus_read_byte_data(new_client, i + 0x40) != cur) |
| || (i2c_smbus_read_byte_data(new_client, i + 0x80) != cur) |
| || (i2c_smbus_read_byte_data(new_client, i + 0xc0) != cur)) |
| goto error_free; |
| } |
| |
| /* Determine the chip type - only one kind supported! */ |
| kind = lm80; |
| name = "lm80"; |
| |
| /* Fill in the remaining client fields and put it into the global list */ |
| strlcpy(new_client->name, name, I2C_NAME_SIZE); |
| 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 error_free; |
| |
| /* Initialize the LM80 chip */ |
| lm80_init_client(new_client); |
| |
| /* A few vars need to be filled upon startup */ |
| data->fan_min[0] = lm80_read_value(new_client, LM80_REG_FAN_MIN(1)); |
| data->fan_min[1] = lm80_read_value(new_client, LM80_REG_FAN_MIN(2)); |
| |
| /* Register sysfs hooks */ |
| data->class_dev = hwmon_device_register(&new_client->dev); |
| if (IS_ERR(data->class_dev)) { |
| err = PTR_ERR(data->class_dev); |
| goto error_detach; |
| } |
| |
| device_create_file(&new_client->dev, &dev_attr_in0_min); |
| device_create_file(&new_client->dev, &dev_attr_in1_min); |
| device_create_file(&new_client->dev, &dev_attr_in2_min); |
| device_create_file(&new_client->dev, &dev_attr_in3_min); |
| device_create_file(&new_client->dev, &dev_attr_in4_min); |
| device_create_file(&new_client->dev, &dev_attr_in5_min); |
| device_create_file(&new_client->dev, &dev_attr_in6_min); |
| device_create_file(&new_client->dev, &dev_attr_in0_max); |
| device_create_file(&new_client->dev, &dev_attr_in1_max); |
| device_create_file(&new_client->dev, &dev_attr_in2_max); |
| device_create_file(&new_client->dev, &dev_attr_in3_max); |
| device_create_file(&new_client->dev, &dev_attr_in4_max); |
| device_create_file(&new_client->dev, &dev_attr_in5_max); |
| device_create_file(&new_client->dev, &dev_attr_in6_max); |
| device_create_file(&new_client->dev, &dev_attr_in0_input); |
| device_create_file(&new_client->dev, &dev_attr_in1_input); |
| device_create_file(&new_client->dev, &dev_attr_in2_input); |
| device_create_file(&new_client->dev, &dev_attr_in3_input); |
| device_create_file(&new_client->dev, &dev_attr_in4_input); |
| device_create_file(&new_client->dev, &dev_attr_in5_input); |
| device_create_file(&new_client->dev, &dev_attr_in6_input); |
| device_create_file(&new_client->dev, &dev_attr_fan1_min); |
| device_create_file(&new_client->dev, &dev_attr_fan2_min); |
| device_create_file(&new_client->dev, &dev_attr_fan1_input); |
| device_create_file(&new_client->dev, &dev_attr_fan2_input); |
| device_create_file(&new_client->dev, &dev_attr_fan1_div); |
| device_create_file(&new_client->dev, &dev_attr_fan2_div); |
| device_create_file(&new_client->dev, &dev_attr_temp1_input); |
| device_create_file(&new_client->dev, &dev_attr_temp1_max); |
| device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst); |
| device_create_file(&new_client->dev, &dev_attr_temp1_crit); |
| device_create_file(&new_client->dev, &dev_attr_temp1_crit_hyst); |
| device_create_file(&new_client->dev, &dev_attr_alarms); |
| |
| return 0; |
| |
| error_detach: |
| i2c_detach_client(new_client); |
| error_free: |
| kfree(data); |
| exit: |
| return err; |
| } |
| |
| static int lm80_detach_client(struct i2c_client *client) |
| { |
| struct lm80_data *data = i2c_get_clientdata(client); |
| int err; |
| |
| hwmon_device_unregister(data->class_dev); |
| |
| if ((err = i2c_detach_client(client))) { |
| dev_err(&client->dev, "Client deregistration failed, " |
| "client not detached.\n"); |
| return err; |
| } |
| |
| kfree(data); |
| return 0; |
| } |
| |
| static int lm80_read_value(struct i2c_client *client, u8 reg) |
| { |
| return i2c_smbus_read_byte_data(client, reg); |
| } |
| |
| static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value) |
| { |
| return i2c_smbus_write_byte_data(client, reg, value); |
| } |
| |
| /* Called when we have found a new LM80. */ |
| static void lm80_init_client(struct i2c_client *client) |
| { |
| /* Reset all except Watchdog values and last conversion values |
| This sets fan-divs to 2, among others. This makes most other |
| initializations unnecessary */ |
| lm80_write_value(client, LM80_REG_CONFIG, 0x80); |
| /* Set 11-bit temperature resolution */ |
| lm80_write_value(client, LM80_REG_RES, 0x08); |
| |
| /* Start monitoring */ |
| lm80_write_value(client, LM80_REG_CONFIG, 0x01); |
| } |
| |
| static struct lm80_data *lm80_update_device(struct device *dev) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| struct lm80_data *data = i2c_get_clientdata(client); |
| int i; |
| |
| down(&data->update_lock); |
| |
| if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) { |
| dev_dbg(&client->dev, "Starting lm80 update\n"); |
| for (i = 0; i <= 6; i++) { |
| data->in[i] = |
| lm80_read_value(client, LM80_REG_IN(i)); |
| data->in_min[i] = |
| lm80_read_value(client, LM80_REG_IN_MIN(i)); |
| data->in_max[i] = |
| lm80_read_value(client, LM80_REG_IN_MAX(i)); |
| } |
| data->fan[0] = lm80_read_value(client, LM80_REG_FAN1); |
| data->fan_min[0] = |
| lm80_read_value(client, LM80_REG_FAN_MIN(1)); |
| data->fan[1] = lm80_read_value(client, LM80_REG_FAN2); |
| data->fan_min[1] = |
| lm80_read_value(client, LM80_REG_FAN_MIN(2)); |
| |
| data->temp = |
| (lm80_read_value(client, LM80_REG_TEMP) << 8) | |
| (lm80_read_value(client, LM80_REG_RES) & 0xf0); |
| data->temp_os_max = |
| lm80_read_value(client, LM80_REG_TEMP_OS_MAX); |
| data->temp_os_hyst = |
| lm80_read_value(client, LM80_REG_TEMP_OS_HYST); |
| data->temp_hot_max = |
| lm80_read_value(client, LM80_REG_TEMP_HOT_MAX); |
| data->temp_hot_hyst = |
| lm80_read_value(client, LM80_REG_TEMP_HOT_HYST); |
| |
| i = lm80_read_value(client, LM80_REG_FANDIV); |
| data->fan_div[0] = (i >> 2) & 0x03; |
| data->fan_div[1] = (i >> 4) & 0x03; |
| data->alarms = lm80_read_value(client, LM80_REG_ALARM1) + |
| (lm80_read_value(client, LM80_REG_ALARM2) << 8); |
| data->last_updated = jiffies; |
| data->valid = 1; |
| } |
| |
| up(&data->update_lock); |
| |
| return data; |
| } |
| |
| static int __init sensors_lm80_init(void) |
| { |
| return i2c_add_driver(&lm80_driver); |
| } |
| |
| static void __exit sensors_lm80_exit(void) |
| { |
| i2c_del_driver(&lm80_driver); |
| } |
| |
| MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and " |
| "Philip Edelbrock <phil@netroedge.com>"); |
| MODULE_DESCRIPTION("LM80 driver"); |
| MODULE_LICENSE("GPL"); |
| |
| module_init(sensors_lm80_init); |
| module_exit(sensors_lm80_exit); |