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drivers/hwmon/adm1025.c
18.4 KB
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/* * adm1025.c * * Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com> |
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* Copyright (C) 2003-2009 Jean Delvare <khali@linux-fr.org> |
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* * The ADM1025 is a sensor chip made by Analog Devices. It reports up to 6 * voltages (including its own power source) and up to two temperatures * (its own plus up to one external one). Voltages are scaled internally * (which is not the common way) with ratios such that the nominal value * of each voltage correspond to a register value of 192 (which means a * resolution of about 0.5% of the nominal value). Temperature values are * reported with a 1 deg resolution and a 3 deg accuracy. Complete * datasheet can be obtained from Analog's website at: |
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* http://www.onsemi.com/PowerSolutions/product.do?id=ADM1025 |
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* * This driver also supports the ADM1025A, which differs from the ADM1025 * only in that it has "open-drain VID inputs while the ADM1025 has * on-chip 100k pull-ups on the VID inputs". It doesn't make any * difference for us. * * This driver also supports the NE1619, a sensor chip made by Philips. * That chip is similar to the ADM1025A, with a few differences. The only * difference that matters to us is that the NE1619 has only two possible * addresses while the ADM1025A has a third one. Complete datasheet can be * obtained from Philips's website at: * http://www.semiconductors.philips.com/pip/NE1619DS.html * * Since the ADM1025 was the first chipset supported by this driver, most * comments will refer to this chipset, but are actually general and * concern all supported chipsets, unless mentioned otherwise. * * 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. */ |
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#include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/jiffies.h> #include <linux/i2c.h> |
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#include <linux/hwmon.h> |
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#include <linux/hwmon-sysfs.h> |
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#include <linux/hwmon-vid.h> |
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#include <linux/err.h> |
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#include <linux/mutex.h> |
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/* * Addresses to scan * ADM1025 and ADM1025A have three possible addresses: 0x2c, 0x2d and 0x2e. * NE1619 has two possible addresses: 0x2c and 0x2d. */ |
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static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; |
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enum chips { adm1025, ne1619 }; |
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/* * The ADM1025 registers */ #define ADM1025_REG_MAN_ID 0x3E |
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#define ADM1025_REG_CHIP_ID 0x3F |
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#define ADM1025_REG_CONFIG 0x40 #define ADM1025_REG_STATUS1 0x41 #define ADM1025_REG_STATUS2 0x42 #define ADM1025_REG_IN(nr) (0x20 + (nr)) #define ADM1025_REG_IN_MAX(nr) (0x2B + (nr) * 2) #define ADM1025_REG_IN_MIN(nr) (0x2C + (nr) * 2) #define ADM1025_REG_TEMP(nr) (0x26 + (nr)) #define ADM1025_REG_TEMP_HIGH(nr) (0x37 + (nr) * 2) #define ADM1025_REG_TEMP_LOW(nr) (0x38 + (nr) * 2) #define ADM1025_REG_VID 0x47 #define ADM1025_REG_VID4 0x49 /* * Conversions and various macros * The ADM1025 uses signed 8-bit values for temperatures. */ |
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static const int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 }; |
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#define IN_FROM_REG(reg,scale) (((reg) * (scale) + 96) / 192) #define IN_TO_REG(val,scale) ((val) <= 0 ? 0 : \ (val) * 192 >= (scale) * 255 ? 255 : \ ((val) * 192 + (scale)/2) / (scale)) #define TEMP_FROM_REG(reg) ((reg) * 1000) #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ (val) >= 126500 ? 127 : \ (((val) < 0 ? (val)-500 : (val)+500) / 1000)) /* * Functions declaration */ |
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static int adm1025_probe(struct i2c_client *client, const struct i2c_device_id *id); |
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static int adm1025_detect(struct i2c_client *client, |
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struct i2c_board_info *info); |
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static void adm1025_init_client(struct i2c_client *client); |
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static int adm1025_remove(struct i2c_client *client); |
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static struct adm1025_data *adm1025_update_device(struct device *dev); /* * Driver data (common to all clients) */ |
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static const struct i2c_device_id adm1025_id[] = { { "adm1025", adm1025 }, { "ne1619", ne1619 }, { } }; MODULE_DEVICE_TABLE(i2c, adm1025_id); |
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static struct i2c_driver adm1025_driver = { |
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.class = I2C_CLASS_HWMON, |
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.driver = { |
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.name = "adm1025", }, |
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.probe = adm1025_probe, .remove = adm1025_remove, .id_table = adm1025_id, .detect = adm1025_detect, |
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.address_list = normal_i2c, |
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}; /* * Client data (each client gets its own) */ struct adm1025_data { |
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struct device *hwmon_dev; |
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struct mutex update_lock; |
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char valid; /* zero until following fields are valid */ unsigned long last_updated; /* in jiffies */ u8 in[6]; /* register value */ u8 in_max[6]; /* register value */ u8 in_min[6]; /* register value */ s8 temp[2]; /* register value */ s8 temp_min[2]; /* register value */ s8 temp_max[2]; /* register value */ u16 alarms; /* register values, combined */ u8 vid; /* register values, combined */ u8 vrm; }; /* * Sysfs stuff */ |
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static ssize_t show_in(struct device *dev, struct device_attribute *attr, char *buf) { int index = to_sensor_dev_attr(attr)->index; struct adm1025_data *data = adm1025_update_device(dev); return sprintf(buf, "%u ", IN_FROM_REG(data->in[index], in_scale[index])); } static ssize_t show_in_min(struct device *dev, struct device_attribute *attr, char *buf) { int index = to_sensor_dev_attr(attr)->index; struct adm1025_data *data = adm1025_update_device(dev); return sprintf(buf, "%u ", IN_FROM_REG(data->in_min[index], in_scale[index])); } static ssize_t show_in_max(struct device *dev, struct device_attribute *attr, char *buf) { int index = to_sensor_dev_attr(attr)->index; struct adm1025_data *data = adm1025_update_device(dev); return sprintf(buf, "%u ", IN_FROM_REG(data->in_max[index], in_scale[index])); } static ssize_t show_temp(struct device *dev, struct device_attribute *attr, char *buf) { int index = to_sensor_dev_attr(attr)->index; struct adm1025_data *data = adm1025_update_device(dev); return sprintf(buf, "%d ", TEMP_FROM_REG(data->temp[index])); } static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr, char *buf) { int index = to_sensor_dev_attr(attr)->index; struct adm1025_data *data = adm1025_update_device(dev); return sprintf(buf, "%d ", TEMP_FROM_REG(data->temp_min[index])); } static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr, char *buf) { int index = to_sensor_dev_attr(attr)->index; struct adm1025_data *data = adm1025_update_device(dev); return sprintf(buf, "%d ", TEMP_FROM_REG(data->temp_max[index])); } static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int index = to_sensor_dev_attr(attr)->index; struct i2c_client *client = to_i2c_client(dev); struct adm1025_data *data = i2c_get_clientdata(client); long val = simple_strtol(buf, NULL, 10); mutex_lock(&data->update_lock); data->in_min[index] = IN_TO_REG(val, in_scale[index]); i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(index), data->in_min[index]); mutex_unlock(&data->update_lock); return count; } static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int index = to_sensor_dev_attr(attr)->index; struct i2c_client *client = to_i2c_client(dev); struct adm1025_data *data = i2c_get_clientdata(client); long val = simple_strtol(buf, NULL, 10); mutex_lock(&data->update_lock); data->in_max[index] = IN_TO_REG(val, in_scale[index]); i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(index), data->in_max[index]); mutex_unlock(&data->update_lock); return count; } |
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#define set_in(offset) \ |
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static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ show_in, NULL, offset); \ static SENSOR_DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \ show_in_min, set_in_min, offset); \ static SENSOR_DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \ show_in_max, set_in_max, offset) |
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set_in(0); set_in(1); set_in(2); set_in(3); set_in(4); set_in(5); |
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static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int index = to_sensor_dev_attr(attr)->index; struct i2c_client *client = to_i2c_client(dev); struct adm1025_data *data = i2c_get_clientdata(client); long val = simple_strtol(buf, NULL, 10); mutex_lock(&data->update_lock); data->temp_min[index] = TEMP_TO_REG(val); i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(index), data->temp_min[index]); mutex_unlock(&data->update_lock); return count; } static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int index = to_sensor_dev_attr(attr)->index; struct i2c_client *client = to_i2c_client(dev); struct adm1025_data *data = i2c_get_clientdata(client); long val = simple_strtol(buf, NULL, 10); mutex_lock(&data->update_lock); data->temp_max[index] = TEMP_TO_REG(val); i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(index), data->temp_max[index]); mutex_unlock(&data->update_lock); return count; } |
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#define set_temp(offset) \ |
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static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ show_temp, NULL, offset - 1); \ static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \ show_temp_min, set_temp_min, offset - 1); \ static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \ show_temp_max, set_temp_max, offset - 1) |
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set_temp(1); set_temp(2); |
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static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf) |
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{ struct adm1025_data *data = adm1025_update_device(dev); return sprintf(buf, "%u ", data->alarms); } static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL); |
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static ssize_t show_alarm(struct device *dev, struct device_attribute *attr, char *buf) { int bitnr = to_sensor_dev_attr(attr)->index; struct adm1025_data *data = adm1025_update_device(dev); return sprintf(buf, "%u ", (data->alarms >> bitnr) & 1); } static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 5); static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 4); static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14); |
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static ssize_t show_vid(struct device *dev, struct device_attribute *attr, char *buf) |
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{ struct adm1025_data *data = adm1025_update_device(dev); return sprintf(buf, "%u ", vid_from_reg(data->vid, data->vrm)); } |
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static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL); |
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static ssize_t show_vrm(struct device *dev, struct device_attribute *attr, char *buf) |
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{ |
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struct adm1025_data *data = dev_get_drvdata(dev); |
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return sprintf(buf, "%u ", data->vrm); } |
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static ssize_t set_vrm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
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{ |
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struct adm1025_data *data = dev_get_drvdata(dev); |
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data->vrm = simple_strtoul(buf, NULL, 10); return count; } static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm); /* * Real code */ |
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static struct attribute *adm1025_attributes[] = { |
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&sensor_dev_attr_in0_input.dev_attr.attr, &sensor_dev_attr_in1_input.dev_attr.attr, &sensor_dev_attr_in2_input.dev_attr.attr, &sensor_dev_attr_in3_input.dev_attr.attr, &sensor_dev_attr_in5_input.dev_attr.attr, &sensor_dev_attr_in0_min.dev_attr.attr, &sensor_dev_attr_in1_min.dev_attr.attr, &sensor_dev_attr_in2_min.dev_attr.attr, &sensor_dev_attr_in3_min.dev_attr.attr, &sensor_dev_attr_in5_min.dev_attr.attr, &sensor_dev_attr_in0_max.dev_attr.attr, &sensor_dev_attr_in1_max.dev_attr.attr, &sensor_dev_attr_in2_max.dev_attr.attr, &sensor_dev_attr_in3_max.dev_attr.attr, &sensor_dev_attr_in5_max.dev_attr.attr, |
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&sensor_dev_attr_in0_alarm.dev_attr.attr, &sensor_dev_attr_in1_alarm.dev_attr.attr, &sensor_dev_attr_in2_alarm.dev_attr.attr, &sensor_dev_attr_in3_alarm.dev_attr.attr, &sensor_dev_attr_in5_alarm.dev_attr.attr, |
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&sensor_dev_attr_temp1_input.dev_attr.attr, &sensor_dev_attr_temp2_input.dev_attr.attr, &sensor_dev_attr_temp1_min.dev_attr.attr, &sensor_dev_attr_temp2_min.dev_attr.attr, &sensor_dev_attr_temp1_max.dev_attr.attr, &sensor_dev_attr_temp2_max.dev_attr.attr, |
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&sensor_dev_attr_temp1_alarm.dev_attr.attr, &sensor_dev_attr_temp2_alarm.dev_attr.attr, &sensor_dev_attr_temp1_fault.dev_attr.attr, |
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&dev_attr_alarms.attr, &dev_attr_cpu0_vid.attr, &dev_attr_vrm.attr, NULL }; static const struct attribute_group adm1025_group = { .attrs = adm1025_attributes, }; |
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static struct attribute *adm1025_attributes_in4[] = { |
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&sensor_dev_attr_in4_input.dev_attr.attr, &sensor_dev_attr_in4_min.dev_attr.attr, &sensor_dev_attr_in4_max.dev_attr.attr, |
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&sensor_dev_attr_in4_alarm.dev_attr.attr, |
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NULL }; |
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static const struct attribute_group adm1025_group_in4 = { .attrs = adm1025_attributes_in4, |
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}; |
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/* Return 0 if detection is successful, -ENODEV otherwise */ |
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static int adm1025_detect(struct i2c_client *client, |
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struct i2c_board_info *info) |
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{ |
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struct i2c_adapter *adapter = client->adapter; |
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const char *name; u8 man_id, chip_id; |
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
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return -ENODEV; |
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/* Check for unused bits */ if ((i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG) & 0x80) || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS1) & 0xC0) || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS2) & 0xBC)) { dev_dbg(&adapter->dev, "ADM1025 detection failed at 0x%02x ", client->addr); return -ENODEV; |
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} |
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/* Identification */ chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID); if ((chip_id & 0xF0) != 0x20) return -ENODEV; |
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man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID); if (man_id == 0x41) |
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name = "adm1025"; |
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else if (man_id == 0xA1 && client->addr != 0x2E) |
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name = "ne1619"; |
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else return -ENODEV; |
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strlcpy(info->type, name, I2C_NAME_SIZE); |
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return 0; } |
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static int adm1025_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct adm1025_data *data; int err; u8 config; data = kzalloc(sizeof(struct adm1025_data), GFP_KERNEL); if (!data) { err = -ENOMEM; goto exit; } i2c_set_clientdata(client, data); mutex_init(&data->update_lock); |
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/* Initialize the ADM1025 chip */ |
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adm1025_init_client(client); |
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/* Register sysfs hooks */ |
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if ((err = sysfs_create_group(&client->dev.kobj, &adm1025_group))) |
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goto exit_free; |
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/* Pin 11 is either in4 (+12V) or VID4 */ |
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config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); |
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if (!(config & 0x20)) { |
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if ((err = sysfs_create_group(&client->dev.kobj, &adm1025_group_in4))) |
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goto exit_remove; } |
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data->hwmon_dev = hwmon_device_register(&client->dev); |
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if (IS_ERR(data->hwmon_dev)) { err = PTR_ERR(data->hwmon_dev); |
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goto exit_remove; |
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} return 0; |
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exit_remove: |
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sysfs_remove_group(&client->dev.kobj, &adm1025_group); sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4); |
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exit_free: kfree(data); exit: return err; } static void adm1025_init_client(struct i2c_client *client) { u8 reg; struct adm1025_data *data = i2c_get_clientdata(client); int i; |
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data->vrm = vid_which_vrm(); |
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/* * Set high limits * Usually we avoid setting limits on driver init, but it happens * that the ADM1025 comes with stupid default limits (all registers * set to 0). In case the chip has not gone through any limit * setting yet, we better set the high limits to the max so that * no alarm triggers. */ for (i=0; i<6; i++) { reg = i2c_smbus_read_byte_data(client, ADM1025_REG_IN_MAX(i)); if (reg == 0) i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(i), 0xFF); } for (i=0; i<2; i++) { reg = i2c_smbus_read_byte_data(client, ADM1025_REG_TEMP_HIGH(i)); if (reg == 0) i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(i), 0x7F); } /* * Start the conversions */ reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); if (!(reg & 0x01)) i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG, (reg&0x7E)|0x01); } |
7dbafe021
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524 |
static int adm1025_remove(struct i2c_client *client) |
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525 |
{ |
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struct adm1025_data *data = i2c_get_clientdata(client); |
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|
527 |
|
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hwmon_device_unregister(data->hwmon_dev); |
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sysfs_remove_group(&client->dev.kobj, &adm1025_group); |
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sysfs_remove_group(&client->dev.kobj, &adm1025_group_in4); |
943b0830c
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531 |
|
943b0830c
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532 |
kfree(data); |
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return 0; } static struct adm1025_data *adm1025_update_device(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct adm1025_data *data = i2c_get_clientdata(client); |
9a61bf630
|
540 |
mutex_lock(&data->update_lock); |
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if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { int i; dev_dbg(&client->dev, "Updating data. "); for (i=0; i<6; i++) { data->in[i] = i2c_smbus_read_byte_data(client, ADM1025_REG_IN(i)); data->in_min[i] = i2c_smbus_read_byte_data(client, ADM1025_REG_IN_MIN(i)); data->in_max[i] = i2c_smbus_read_byte_data(client, ADM1025_REG_IN_MAX(i)); } for (i=0; i<2; i++) { data->temp[i] = i2c_smbus_read_byte_data(client, ADM1025_REG_TEMP(i)); data->temp_min[i] = i2c_smbus_read_byte_data(client, ADM1025_REG_TEMP_LOW(i)); data->temp_max[i] = i2c_smbus_read_byte_data(client, ADM1025_REG_TEMP_HIGH(i)); } data->alarms = i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS1) | (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS2) << 8); data->vid = (i2c_smbus_read_byte_data(client, ADM1025_REG_VID) & 0x0f) | ((i2c_smbus_read_byte_data(client, ADM1025_REG_VID4) & 0x01) << 4); data->last_updated = jiffies; data->valid = 1; } |
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mutex_unlock(&data->update_lock); |
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return data; } static int __init sensors_adm1025_init(void) { return i2c_add_driver(&adm1025_driver); } static void __exit sensors_adm1025_exit(void) { i2c_del_driver(&adm1025_driver); } MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>"); MODULE_DESCRIPTION("ADM1025 driver"); MODULE_LICENSE("GPL"); module_init(sensors_adm1025_init); module_exit(sensors_adm1025_exit); |