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adm1031.c - Part of lm_sensors, Linux kernel modules for hardware
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Based on lm75.c and lm85.c
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Supports adm1030 / adm1031
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Copyright (C) 2004 Alexandre d'Alton <alex@alexdalton.org>
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Reworked by Jean Delvare <khali@linux-fr.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#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/err.h>
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#include <linux/mutex.h>
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/* Following macros takes channel parameter starting from 0 to 2 */
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#define ADM1031_REG_FAN_SPEED(nr) (0x08 + (nr))
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#define ADM1031_REG_FAN_DIV(nr) (0x20 + (nr))
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#define ADM1031_REG_PWM (0x22)
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#define ADM1031_REG_FAN_MIN(nr) (0x10 + (nr))
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#define ADM1031_REG_FAN_FILTER (0x23)
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#define ADM1031_REG_TEMP_OFFSET(nr) (0x0d + (nr))
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#define ADM1031_REG_TEMP_MAX(nr) (0x14 + 4 * (nr))
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#define ADM1031_REG_TEMP_MIN(nr) (0x15 + 4 * (nr))
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#define ADM1031_REG_TEMP_CRIT(nr) (0x16 + 4 * (nr))
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#define ADM1031_REG_TEMP(nr) (0x0a + (nr))
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#define ADM1031_REG_AUTO_TEMP(nr) (0x24 + (nr))
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#define ADM1031_REG_STATUS(nr) (0x2 + (nr))
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#define ADM1031_REG_CONF1 0x00
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#define ADM1031_REG_CONF2 0x01
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#define ADM1031_REG_EXT_TEMP 0x06
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#define ADM1031_CONF1_MONITOR_ENABLE 0x01 /* Monitoring enable */
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#define ADM1031_CONF1_PWM_INVERT 0x08 /* PWM Invert */
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#define ADM1031_CONF1_AUTO_MODE 0x80 /* Auto FAN */
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#define ADM1031_CONF2_PWM1_ENABLE 0x01
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#define ADM1031_CONF2_PWM2_ENABLE 0x02
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#define ADM1031_CONF2_TACH1_ENABLE 0x04
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#define ADM1031_CONF2_TACH2_ENABLE 0x08
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#define ADM1031_CONF2_TEMP_ENABLE(chan) (0x10 << (chan))
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#define ADM1031_UPDATE_RATE_MASK 0x1c
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#define ADM1031_UPDATE_RATE_SHIFT 2
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/* Addresses to scan */
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static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
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enum chips { adm1030, adm1031 };
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typedef u8 auto_chan_table_t[8][2];
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/* Each client has this additional data */
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struct device *hwmon_dev;
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struct mutex update_lock;
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char valid; /* !=0 if following fields are valid */
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unsigned long last_updated; /* In jiffies */
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unsigned int update_interval; /* In milliseconds */
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/* The chan_select_table contains the possible configurations for
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const auto_chan_table_t *chan_select_table;
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static int adm1031_probe(struct i2c_client *client,
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const struct i2c_device_id *id);
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static int adm1031_detect(struct i2c_client *client,
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struct i2c_board_info *info);
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static void adm1031_init_client(struct i2c_client *client);
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static int adm1031_remove(struct i2c_client *client);
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static struct adm1031_data *adm1031_update_device(struct device *dev);
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static const struct i2c_device_id adm1031_id[] = {
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{ "adm1030", adm1030 },
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{ "adm1031", adm1031 },
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MODULE_DEVICE_TABLE(i2c, adm1031_id);
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/* This is the driver that will be inserted */
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static struct i2c_driver adm1031_driver = {
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.class = I2C_CLASS_HWMON,
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.probe = adm1031_probe,
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.remove = adm1031_remove,
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.id_table = adm1031_id,
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.detect = adm1031_detect,
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.address_list = normal_i2c,
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static inline u8 adm1031_read_value(struct i2c_client *client, u8 reg)
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return i2c_smbus_read_byte_data(client, reg);
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adm1031_write_value(struct i2c_client *client, u8 reg, unsigned int value)
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return i2c_smbus_write_byte_data(client, reg, value);
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#define TEMP_TO_REG(val) (((val) < 0 ? ((val - 500) / 1000) : \
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((val + 500) / 1000)))
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#define TEMP_FROM_REG(val) ((val) * 1000)
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#define TEMP_FROM_REG_EXT(val, ext) (TEMP_FROM_REG(val) + (ext) * 125)
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#define TEMP_OFFSET_TO_REG(val) (TEMP_TO_REG(val) & 0x8f)
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#define TEMP_OFFSET_FROM_REG(val) TEMP_FROM_REG((val) < 0 ? \
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(val) | 0x70 : (val))
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#define FAN_FROM_REG(reg, div) ((reg) ? (11250 * 60) / ((reg) * (div)) : 0)
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static int FAN_TO_REG(int reg, int div)
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tmp = FAN_FROM_REG(SENSORS_LIMIT(reg, 0, 65535), div);
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return tmp > 255 ? 255 : tmp;
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#define FAN_DIV_FROM_REG(reg) (1<<(((reg)&0xc0)>>6))
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#define PWM_TO_REG(val) (SENSORS_LIMIT((val), 0, 255) >> 4)
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#define PWM_FROM_REG(val) ((val) << 4)
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#define FAN_CHAN_FROM_REG(reg) (((reg) >> 5) & 7)
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#define FAN_CHAN_TO_REG(val, reg) \
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(((reg) & 0x1F) | (((val) << 5) & 0xe0))
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#define AUTO_TEMP_MIN_TO_REG(val, reg) \
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((((val)/500) & 0xf8)|((reg) & 0x7))
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#define AUTO_TEMP_RANGE_FROM_REG(reg) (5000 * (1<< ((reg)&0x7)))
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#define AUTO_TEMP_MIN_FROM_REG(reg) (1000 * ((((reg) >> 3) & 0x1f) << 2))
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#define AUTO_TEMP_MIN_FROM_REG_DEG(reg) ((((reg) >> 3) & 0x1f) << 2)
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#define AUTO_TEMP_OFF_FROM_REG(reg) \
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(AUTO_TEMP_MIN_FROM_REG(reg) - 5000)
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#define AUTO_TEMP_MAX_FROM_REG(reg) \
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(AUTO_TEMP_RANGE_FROM_REG(reg) + \
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AUTO_TEMP_MIN_FROM_REG(reg))
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static int AUTO_TEMP_MAX_TO_REG(int val, int reg, int pwm)
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int range = val - AUTO_TEMP_MIN_FROM_REG(reg);
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range = ((val - AUTO_TEMP_MIN_FROM_REG(reg))*10)/(16 - pwm);
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ret = ((reg & 0xf8) |
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range < 40000 ? 2 : range < 80000 ? 3 : 4));
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/* FAN auto control */
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#define GET_FAN_AUTO_BITFIELD(data, idx) \
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(*(data)->chan_select_table)[FAN_CHAN_FROM_REG((data)->conf1)][idx%2]
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/* The tables below contains the possible values for the auto fan
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* control bitfields. the index in the table is the register value.
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* MSb is the auto fan control enable bit, so the four first entries
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* in the table disables auto fan control when both bitfields are zero.
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static const auto_chan_table_t auto_channel_select_table_adm1031 = {
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{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
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{ 2 /* 0b010 */ , 4 /* 0b100 */ },
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{ 2 /* 0b010 */ , 2 /* 0b010 */ },
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{ 4 /* 0b100 */ , 4 /* 0b100 */ },
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{ 7 /* 0b111 */ , 7 /* 0b111 */ },
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static const auto_chan_table_t auto_channel_select_table_adm1030 = {
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{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
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{ 2 /* 0b10 */ , 0 },
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{ 0xff /* invalid */ , 0 },
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{ 0xff /* invalid */ , 0 },
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{ 3 /* 0b11 */ , 0 },
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/* That function checks if a bitfield is valid and returns the other bitfield
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* nearest match if no exact match where found.
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get_fan_auto_nearest(struct adm1031_data *data,
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int chan, u8 val, u8 reg, u8 * new_reg)
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int first_match = -1, exact_match = -1;
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(*data->chan_select_table)[FAN_CHAN_FROM_REG(reg)][chan ? 0 : 1];
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for (i = 0; i < 8; i++) {
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if ((val == (*data->chan_select_table)[i][chan]) &&
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((*data->chan_select_table)[i][chan ? 0 : 1] ==
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/* We found an exact match */
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} else if (val == (*data->chan_select_table)[i][chan] &&
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/* Save the first match in case of an exact match has
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if (exact_match >= 0) {
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*new_reg = exact_match;
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} else if (first_match >= 0) {
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*new_reg = first_match;
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static ssize_t show_fan_auto_channel(struct device *dev,
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struct device_attribute *attr, char *buf)
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int nr = to_sensor_dev_attr(attr)->index;
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struct adm1031_data *data = adm1031_update_device(dev);
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return sprintf(buf, "%d\n", GET_FAN_AUTO_BITFIELD(data, nr));
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set_fan_auto_channel(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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struct i2c_client *client = to_i2c_client(dev);
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struct adm1031_data *data = i2c_get_clientdata(client);
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int nr = to_sensor_dev_attr(attr)->index;
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int val = simple_strtol(buf, NULL, 10);
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old_fan_mode = data->conf1;
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mutex_lock(&data->update_lock);
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if ((ret = get_fan_auto_nearest(data, nr, val, data->conf1, ®))) {
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mutex_unlock(&data->update_lock);
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data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1);
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if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) ^
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(old_fan_mode & ADM1031_CONF1_AUTO_MODE)) {
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if (data->conf1 & ADM1031_CONF1_AUTO_MODE){
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/* Switch to Auto Fan Mode
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* Set PWM registers to 33% Both */
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data->old_pwm[0] = data->pwm[0];
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data->old_pwm[1] = data->pwm[1];
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adm1031_write_value(client, ADM1031_REG_PWM, 0x55);
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/* Switch to Manual Mode */
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data->pwm[0] = data->old_pwm[0];
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data->pwm[1] = data->old_pwm[1];
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/* Restore PWM registers */
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adm1031_write_value(client, ADM1031_REG_PWM,
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data->pwm[0] | (data->pwm[1] << 4));
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data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1);
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adm1031_write_value(client, ADM1031_REG_CONF1, data->conf1);
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mutex_unlock(&data->update_lock);
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static SENSOR_DEVICE_ATTR(auto_fan1_channel, S_IRUGO | S_IWUSR,
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show_fan_auto_channel, set_fan_auto_channel, 0);
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static SENSOR_DEVICE_ATTR(auto_fan2_channel, S_IRUGO | S_IWUSR,
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show_fan_auto_channel, set_fan_auto_channel, 1);
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static ssize_t show_auto_temp_off(struct device *dev,
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struct device_attribute *attr, char *buf)
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int nr = to_sensor_dev_attr(attr)->index;
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struct adm1031_data *data = adm1031_update_device(dev);
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return sprintf(buf, "%d\n",
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AUTO_TEMP_OFF_FROM_REG(data->auto_temp[nr]));
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static ssize_t show_auto_temp_min(struct device *dev,
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struct device_attribute *attr, char *buf)
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int nr = to_sensor_dev_attr(attr)->index;
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struct adm1031_data *data = adm1031_update_device(dev);
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return sprintf(buf, "%d\n",
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AUTO_TEMP_MIN_FROM_REG(data->auto_temp[nr]));
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set_auto_temp_min(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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struct i2c_client *client = to_i2c_client(dev);
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struct adm1031_data *data = i2c_get_clientdata(client);
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int nr = to_sensor_dev_attr(attr)->index;
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int val = simple_strtol(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->auto_temp[nr] = AUTO_TEMP_MIN_TO_REG(val, data->auto_temp[nr]);
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adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
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data->auto_temp[nr]);
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mutex_unlock(&data->update_lock);
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static ssize_t show_auto_temp_max(struct device *dev,
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struct device_attribute *attr, char *buf)
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int nr = to_sensor_dev_attr(attr)->index;
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struct adm1031_data *data = adm1031_update_device(dev);
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return sprintf(buf, "%d\n",
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AUTO_TEMP_MAX_FROM_REG(data->auto_temp[nr]));
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set_auto_temp_max(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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struct i2c_client *client = to_i2c_client(dev);
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struct adm1031_data *data = i2c_get_clientdata(client);
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int nr = to_sensor_dev_attr(attr)->index;
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int val = simple_strtol(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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data->temp_max[nr] = AUTO_TEMP_MAX_TO_REG(val, data->auto_temp[nr], data->pwm[nr]);
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adm1031_write_value(client, ADM1031_REG_AUTO_TEMP(nr),
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mutex_unlock(&data->update_lock);
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#define auto_temp_reg(offset) \
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static SENSOR_DEVICE_ATTR(auto_temp##offset##_off, S_IRUGO, \
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show_auto_temp_off, NULL, offset - 1); \
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static SENSOR_DEVICE_ATTR(auto_temp##offset##_min, S_IRUGO | S_IWUSR, \
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show_auto_temp_min, set_auto_temp_min, offset - 1); \
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static SENSOR_DEVICE_ATTR(auto_temp##offset##_max, S_IRUGO | S_IWUSR, \
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show_auto_temp_max, set_auto_temp_max, offset - 1)
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static ssize_t show_pwm(struct device *dev,
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struct device_attribute *attr, char *buf)
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int nr = to_sensor_dev_attr(attr)->index;
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struct adm1031_data *data = adm1031_update_device(dev);
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return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr]));
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static ssize_t set_pwm(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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struct i2c_client *client = to_i2c_client(dev);
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struct adm1031_data *data = i2c_get_clientdata(client);
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int nr = to_sensor_dev_attr(attr)->index;
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int val = simple_strtol(buf, NULL, 10);
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mutex_lock(&data->update_lock);
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if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) &&
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(((val>>4) & 0xf) != 5)) {
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/* In automatic mode, the only PWM accepted is 33% */
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mutex_unlock(&data->update_lock);
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data->pwm[nr] = PWM_TO_REG(val);
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reg = adm1031_read_value(client, ADM1031_REG_PWM);
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adm1031_write_value(client, ADM1031_REG_PWM,
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nr ? ((data->pwm[nr] << 4) & 0xf0) | (reg & 0xf)
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: (data->pwm[nr] & 0xf) | (reg & 0xf0));
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mutex_unlock(&data->update_lock);
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static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 0);
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static SENSOR_DEVICE_ATTR(pwm2, S_IRUGO | S_IWUSR, show_pwm, set_pwm, 1);
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static SENSOR_DEVICE_ATTR(auto_fan1_min_pwm, S_IRUGO | S_IWUSR,
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show_pwm, set_pwm, 0);
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static SENSOR_DEVICE_ATTR(auto_fan2_min_pwm, S_IRUGO | S_IWUSR,
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show_pwm, set_pwm, 1);
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* That function checks the cases where the fan reading is not
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* relevant. It is used to provide 0 as fan reading when the fan is
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* not supposed to run
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static int trust_fan_readings(struct adm1031_data *data, int chan)
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if (data->conf1 & ADM1031_CONF1_AUTO_MODE) {
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switch (data->conf1 & 0x60) {
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case 0x00: /* remote temp1 controls fan1 remote temp2 controls fan2 */
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res = data->temp[chan+1] >=
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AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[chan+1]);
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case 0x20: /* remote temp1 controls both fans */
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AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1]);
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case 0x40: /* remote temp2 controls both fans */
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AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]);
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case 0x60: /* max controls both fans */
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AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[0])
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AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1])
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|| (data->chip_type == adm1031
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AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]));
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res = data->pwm[chan] > 0;
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static ssize_t show_fan(struct device *dev,
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struct device_attribute *attr, char *buf)
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int nr = to_sensor_dev_attr(attr)->index;
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struct adm1031_data *data = adm1031_update_device(dev);
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value = trust_fan_readings(data, nr) ? FAN_FROM_REG(data->fan[nr],
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FAN_DIV_FROM_REG(data->fan_div[nr])) : 0;
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return sprintf(buf, "%d\n", value);
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static ssize_t show_fan_div(struct device *dev,
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struct device_attribute *attr, char *buf)
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int nr = to_sensor_dev_attr(attr)->index;
500
struct adm1031_data *data = adm1031_update_device(dev);
501
return sprintf(buf, "%d\n", FAN_DIV_FROM_REG(data->fan_div[nr]));
503
static ssize_t show_fan_min(struct device *dev,
504
struct device_attribute *attr, char *buf)
506
int nr = to_sensor_dev_attr(attr)->index;
507
struct adm1031_data *data = adm1031_update_device(dev);
508
return sprintf(buf, "%d\n",
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FAN_FROM_REG(data->fan_min[nr],
510
FAN_DIV_FROM_REG(data->fan_div[nr])));
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static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
513
const char *buf, size_t count)
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struct i2c_client *client = to_i2c_client(dev);
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struct adm1031_data *data = i2c_get_clientdata(client);
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int nr = to_sensor_dev_attr(attr)->index;
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int val = simple_strtol(buf, NULL, 10);
520
mutex_lock(&data->update_lock);
523
FAN_TO_REG(val, FAN_DIV_FROM_REG(data->fan_div[nr]));
525
data->fan_min[nr] = 0xff;
527
adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr), data->fan_min[nr]);
528
mutex_unlock(&data->update_lock);
531
static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
532
const char *buf, size_t count)
534
struct i2c_client *client = to_i2c_client(dev);
535
struct adm1031_data *data = i2c_get_clientdata(client);
536
int nr = to_sensor_dev_attr(attr)->index;
537
int val = simple_strtol(buf, NULL, 10);
542
tmp = val == 8 ? 0xc0 :
550
mutex_lock(&data->update_lock);
551
/* Get fresh readings */
552
data->fan_div[nr] = adm1031_read_value(client,
553
ADM1031_REG_FAN_DIV(nr));
554
data->fan_min[nr] = adm1031_read_value(client,
555
ADM1031_REG_FAN_MIN(nr));
557
/* Write the new clock divider and fan min */
558
old_div = FAN_DIV_FROM_REG(data->fan_div[nr]);
559
data->fan_div[nr] = tmp | (0x3f & data->fan_div[nr]);
560
new_min = data->fan_min[nr] * old_div / val;
561
data->fan_min[nr] = new_min > 0xff ? 0xff : new_min;
563
adm1031_write_value(client, ADM1031_REG_FAN_DIV(nr),
565
adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr),
568
/* Invalidate the cache: fan speed is no longer valid */
570
mutex_unlock(&data->update_lock);
574
#define fan_offset(offset) \
575
static SENSOR_DEVICE_ATTR(fan##offset##_input, S_IRUGO, \
576
show_fan, NULL, offset - 1); \
577
static SENSOR_DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
578
show_fan_min, set_fan_min, offset - 1); \
579
static SENSOR_DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \
580
show_fan_div, set_fan_div, offset - 1)
587
static ssize_t show_temp(struct device *dev,
588
struct device_attribute *attr, char *buf)
590
int nr = to_sensor_dev_attr(attr)->index;
591
struct adm1031_data *data = adm1031_update_device(dev);
594
((data->ext_temp[nr] >> 6) & 0x3) * 2 :
595
(((data->ext_temp[nr] >> ((nr - 1) * 3)) & 7));
596
return sprintf(buf, "%d\n", TEMP_FROM_REG_EXT(data->temp[nr], ext));
598
static ssize_t show_temp_offset(struct device *dev,
599
struct device_attribute *attr, char *buf)
601
int nr = to_sensor_dev_attr(attr)->index;
602
struct adm1031_data *data = adm1031_update_device(dev);
603
return sprintf(buf, "%d\n",
604
TEMP_OFFSET_FROM_REG(data->temp_offset[nr]));
606
static ssize_t show_temp_min(struct device *dev,
607
struct device_attribute *attr, char *buf)
609
int nr = to_sensor_dev_attr(attr)->index;
610
struct adm1031_data *data = adm1031_update_device(dev);
611
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
613
static ssize_t show_temp_max(struct device *dev,
614
struct device_attribute *attr, char *buf)
616
int nr = to_sensor_dev_attr(attr)->index;
617
struct adm1031_data *data = adm1031_update_device(dev);
618
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
620
static ssize_t show_temp_crit(struct device *dev,
621
struct device_attribute *attr, char *buf)
623
int nr = to_sensor_dev_attr(attr)->index;
624
struct adm1031_data *data = adm1031_update_device(dev);
625
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit[nr]));
627
static ssize_t set_temp_offset(struct device *dev,
628
struct device_attribute *attr, const char *buf,
631
struct i2c_client *client = to_i2c_client(dev);
632
struct adm1031_data *data = i2c_get_clientdata(client);
633
int nr = to_sensor_dev_attr(attr)->index;
636
val = simple_strtol(buf, NULL, 10);
637
val = SENSORS_LIMIT(val, -15000, 15000);
638
mutex_lock(&data->update_lock);
639
data->temp_offset[nr] = TEMP_OFFSET_TO_REG(val);
640
adm1031_write_value(client, ADM1031_REG_TEMP_OFFSET(nr),
641
data->temp_offset[nr]);
642
mutex_unlock(&data->update_lock);
645
static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
646
const char *buf, size_t count)
648
struct i2c_client *client = to_i2c_client(dev);
649
struct adm1031_data *data = i2c_get_clientdata(client);
650
int nr = to_sensor_dev_attr(attr)->index;
653
val = simple_strtol(buf, NULL, 10);
654
val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
655
mutex_lock(&data->update_lock);
656
data->temp_min[nr] = TEMP_TO_REG(val);
657
adm1031_write_value(client, ADM1031_REG_TEMP_MIN(nr),
659
mutex_unlock(&data->update_lock);
662
static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
663
const char *buf, size_t count)
665
struct i2c_client *client = to_i2c_client(dev);
666
struct adm1031_data *data = i2c_get_clientdata(client);
667
int nr = to_sensor_dev_attr(attr)->index;
670
val = simple_strtol(buf, NULL, 10);
671
val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
672
mutex_lock(&data->update_lock);
673
data->temp_max[nr] = TEMP_TO_REG(val);
674
adm1031_write_value(client, ADM1031_REG_TEMP_MAX(nr),
676
mutex_unlock(&data->update_lock);
679
static ssize_t set_temp_crit(struct device *dev, struct device_attribute *attr,
680
const char *buf, size_t count)
682
struct i2c_client *client = to_i2c_client(dev);
683
struct adm1031_data *data = i2c_get_clientdata(client);
684
int nr = to_sensor_dev_attr(attr)->index;
687
val = simple_strtol(buf, NULL, 10);
688
val = SENSORS_LIMIT(val, -55000, nr == 0 ? 127750 : 127875);
689
mutex_lock(&data->update_lock);
690
data->temp_crit[nr] = TEMP_TO_REG(val);
691
adm1031_write_value(client, ADM1031_REG_TEMP_CRIT(nr),
692
data->temp_crit[nr]);
693
mutex_unlock(&data->update_lock);
697
#define temp_reg(offset) \
698
static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
699
show_temp, NULL, offset - 1); \
700
static SENSOR_DEVICE_ATTR(temp##offset##_offset, S_IRUGO | S_IWUSR, \
701
show_temp_offset, set_temp_offset, offset - 1); \
702
static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
703
show_temp_min, set_temp_min, offset - 1); \
704
static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
705
show_temp_max, set_temp_max, offset - 1); \
706
static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO | S_IWUSR, \
707
show_temp_crit, set_temp_crit, offset - 1)
714
static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
716
struct adm1031_data *data = adm1031_update_device(dev);
717
return sprintf(buf, "%d\n", data->alarm);
720
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
722
static ssize_t show_alarm(struct device *dev,
723
struct device_attribute *attr, char *buf)
725
int bitnr = to_sensor_dev_attr(attr)->index;
726
struct adm1031_data *data = adm1031_update_device(dev);
727
return sprintf(buf, "%d\n", (data->alarm >> bitnr) & 1);
730
static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 0);
731
static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_alarm, NULL, 1);
732
static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 2);
733
static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
734
static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 4);
735
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 5);
736
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
737
static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 7);
738
static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 8);
739
static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_alarm, NULL, 9);
740
static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 10);
741
static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_alarm, NULL, 11);
742
static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 12);
743
static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 13);
744
static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 14);
746
/* Update Interval */
747
static const unsigned int update_intervals[] = {
748
16000, 8000, 4000, 2000, 1000, 500, 250, 125,
751
static ssize_t show_update_interval(struct device *dev,
752
struct device_attribute *attr, char *buf)
754
struct i2c_client *client = to_i2c_client(dev);
755
struct adm1031_data *data = i2c_get_clientdata(client);
757
return sprintf(buf, "%u\n", data->update_interval);
760
static ssize_t set_update_interval(struct device *dev,
761
struct device_attribute *attr,
762
const char *buf, size_t count)
764
struct i2c_client *client = to_i2c_client(dev);
765
struct adm1031_data *data = i2c_get_clientdata(client);
770
err = strict_strtoul(buf, 10, &val);
775
* Find the nearest update interval from the table.
776
* Use it to determine the matching update rate.
778
for (i = 0; i < ARRAY_SIZE(update_intervals) - 1; i++) {
779
if (val >= update_intervals[i])
782
/* if not found, we point to the last entry (lowest update interval) */
784
/* set the new update rate while preserving other settings */
785
reg = adm1031_read_value(client, ADM1031_REG_FAN_FILTER);
786
reg &= ~ADM1031_UPDATE_RATE_MASK;
787
reg |= i << ADM1031_UPDATE_RATE_SHIFT;
788
adm1031_write_value(client, ADM1031_REG_FAN_FILTER, reg);
790
mutex_lock(&data->update_lock);
791
data->update_interval = update_intervals[i];
792
mutex_unlock(&data->update_lock);
797
static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
798
set_update_interval);
800
static struct attribute *adm1031_attributes[] = {
801
&sensor_dev_attr_fan1_input.dev_attr.attr,
802
&sensor_dev_attr_fan1_div.dev_attr.attr,
803
&sensor_dev_attr_fan1_min.dev_attr.attr,
804
&sensor_dev_attr_fan1_alarm.dev_attr.attr,
805
&sensor_dev_attr_fan1_fault.dev_attr.attr,
806
&sensor_dev_attr_pwm1.dev_attr.attr,
807
&sensor_dev_attr_auto_fan1_channel.dev_attr.attr,
808
&sensor_dev_attr_temp1_input.dev_attr.attr,
809
&sensor_dev_attr_temp1_offset.dev_attr.attr,
810
&sensor_dev_attr_temp1_min.dev_attr.attr,
811
&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
812
&sensor_dev_attr_temp1_max.dev_attr.attr,
813
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
814
&sensor_dev_attr_temp1_crit.dev_attr.attr,
815
&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
816
&sensor_dev_attr_temp2_input.dev_attr.attr,
817
&sensor_dev_attr_temp2_offset.dev_attr.attr,
818
&sensor_dev_attr_temp2_min.dev_attr.attr,
819
&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
820
&sensor_dev_attr_temp2_max.dev_attr.attr,
821
&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
822
&sensor_dev_attr_temp2_crit.dev_attr.attr,
823
&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
824
&sensor_dev_attr_temp2_fault.dev_attr.attr,
826
&sensor_dev_attr_auto_temp1_off.dev_attr.attr,
827
&sensor_dev_attr_auto_temp1_min.dev_attr.attr,
828
&sensor_dev_attr_auto_temp1_max.dev_attr.attr,
830
&sensor_dev_attr_auto_temp2_off.dev_attr.attr,
831
&sensor_dev_attr_auto_temp2_min.dev_attr.attr,
832
&sensor_dev_attr_auto_temp2_max.dev_attr.attr,
834
&sensor_dev_attr_auto_fan1_min_pwm.dev_attr.attr,
836
&dev_attr_update_interval.attr,
837
&dev_attr_alarms.attr,
842
static const struct attribute_group adm1031_group = {
843
.attrs = adm1031_attributes,
846
static struct attribute *adm1031_attributes_opt[] = {
847
&sensor_dev_attr_fan2_input.dev_attr.attr,
848
&sensor_dev_attr_fan2_div.dev_attr.attr,
849
&sensor_dev_attr_fan2_min.dev_attr.attr,
850
&sensor_dev_attr_fan2_alarm.dev_attr.attr,
851
&sensor_dev_attr_fan2_fault.dev_attr.attr,
852
&sensor_dev_attr_pwm2.dev_attr.attr,
853
&sensor_dev_attr_auto_fan2_channel.dev_attr.attr,
854
&sensor_dev_attr_temp3_input.dev_attr.attr,
855
&sensor_dev_attr_temp3_offset.dev_attr.attr,
856
&sensor_dev_attr_temp3_min.dev_attr.attr,
857
&sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
858
&sensor_dev_attr_temp3_max.dev_attr.attr,
859
&sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
860
&sensor_dev_attr_temp3_crit.dev_attr.attr,
861
&sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
862
&sensor_dev_attr_temp3_fault.dev_attr.attr,
863
&sensor_dev_attr_auto_temp3_off.dev_attr.attr,
864
&sensor_dev_attr_auto_temp3_min.dev_attr.attr,
865
&sensor_dev_attr_auto_temp3_max.dev_attr.attr,
866
&sensor_dev_attr_auto_fan2_min_pwm.dev_attr.attr,
870
static const struct attribute_group adm1031_group_opt = {
871
.attrs = adm1031_attributes_opt,
874
/* Return 0 if detection is successful, -ENODEV otherwise */
875
static int adm1031_detect(struct i2c_client *client,
876
struct i2c_board_info *info)
878
struct i2c_adapter *adapter = client->adapter;
882
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
885
id = i2c_smbus_read_byte_data(client, 0x3d);
886
co = i2c_smbus_read_byte_data(client, 0x3e);
888
if (!((id == 0x31 || id == 0x30) && co == 0x41))
890
name = (id == 0x30) ? "adm1030" : "adm1031";
892
strlcpy(info->type, name, I2C_NAME_SIZE);
897
static int adm1031_probe(struct i2c_client *client,
898
const struct i2c_device_id *id)
900
struct adm1031_data *data;
903
data = kzalloc(sizeof(struct adm1031_data), GFP_KERNEL);
909
i2c_set_clientdata(client, data);
910
data->chip_type = id->driver_data;
911
mutex_init(&data->update_lock);
913
if (data->chip_type == adm1030)
914
data->chan_select_table = &auto_channel_select_table_adm1030;
916
data->chan_select_table = &auto_channel_select_table_adm1031;
918
/* Initialize the ADM1031 chip */
919
adm1031_init_client(client);
921
/* Register sysfs hooks */
922
if ((err = sysfs_create_group(&client->dev.kobj, &adm1031_group)))
925
if (data->chip_type == adm1031) {
926
if ((err = sysfs_create_group(&client->dev.kobj,
927
&adm1031_group_opt)))
931
data->hwmon_dev = hwmon_device_register(&client->dev);
932
if (IS_ERR(data->hwmon_dev)) {
933
err = PTR_ERR(data->hwmon_dev);
940
sysfs_remove_group(&client->dev.kobj, &adm1031_group);
941
sysfs_remove_group(&client->dev.kobj, &adm1031_group_opt);
948
static int adm1031_remove(struct i2c_client *client)
950
struct adm1031_data *data = i2c_get_clientdata(client);
952
hwmon_device_unregister(data->hwmon_dev);
953
sysfs_remove_group(&client->dev.kobj, &adm1031_group);
954
sysfs_remove_group(&client->dev.kobj, &adm1031_group_opt);
959
static void adm1031_init_client(struct i2c_client *client)
961
unsigned int read_val;
964
struct adm1031_data *data = i2c_get_clientdata(client);
966
mask = (ADM1031_CONF2_PWM1_ENABLE | ADM1031_CONF2_TACH1_ENABLE);
967
if (data->chip_type == adm1031) {
968
mask |= (ADM1031_CONF2_PWM2_ENABLE |
969
ADM1031_CONF2_TACH2_ENABLE);
971
/* Initialize the ADM1031 chip (enables fan speed reading ) */
972
read_val = adm1031_read_value(client, ADM1031_REG_CONF2);
973
if ((read_val | mask) != read_val) {
974
adm1031_write_value(client, ADM1031_REG_CONF2, read_val | mask);
977
read_val = adm1031_read_value(client, ADM1031_REG_CONF1);
978
if ((read_val | ADM1031_CONF1_MONITOR_ENABLE) != read_val) {
979
adm1031_write_value(client, ADM1031_REG_CONF1, read_val |
980
ADM1031_CONF1_MONITOR_ENABLE);
983
/* Read the chip's update rate */
984
mask = ADM1031_UPDATE_RATE_MASK;
985
read_val = adm1031_read_value(client, ADM1031_REG_FAN_FILTER);
986
i = (read_val & mask) >> ADM1031_UPDATE_RATE_SHIFT;
987
/* Save it as update interval */
988
data->update_interval = update_intervals[i];
991
static struct adm1031_data *adm1031_update_device(struct device *dev)
993
struct i2c_client *client = to_i2c_client(dev);
994
struct adm1031_data *data = i2c_get_clientdata(client);
995
unsigned long next_update;
998
mutex_lock(&data->update_lock);
1000
next_update = data->last_updated
1001
+ msecs_to_jiffies(data->update_interval);
1002
if (time_after(jiffies, next_update) || !data->valid) {
1004
dev_dbg(&client->dev, "Starting adm1031 update\n");
1006
chan < ((data->chip_type == adm1031) ? 3 : 2); chan++) {
1010
adm1031_read_value(client, ADM1031_REG_TEMP(chan));
1011
data->ext_temp[chan] =
1012
adm1031_read_value(client, ADM1031_REG_EXT_TEMP);
1014
adm1031_read_value(client, ADM1031_REG_TEMP(chan));
1016
data->ext_temp[chan] =
1017
adm1031_read_value(client,
1018
ADM1031_REG_EXT_TEMP);
1021
adm1031_read_value(client,
1022
ADM1031_REG_TEMP(chan));
1024
/* oldh is actually newer */
1026
dev_warn(&client->dev,
1027
"Remote temperature may be "
1031
data->temp[chan] = newh;
1033
data->temp_offset[chan] =
1034
adm1031_read_value(client,
1035
ADM1031_REG_TEMP_OFFSET(chan));
1036
data->temp_min[chan] =
1037
adm1031_read_value(client,
1038
ADM1031_REG_TEMP_MIN(chan));
1039
data->temp_max[chan] =
1040
adm1031_read_value(client,
1041
ADM1031_REG_TEMP_MAX(chan));
1042
data->temp_crit[chan] =
1043
adm1031_read_value(client,
1044
ADM1031_REG_TEMP_CRIT(chan));
1045
data->auto_temp[chan] =
1046
adm1031_read_value(client,
1047
ADM1031_REG_AUTO_TEMP(chan));
1051
data->conf1 = adm1031_read_value(client, ADM1031_REG_CONF1);
1052
data->conf2 = adm1031_read_value(client, ADM1031_REG_CONF2);
1054
data->alarm = adm1031_read_value(client, ADM1031_REG_STATUS(0))
1055
| (adm1031_read_value(client, ADM1031_REG_STATUS(1))
1057
if (data->chip_type == adm1030) {
1058
data->alarm &= 0xc0ff;
1061
for (chan=0; chan<(data->chip_type == adm1030 ? 1 : 2); chan++) {
1062
data->fan_div[chan] =
1063
adm1031_read_value(client, ADM1031_REG_FAN_DIV(chan));
1064
data->fan_min[chan] =
1065
adm1031_read_value(client, ADM1031_REG_FAN_MIN(chan));
1067
adm1031_read_value(client, ADM1031_REG_FAN_SPEED(chan));
1069
0xf & (adm1031_read_value(client, ADM1031_REG_PWM) >>
1072
data->last_updated = jiffies;
1076
mutex_unlock(&data->update_lock);
1081
static int __init sensors_adm1031_init(void)
1083
return i2c_add_driver(&adm1031_driver);
1086
static void __exit sensors_adm1031_exit(void)
1088
i2c_del_driver(&adm1031_driver);
1091
MODULE_AUTHOR("Alexandre d'Alton <alex@alexdalton.org>");
1092
MODULE_DESCRIPTION("ADM1031/ADM1030 driver");
1093
MODULE_LICENSE("GPL");
1095
module_init(sensors_adm1031_init);
1096
module_exit(sensors_adm1031_exit);