![Jean Delvare](/assets/img/avatar_default.png)
Add detection of the National Semiconductor (now Texas Instruments) LM96080. It is functionally compatible with the LM80 but detection is completely different. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Guenter Roeck <guenter.roeck@ericsson.com> Cc: Frans Meulenbroeks <fransmeulenbroeks@gmail.com> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
738 lines
22 KiB
C
738 lines
22 KiB
C
/*
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* lm80.c - From lm_sensors, Linux kernel modules for hardware
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* monitoring
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* Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
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* and Philip Edelbrock <phil@netroedge.com>
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*
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* Ported to Linux 2.6 by Tiago Sousa <mirage@kaotik.org>
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*
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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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*
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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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*
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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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*/
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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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/* Addresses to scan */
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static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
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0x2e, 0x2f, I2C_CLIENT_END };
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/* Many LM80 constants specified below */
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/* The LM80 registers */
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#define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2)
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#define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2)
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#define LM80_REG_IN(nr) (0x20 + (nr))
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#define LM80_REG_FAN1 0x28
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#define LM80_REG_FAN2 0x29
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#define LM80_REG_FAN_MIN(nr) (0x3b + (nr))
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#define LM80_REG_TEMP 0x27
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#define LM80_REG_TEMP_HOT_MAX 0x38
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#define LM80_REG_TEMP_HOT_HYST 0x39
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#define LM80_REG_TEMP_OS_MAX 0x3a
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#define LM80_REG_TEMP_OS_HYST 0x3b
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#define LM80_REG_CONFIG 0x00
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#define LM80_REG_ALARM1 0x01
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#define LM80_REG_ALARM2 0x02
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#define LM80_REG_MASK1 0x03
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#define LM80_REG_MASK2 0x04
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#define LM80_REG_FANDIV 0x05
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#define LM80_REG_RES 0x06
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#define LM96080_REG_CONV_RATE 0x07
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#define LM96080_REG_MAN_ID 0x3e
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#define LM96080_REG_DEV_ID 0x3f
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/*
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* Conversions. Rounding and limit checking is only done on the TO_REG
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* variants. Note that you should be a bit careful with which arguments
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* these macros are called: arguments may be evaluated more than once.
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* Fixing this is just not worth it.
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*/
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#define IN_TO_REG(val) (SENSORS_LIMIT(((val) + 5) / 10, 0, 255))
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#define IN_FROM_REG(val) ((val) * 10)
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static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div)
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{
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if (rpm == 0)
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return 255;
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rpm = SENSORS_LIMIT(rpm, 1, 1000000);
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return SENSORS_LIMIT((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
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}
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#define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \
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(val) == 255 ? 0 : 1350000/((div) * (val)))
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static inline long TEMP_FROM_REG(u16 temp)
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{
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long res;
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temp >>= 4;
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if (temp < 0x0800)
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res = 625 * (long) temp;
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else
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res = ((long) temp - 0x01000) * 625;
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return res / 10;
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}
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#define TEMP_LIMIT_FROM_REG(val) (((val) > 0x80 ? \
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(val) - 0x100 : (val)) * 1000)
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#define TEMP_LIMIT_TO_REG(val) SENSORS_LIMIT((val) < 0 ? \
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((val) - 500) / 1000 : ((val) + 500) / 1000, 0, 255)
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#define DIV_FROM_REG(val) (1 << (val))
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/*
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* Client data (each client gets its own)
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*/
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struct lm80_data {
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struct device *hwmon_dev;
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struct mutex update_lock;
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char error; /* !=0 if error occurred during last update */
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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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u8 in[7]; /* Register value */
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u8 in_max[7]; /* Register value */
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u8 in_min[7]; /* Register value */
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u8 fan[2]; /* Register value */
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u8 fan_min[2]; /* Register value */
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u8 fan_div[2]; /* Register encoding, shifted right */
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u16 temp; /* Register values, shifted right */
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u8 temp_hot_max; /* Register value */
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u8 temp_hot_hyst; /* Register value */
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u8 temp_os_max; /* Register value */
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u8 temp_os_hyst; /* Register value */
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u16 alarms; /* Register encoding, combined */
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};
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/*
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* Functions declaration
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*/
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static int lm80_probe(struct i2c_client *client,
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const struct i2c_device_id *id);
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static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info);
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static void lm80_init_client(struct i2c_client *client);
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static int lm80_remove(struct i2c_client *client);
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static struct lm80_data *lm80_update_device(struct device *dev);
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static int lm80_read_value(struct i2c_client *client, u8 reg);
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static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value);
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/*
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* Driver data (common to all clients)
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*/
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static const struct i2c_device_id lm80_id[] = {
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{ "lm80", 0 },
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{ "lm96080", 1 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, lm80_id);
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static struct i2c_driver lm80_driver = {
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.class = I2C_CLASS_HWMON,
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.driver = {
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.name = "lm80",
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},
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.probe = lm80_probe,
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.remove = lm80_remove,
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.id_table = lm80_id,
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.detect = lm80_detect,
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.address_list = normal_i2c,
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};
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/*
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* Sysfs stuff
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*/
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#define show_in(suffix, value) \
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static ssize_t show_in_##suffix(struct device *dev, \
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struct device_attribute *attr, char *buf) \
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{ \
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int nr = to_sensor_dev_attr(attr)->index; \
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struct lm80_data *data = lm80_update_device(dev); \
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if (IS_ERR(data)) \
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return PTR_ERR(data); \
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return sprintf(buf, "%d\n", IN_FROM_REG(data->value[nr])); \
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}
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show_in(min, in_min)
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show_in(max, in_max)
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show_in(input, in)
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#define set_in(suffix, value, reg) \
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static ssize_t set_in_##suffix(struct device *dev, \
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struct device_attribute *attr, const char *buf, size_t count) \
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{ \
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int nr = to_sensor_dev_attr(attr)->index; \
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struct i2c_client *client = to_i2c_client(dev); \
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struct lm80_data *data = i2c_get_clientdata(client); \
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long val; \
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int err = kstrtol(buf, 10, &val); \
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if (err < 0) \
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return err; \
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\
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mutex_lock(&data->update_lock);\
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data->value[nr] = IN_TO_REG(val); \
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lm80_write_value(client, reg(nr), data->value[nr]); \
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mutex_unlock(&data->update_lock);\
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return count; \
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}
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set_in(min, in_min, LM80_REG_IN_MIN)
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set_in(max, in_max, LM80_REG_IN_MAX)
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#define show_fan(suffix, value) \
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static ssize_t show_fan_##suffix(struct device *dev, \
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struct device_attribute *attr, char *buf) \
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{ \
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int nr = to_sensor_dev_attr(attr)->index; \
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struct lm80_data *data = lm80_update_device(dev); \
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if (IS_ERR(data)) \
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return PTR_ERR(data); \
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return sprintf(buf, "%d\n", FAN_FROM_REG(data->value[nr], \
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DIV_FROM_REG(data->fan_div[nr]))); \
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}
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show_fan(min, fan_min)
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show_fan(input, fan)
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static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int nr = to_sensor_dev_attr(attr)->index;
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struct lm80_data *data = lm80_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
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}
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static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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int nr = to_sensor_dev_attr(attr)->index;
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struct i2c_client *client = to_i2c_client(dev);
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struct lm80_data *data = i2c_get_clientdata(client);
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unsigned long val;
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int err = kstrtoul(buf, 10, &val);
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if (err < 0)
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return err;
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mutex_lock(&data->update_lock);
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data->fan_min[nr] = FAN_TO_REG(val, DIV_FROM_REG(data->fan_div[nr]));
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lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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/*
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* Note: we save and restore the fan minimum here, because its value is
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* determined in part by the fan divisor. This follows the principle of
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* least surprise; the user doesn't expect the fan minimum to change just
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* because the divisor changed.
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*/
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static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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int nr = to_sensor_dev_attr(attr)->index;
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struct i2c_client *client = to_i2c_client(dev);
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struct lm80_data *data = i2c_get_clientdata(client);
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unsigned long min, val;
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u8 reg;
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int err = kstrtoul(buf, 10, &val);
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if (err < 0)
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return err;
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/* Save fan_min */
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mutex_lock(&data->update_lock);
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min = FAN_FROM_REG(data->fan_min[nr],
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DIV_FROM_REG(data->fan_div[nr]));
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switch (val) {
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case 1:
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data->fan_div[nr] = 0;
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break;
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case 2:
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data->fan_div[nr] = 1;
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break;
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case 4:
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data->fan_div[nr] = 2;
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break;
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case 8:
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data->fan_div[nr] = 3;
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break;
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default:
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dev_err(&client->dev, "fan_div value %ld not "
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"supported. Choose one of 1, 2, 4 or 8!\n", val);
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mutex_unlock(&data->update_lock);
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return -EINVAL;
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}
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reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1))))
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| (data->fan_div[nr] << (2 * (nr + 1)));
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lm80_write_value(client, LM80_REG_FANDIV, reg);
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/* Restore fan_min */
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data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
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lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t show_temp_input1(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct lm80_data *data = lm80_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp));
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}
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#define show_temp(suffix, value) \
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static ssize_t show_temp_##suffix(struct device *dev, \
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struct device_attribute *attr, char *buf) \
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{ \
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struct lm80_data *data = lm80_update_device(dev); \
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if (IS_ERR(data)) \
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return PTR_ERR(data); \
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return sprintf(buf, "%d\n", TEMP_LIMIT_FROM_REG(data->value)); \
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}
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show_temp(hot_max, temp_hot_max);
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show_temp(hot_hyst, temp_hot_hyst);
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show_temp(os_max, temp_os_max);
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show_temp(os_hyst, temp_os_hyst);
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#define set_temp(suffix, value, reg) \
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static ssize_t set_temp_##suffix(struct device *dev, \
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struct device_attribute *attr, const char *buf, size_t count) \
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{ \
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struct i2c_client *client = to_i2c_client(dev); \
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struct lm80_data *data = i2c_get_clientdata(client); \
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long val; \
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int err = kstrtol(buf, 10, &val); \
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if (err < 0) \
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return err; \
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\
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mutex_lock(&data->update_lock); \
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data->value = TEMP_LIMIT_TO_REG(val); \
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lm80_write_value(client, reg, data->value); \
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mutex_unlock(&data->update_lock); \
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return count; \
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}
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set_temp(hot_max, temp_hot_max, LM80_REG_TEMP_HOT_MAX);
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set_temp(hot_hyst, temp_hot_hyst, LM80_REG_TEMP_HOT_HYST);
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set_temp(os_max, temp_os_max, LM80_REG_TEMP_OS_MAX);
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set_temp(os_hyst, temp_os_hyst, LM80_REG_TEMP_OS_HYST);
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static ssize_t show_alarms(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct lm80_data *data = lm80_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%u\n", data->alarms);
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}
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static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int bitnr = to_sensor_dev_attr(attr)->index;
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struct lm80_data *data = lm80_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
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}
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static SENSOR_DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO,
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show_in_min, set_in_min, 0);
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static SENSOR_DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO,
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show_in_min, set_in_min, 1);
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static SENSOR_DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO,
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show_in_min, set_in_min, 2);
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static SENSOR_DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO,
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show_in_min, set_in_min, 3);
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static SENSOR_DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO,
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show_in_min, set_in_min, 4);
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static SENSOR_DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO,
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show_in_min, set_in_min, 5);
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static SENSOR_DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO,
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show_in_min, set_in_min, 6);
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static SENSOR_DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO,
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show_in_max, set_in_max, 0);
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static SENSOR_DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO,
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show_in_max, set_in_max, 1);
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static SENSOR_DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO,
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show_in_max, set_in_max, 2);
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static SENSOR_DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO,
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show_in_max, set_in_max, 3);
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static SENSOR_DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO,
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show_in_max, set_in_max, 4);
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static SENSOR_DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO,
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show_in_max, set_in_max, 5);
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static SENSOR_DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO,
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show_in_max, set_in_max, 6);
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static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in_input, NULL, 0);
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static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in_input, NULL, 1);
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static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in_input, NULL, 2);
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static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in_input, NULL, 3);
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static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in_input, NULL, 4);
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static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_in_input, NULL, 5);
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static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_in_input, NULL, 6);
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static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO,
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show_fan_min, set_fan_min, 0);
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static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO,
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show_fan_min, set_fan_min, 1);
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static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input, NULL, 0);
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static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input, NULL, 1);
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static SENSOR_DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO,
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show_fan_div, set_fan_div, 0);
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static SENSOR_DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO,
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show_fan_div, set_fan_div, 1);
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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);
|
|
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, 4);
|
|
static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 5);
|
|
static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 6);
|
|
static SENSOR_DEVICE_ATTR(fan1_alarm, S_IRUGO, show_alarm, NULL, 10);
|
|
static SENSOR_DEVICE_ATTR(fan2_alarm, S_IRUGO, show_alarm, NULL, 11);
|
|
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 8);
|
|
static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 13);
|
|
|
|
/*
|
|
* Real code
|
|
*/
|
|
|
|
static struct attribute *lm80_attributes[] = {
|
|
&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_in4_min.dev_attr.attr,
|
|
&sensor_dev_attr_in5_min.dev_attr.attr,
|
|
&sensor_dev_attr_in6_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_in4_max.dev_attr.attr,
|
|
&sensor_dev_attr_in5_max.dev_attr.attr,
|
|
&sensor_dev_attr_in6_max.dev_attr.attr,
|
|
&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_in4_input.dev_attr.attr,
|
|
&sensor_dev_attr_in5_input.dev_attr.attr,
|
|
&sensor_dev_attr_in6_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_min.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_min.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_div.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_div.dev_attr.attr,
|
|
&dev_attr_temp1_input.attr,
|
|
&dev_attr_temp1_max.attr,
|
|
&dev_attr_temp1_max_hyst.attr,
|
|
&dev_attr_temp1_crit.attr,
|
|
&dev_attr_temp1_crit_hyst.attr,
|
|
&dev_attr_alarms.attr,
|
|
&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_in4_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_in5_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_in6_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_fan2_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group lm80_group = {
|
|
.attrs = lm80_attributes,
|
|
};
|
|
|
|
/* Return 0 if detection is successful, -ENODEV otherwise */
|
|
static int lm80_detect(struct i2c_client *client, struct i2c_board_info *info)
|
|
{
|
|
struct i2c_adapter *adapter = client->adapter;
|
|
int i, cur, man_id, dev_id;
|
|
const char *name = NULL;
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return -ENODEV;
|
|
|
|
/* First check for unused bits, common to both chip types */
|
|
if ((lm80_read_value(client, LM80_REG_ALARM2) & 0xc0)
|
|
|| (lm80_read_value(client, LM80_REG_CONFIG) & 0x80))
|
|
return -ENODEV;
|
|
|
|
/*
|
|
* The LM96080 has manufacturer and stepping/die rev registers so we
|
|
* can just check that. The LM80 does not have such registers so we
|
|
* have to use a more expensive trick.
|
|
*/
|
|
man_id = lm80_read_value(client, LM96080_REG_MAN_ID);
|
|
dev_id = lm80_read_value(client, LM96080_REG_DEV_ID);
|
|
if (man_id == 0x01 && dev_id == 0x08) {
|
|
/* Check more unused bits for confirmation */
|
|
if (lm80_read_value(client, LM96080_REG_CONV_RATE) & 0xfe)
|
|
return -ENODEV;
|
|
|
|
name = "lm96080";
|
|
} else {
|
|
/* Check 6-bit addressing */
|
|
for (i = 0x2a; i <= 0x3d; i++) {
|
|
cur = i2c_smbus_read_byte_data(client, i);
|
|
if ((i2c_smbus_read_byte_data(client, i + 0x40) != cur)
|
|
|| (i2c_smbus_read_byte_data(client, i + 0x80) != cur)
|
|
|| (i2c_smbus_read_byte_data(client, i + 0xc0) != cur))
|
|
return -ENODEV;
|
|
}
|
|
|
|
name = "lm80";
|
|
}
|
|
|
|
strlcpy(info->type, name, I2C_NAME_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lm80_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct lm80_data *data;
|
|
int err;
|
|
|
|
data = kzalloc(sizeof(struct lm80_data), GFP_KERNEL);
|
|
if (!data) {
|
|
err = -ENOMEM;
|
|
goto exit;
|
|
}
|
|
|
|
i2c_set_clientdata(client, data);
|
|
mutex_init(&data->update_lock);
|
|
|
|
/* Initialize the LM80 chip */
|
|
lm80_init_client(client);
|
|
|
|
/* A few vars need to be filled upon startup */
|
|
data->fan_min[0] = lm80_read_value(client, LM80_REG_FAN_MIN(1));
|
|
data->fan_min[1] = lm80_read_value(client, LM80_REG_FAN_MIN(2));
|
|
|
|
/* Register sysfs hooks */
|
|
err = sysfs_create_group(&client->dev.kobj, &lm80_group);
|
|
if (err)
|
|
goto error_free;
|
|
|
|
data->hwmon_dev = hwmon_device_register(&client->dev);
|
|
if (IS_ERR(data->hwmon_dev)) {
|
|
err = PTR_ERR(data->hwmon_dev);
|
|
goto error_remove;
|
|
}
|
|
|
|
return 0;
|
|
|
|
error_remove:
|
|
sysfs_remove_group(&client->dev.kobj, &lm80_group);
|
|
error_free:
|
|
kfree(data);
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static int lm80_remove(struct i2c_client *client)
|
|
{
|
|
struct lm80_data *data = i2c_get_clientdata(client);
|
|
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
sysfs_remove_group(&client->dev.kobj, &lm80_group);
|
|
|
|
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;
|
|
int rv;
|
|
int prev_rv;
|
|
struct lm80_data *ret = data;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
|
|
if (data->error)
|
|
lm80_init_client(client);
|
|
|
|
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++) {
|
|
rv = lm80_read_value(client, LM80_REG_IN(i));
|
|
if (rv < 0)
|
|
goto abort;
|
|
data->in[i] = rv;
|
|
|
|
rv = lm80_read_value(client, LM80_REG_IN_MIN(i));
|
|
if (rv < 0)
|
|
goto abort;
|
|
data->in_min[i] = rv;
|
|
|
|
rv = lm80_read_value(client, LM80_REG_IN_MAX(i));
|
|
if (rv < 0)
|
|
goto abort;
|
|
data->in_max[i] = rv;
|
|
}
|
|
|
|
rv = lm80_read_value(client, LM80_REG_FAN1);
|
|
if (rv < 0)
|
|
goto abort;
|
|
data->fan[0] = rv;
|
|
|
|
rv = lm80_read_value(client, LM80_REG_FAN_MIN(1));
|
|
if (rv < 0)
|
|
goto abort;
|
|
data->fan_min[0] = rv;
|
|
|
|
rv = lm80_read_value(client, LM80_REG_FAN2);
|
|
if (rv < 0)
|
|
goto abort;
|
|
data->fan[1] = rv;
|
|
|
|
rv = lm80_read_value(client, LM80_REG_FAN_MIN(2));
|
|
if (rv < 0)
|
|
goto abort;
|
|
data->fan_min[1] = rv;
|
|
|
|
prev_rv = rv = lm80_read_value(client, LM80_REG_TEMP);
|
|
if (rv < 0)
|
|
goto abort;
|
|
rv = lm80_read_value(client, LM80_REG_RES);
|
|
if (rv < 0)
|
|
goto abort;
|
|
data->temp = (prev_rv << 8) | (rv & 0xf0);
|
|
|
|
rv = lm80_read_value(client, LM80_REG_TEMP_OS_MAX);
|
|
if (rv < 0)
|
|
goto abort;
|
|
data->temp_os_max = rv;
|
|
|
|
rv = lm80_read_value(client, LM80_REG_TEMP_OS_HYST);
|
|
if (rv < 0)
|
|
goto abort;
|
|
data->temp_os_hyst = rv;
|
|
|
|
rv = lm80_read_value(client, LM80_REG_TEMP_HOT_MAX);
|
|
if (rv < 0)
|
|
goto abort;
|
|
data->temp_hot_max = rv;
|
|
|
|
rv = lm80_read_value(client, LM80_REG_TEMP_HOT_HYST);
|
|
if (rv < 0)
|
|
goto abort;
|
|
data->temp_hot_hyst = rv;
|
|
|
|
rv = lm80_read_value(client, LM80_REG_FANDIV);
|
|
if (rv < 0)
|
|
goto abort;
|
|
data->fan_div[0] = (rv >> 2) & 0x03;
|
|
data->fan_div[1] = (rv >> 4) & 0x03;
|
|
|
|
prev_rv = rv = lm80_read_value(client, LM80_REG_ALARM1);
|
|
if (rv < 0)
|
|
goto abort;
|
|
rv = lm80_read_value(client, LM80_REG_ALARM2);
|
|
if (rv < 0)
|
|
goto abort;
|
|
data->alarms = prev_rv + (rv << 8);
|
|
|
|
data->last_updated = jiffies;
|
|
data->valid = 1;
|
|
data->error = 0;
|
|
}
|
|
goto done;
|
|
|
|
abort:
|
|
ret = ERR_PTR(rv);
|
|
data->valid = 0;
|
|
data->error = 1;
|
|
|
|
done:
|
|
mutex_unlock(&data->update_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
module_i2c_driver(lm80_driver);
|
|
|
|
MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
|
|
"Philip Edelbrock <phil@netroedge.com>");
|
|
MODULE_DESCRIPTION("LM80 driver");
|
|
MODULE_LICENSE("GPL");
|