AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-11-24 06:50:58 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity
2adb0313b1
linux_dsm_epyc7002/drivers/hwmon/lm80.c
Greg Kroah-Hartman 4baaa4946d Revert "hwmon: (lm80) fix a missing check of bus read in lm80 probe" 
commit 99ae3417672a6d4a3bf68d4fc43d7c6ca074d477 upstream.

This reverts commit 9aa3aa15f4.

Because of recent interactions with developers from @umn.edu, all
commits from them have been recently re-reviewed to ensure if they were
correct or not.

Upon review, it was determined that this commit is not needed at all so
just revert it.  Also, the call to lm80_init_client() was not properly
handled, so if error handling is needed in the lm80_probe() function,
then it should be done properly, not half-baked like the commit being
reverted here did.

Cc: Kangjie Lu <kjlu@umn.edu>
Fixes: 9aa3aa15f4 ("hwmon: (lm80) fix a missing check of bus read in lm80 probe")
Cc: stable <stable@vger.kernel.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20210503115736.2104747-5-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-26 12:06:54 +02:00

648 lines
18 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* lm80.c - From lm_sensors, Linux kernel modules for hardware
* monitoring
* Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
* and Philip Edelbrock <phil@netroedge.com>
*
* Ported to Linux 2.6 by Tiago Sousa <mirage@kaotik.org>
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
0x2e, 0x2f, I2C_CLIENT_END };
/* Many LM80 constants specified below */
/* The LM80 registers */
#define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2)
#define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2)
#define LM80_REG_IN(nr) (0x20 + (nr))
#define LM80_REG_FAN1 0x28
#define LM80_REG_FAN2 0x29
#define LM80_REG_FAN_MIN(nr) (0x3b + (nr))
#define LM80_REG_TEMP 0x27
#define LM80_REG_TEMP_HOT_MAX 0x38
#define LM80_REG_TEMP_HOT_HYST 0x39
#define LM80_REG_TEMP_OS_MAX 0x3a
#define LM80_REG_TEMP_OS_HYST 0x3b
#define LM80_REG_CONFIG 0x00
#define LM80_REG_ALARM1 0x01
#define LM80_REG_ALARM2 0x02
#define LM80_REG_MASK1 0x03
#define LM80_REG_MASK2 0x04
#define LM80_REG_FANDIV 0x05
#define LM80_REG_RES 0x06
#define LM96080_REG_CONV_RATE 0x07
#define LM96080_REG_MAN_ID 0x3e
#define LM96080_REG_DEV_ID 0x3f
/*
* Conversions. Rounding and limit checking is only done on the TO_REG
* variants. Note that you should be a bit careful with which arguments
* these macros are called: arguments may be evaluated more than once.
* Fixing this is just not worth it.
*/
#define IN_TO_REG(val) (clamp_val(((val) + 5) / 10, 0, 255))
#define IN_FROM_REG(val) ((val) * 10)
static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div)
{
if (rpm == 0)
return 255;
rpm = clamp_val(rpm, 1, 1000000);
return clamp_val((1350000 + rpm * div / 2) / (rpm * div), 1, 254);
}
#define FAN_FROM_REG(val, div) ((val) == 0 ? -1 : \
(val) == 255 ? 0 : 1350000/((div) * (val)))
#define TEMP_FROM_REG(reg) ((reg) * 125 / 32)
#define TEMP_TO_REG(temp) (DIV_ROUND_CLOSEST(clamp_val((temp), \
-128000, 127000), 1000) << 8)
#define DIV_FROM_REG(val) (1 << (val))
enum temp_index {
t_input = 0,
t_hot_max,
t_hot_hyst,
t_os_max,
t_os_hyst,
t_num_temp
};
static const u8 temp_regs[t_num_temp] = {
[t_input] = LM80_REG_TEMP,
[t_hot_max] = LM80_REG_TEMP_HOT_MAX,
[t_hot_hyst] = LM80_REG_TEMP_HOT_HYST,
[t_os_max] = LM80_REG_TEMP_OS_MAX,
[t_os_hyst] = LM80_REG_TEMP_OS_HYST,
};
enum in_index {
i_input = 0,
i_max,
i_min,
i_num_in
};
enum fan_index {
f_input,
f_min,
f_num_fan
};
/*
* Client data (each client gets its own)
*/
struct lm80_data {
struct i2c_client *client;
struct mutex update_lock;
char error; /* !=0 if error occurred during last update */
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
u8 in[i_num_in][7]; /* Register value, 1st index is enum in_index */
u8 fan[f_num_fan][2]; /* Register value, 1st index enum fan_index */
u8 fan_div[2]; /* Register encoding, shifted right */
s16 temp[t_num_temp]; /* Register values, normalized to 16 bit */
u16 alarms; /* Register encoding, combined */
};
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 and after read errors */
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 lm80_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->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(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_input][i] = rv;
rv = lm80_read_value(client, LM80_REG_IN_MIN(i));
if (rv < 0)
goto abort;
data->in[i_min][i] = rv;
rv = lm80_read_value(client, LM80_REG_IN_MAX(i));
if (rv < 0)
goto abort;
data->in[i_max][i] = rv;
}
rv = lm80_read_value(client, LM80_REG_FAN1);
if (rv < 0)
goto abort;
data->fan[f_input][0] = rv;
rv = lm80_read_value(client, LM80_REG_FAN_MIN(1));
if (rv < 0)
goto abort;
data->fan[f_min][0] = rv;
rv = lm80_read_value(client, LM80_REG_FAN2);
if (rv < 0)
goto abort;
data->fan[f_input][1] = rv;
rv = lm80_read_value(client, LM80_REG_FAN_MIN(2));
if (rv < 0)
goto abort;
data->fan[f_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[t_input] = (prev_rv << 8) | (rv & 0xf0);
for (i = t_input + 1; i < t_num_temp; i++) {
rv = lm80_read_value(client, temp_regs[i]);
if (rv < 0)
goto abort;
data->temp[i] = rv << 8;
}
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;
}
/*
* Sysfs stuff
*/
static ssize_t in_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct lm80_data *data = lm80_update_device(dev);
int index = to_sensor_dev_attr_2(attr)->index;
int nr = to_sensor_dev_attr_2(attr)->nr;
if (IS_ERR(data))
return PTR_ERR(data);
return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr][index]));
}
static ssize_t in_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct lm80_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int index = to_sensor_dev_attr_2(attr)->index;
int nr = to_sensor_dev_attr_2(attr)->nr;
long val;
u8 reg;
int err = kstrtol(buf, 10, &val);
if (err < 0)
return err;
reg = nr == i_min ? LM80_REG_IN_MIN(index) : LM80_REG_IN_MAX(index);
mutex_lock(&data->update_lock);
data->in[nr][index] = IN_TO_REG(val);
lm80_write_value(client, reg, data->in[nr][index]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t fan_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
int index = to_sensor_dev_attr_2(attr)->index;
int nr = to_sensor_dev_attr_2(attr)->nr;
struct lm80_data *data = lm80_update_device(dev);
if (IS_ERR(data))
return PTR_ERR(data);
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan[nr][index],
DIV_FROM_REG(data->fan_div[index])));
}
static ssize_t fan_div_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
int nr = to_sensor_dev_attr(attr)->index;
struct lm80_data *data = lm80_update_device(dev);
if (IS_ERR(data))
return PTR_ERR(data);
return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr]));
}
static ssize_t fan_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int index = to_sensor_dev_attr_2(attr)->index;
int nr = to_sensor_dev_attr_2(attr)->nr;
struct lm80_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long val;
int err = kstrtoul(buf, 10, &val);
if (err < 0)
return err;
mutex_lock(&data->update_lock);
data->fan[nr][index] = FAN_TO_REG(val,
DIV_FROM_REG(data->fan_div[index]));
lm80_write_value(client, LM80_REG_FAN_MIN(index + 1),
data->fan[nr][index]);
mutex_unlock(&data->update_lock);
return count;
}
/*
* Note: we save and restore the fan minimum here, because its value is
* determined in part by the fan divisor. This follows the principle of
* least surprise; the user doesn't expect the fan minimum to change just
* because the divisor changed.
*/
static ssize_t fan_div_store(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
int nr = to_sensor_dev_attr(attr)->index;
struct lm80_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long min, val;
u8 reg;
int rv;
rv = kstrtoul(buf, 10, &val);
if (rv < 0)
return rv;
/* Save fan_min */
mutex_lock(&data->update_lock);
min = FAN_FROM_REG(data->fan[f_min][nr],
DIV_FROM_REG(data->fan_div[nr]));
switch (val) {
case 1:
data->fan_div[nr] = 0;
break;
case 2:
data->fan_div[nr] = 1;
break;
case 4:
data->fan_div[nr] = 2;
break;
case 8:
data->fan_div[nr] = 3;
break;
default:
dev_err(dev,
"fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n",
val);
mutex_unlock(&data->update_lock);
return -EINVAL;
}
rv = lm80_read_value(client, LM80_REG_FANDIV);
if (rv < 0) {
mutex_unlock(&data->update_lock);
return rv;
}
reg = (rv & ~(3 << (2 * (nr + 1))))
| (data->fan_div[nr] << (2 * (nr + 1)));
lm80_write_value(client, LM80_REG_FANDIV, reg);
/* Restore fan_min */
data->fan[f_min][nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1),
data->fan[f_min][nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct lm80_data *data = lm80_update_device(dev);
if (IS_ERR(data))
return PTR_ERR(data);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[attr->index]));
}
static ssize_t temp_store(struct device *dev,
struct device_attribute *devattr, const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct lm80_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int nr = attr->index;
long val;
int err = kstrtol(buf, 10, &val);
if (err < 0)
return err;
mutex_lock(&data->update_lock);
data->temp[nr] = TEMP_TO_REG(val);
lm80_write_value(client, temp_regs[nr], data->temp[nr] >> 8);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t alarms_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct lm80_data *data = lm80_update_device(dev);
if (IS_ERR(data))
return PTR_ERR(data);
return sprintf(buf, "%u\n", data->alarms);
}
static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
int bitnr = to_sensor_dev_attr(attr)->index;
struct lm80_data *data = lm80_update_device(dev);
if (IS_ERR(data))
return PTR_ERR(data);
return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1);
}
static SENSOR_DEVICE_ATTR_2_RW(in0_min, in, i_min, 0);
static SENSOR_DEVICE_ATTR_2_RW(in1_min, in, i_min, 1);
static SENSOR_DEVICE_ATTR_2_RW(in2_min, in, i_min, 2);
static SENSOR_DEVICE_ATTR_2_RW(in3_min, in, i_min, 3);
static SENSOR_DEVICE_ATTR_2_RW(in4_min, in, i_min, 4);
static SENSOR_DEVICE_ATTR_2_RW(in5_min, in, i_min, 5);
static SENSOR_DEVICE_ATTR_2_RW(in6_min, in, i_min, 6);
static SENSOR_DEVICE_ATTR_2_RW(in0_max, in, i_max, 0);
static SENSOR_DEVICE_ATTR_2_RW(in1_max, in, i_max, 1);
static SENSOR_DEVICE_ATTR_2_RW(in2_max, in, i_max, 2);
static SENSOR_DEVICE_ATTR_2_RW(in3_max, in, i_max, 3);
static SENSOR_DEVICE_ATTR_2_RW(in4_max, in, i_max, 4);
static SENSOR_DEVICE_ATTR_2_RW(in5_max, in, i_max, 5);
static SENSOR_DEVICE_ATTR_2_RW(in6_max, in, i_max, 6);
static SENSOR_DEVICE_ATTR_2_RO(in0_input, in, i_input, 0);
static SENSOR_DEVICE_ATTR_2_RO(in1_input, in, i_input, 1);
static SENSOR_DEVICE_ATTR_2_RO(in2_input, in, i_input, 2);
static SENSOR_DEVICE_ATTR_2_RO(in3_input, in, i_input, 3);
static SENSOR_DEVICE_ATTR_2_RO(in4_input, in, i_input, 4);
static SENSOR_DEVICE_ATTR_2_RO(in5_input, in, i_input, 5);
static SENSOR_DEVICE_ATTR_2_RO(in6_input, in, i_input, 6);
static SENSOR_DEVICE_ATTR_2_RW(fan1_min, fan, f_min, 0);
static SENSOR_DEVICE_ATTR_2_RW(fan2_min, fan, f_min, 1);
static SENSOR_DEVICE_ATTR_2_RO(fan1_input, fan, f_input, 0);
static SENSOR_DEVICE_ATTR_2_RO(fan2_input, fan, f_input, 1);
static SENSOR_DEVICE_ATTR_RW(fan1_div, fan_div, 0);
static SENSOR_DEVICE_ATTR_RW(fan2_div, fan_div, 1);
static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, t_input);
static SENSOR_DEVICE_ATTR_RW(temp1_max, temp, t_hot_max);
static SENSOR_DEVICE_ATTR_RW(temp1_max_hyst, temp, t_hot_hyst);
static SENSOR_DEVICE_ATTR_RW(temp1_crit, temp, t_os_max);
static SENSOR_DEVICE_ATTR_RW(temp1_crit_hyst, temp, t_os_hyst);
static DEVICE_ATTR_RO(alarms);
static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0);
static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1);
static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2);
static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3);
static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 4);
static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 5);
static SENSOR_DEVICE_ATTR_RO(in6_alarm, alarm, 6);
static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, 10);
static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, 11);
static SENSOR_DEVICE_ATTR_RO(temp1_max_alarm, alarm, 8);
static SENSOR_DEVICE_ATTR_RO(temp1_crit_alarm, alarm, 13);
/*
* Real code
*/
static struct attribute *lm80_attrs[] = {
&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,
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
&sensor_dev_attr_temp1_crit.dev_attr.attr,
&sensor_dev_attr_temp1_crit_hyst.dev_attr.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
};
ATTRIBUTE_GROUPS(lm80);
/* 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)
{
struct device *dev = &client->dev;
struct device *hwmon_dev;
struct lm80_data *data;
data = devm_kzalloc(dev, sizeof(struct lm80_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->client = client;
mutex_init(&data->update_lock);
/* Initialize the LM80 chip */
lm80_init_client(client);
/* A few vars need to be filled upon startup */
data->fan[f_min][0] = lm80_read_value(client, LM80_REG_FAN_MIN(1));
data->fan[f_min][1] = lm80_read_value(client, LM80_REG_FAN_MIN(2));
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data, lm80_groups);
return PTR_ERR_OR_ZERO(hwmon_dev);
}
/*
* Driver data (common to all clients)
*/
static const struct i2c_device_id lm80_id[] = {
{ "lm80", 0 },
{ "lm96080", 1 },
{ }
};
MODULE_DEVICE_TABLE(i2c, lm80_id);
static struct i2c_driver lm80_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "lm80",
},
.probe_new = lm80_probe,
.id_table = lm80_id,
.detect = lm80_detect,
.address_list = normal_i2c,
};
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");
Reference in New Issue View Git Blame Copy Permalink