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Diffstat (limited to 'drivers/hwmon/adm1021.c')
-rw-r--r--drivers/hwmon/adm1021.c268
1 files changed, 155 insertions, 113 deletions
diff --git a/drivers/hwmon/adm1021.c b/drivers/hwmon/adm1021.c
index 1ad0a885c5a..d74241bb278 100644
--- a/drivers/hwmon/adm1021.c
+++ b/drivers/hwmon/adm1021.c
@@ -1,23 +1,23 @@
/*
- adm1021.c - Part of lm_sensors, Linux kernel modules for hardware
- monitoring
- Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and
- Philip Edelbrock <phil@netroedge.com>
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
+ * adm1021.c - Part of lm_sensors, Linux kernel modules for hardware
+ * monitoring
+ * Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and
+ * Philip Edelbrock <phil@netroedge.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
#include <linux/module.h>
#include <linux/init.h>
@@ -70,16 +70,20 @@ enum chips {
/* Initial values */
-/* Note: Even though I left the low and high limits named os and hyst,
-they don't quite work like a thermostat the way the LM75 does. I.e.,
-a lower temp than THYST actually triggers an alarm instead of
-clearing it. Weird, ey? --Phil */
+/*
+ * Note: Even though I left the low and high limits named os and hyst,
+ * they don't quite work like a thermostat the way the LM75 does. I.e.,
+ * a lower temp than THYST actually triggers an alarm instead of
+ * clearing it. Weird, ey? --Phil
+ */
/* Each client has this additional data */
struct adm1021_data {
- struct device *hwmon_dev;
+ struct i2c_client *client;
enum chips type;
+ const struct attribute_group *groups[3];
+
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
char low_power; /* !=0 if device in low power mode */
@@ -99,11 +103,10 @@ static int adm1021_probe(struct i2c_client *client,
static int adm1021_detect(struct i2c_client *client,
struct i2c_board_info *info);
static void adm1021_init_client(struct i2c_client *client);
-static int adm1021_remove(struct i2c_client *client);
static struct adm1021_data *adm1021_update_device(struct device *dev);
/* (amalysh) read only mode, otherwise any limit's writing confuse BIOS */
-static int read_only;
+static bool read_only;
static const struct i2c_device_id adm1021_id[] = {
@@ -126,7 +129,6 @@ static struct i2c_driver adm1021_driver = {
.name = "adm1021",
},
.probe = adm1021_probe,
- .remove = adm1021_remove,
.id_table = adm1021_id,
.detect = adm1021_detect,
.address_list = normal_i2c,
@@ -180,15 +182,22 @@ static ssize_t set_temp_max(struct device *dev,
const char *buf, size_t count)
{
int index = to_sensor_dev_attr(devattr)->index;
- struct i2c_client *client = to_i2c_client(dev);
- struct adm1021_data *data = i2c_get_clientdata(client);
- long temp = simple_strtol(buf, NULL, 10) / 1000;
+ struct adm1021_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ long temp;
+ int reg_val, err;
+
+ err = kstrtol(buf, 10, &temp);
+ if (err)
+ return err;
+ temp /= 1000;
mutex_lock(&data->update_lock);
- data->temp_max[index] = SENSORS_LIMIT(temp, -128, 127);
+ reg_val = clamp_val(temp, -128, 127);
+ data->temp_max[index] = reg_val * 1000;
if (!read_only)
i2c_smbus_write_byte_data(client, ADM1021_REG_TOS_W(index),
- data->temp_max[index]);
+ reg_val);
mutex_unlock(&data->update_lock);
return count;
@@ -199,15 +208,22 @@ static ssize_t set_temp_min(struct device *dev,
const char *buf, size_t count)
{
int index = to_sensor_dev_attr(devattr)->index;
- struct i2c_client *client = to_i2c_client(dev);
- struct adm1021_data *data = i2c_get_clientdata(client);
- long temp = simple_strtol(buf, NULL, 10) / 1000;
+ struct adm1021_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ long temp;
+ int reg_val, err;
+
+ err = kstrtol(buf, 10, &temp);
+ if (err)
+ return err;
+ temp /= 1000;
mutex_lock(&data->update_lock);
- data->temp_min[index] = SENSORS_LIMIT(temp, -128, 127);
+ reg_val = clamp_val(temp, -128, 127);
+ data->temp_min[index] = reg_val * 1000;
if (!read_only)
i2c_smbus_write_byte_data(client, ADM1021_REG_THYST_W(index),
- data->temp_min[index]);
+ reg_val);
mutex_unlock(&data->update_lock);
return count;
@@ -224,9 +240,16 @@ static ssize_t set_low_power(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct adm1021_data *data = i2c_get_clientdata(client);
- int low_power = simple_strtol(buf, NULL, 10) != 0;
+ struct adm1021_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
+ char low_power;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+ low_power = val != 0;
mutex_lock(&data->update_lock);
if (low_power != data->low_power) {
@@ -263,15 +286,11 @@ static DEVICE_ATTR(low_power, S_IWUSR | S_IRUGO, show_low_power, set_low_power);
static struct attribute *adm1021_attributes[] = {
&sensor_dev_attr_temp1_max.dev_attr.attr,
- &sensor_dev_attr_temp1_min.dev_attr.attr,
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp2_max.dev_attr.attr,
- &sensor_dev_attr_temp2_min.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
- &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
- &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_fault.dev_attr.attr,
&dev_attr_alarms.attr,
&dev_attr_low_power.attr,
@@ -282,6 +301,18 @@ static const struct attribute_group adm1021_group = {
.attrs = adm1021_attributes,
};
+static struct attribute *adm1021_min_attributes[] = {
+ &sensor_dev_attr_temp1_min.dev_attr.attr,
+ &sensor_dev_attr_temp2_min.dev_attr.attr,
+ &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group adm1021_min_group = {
+ .attrs = adm1021_min_attributes,
+};
+
/* Return 0 if detection is successful, -ENODEV otherwise */
static int adm1021_detect(struct i2c_client *client,
struct i2c_board_info *info)
@@ -291,8 +322,7 @@ static int adm1021_detect(struct i2c_client *client,
int conv_rate, status, config, man_id, dev_id;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
- pr_debug("adm1021: detect failed, "
- "smbus byte data not supported!\n");
+ pr_debug("detect failed, smbus byte data not supported!\n");
return -ENODEV;
}
@@ -303,7 +333,7 @@ static int adm1021_detect(struct i2c_client *client,
/* Check unused bits */
if ((status & 0x03) || (config & 0x3F) || (conv_rate & 0xF8)) {
- pr_debug("adm1021: detect failed, chip not detected!\n");
+ pr_debug("detect failed, chip not detected!\n");
return -ENODEV;
}
@@ -311,28 +341,70 @@ static int adm1021_detect(struct i2c_client *client,
man_id = i2c_smbus_read_byte_data(client, ADM1021_REG_MAN_ID);
dev_id = i2c_smbus_read_byte_data(client, ADM1021_REG_DEV_ID);
+ if (man_id < 0 || dev_id < 0)
+ return -ENODEV;
+
if (man_id == 0x4d && dev_id == 0x01)
type_name = "max1617a";
else if (man_id == 0x41) {
if ((dev_id & 0xF0) == 0x30)
type_name = "adm1023";
- else
+ else if ((dev_id & 0xF0) == 0x00)
type_name = "adm1021";
+ else
+ return -ENODEV;
} else if (man_id == 0x49)
type_name = "thmc10";
else if (man_id == 0x23)
type_name = "gl523sm";
else if (man_id == 0x54)
type_name = "mc1066";
- /* LM84 Mfr ID in a different place, and it has more unused bits */
- else if (conv_rate == 0x00
- && (config & 0x7F) == 0x00
- && (status & 0xAB) == 0x00)
- type_name = "lm84";
- else
- type_name = "max1617";
-
- pr_debug("adm1021: Detected chip %s at adapter %d, address 0x%02x.\n",
+ else {
+ int lte, rte, lhi, rhi, llo, rlo;
+
+ /* extra checks for LM84 and MAX1617 to avoid misdetections */
+
+ llo = i2c_smbus_read_byte_data(client, ADM1021_REG_THYST_R(0));
+ rlo = i2c_smbus_read_byte_data(client, ADM1021_REG_THYST_R(1));
+
+ /* fail if any of the additional register reads failed */
+ if (llo < 0 || rlo < 0)
+ return -ENODEV;
+
+ lte = i2c_smbus_read_byte_data(client, ADM1021_REG_TEMP(0));
+ rte = i2c_smbus_read_byte_data(client, ADM1021_REG_TEMP(1));
+ lhi = i2c_smbus_read_byte_data(client, ADM1021_REG_TOS_R(0));
+ rhi = i2c_smbus_read_byte_data(client, ADM1021_REG_TOS_R(1));
+
+ /*
+ * Fail for negative temperatures and negative high limits.
+ * This check also catches read errors on the tested registers.
+ */
+ if ((s8)lte < 0 || (s8)rte < 0 || (s8)lhi < 0 || (s8)rhi < 0)
+ return -ENODEV;
+
+ /* fail if all registers hold the same value */
+ if (lte == rte && lte == lhi && lte == rhi && lte == llo
+ && lte == rlo)
+ return -ENODEV;
+
+ /*
+ * LM84 Mfr ID is in a different place,
+ * and it has more unused bits.
+ */
+ if (conv_rate == 0x00
+ && (config & 0x7F) == 0x00
+ && (status & 0xAB) == 0x00) {
+ type_name = "lm84";
+ } else {
+ /* fail if low limits are larger than high limits */
+ if ((s8)llo > lhi || (s8)rlo > rhi)
+ return -ENODEV;
+ type_name = "max1617";
+ }
+ }
+
+ pr_debug("Detected chip %s at adapter %d, address 0x%02x.\n",
type_name, i2c_adapter_id(adapter), client->addr);
strlcpy(info->type, type_name, I2C_NAME_SIZE);
@@ -342,17 +414,15 @@ static int adm1021_detect(struct i2c_client *client,
static int adm1021_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
+ struct device *dev = &client->dev;
struct adm1021_data *data;
- int err;
+ struct device *hwmon_dev;
- data = kzalloc(sizeof(struct adm1021_data), GFP_KERNEL);
- if (!data) {
- pr_debug("adm1021: detect failed, kzalloc failed!\n");
- err = -ENOMEM;
- goto error0;
- }
+ data = devm_kzalloc(dev, sizeof(struct adm1021_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
- i2c_set_clientdata(client, data);
+ data->client = client;
data->type = id->driver_data;
mutex_init(&data->update_lock);
@@ -360,24 +430,14 @@ static int adm1021_probe(struct i2c_client *client,
if (data->type != lm84 && !read_only)
adm1021_init_client(client);
- /* Register sysfs hooks */
- if ((err = sysfs_create_group(&client->dev.kobj, &adm1021_group)))
- goto error1;
-
- data->hwmon_dev = hwmon_device_register(&client->dev);
- if (IS_ERR(data->hwmon_dev)) {
- err = PTR_ERR(data->hwmon_dev);
- goto error3;
- }
+ data->groups[0] = &adm1021_group;
+ if (data->type != lm84)
+ data->groups[1] = &adm1021_min_group;
- return 0;
+ hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
+ data, data->groups);
-error3:
- sysfs_remove_group(&client->dev.kobj, &adm1021_group);
-error1:
- kfree(data);
-error0:
- return err;
+ return PTR_ERR_OR_ZERO(hwmon_dev);
}
static void adm1021_init_client(struct i2c_client *client)
@@ -389,21 +449,10 @@ static void adm1021_init_client(struct i2c_client *client)
i2c_smbus_write_byte_data(client, ADM1021_REG_CONV_RATE_W, 0x04);
}
-static int adm1021_remove(struct i2c_client *client)
-{
- struct adm1021_data *data = i2c_get_clientdata(client);
-
- hwmon_device_unregister(data->hwmon_dev);
- sysfs_remove_group(&client->dev.kobj, &adm1021_group);
-
- kfree(data);
- return 0;
-}
-
static struct adm1021_data *adm1021_update_device(struct device *dev)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct adm1021_data *data = i2c_get_clientdata(client);
+ struct adm1021_data *data = dev_get_drvdata(dev);
+ struct i2c_client *client = data->client;
mutex_lock(&data->update_lock);
@@ -411,7 +460,7 @@ static struct adm1021_data *adm1021_update_device(struct device *dev)
|| !data->valid) {
int i;
- dev_dbg(&client->dev, "Starting adm1021 update\n");
+ dev_dbg(dev, "Starting adm1021 update\n");
for (i = 0; i < 2; i++) {
data->temp[i] = 1000 *
@@ -420,15 +469,19 @@ static struct adm1021_data *adm1021_update_device(struct device *dev)
data->temp_max[i] = 1000 *
(s8) i2c_smbus_read_byte_data(
client, ADM1021_REG_TOS_R(i));
- data->temp_min[i] = 1000 *
- (s8) i2c_smbus_read_byte_data(
- client, ADM1021_REG_THYST_R(i));
+ if (data->type != lm84) {
+ data->temp_min[i] = 1000 *
+ (s8) i2c_smbus_read_byte_data(client,
+ ADM1021_REG_THYST_R(i));
+ }
}
data->alarms = i2c_smbus_read_byte_data(client,
ADM1021_REG_STATUS) & 0x7c;
if (data->type == adm1023) {
- /* The ADM1023 provides 3 extra bits of precision for
- * the remote sensor in extra registers. */
+ /*
+ * The ADM1023 provides 3 extra bits of precision for
+ * the remote sensor in extra registers.
+ */
data->temp[1] += 125 * (i2c_smbus_read_byte_data(
client, ADM1023_REG_REM_TEMP_PREC) >> 5);
data->temp_max[1] += 125 * (i2c_smbus_read_byte_data(
@@ -451,23 +504,12 @@ static struct adm1021_data *adm1021_update_device(struct device *dev)
return data;
}
-static int __init sensors_adm1021_init(void)
-{
- return i2c_add_driver(&adm1021_driver);
-}
+module_i2c_driver(adm1021_driver);
-static void __exit sensors_adm1021_exit(void)
-{
- i2c_del_driver(&adm1021_driver);
-}
-
-MODULE_AUTHOR ("Frodo Looijaard <frodol@dds.nl> and "
+MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
"Philip Edelbrock <phil@netroedge.com>");
MODULE_DESCRIPTION("adm1021 driver");
MODULE_LICENSE("GPL");
module_param(read_only, bool, 0);
MODULE_PARM_DESC(read_only, "Don't set any values, read only mode");
-
-module_init(sensors_adm1021_init)
-module_exit(sensors_adm1021_exit)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 07:02:22 +0000