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Diffstat (limited to 'drivers/hwmon/smsc47m192.c')
-rw-r--r--drivers/hwmon/smsc47m192.c338
1 files changed, 174 insertions, 164 deletions
diff --git a/drivers/hwmon/smsc47m192.c b/drivers/hwmon/smsc47m192.c
index a6833f43739..34b9a601ad0 100644
--- a/drivers/hwmon/smsc47m192.c
+++ b/drivers/hwmon/smsc47m192.c
@@ -1,25 +1,25 @@
/*
- smsc47m192.c - Support for hardware monitoring block of
- SMSC LPC47M192 and LPC47M997 Super I/O chips
-
- Copyright (C) 2006 Hartmut Rick <linux@rick.claranet.de>
-
- Derived from lm78.c and other chip drivers.
-
- 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.
-*/
+ * smsc47m192.c - Support for hardware monitoring block of
+ * SMSC LPC47M192 and compatible Super I/O chips
+ *
+ * Copyright (C) 2006 Hartmut Rick <linux@rick.claranet.de>
+ *
+ * Derived from lm78.c and other chip drivers.
+ *
+ * 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>
@@ -31,24 +31,22 @@
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/sysfs.h>
+#include <linux/mutex.h>
/* Addresses to scan */
-static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
-
-/* Insmod parameters */
-I2C_CLIENT_INSMOD_1(smsc47m192);
+static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
/* SMSC47M192 registers */
-#define SMSC47M192_REG_IN(nr) ((nr)<6 ? (0x20 + (nr)) : \
+#define SMSC47M192_REG_IN(nr) ((nr) < 6 ? (0x20 + (nr)) : \
(0x50 + (nr) - 6))
-#define SMSC47M192_REG_IN_MAX(nr) ((nr)<6 ? (0x2b + (nr) * 2) : \
+#define SMSC47M192_REG_IN_MAX(nr) ((nr) < 6 ? (0x2b + (nr) * 2) : \
(0x54 + (((nr) - 6) * 2)))
-#define SMSC47M192_REG_IN_MIN(nr) ((nr)<6 ? (0x2c + (nr) * 2) : \
+#define SMSC47M192_REG_IN_MIN(nr) ((nr) < 6 ? (0x2c + (nr) * 2) : \
(0x55 + (((nr) - 6) * 2)))
static u8 SMSC47M192_REG_TEMP[3] = { 0x27, 0x26, 0x52 };
static u8 SMSC47M192_REG_TEMP_MAX[3] = { 0x39, 0x37, 0x58 };
static u8 SMSC47M192_REG_TEMP_MIN[3] = { 0x3A, 0x38, 0x59 };
-#define SMSC47M192_REG_TEMP_OFFSET(nr) ((nr)==2 ? 0x1e : 0x1f)
+#define SMSC47M192_REG_TEMP_OFFSET(nr) ((nr) == 2 ? 0x1e : 0x1f)
#define SMSC47M192_REG_ALARM1 0x41
#define SMSC47M192_REG_ALARM2 0x42
#define SMSC47M192_REG_VID 0x47
@@ -79,14 +77,16 @@ static inline unsigned int IN_FROM_REG(u8 reg, int n)
static inline u8 IN_TO_REG(unsigned long val, int n)
{
- return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255);
+ return clamp_val(SCALE(val, 192, nom_mv[n]), 0, 255);
}
-/* TEMP: 0.001 degC units (-128C to +127C)
- REG: 1C/bit, two's complement */
+/*
+ * TEMP: 0.001 degC units (-128C to +127C)
+ * REG: 1C/bit, two's complement
+ */
static inline s8 TEMP_TO_REG(int val)
{
- return SENSORS_LIMIT(SCALE(val, 1, 1000), -128000, 127000);
+ return SCALE(clamp_val(val, -128000, 127000), 1, 1000);
}
static inline int TEMP_FROM_REG(s8 val)
@@ -95,9 +95,8 @@ static inline int TEMP_FROM_REG(s8 val)
}
struct smsc47m192_data {
- struct i2c_client client;
- struct class_device *class_dev;
- struct semaphore update_lock;
+ struct device *hwmon_dev;
+ struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
@@ -113,18 +112,29 @@ struct smsc47m192_data {
u8 vrm;
};
-static int smsc47m192_attach_adapter(struct i2c_adapter *adapter);
-static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
- int kind);
-static int smsc47m192_detach_client(struct i2c_client *client);
+static int smsc47m192_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int smsc47m192_detect(struct i2c_client *client,
+ struct i2c_board_info *info);
+static int smsc47m192_remove(struct i2c_client *client);
static struct smsc47m192_data *smsc47m192_update_device(struct device *dev);
+static const struct i2c_device_id smsc47m192_id[] = {
+ { "smsc47m192", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, smsc47m192_id);
+
static struct i2c_driver smsc47m192_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "smsc47m192",
},
- .attach_adapter = smsc47m192_attach_adapter,
- .detach_client = smsc47m192_detach_client,
+ .probe = smsc47m192_probe,
+ .remove = smsc47m192_remove,
+ .id_table = smsc47m192_id,
+ .detect = smsc47m192_detect,
+ .address_list = normal_i2c,
};
/* Voltages */
@@ -162,13 +172,18 @@ static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
- unsigned long val = simple_strtoul(buf, NULL, 10);
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
data->in_min[nr] = IN_TO_REG(val, nr);
i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MIN(nr),
data->in_min[nr]);
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
@@ -179,13 +194,18 @@ static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
- unsigned long val = simple_strtoul(buf, NULL, 10);
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
data->in_max[nr] = IN_TO_REG(val, nr);
i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MAX(nr),
data->in_max[nr]);
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
@@ -241,13 +261,18 @@ static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
- long val = simple_strtol(buf, NULL, 10);
+ long val;
+ int err;
- down(&data->update_lock);
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
+
+ mutex_lock(&data->update_lock);
data->temp_min[nr] = TEMP_TO_REG(val);
i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MIN[nr],
data->temp_min[nr]);
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
@@ -258,13 +283,18 @@ static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
- long val = simple_strtol(buf, NULL, 10);
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
data->temp_max[nr] = TEMP_TO_REG(val);
i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MAX[nr],
data->temp_max[nr]);
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
@@ -285,25 +315,32 @@ static ssize_t set_temp_offset(struct device *dev, struct device_attribute
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
- long val = simple_strtol(buf, NULL, 10);
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
data->temp_offset[nr] = TEMP_TO_REG(val);
- if (nr>1)
+ if (nr > 1)
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]);
else if (data->temp_offset[nr] != 0) {
- /* offset[0] and offset[1] share the same register,
- SFR bit 4 activates offset[0] */
+ /*
+ * offset[0] and offset[1] share the same register,
+ * SFR bit 4 activates offset[0]
+ */
i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR,
- (sfr & 0xef) | (nr==0 ? 0x10 : 0));
+ (sfr & 0xef) | (nr == 0 ? 0x10 : 0));
data->temp_offset[1-nr] = 0;
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]);
- } else if ((sfr & 0x10) == (nr==0 ? 0x10 : 0))
+ } else if ((sfr & 0x10) == (nr == 0 ? 0x10 : 0))
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_TEMP_OFFSET(nr), 0);
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
@@ -333,16 +370,24 @@ static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
char *buf)
{
- struct smsc47m192_data *data = smsc47m192_update_device(dev);
+ struct smsc47m192_data *data = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", data->vrm);
}
static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct smsc47m192_data *data = i2c_get_clientdata(client);
- data->vrm = simple_strtoul(buf, NULL, 10);
+ struct smsc47m192_data *data = dev_get_drvdata(dev);
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+ if (val > 255)
+ return -EINVAL;
+
+ data->vrm = val;
return count;
}
static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
@@ -360,8 +405,8 @@ static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0x0010);
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 0x0020);
static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0x0040);
-static SENSOR_DEVICE_ATTR(temp2_input_fault, S_IRUGO, show_alarm, NULL, 0x4000);
-static SENSOR_DEVICE_ATTR(temp3_input_fault, S_IRUGO, show_alarm, NULL, 0x8000);
+static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 0x4000);
+static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 0x8000);
static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0x0001);
static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0x0002);
static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 0x0004);
@@ -411,13 +456,13 @@ static struct attribute *smsc47m192_attributes[] = {
&sensor_dev_attr_temp2_min.dev_attr.attr,
&sensor_dev_attr_temp2_offset.dev_attr.attr,
&sensor_dev_attr_temp2_alarm.dev_attr.attr,
- &sensor_dev_attr_temp2_input_fault.dev_attr.attr,
+ &sensor_dev_attr_temp2_fault.dev_attr.attr,
&sensor_dev_attr_temp3_input.dev_attr.attr,
&sensor_dev_attr_temp3_max.dev_attr.attr,
&sensor_dev_attr_temp3_min.dev_attr.attr,
&sensor_dev_attr_temp3_offset.dev_attr.attr,
&sensor_dev_attr_temp3_alarm.dev_attr.attr,
- &sensor_dev_attr_temp3_input_fault.dev_attr.attr,
+ &sensor_dev_attr_temp3_fault.dev_attr.attr,
&dev_attr_cpu0_vid.attr,
&dev_attr_vrm.attr,
@@ -440,17 +485,6 @@ static const struct attribute_group smsc47m192_group_in4 = {
.attrs = smsc47m192_attributes_in4,
};
-/* This function is called when:
- * smsc47m192_driver is inserted (when this module is loaded), for each
- available adapter
- * when a new adapter is inserted (and smsc47m192_driver is still present) */
-static int smsc47m192_attach_adapter(struct i2c_adapter *adapter)
-{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_probe(adapter, &addr_data, smsc47m192_detect);
-}
-
static void smsc47m192_init_client(struct i2c_client *client)
{
int i;
@@ -462,13 +496,13 @@ static void smsc47m192_init_client(struct i2c_client *client)
(sfr & 0xfd) | 0x02);
if (!(config & 0x01)) {
/* initialize alarm limits */
- for (i=0; i<8; i++) {
+ for (i = 0; i < 8; i++) {
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_IN_MIN(i), 0);
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_IN_MAX(i), 0xff);
}
- for (i=0; i<3; i++) {
+ for (i = 0; i < 3; i++) {
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_TEMP_MIN[i], 0x80);
i2c_smbus_write_byte_data(client,
@@ -481,80 +515,76 @@ static void smsc47m192_init_client(struct i2c_client *client)
}
}
-/* This function is called by i2c_probe */
-static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
- int kind)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int smsc47m192_detect(struct i2c_client *client,
+ struct i2c_board_info *info)
{
- struct i2c_client *client;
- struct smsc47m192_data *data;
- int err = 0;
- int version, config;
+ struct i2c_adapter *adapter = client->adapter;
+ int version;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
- goto exit;
-
- if (!(data = kzalloc(sizeof(struct smsc47m192_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
- }
-
- client = &data->client;
- i2c_set_clientdata(client, data);
- client->addr = address;
- client->adapter = adapter;
- client->driver = &smsc47m192_driver;
-
- if (kind == 0)
- kind = smsc47m192;
+ return -ENODEV;
/* Detection criteria from sensors_detect script */
- if (kind < 0) {
- if (i2c_smbus_read_byte_data(client,
+ version = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VERSION);
+ if (i2c_smbus_read_byte_data(client,
SMSC47M192_REG_COMPANY_ID) == 0x55
- && ((version = i2c_smbus_read_byte_data(client,
- SMSC47M192_REG_VERSION)) & 0xf0) == 0x20
- && (i2c_smbus_read_byte_data(client,
+ && (version & 0xf0) == 0x20
+ && (i2c_smbus_read_byte_data(client,
SMSC47M192_REG_VID) & 0x70) == 0x00
- && (i2c_smbus_read_byte_data(client,
+ && (i2c_smbus_read_byte_data(client,
SMSC47M192_REG_VID4) & 0xfe) == 0x80) {
- dev_info(&adapter->dev,
- "found SMSC47M192 or SMSC47M997, "
- "version 2, stepping A%d\n", version & 0x0f);
- } else {
- dev_dbg(&adapter->dev,
- "SMSC47M192 detection failed at 0x%02x\n",
- address);
- goto exit_free;
- }
+ dev_info(&adapter->dev,
+ "found SMSC47M192 or compatible, "
+ "version 2, stepping A%d\n", version & 0x0f);
+ } else {
+ dev_dbg(&adapter->dev,
+ "SMSC47M192 detection failed at 0x%02x\n",
+ client->addr);
+ return -ENODEV;
}
- /* Fill in the remaining client fields and put into the global list */
- strlcpy(client->name, "smsc47m192", I2C_NAME_SIZE);
- data->vrm = vid_which_vrm();
- init_MUTEX(&data->update_lock);
+ strlcpy(info->type, "smsc47m192", I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static int smsc47m192_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct smsc47m192_data *data;
+ int config;
+ int err;
- /* Tell the I2C layer a new client has arrived */
- if ((err = i2c_attach_client(client)))
- goto exit_free;
+ data = devm_kzalloc(&client->dev, sizeof(struct smsc47m192_data),
+ GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, data);
+ data->vrm = vid_which_vrm();
+ mutex_init(&data->update_lock);
/* Initialize the SMSC47M192 chip */
smsc47m192_init_client(client);
/* Register sysfs hooks */
- if ((err = sysfs_create_group(&client->dev.kobj, &smsc47m192_group)))
- goto exit_detach;
+ err = sysfs_create_group(&client->dev.kobj, &smsc47m192_group);
+ if (err)
+ return err;
/* Pin 110 is either in4 (+12V) or VID4 */
config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);
if (!(config & 0x20)) {
- if ((err = sysfs_create_group(&client->dev.kobj,
- &smsc47m192_group_in4)))
+ err = sysfs_create_group(&client->dev.kobj,
+ &smsc47m192_group_in4);
+ if (err)
goto exit_remove_files;
}
- data->class_dev = hwmon_device_register(&client->dev);
- if (IS_ERR(data->class_dev)) {
- err = PTR_ERR(data->class_dev);
+ data->hwmon_dev = hwmon_device_register(&client->dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ err = PTR_ERR(data->hwmon_dev);
goto exit_remove_files;
}
@@ -563,28 +593,17 @@ static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
exit_remove_files:
sysfs_remove_group(&client->dev.kobj, &smsc47m192_group);
sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4);
-exit_detach:
- i2c_detach_client(client);
-exit_free:
- kfree(data);
-exit:
return err;
}
-static int smsc47m192_detach_client(struct i2c_client *client)
+static int smsc47m192_remove(struct i2c_client *client)
{
struct smsc47m192_data *data = i2c_get_clientdata(client);
- int err;
- hwmon_device_unregister(data->class_dev);
+ hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &smsc47m192_group);
sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4);
- if ((err = i2c_detach_client(client)))
- return err;
-
- kfree(data);
-
return 0;
}
@@ -594,7 +613,7 @@ static struct smsc47m192_data *smsc47m192_update_device(struct device *dev)
struct smsc47m192_data *data = i2c_get_clientdata(client);
int i, config;
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
|| !data->valid) {
@@ -621,8 +640,10 @@ static struct smsc47m192_data *smsc47m192_update_device(struct device *dev)
for (i = 1; i < 3; i++)
data->temp_offset[i] = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_TEMP_OFFSET(i));
- /* first offset is temp_offset[0] if SFR bit 4 is set,
- temp_offset[1] otherwise */
+ /*
+ * first offset is temp_offset[0] if SFR bit 4 is set,
+ * temp_offset[1] otherwise
+ */
if (sfr & 0x10) {
data->temp_offset[0] = data->temp_offset[1];
data->temp_offset[1] = 0;
@@ -639,30 +660,19 @@ static struct smsc47m192_data *smsc47m192_update_device(struct device *dev)
data->alarms = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_ALARM1) |
(i2c_smbus_read_byte_data(client,
- SMSC47M192_REG_ALARM2) << 8);
+ SMSC47M192_REG_ALARM2) << 8);
data->last_updated = jiffies;
data->valid = 1;
}
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return data;
}
-static int __init smsc47m192_init(void)
-{
- return i2c_add_driver(&smsc47m192_driver);
-}
-
-static void __exit smsc47m192_exit(void)
-{
- i2c_del_driver(&smsc47m192_driver);
-}
+module_i2c_driver(smsc47m192_driver);
MODULE_AUTHOR("Hartmut Rick <linux@rick.claranet.de>");
MODULE_DESCRIPTION("SMSC47M192 driver");
MODULE_LICENSE("GPL");
-
-module_init(smsc47m192_init);
-module_exit(smsc47m192_exit);