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Diffstat (limited to 'drivers/hwmon/lm85.c')
-rw-r--r--drivers/hwmon/lm85.c352
1 files changed, 172 insertions, 180 deletions
diff --git a/drivers/hwmon/lm85.c b/drivers/hwmon/lm85.c
index 12d446f54f97..3ff0285396fa 100644
--- a/drivers/hwmon/lm85.c
+++ b/drivers/hwmon/lm85.c
@@ -5,6 +5,7 @@
Copyright (c) 2002, 2003 Philip Pokorny <ppokorny@penguincomputing.com>
Copyright (c) 2003 Margit Schubert-While <margitsw@t-online.de>
Copyright (c) 2004 Justin Thiessen <jthiessen@penguincomputing.com>
+ Copyright (C) 2007, 2008 Jean Delvare <khali@linux-fr.org>
Chip details at <http://www.national.com/ds/LM/LM85.pdf>
@@ -173,40 +174,39 @@ static int RANGE_TO_REG(int range)
{
int i;
- if (range >= lm85_range_map[15])
- return 15;
-
/* Find the closest match */
- for (i = 14; i >= 0; --i) {
- if (range >= lm85_range_map[i]) {
- if ((lm85_range_map[i + 1] - range) <
- (range - lm85_range_map[i]))
- return i + 1;
- return i;
- }
+ for (i = 0; i < 15; ++i) {
+ if (range <= (lm85_range_map[i] + lm85_range_map[i + 1]) / 2)
+ break;
}
- return 0;
+ return i;
}
#define RANGE_FROM_REG(val) lm85_range_map[(val) & 0x0f]
/* These are the PWM frequency encodings */
-static const int lm85_freq_map[] = { /* .1 Hz */
- 100, 150, 230, 300, 380, 470, 620, 940
+static const int lm85_freq_map[8] = { /* 1 Hz */
+ 10, 15, 23, 30, 38, 47, 61, 94
+};
+static const int adm1027_freq_map[8] = { /* 1 Hz */
+ 11, 15, 22, 29, 35, 44, 59, 88
};
-static int FREQ_TO_REG(int freq)
+static int FREQ_TO_REG(const int *map, int freq)
{
int i;
- if (freq >= lm85_freq_map[7])
- return 7;
+ /* Find the closest match */
for (i = 0; i < 7; ++i)
- if (freq <= lm85_freq_map[i])
+ if (freq <= (map[i] + map[i + 1]) / 2)
break;
return i;
}
-#define FREQ_FROM_REG(val) lm85_freq_map[(val) & 0x07]
+
+static int FREQ_FROM_REG(const int *map, u8 reg)
+{
+ return map[reg & 0x07];
+}
/* Since we can't use strings, I'm abusing these numbers
* to stand in for the following meanings:
@@ -275,7 +275,6 @@ struct lm85_zone {
struct lm85_autofan {
u8 config; /* Register value */
- u8 freq; /* PWM frequency, encoded */
u8 min_pwm; /* Minimum PWM value, encoded */
u8 min_off; /* Min PWM or OFF below "limit", flag */
};
@@ -283,8 +282,8 @@ struct lm85_autofan {
/* For each registered chip, we need to keep some data in memory.
The structure is dynamically allocated. */
struct lm85_data {
- struct i2c_client client;
struct device *hwmon_dev;
+ const int *freq_map;
enum chips type;
struct mutex update_lock;
@@ -301,6 +300,7 @@ struct lm85_data {
u16 fan[4]; /* Register value */
u16 fan_min[4]; /* Register value */
u8 pwm[3]; /* Register value */
+ u8 pwm_freq[3]; /* Register encoding */
u8 temp_ext[3]; /* Decoded values */
u8 in_ext[8]; /* Decoded values */
u8 vid; /* Register value */
@@ -310,22 +310,40 @@ struct lm85_data {
struct lm85_zone zone[3];
};
-static int lm85_attach_adapter(struct i2c_adapter *adapter);
-static int lm85_detect(struct i2c_adapter *adapter, int address,
- int kind);
-static int lm85_detach_client(struct i2c_client *client);
+static int lm85_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info);
+static int lm85_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int lm85_remove(struct i2c_client *client);
static int lm85_read_value(struct i2c_client *client, u8 reg);
static void lm85_write_value(struct i2c_client *client, u8 reg, int value);
static struct lm85_data *lm85_update_device(struct device *dev);
+static const struct i2c_device_id lm85_id[] = {
+ { "adm1027", adm1027 },
+ { "adt7463", adt7463 },
+ { "lm85", any_chip },
+ { "lm85b", lm85b },
+ { "lm85c", lm85c },
+ { "emc6d100", emc6d100 },
+ { "emc6d101", emc6d100 },
+ { "emc6d102", emc6d102 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lm85_id);
+
static struct i2c_driver lm85_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "lm85",
},
- .attach_adapter = lm85_attach_adapter,
- .detach_client = lm85_detach_client,
+ .probe = lm85_probe,
+ .remove = lm85_remove,
+ .id_table = lm85_id,
+ .detect = lm85_detect,
+ .address_data = &addr_data,
};
@@ -528,11 +546,39 @@ static ssize_t set_pwm_enable(struct device *dev, struct device_attribute
return count;
}
+static ssize_t show_pwm_freq(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct lm85_data *data = lm85_update_device(dev);
+ return sprintf(buf, "%d\n", FREQ_FROM_REG(data->freq_map,
+ data->pwm_freq[nr]));
+}
+
+static ssize_t set_pwm_freq(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ int nr = to_sensor_dev_attr(attr)->index;
+ struct i2c_client *client = to_i2c_client(dev);
+ struct lm85_data *data = i2c_get_clientdata(client);
+ long val = simple_strtol(buf, NULL, 10);
+
+ mutex_lock(&data->update_lock);
+ data->pwm_freq[nr] = FREQ_TO_REG(data->freq_map, val);
+ lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
+ (data->zone[nr].range << 4)
+ | data->pwm_freq[nr]);
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
#define show_pwm_reg(offset) \
static SENSOR_DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \
show_pwm, set_pwm, offset - 1); \
static SENSOR_DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \
- show_pwm_enable, set_pwm_enable, offset - 1)
+ show_pwm_enable, set_pwm_enable, offset - 1); \
+static SENSOR_DEVICE_ATTR(pwm##offset##_freq, S_IRUGO | S_IWUSR, \
+ show_pwm_freq, set_pwm_freq, offset - 1)
show_pwm_reg(1);
show_pwm_reg(2);
@@ -761,31 +807,6 @@ static ssize_t set_pwm_auto_pwm_minctl(struct device *dev,
return count;
}
-static ssize_t show_pwm_auto_pwm_freq(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- int nr = to_sensor_dev_attr(attr)->index;
- struct lm85_data *data = lm85_update_device(dev);
- return sprintf(buf, "%d\n", FREQ_FROM_REG(data->autofan[nr].freq));
-}
-
-static ssize_t set_pwm_auto_pwm_freq(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t count)
-{
- int nr = to_sensor_dev_attr(attr)->index;
- struct i2c_client *client = to_i2c_client(dev);
- struct lm85_data *data = i2c_get_clientdata(client);
- long val = simple_strtol(buf, NULL, 10);
-
- mutex_lock(&data->update_lock);
- data->autofan[nr].freq = FREQ_TO_REG(val);
- lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
- (data->zone[nr].range << 4)
- | data->autofan[nr].freq);
- mutex_unlock(&data->update_lock);
- return count;
-}
-
#define pwm_auto(offset) \
static SENSOR_DEVICE_ATTR(pwm##offset##_auto_channels, \
S_IRUGO | S_IWUSR, show_pwm_auto_channels, \
@@ -795,10 +816,7 @@ static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_min, \
set_pwm_auto_pwm_min, offset - 1); \
static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_minctl, \
S_IRUGO | S_IWUSR, show_pwm_auto_pwm_minctl, \
- set_pwm_auto_pwm_minctl, offset - 1); \
-static SENSOR_DEVICE_ATTR(pwm##offset##_auto_pwm_freq, \
- S_IRUGO | S_IWUSR, show_pwm_auto_pwm_freq, \
- set_pwm_auto_pwm_freq, offset - 1);
+ set_pwm_auto_pwm_minctl, offset - 1)
pwm_auto(1);
pwm_auto(2);
@@ -867,7 +885,7 @@ static ssize_t set_temp_auto_temp_min(struct device *dev,
TEMP_FROM_REG(data->zone[nr].limit));
lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
((data->zone[nr].range & 0x0f) << 4)
- | (data->autofan[nr].freq & 0x07));
+ | (data->pwm_freq[nr] & 0x07));
/* Update temp_auto_hyst and temp_auto_off */
data->zone[nr].hyst = HYST_TO_REG(TEMP_FROM_REG(
@@ -910,7 +928,7 @@ static ssize_t set_temp_auto_temp_max(struct device *dev,
val - min);
lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
((data->zone[nr].range & 0x0f) << 4)
- | (data->autofan[nr].freq & 0x07));
+ | (data->pwm_freq[nr] & 0x07));
mutex_unlock(&data->update_lock);
return count;
}
@@ -957,13 +975,6 @@ temp_auto(1);
temp_auto(2);
temp_auto(3);
-static int lm85_attach_adapter(struct i2c_adapter *adapter)
-{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_probe(adapter, &addr_data, lm85_detect);
-}
-
static struct attribute *lm85_attributes[] = {
&sensor_dev_attr_fan1_input.dev_attr.attr,
&sensor_dev_attr_fan2_input.dev_attr.attr,
@@ -984,6 +995,9 @@ static struct attribute *lm85_attributes[] = {
&sensor_dev_attr_pwm1_enable.dev_attr.attr,
&sensor_dev_attr_pwm2_enable.dev_attr.attr,
&sensor_dev_attr_pwm3_enable.dev_attr.attr,
+ &sensor_dev_attr_pwm1_freq.dev_attr.attr,
+ &sensor_dev_attr_pwm2_freq.dev_attr.attr,
+ &sensor_dev_attr_pwm3_freq.dev_attr.attr,
&sensor_dev_attr_in0_input.dev_attr.attr,
&sensor_dev_attr_in1_input.dev_attr.attr,
@@ -1026,9 +1040,6 @@ static struct attribute *lm85_attributes[] = {
&sensor_dev_attr_pwm1_auto_pwm_minctl.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_pwm_minctl.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_pwm_minctl.dev_attr.attr,
- &sensor_dev_attr_pwm1_auto_pwm_freq.dev_attr.attr,
- &sensor_dev_attr_pwm2_auto_pwm_freq.dev_attr.attr,
- &sensor_dev_attr_pwm3_auto_pwm_freq.dev_attr.attr,
&sensor_dev_attr_temp1_auto_temp_off.dev_attr.attr,
&sensor_dev_attr_temp2_auto_temp_off.dev_attr.attr,
@@ -1103,109 +1114,74 @@ static void lm85_init_client(struct i2c_client *client)
dev_warn(&client->dev, "Device is not ready\n");
}
-static int lm85_detect(struct i2c_adapter *adapter, int address,
- int kind)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int lm85_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info)
{
- int company, verstep;
- struct i2c_client *client;
- struct lm85_data *data;
- int err = 0;
+ struct i2c_adapter *adapter = client->adapter;
+ int address = client->addr;
const char *type_name;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
/* We need to be able to do byte I/O */
- goto ERROR0;
+ return -ENODEV;
}
- /* OK. For now, we presume we have a valid client. We now create the
- client structure, even though we cannot fill it completely yet.
- But it allows us to access lm85_{read,write}_value. */
+ /* If auto-detecting, determine the chip type */
+ if (kind < 0) {
+ int company = lm85_read_value(client, LM85_REG_COMPANY);
+ int verstep = lm85_read_value(client, LM85_REG_VERSTEP);
- if (!(data = kzalloc(sizeof(struct lm85_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto ERROR0;
- }
+ dev_dbg(&adapter->dev, "Detecting device at 0x%02x with "
+ "COMPANY: 0x%02x and VERSTEP: 0x%02x\n",
+ address, company, verstep);
- client = &data->client;
- i2c_set_clientdata(client, data);
- client->addr = address;
- client->adapter = adapter;
- client->driver = &lm85_driver;
-
- /* Now, we do the remaining detection. */
-
- company = lm85_read_value(client, LM85_REG_COMPANY);
- verstep = lm85_read_value(client, LM85_REG_VERSTEP);
-
- dev_dbg(&adapter->dev, "Detecting device at %d,0x%02x with"
- " COMPANY: 0x%02x and VERSTEP: 0x%02x\n",
- i2c_adapter_id(client->adapter), client->addr,
- company, verstep);
-
- /* If auto-detecting, Determine the chip type. */
- if (kind <= 0) {
- dev_dbg(&adapter->dev, "Autodetecting device at %d,0x%02x ...\n",
- i2c_adapter_id(adapter), address);
- if (company == LM85_COMPANY_NATIONAL
- && verstep == LM85_VERSTEP_LM85C) {
- kind = lm85c;
- } else if (company == LM85_COMPANY_NATIONAL
- && verstep == LM85_VERSTEP_LM85B) {
- kind = lm85b;
- } else if (company == LM85_COMPANY_NATIONAL
- && (verstep & LM85_VERSTEP_VMASK) == LM85_VERSTEP_GENERIC) {
- dev_err(&adapter->dev, "Unrecognized version/stepping 0x%02x"
- " Defaulting to LM85.\n", verstep);
- kind = any_chip;
- } else if (company == LM85_COMPANY_ANALOG_DEV
- && verstep == LM85_VERSTEP_ADM1027) {
- kind = adm1027;
- } else if (company == LM85_COMPANY_ANALOG_DEV
- && (verstep == LM85_VERSTEP_ADT7463
- || verstep == LM85_VERSTEP_ADT7463C)) {
- kind = adt7463;
- } else if (company == LM85_COMPANY_ANALOG_DEV
- && (verstep & LM85_VERSTEP_VMASK) == LM85_VERSTEP_GENERIC) {
- dev_err(&adapter->dev, "Unrecognized version/stepping 0x%02x"
- " Defaulting to Generic LM85.\n", verstep);
- kind = any_chip;
- } else if (company == LM85_COMPANY_SMSC
- && (verstep == LM85_VERSTEP_EMC6D100_A0
- || verstep == LM85_VERSTEP_EMC6D100_A1)) {
- /* Unfortunately, we can't tell a '100 from a '101
- * from the registers. Since a '101 is a '100
- * in a package with fewer pins and therefore no
- * 3.3V, 1.5V or 1.8V inputs, perhaps if those
- * inputs read 0, then it's a '101.
- */
- kind = emc6d100;
- } else if (company == LM85_COMPANY_SMSC
- && verstep == LM85_VERSTEP_EMC6D102) {
- kind = emc6d102;
- } else if (company == LM85_COMPANY_SMSC
- && (verstep & LM85_VERSTEP_VMASK) == LM85_VERSTEP_GENERIC) {
- dev_err(&adapter->dev, "lm85: Detected SMSC chip\n");
- dev_err(&adapter->dev, "lm85: Unrecognized version/stepping 0x%02x"
- " Defaulting to Generic LM85.\n", verstep);
- kind = any_chip;
- } else if (kind == any_chip
- && (verstep & LM85_VERSTEP_VMASK) == LM85_VERSTEP_GENERIC) {
- dev_err(&adapter->dev, "Generic LM85 Version 6 detected\n");
- /* Leave kind as "any_chip" */
- } else {
- dev_dbg(&adapter->dev, "Autodetection failed\n");
- /* Not an LM85... */
- if (kind == any_chip) { /* User used force=x,y */
- dev_err(&adapter->dev, "Generic LM85 Version 6 not"
- " found at %d,0x%02x. Try force_lm85c.\n",
- i2c_adapter_id(adapter), address);
+ /* All supported chips have the version in common */
+ if ((verstep & LM85_VERSTEP_VMASK) != LM85_VERSTEP_GENERIC) {
+ dev_dbg(&adapter->dev, "Autodetection failed: "
+ "unsupported version\n");
+ return -ENODEV;
+ }
+ kind = any_chip;
+
+ /* Now, refine the detection */
+ if (company == LM85_COMPANY_NATIONAL) {
+ switch (verstep) {
+ case LM85_VERSTEP_LM85C:
+ kind = lm85c;
+ break;
+ case LM85_VERSTEP_LM85B:
+ kind = lm85b;
+ break;
+ }
+ } else if (company == LM85_COMPANY_ANALOG_DEV) {
+ switch (verstep) {
+ case LM85_VERSTEP_ADM1027:
+ kind = adm1027;
+ break;
+ case LM85_VERSTEP_ADT7463:
+ case LM85_VERSTEP_ADT7463C:
+ kind = adt7463;
+ break;
+ }
+ } else if (company == LM85_COMPANY_SMSC) {
+ switch (verstep) {
+ case LM85_VERSTEP_EMC6D100_A0:
+ case LM85_VERSTEP_EMC6D100_A1:
+ /* Note: we can't tell a '100 from a '101 */
+ kind = emc6d100;
+ break;
+ case LM85_VERSTEP_EMC6D102:
+ kind = emc6d102;
+ break;
}
- err = 0;
- goto ERROR1;
+ } else {
+ dev_dbg(&adapter->dev, "Autodetection failed: "
+ "unknown vendor\n");
+ return -ENODEV;
}
}
- /* Fill in the chip specific driver values */
switch (kind) {
case lm85b:
type_name = "lm85b";
@@ -1228,16 +1204,36 @@ static int lm85_detect(struct i2c_adapter *adapter, int address,
default:
type_name = "lm85";
}
- strlcpy(client->name, type_name, I2C_NAME_SIZE);
+ strlcpy(info->type, type_name, I2C_NAME_SIZE);
+
+ return 0;
+}
- /* Fill in the remaining client fields */
- data->type = kind;
+static int lm85_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct lm85_data *data;
+ int err;
+
+ data = kzalloc(sizeof(struct lm85_data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ i2c_set_clientdata(client, data);
+ data->type = id->driver_data;
mutex_init(&data->update_lock);
- /* Tell the I2C layer a new client has arrived */
- err = i2c_attach_client(client);
- if (err)
- goto ERROR1;
+ /* Fill in the chip specific driver values */
+ switch (data->type) {
+ case adm1027:
+ case adt7463:
+ case emc6d100:
+ case emc6d102:
+ data->freq_map = adm1027_freq_map;
+ break;
+ default:
+ data->freq_map = lm85_freq_map;
+ }
/* Set the VRM version */
data->vrm = vid_which_vrm();
@@ -1248,45 +1244,42 @@ static int lm85_detect(struct i2c_adapter *adapter, int address,
/* Register sysfs hooks */
err = sysfs_create_group(&client->dev.kobj, &lm85_group);
if (err)
- goto ERROR2;
+ goto err_kfree;
/* The ADT7463 has an optional VRM 10 mode where pin 21 is used
as a sixth digital VID input rather than an analog input. */
data->vid = lm85_read_value(client, LM85_REG_VID);
- if (!(kind == adt7463 && (data->vid & 0x80)))
+ if (!(data->type == adt7463 && (data->vid & 0x80)))
if ((err = sysfs_create_group(&client->dev.kobj,
&lm85_group_in4)))
- goto ERROR3;
+ goto err_remove_files;
/* The EMC6D100 has 3 additional voltage inputs */
- if (kind == emc6d100)
+ if (data->type == emc6d100)
if ((err = sysfs_create_group(&client->dev.kobj,
&lm85_group_in567)))
- goto ERROR3;
+ goto err_remove_files;
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
- goto ERROR3;
+ goto err_remove_files;
}
return 0;
/* Error out and cleanup code */
- ERROR3:
+ err_remove_files:
sysfs_remove_group(&client->dev.kobj, &lm85_group);
sysfs_remove_group(&client->dev.kobj, &lm85_group_in4);
- if (kind == emc6d100)
+ if (data->type == emc6d100)
sysfs_remove_group(&client->dev.kobj, &lm85_group_in567);
- ERROR2:
- i2c_detach_client(client);
- ERROR1:
+ err_kfree:
kfree(data);
- ERROR0:
return err;
}
-static int lm85_detach_client(struct i2c_client *client)
+static int lm85_remove(struct i2c_client *client)
{
struct lm85_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
@@ -1294,7 +1287,6 @@ static int lm85_detach_client(struct i2c_client *client)
sysfs_remove_group(&client->dev.kobj, &lm85_group_in4);
if (data->type == emc6d100)
sysfs_remove_group(&client->dev.kobj, &lm85_group_in567);
- i2c_detach_client(client);
kfree(data);
return 0;
}
@@ -1481,7 +1473,7 @@ static struct lm85_data *lm85_update_device(struct device *dev)
data->autofan[i].config =
lm85_read_value(client, LM85_REG_AFAN_CONFIG(i));
val = lm85_read_value(client, LM85_REG_AFAN_RANGE(i));
- data->autofan[i].freq = val & 0x07;
+ data->pwm_freq[i] = val & 0x07;
data->zone[i].range = val >> 4;
data->autofan[i].min_pwm =
lm85_read_value(client, LM85_REG_AFAN_MINPWM(i));
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-02 04:22:50 +0000