summaryrefslogtreecommitdiff
path: root/drivers/hwmon/lm87.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/hwmon/lm87.c')
-rw-r--r--drivers/hwmon/lm87.c136
1 files changed, 51 insertions, 85 deletions
diff --git a/drivers/hwmon/lm87.c b/drivers/hwmon/lm87.c
index a5e295826aea..13cca3606e06 100644
--- a/drivers/hwmon/lm87.c
+++ b/drivers/hwmon/lm87.c
@@ -121,7 +121,7 @@ static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
#define IN_FROM_REG(reg, scale) (((reg) * (scale) + 96) / 192)
#define IN_TO_REG(val, scale) ((val) <= 0 ? 0 : \
- (val) * 192 >= (scale) * 255 ? 255 : \
+ (val) >= (scale) * 255 / 192 ? 255 : \
((val) * 192 + (scale) / 2) / (scale))
#define TEMP_FROM_REG(reg) ((reg) * 1000)
@@ -154,7 +154,6 @@ static u8 LM87_REG_TEMP_LOW[3] = { 0x3A, 0x38, 0x2C };
*/
struct lm87_data {
- struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* zero until following fields are valid */
unsigned long last_updated; /* In jiffies */
@@ -181,6 +180,8 @@ struct lm87_data {
u16 alarms; /* register values, combined */
u8 vid; /* register values, combined */
u8 vrm;
+
+ const struct attribute_group *attr_groups[6];
};
static inline int lm87_read_value(struct i2c_client *client, u8 reg)
@@ -195,7 +196,7 @@ static inline int lm87_write_value(struct i2c_client *client, u8 reg, u8 value)
static struct lm87_data *lm87_update_device(struct device *dev)
{
- struct i2c_client *client = to_i2c_client(dev);
+ struct i2c_client *client = dev_get_drvdata(dev);
struct lm87_data *data = i2c_get_clientdata(client);
mutex_lock(&data->update_lock);
@@ -309,7 +310,7 @@ static ssize_t show_in_max(struct device *dev,
static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
+ struct i2c_client *client = dev_get_drvdata(dev);
struct lm87_data *data = i2c_get_clientdata(client);
int nr = to_sensor_dev_attr(attr)->index;
long val;
@@ -330,7 +331,7 @@ static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
+ struct i2c_client *client = dev_get_drvdata(dev);
struct lm87_data *data = i2c_get_clientdata(client);
int nr = to_sensor_dev_attr(attr)->index;
long val;
@@ -396,7 +397,7 @@ static ssize_t show_temp_high(struct device *dev,
static ssize_t set_temp_low(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
+ struct i2c_client *client = dev_get_drvdata(dev);
struct lm87_data *data = i2c_get_clientdata(client);
int nr = to_sensor_dev_attr(attr)->index;
long val;
@@ -416,7 +417,7 @@ static ssize_t set_temp_low(struct device *dev, struct device_attribute *attr,
static ssize_t set_temp_high(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
+ struct i2c_client *client = dev_get_drvdata(dev);
struct lm87_data *data = i2c_get_clientdata(client);
int nr = to_sensor_dev_attr(attr)->index;
long val;
@@ -495,7 +496,7 @@ static ssize_t show_fan_div(struct device *dev,
static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
+ struct i2c_client *client = dev_get_drvdata(dev);
struct lm87_data *data = i2c_get_clientdata(client);
int nr = to_sensor_dev_attr(attr)->index;
long val;
@@ -522,7 +523,7 @@ static ssize_t set_fan_min(struct device *dev, struct device_attribute *attr,
static ssize_t set_fan_div(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
+ struct i2c_client *client = dev_get_drvdata(dev);
struct lm87_data *data = i2c_get_clientdata(client);
int nr = to_sensor_dev_attr(attr)->index;
long val;
@@ -635,7 +636,7 @@ static ssize_t show_aout(struct device *dev, struct device_attribute *attr,
static ssize_t set_aout(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
- struct i2c_client *client = to_i2c_client(dev);
+ struct i2c_client *client = dev_get_drvdata(dev);
struct lm87_data *data = i2c_get_clientdata(client);
long val;
int err;
@@ -841,23 +842,18 @@ static int lm87_detect(struct i2c_client *client, struct i2c_board_info *info)
return 0;
}
-static void lm87_remove_files(struct i2c_client *client)
+static void lm87_restore_config(void *arg)
{
- struct device *dev = &client->dev;
-
- sysfs_remove_group(&dev->kobj, &lm87_group);
- sysfs_remove_group(&dev->kobj, &lm87_group_in6);
- sysfs_remove_group(&dev->kobj, &lm87_group_fan1);
- sysfs_remove_group(&dev->kobj, &lm87_group_in7);
- sysfs_remove_group(&dev->kobj, &lm87_group_fan2);
- sysfs_remove_group(&dev->kobj, &lm87_group_temp3);
- sysfs_remove_group(&dev->kobj, &lm87_group_in0_5);
- sysfs_remove_group(&dev->kobj, &lm87_group_vid);
+ struct i2c_client *client = arg;
+ struct lm87_data *data = i2c_get_clientdata(client);
+
+ lm87_write_value(client, LM87_REG_CONFIG, data->config);
}
-static void lm87_init_client(struct i2c_client *client)
+static int lm87_init_client(struct i2c_client *client)
{
struct lm87_data *data = i2c_get_clientdata(client);
+ int rc;
if (dev_get_platdata(&client->dev)) {
data->channel = *(u8 *)dev_get_platdata(&client->dev);
@@ -868,6 +864,10 @@ static void lm87_init_client(struct i2c_client *client)
}
data->config = lm87_read_value(client, LM87_REG_CONFIG) & 0x6F;
+ rc = devm_add_action(&client->dev, lm87_restore_config, client);
+ if (rc)
+ return rc;
+
if (!(data->config & 0x01)) {
int i;
@@ -895,12 +895,15 @@ static void lm87_init_client(struct i2c_client *client)
if ((data->config & 0x09) != 0x01)
lm87_write_value(client, LM87_REG_CONFIG,
(data->config & 0x77) | 0x01);
+ return 0;
}
static int lm87_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
struct lm87_data *data;
+ struct device *hwmon_dev;
int err;
+ unsigned int group_tail = 0;
data = devm_kzalloc(&client->dev, sizeof(struct lm87_data), GFP_KERNEL);
if (!data)
@@ -910,7 +913,9 @@ static int lm87_probe(struct i2c_client *client, const struct i2c_device_id *id)
mutex_init(&data->update_lock);
/* Initialize the LM87 chip */
- lm87_init_client(client);
+ err = lm87_init_client(client);
+ if (err)
+ return err;
data->in_scale[0] = 2500;
data->in_scale[1] = 2700;
@@ -921,72 +926,34 @@ static int lm87_probe(struct i2c_client *client, const struct i2c_device_id *id)
data->in_scale[6] = 1875;
data->in_scale[7] = 1875;
- /* Register sysfs hooks */
- err = sysfs_create_group(&client->dev.kobj, &lm87_group);
- if (err)
- goto exit_stop;
-
- if (data->channel & CHAN_NO_FAN(0)) {
- err = sysfs_create_group(&client->dev.kobj, &lm87_group_in6);
- if (err)
- goto exit_remove;
- } else {
- err = sysfs_create_group(&client->dev.kobj, &lm87_group_fan1);
- if (err)
- goto exit_remove;
- }
-
- if (data->channel & CHAN_NO_FAN(1)) {
- err = sysfs_create_group(&client->dev.kobj, &lm87_group_in7);
- if (err)
- goto exit_remove;
- } else {
- err = sysfs_create_group(&client->dev.kobj, &lm87_group_fan2);
- if (err)
- goto exit_remove;
- }
-
- if (data->channel & CHAN_TEMP3) {
- err = sysfs_create_group(&client->dev.kobj, &lm87_group_temp3);
- if (err)
- goto exit_remove;
- } else {
- err = sysfs_create_group(&client->dev.kobj, &lm87_group_in0_5);
- if (err)
- goto exit_remove;
- }
+ /*
+ * Construct the list of attributes, the list depends on the
+ * configuration of the chip
+ */
+ data->attr_groups[group_tail++] = &lm87_group;
+ if (data->channel & CHAN_NO_FAN(0))
+ data->attr_groups[group_tail++] = &lm87_group_in6;
+ else
+ data->attr_groups[group_tail++] = &lm87_group_fan1;
+
+ if (data->channel & CHAN_NO_FAN(1))
+ data->attr_groups[group_tail++] = &lm87_group_in7;
+ else
+ data->attr_groups[group_tail++] = &lm87_group_fan2;
+
+ if (data->channel & CHAN_TEMP3)
+ data->attr_groups[group_tail++] = &lm87_group_temp3;
+ else
+ data->attr_groups[group_tail++] = &lm87_group_in0_5;
if (!(data->channel & CHAN_NO_VID)) {
data->vrm = vid_which_vrm();
- err = sysfs_create_group(&client->dev.kobj, &lm87_group_vid);
- if (err)
- goto exit_remove;
- }
-
- data->hwmon_dev = hwmon_device_register(&client->dev);
- if (IS_ERR(data->hwmon_dev)) {
- err = PTR_ERR(data->hwmon_dev);
- goto exit_remove;
+ data->attr_groups[group_tail++] = &lm87_group_vid;
}
- return 0;
-
-exit_remove:
- lm87_remove_files(client);
-exit_stop:
- lm87_write_value(client, LM87_REG_CONFIG, data->config);
- return err;
-}
-
-static int lm87_remove(struct i2c_client *client)
-{
- struct lm87_data *data = i2c_get_clientdata(client);
-
- hwmon_device_unregister(data->hwmon_dev);
- lm87_remove_files(client);
-
- lm87_write_value(client, LM87_REG_CONFIG, data->config);
- return 0;
+ hwmon_dev = devm_hwmon_device_register_with_groups(
+ &client->dev, client->name, client, data->attr_groups);
+ return PTR_ERR_OR_ZERO(hwmon_dev);
}
/*
@@ -1006,7 +973,6 @@ static struct i2c_driver lm87_driver = {
.name = "lm87",
},
.probe = lm87_probe,
- .remove = lm87_remove,
.id_table = lm87_id,
.detect = lm87_detect,
.address_list = normal_i2c,
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-24 17:58:07 +0300